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»
Indonesian government delegation visits LENA

In November 2018, a delegation from the Indonesian Ministry of Research visited IG-Nano, the Indonesian-German Centre for Nano and Quantum Technologies, to get an idea of the German-Indonesian cooperation.

[ read more | TU Braunschweig ]

 

»
Dr. Hutomo Suryo Wasisto received MRS-id Young Materials Scientist Award
for his dedication and innovation in the research of microscopic devices within the optoelectromechanical integrated nanosystems for sensing applications.
 

 

[ MRS-id 2018 Conference ]   [ photos of the laureate and his certificate ]

 

»
EU-funded ChipScope Project Gets Leading Companies on Board

The ChipScope project aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. The new microscope will be affordable and ubiquitously available.

Two international players in the field of imaging and microscopy, Nikon and Carl Zeiss GmbH, have joined the Industrial Advisory Board of the European funded research project ChipScope.

[ read more ]

 

»
Indonesian scientists visiting LENA
Lightweight and versatile nanosensors and the fundamentals of their research and development are the focus of an intensive course of the Indonesian-German Center for Nano and Quantum Technologies (IG-Nano) in Braunschweig. Scientists from the Indonesian Institute of Science (LIPI) are visiting the Laboratory for Emerging Nanometrology (LENA) until the end of the month.

[ read more ]

 

»
10 Jahre Internationale Graduiertenschule für Metrologie B-IGSM
Seit 10 Jahren gibt es die Braunschweig International Graduate School of Metrology (B-IGSM). Über 100 Nachwuchswissenschaftlerinnen und -wissenschaftler sind seitdem aus allen Kontinenten nach Braunschweig gekommen, um den Grundstein für eine Karriere in der Forschung zu legen und auf höchstem Niveau zu Themen aus der Messtechnik zu forschen.

[ read more ]

 

»
Antragsskizze QuantumFrontiers: Für die Endrunde der Exzellenzstrategie ausgewählt
Das gemeinsame Forschungsvorhaben „Quantum Frontiers“ der Wissenschaftsallianz Hannover-Braunschweig hat erfolgreich die erste Runde der gemeinsamen Exzellenzinitiative von Bund und Ländern absolviert. Das Vorhaben wird nun zu einem Vollantrag aufgefordert und hat Aussicht als Exzellenzcluster Spitzenforschung auf internationalem Niveau betreiben. Ausgewählt wurden 88 aus insgesamt 195 Antragsskizzen von 63 Hochschulen. Über die Einrichtung der deutschlandweit insgesamt 45 bis 50 Exzellenzclustern wird im September 2018 entschieden.

[ read more ]   [ Interview with Prof. Waag, LENA speaker ]

 

»
Publication: Plasmonics Enhanced Smartphone Fluorescence Microscopy
Smartphone fluorescence microscopy has various applications in point-of-care (POC) testing and diagnostics. An important need in smartphone-based microscopy and sensing techniques is to improve the detection sensitivity. Here, the latest Open Access publication by Dr. Acuna, Prof. Tinnefeld and partners from the University of California demonstrates a general strategy to enhance the detection sensitivity of a smartphone-based fluorescence microscope by using surface-enhanced fluorescence (SEF) created by a thin metal-film.

[ read more ]

 

»
Interview with Prof. Andreas Waag
The exciting story of NanoLight as well as NanoParticles and Quantum Techniques is told by Professor Andreas Waag. He is one of the leading minds of the strategic research area „Quantum and Nanometrology“ (QUANOMET), supported by the state ministry for research of lower Saxony and head of the Laboratory for Emerging Nanometrology (LENA) at the TU Braunschweig.

[ read more ] [ Dossier: Quantum Frontiers ]

 

»
Microchips replacing microscopes
Start-up project Superlight Photonics plans to make it big with tiny LEDs: In terms of location, Superlight Photonics is already at the top: its office is on the 14th (and top) floor of the TU tower block on Hans-Sommer-Straße. From here, the six researchers plan to take over the nano world, not only scientifically but also commercially speaking. The centrepiece of their technology: nanometre-sized blue light-emitting diodes (LEDs) made of gallium nitride.

[ read more ] [ Dossier: Quantum Frontiers ]

 

»
The light tamer
Portrait Prof. Dr. Stefanie Kroker | Stefanie Kroker was a little surprised when she received the job offer. It was only her first job application after earning a doctorate in physics. “But I was very happy that it worked out right away”, she proclaims. Since April 2016, the 32-year-old junior professor has been leading the Metrology for Functional Nanosystems junior research group at LENA, the joint research centre of TU Braunschweig and the National Metrology Institute of Germany (PTB).

[ read more ] [ Dossier: Quantum Frontiers ]

 

»
A team for luminous nanosensors
An inverview with Dr. Hutomo Suryo Wasisto, head of the junior research group OptoSense (Optochemical Integrated Nanosystems for Sensing) at the Laboratory for Emerging Nanometrology (LENA), and his doctoral candidates Tony Granz, Gregor Scholz and Klaas Strempel, about cultural diversity in science, the appeal of gallium nitride and why young scientists especially should venture out of the lab every now and again.

[ read more ] [ Dossier: Quantum Frontiers ] [ Video ]

 

»
Recipe for tiny 3D light-emitting diodes
Portrait Dipl.-Ing. Jana Hartmann | Like she does most mornings, Jana Hartmann exchanges her street shoes for white clogs, puts on white overalls and latex gloves and dons a medical cap. Then she enters “her realm”: the clean room at the Institute for Semiconductor Technology, on the 10th floor of the TU tower block on Hans-Sommer-Straße. Any kind of dirt is taboo here, hence the protective clothing. Then the electronic engineer resumes work on her doctorate.

[ read more ] [ Dossier: Quantum Frontiers ]

 

»
Challenging European Research Project to Develop New Tiny Microscopes

The Institute of Semiconductor Technology (Waag Lab) and the Institute of Physical and Theoretical Chemistry (Tinnefeld Lab) both members of the Laboratory for Emerging Nanometrology (LENA) at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.

To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time the interior of cells present in a disease called Idiopathic Pulmonary Fibrosis (IPF), a chronic age-related lung disease killing 0.5 Million people each year worldwide.

[ read more ] [ Video ]

 

»
Publication: Mirage effect induced by optical antennas at the nanoscale

During the last decade, scientists have focused on the study of antennas which are approximately a billion times smaller than the typical antenna sticking out of our bathroom radio. These antennas are based on metallic nanostructures of different materials (such as for example gold) and different shapes (such as for example spheres). Furthermore, these antennas can also act as receivers and emitters of electromagnetic radiation but at much shorter wavelengths, in the sub-micrometer range covering the optical spectrum. These optical antennas are of great interest to control light at the nanoscale beyond common optical resolution.

Scientists at TU-Braunschweig directed by Prof. Philip Tinnefeld and junior research group leader Dr. Guillermo Acuna (Institute for Physical Chemistry, Laboratory of Emerging Nanometrology) have performed novel contributions to the understanding of these optical antennas. To this end, they have employed the so-called DNA origami technique to place gold spherical nanoparticles next to fluorescent molecules.

[ read more ]

 

»
More News you will find in our News Archive

NanoMet | Research Training Group 1952/1 »Metrology for Complex Nanosystems«

 

The advancement of metrology as the science of precise and traceable measurements is the indispensable basis for future progress not only in natural sciences and technology, but also for trade and society. The quest for higher precision, better standardization, ubiquitous calibration and primary standards drives the metrological research of today. At the heart of metrology is traceability to the SI units as the establishment of a documented unbroken chain of calibrations complemented by the analysis of all contributions to measurement uncertainty, i.e. of the complete error budget.

One emerging topic is the metrology of nanosystems. Here a limited number of parameters of a measurand can be dealt with using established concepts for obtaining traceability with small measurement uncertainty, but many important measurands require new approaches.

In particular, challenges arise from multiparametric interdependencies that determine complex measurands. For traceability of such measurands in biological nanosystems new approaches are also needed for many reasons, including self-organization, cell growth, and matrix effects. Moreover, quantum effects, such as entanglement, are especially important in nanosystems. They compromise the independence of different measurements and require new paradigms of traceability and measurement uncertainty determination.

The Technische Universität Braunschweig (TU BS) and the Physikalisch-Technische Bundesanstalt (PTB) organise the research training group NanoMet to establish new routes towards traceability of measurands of complex nanosystems.

We focus on methods in three fields of nanometrology: complex measurands with multiparametric interdependencies, complex measurands in biological nanosystems, and measurands based on quantum effects determine the scientific training programme. This interdisciplinary approach will lead to a better understanding and application of general strategies to achieve traceability of novel measurands emerging in complex nanosystems.

Joint mentoring by scientists from the TU Braunschweig and the German national metrology institute PTB is a unique feature of this research training group ensuring that its graduates will gain an in-depth understanding of the established and novel concepts of metrology and its application in upcoming fields of technology.

Research

 

Der Fortschritt der Metrologie als der Wissenschaft vom präzisen und rückführbaren Messenist eine unverzichtbare Basis für den zukünftigen Fortschritt in Naturwissenschaft und Technologie und darüber hinaus für Handel und Gesellschaft. Die metrologische Forschung von heute wird bestimmt von den Herausforderungen nach höherer Präzision, besserer Standardisierung, genauerer Kalibrierung und gut verfügbaren Primärstandards. Das Herz der Metrologie bildet die Rückführbarkeit auf die SI-Einheiten, die durch eine ununterbrochene, wohl dokumentierte Kette von Kalibrierungen und letztlich die Rückführung auf die Primärstandards, die durch die Analyse aller Beiträge zur Messunsicherheit, d.h. des gesamten Fehlerbudgets, ergänzt wird.

Ein neu entstehender Bereich der Metrologie bezieht sich auf Nanosysteme. Solange nur eine begrenzte Anzahl von Messgrößen vorliegt, können etablierte Konzepte angewendet werden, um Rückführbarkeit mit kleiner Messunsicherheit zu erreichen. Viele sehr wichtige Messgrößen der Nanometrologie erfordern jedoch neue Herangehensweisen. Insbesondere entstehen neue Herausforderungen durch gegenseitige Abhängigkeiten vieler Parameter einer komplexen Messgröße der Nanometrologie. Die Vielfalt und Varianz solcher Messgrößen in biologischen Nanosystemen erfordert ebenfalls neue Konzepte. Dies ist u.a. durch die Größe und Struktur der Messgrößen bedingt. So müssen z.B. wenn es um Funktionen geht, häufig verschiedene strukturelle Ebenen betrachtet werden (Stichwort: Proteomics).

Darüber hinaus werden in Nanosystemen Quanteneffekte besonders wichtig, die insbesondere für Primärstandards immer größere Bedeutung erlangen, beispielsweise die Verschränkung einzelner Photonenpaare. Durch das Auftreten von Unschärferelationen verschiedener Observablen der Nanometrologie ist die Unabhängigkeit der Messungen und insbesondere ihrer Messunsicherheit nicht mehr gegeben und erfordert neue Paradigmen der Rückführbarkeit und zur Bestimmung der Messunsicherheit.

 

Members

 

Beteiligte Institute der TU Braunschweig

Fakultät 2 | Lebenswissenschaften

Fakultät 4 | Maschinenbau

Fakultät 5 | Elektrotechnik, Informationstechnik, Physik

 

Beteiligte Fachabteilungen der PTB

Abteilung 2 | Elektrizität mehr

Abteilung 3 | Chemische Physik und Explosionsschutz

Abteilung 4 | Optik mehr

Abteilung 5 | Fertigungsmesstechnik mehr

Publications

 

» 2017

B. Hampel, M. Martens, M. Temming, T. Trame, F. Ludwig, M. Schilling: HTS Multimaterial Gradiometer Modules for YBa2Cu3O7 SQUID Systems. IEEE Transactions on Applied Superconductivity 27 (4), 1602105 (2017); http://dx.doi.org/10.1109/TASC.2017.2672724

B. Hampel, S. Monshausen, M.Schilling: Properties and applications of electrically conductive thermoplastics for additive manufacturing of sensors. Technisches Messen 84 (9), 593-599 (2017); http://dx.doi.org/10.1515/teme-2016-0057

P. Hashemi, L. Luckau, P. Mischnick, S. Schmidt, R. Stosch, B. Wünsch: Biomacromolecules as tools and objects in nanometrology — current challenges and perspectives. Ana. Bioanal. Chem. 2017, http://dx.doi.org/10.1007/s00216-017-0554-9

F. Lüönd, C.-C. Kalmbach, F. Overney, J. Schurr, B. Jeanneret, A. Müller, M. Kruskopf, K. Pierz, F. Ahlers: AC quantum Hall effect in epitaxial graphene. IEEE Transactions on Instrumentation and Measurement 66 (6), 1459-1466 (2017); http://dx.doi.org/10.1109/TIM.2017.2652501

M. Kruskopf, K. Pierz, D. M. Pakdehi, S. Wundrack, R. Stosch, A. Bakin, H. W. Schumacher: Tailoring the SiC surface – a morphology study on the epitaxial growth of the buffer layer and graphene. arXiv: 1704.08078, submitted to J. Phys. Condens. Matter, July 2017

J. Schurr, C.-C. Kalmbach, F. J. Ahlers, F. Hohls, A. Müller, M. Kruskopf, K. Pierz, T. Bergsten, R. J. Haug: Magnetocapacitance and dissipation factor of epitaxial graphene based quantum Hall effect devices. submitted to Phys. Rev. B, 2017

M. Raab, C. Vietz, F. D. Stefani, G. P. Acuna, P Tinnefeld: Shifting molecular localization by plasmonic coupling in a single-molecule mirage. Nature Communications 8, 13966 (2017); http://dx.doi.org/10.1038/ncomms13966

M. Raab, F. Stefani, G. P. Acuna, P. Tinnefeld: Single-Molecule Mirage: Apparent displacement of molecules through plasmonic interactions. Nature Commun. 8, 13966 (2017); http://dx.doi.org/10.1038/ncomms13966

B. Rodiek, M. Lopez, H. Hofer, G. Porrovecchio, M. Šmid, X.-L. Chu, S. Gotzinger, V. Sandoghdar, S. Lindner, C. Becher, S. Kück: Experimental realization of an absolute single-photon source based on a single nitrogen vacancy center in a nanodiamond. Optica 4 (1), 71-76 (2017); http://dx.doi.org/10.1364/OPTICA.4.000071

N. Steinki, J. L. Winter, D. S. Grachtrup, D. Menzel, S. Süllow, A. Knappschneider, B. Albert: Electronic and magnetic ground state of MnB4. Journal of Alloys and Compounds 695, 2149-2153 (2017); http://dx.doi.org/10.1016/j.jallcom.2016.11.060

D. Schulze Grachtrup, N. Steinki, S. Süllow, Z. Cakir, G. Zwicknagl, Y. Krupko, I. Sheikin, M. Jaime, J. A. Mydosh: Magnetic phase diagram and electronic structure of UPt2Si2 at high magnetic fields: A possible field-induced Lifshitz transition. Phys. Rev. B 95, 134422 (2017); http://dx.doi.org/10.1103/PhysRevB.95.134422

P. Struszewski, M. Bieler, D. Humphreys, H. Bao, M. Peccianti, A. Pasquazi: Characterization of High-Speed Balanced Photodetectors. IEEE Transaction on Instrumentation and Measurement 66 (6), 1613-1620 (2017); http://dx.doi.org/10.1109/TIM.2016.2647519

 

» 2016

H. Broistedt, R. Tutsch: Zufalls-Phasenschiebe-Interferometer zur Messung sphärischer Flächen. Dissertation. Schriftenreihe des Instituts für Produktionsmesstechnik, Band 11 (2016), ISBN: ISBN 978-3-8440-4275-7; http://dx.doi.org/10.2370/9783844042757

S. Gangula, M. Nimtz, P. Mischnick: Relative ion intensities of maltooligosaccharide ethers in electrospray ionization ion trap mass spectrometry: A quantitative evaluation. International Journal of Mass Spectrometry 402, 57-65 (2016); http://dx.doi.org/10.1016/j.ijms.2016.01.009

S. Gangula, M. Nimtz, P. Mischnick: Relative ion intensities of maltooligosaccharide ethers in electrospray ionization ion trap mass spectrometry: A quantitative evaluation. International Journal of Mass Spectrometry 402, 57-65 (2016); http://dx.doi.org/10.1016/j.ijms.2016.01.009

B. Hampel, S. Monshausen, M. Schilling: Charakterisierung von elektrisch leitfähigen Thermoplasten für die Additive Fertigung, XXX. Messtechnisches Symposium des AHMT e.V., 53-60 (2016); http://dx.doi.org/10.1515/9783110494297-008

A. Kraus, C. Hein, H. Bremers, U. Rossow, A. Hangleiter: Growth kinetics and island evolution during double-pulsed molecular beam epitaxy of InN. J. Appl. Phys. 119, 235308 (2016); http://dx.doi.org/10.1063/1.495428

P. Horenburg, E. R. Buß, U. Rossow, H. Bremers, F. A. Ketzer, A. Hangleiter: Strain dependence of In incorporation in m-oriented GaInN/GaN multi quantum well structures. AIP Publishing 108 (10), 102105 (2016); http://dx.doi.org/10.1063/1.4943232

C.-C. Kalmbach, F. J. Ahlers, J. Schurr, A. Müller, J. Feilhauer, M. Kruskopf, K. Pierz, F. Hohls, R. J. Haug: Nonequilibrium mesoscopic conductance fluctuations as the origin of 1/f noise in epitaxial graphene. Phys. Rev. B 94, 205430 (2016); http://dx.doi.org/10.1103/PhysRevB.94.205430

M. Kruskopf, D. M. Pakdehi, K. Pierz, S. Wundrack, R. Stosch, T. Dziomba, M. Götz, J. Baringhaus, J. Aprojanz, C. Tegenkamp, J. Lidzba, T. Seyller, F. Hohls, F. J. Ahlers, H. W. Schumacher: Comeback of epitaxial graphene for electronics: large-area growth of bilayer-free graphene on SiC, 2D Materials 3 (4), 10 (2016); http://dx.doi.org/10.1088/2053-1583/3/4/041002

K. Pierz, M. Kruskopf: Hersellung von Graphen für die Metrologie, PTB-Mitteilungen 126 (3) 41-48 (2016); http://dx.doi.org/10.7795/310.20160306

C.-C. Kalmbach, J. Schurr, A. Müller, M. Kruskopf, K. Pierz, F. J. Ahlers: Dissipation factor and frequency dependence of graphene quantum Hall devices. Conference on Precision Electromagnetic Measurements (CPEM 2016); http://dx.doi.org/10.1109/CPEM.2016.7540518

F. Lüönd, F. Overney, B. Jeanneret, A. Müller, M. Kruskopf, K. Pierz: AC quantum Hall effect in epitaxial graphene. Conference on Precision Electromagnetic Measurements (CPEM 2016); http://dx.doi.org/10.1109/CPEM.2016.7540655

P. Kar, S. Sardar, B. Liu, M. Sreemany, P. Lemmens, S. Ghosh, S. K. Pal: Facile synthesis of reduced graphene oxide–gold nanohybrid for potential use in industrial waste-water treatment. Science and Technology of Advanced Materials 17, 375-386 (2016); http://dx.doi.org/10.1080/14686996.2016.1201413

S. Sardar, S. Ghosh, H. Remita, P. Kar, B. Liu, C. Bhattacharya, P. Lemmens, S. Kumar Pal: Enhanced photovoltage in DSSCs: synergistic combination of a silver modified TiO2 photoanode and a low cost counter electrode. RSC Advances 40, 33433-33442 (2016); http://dx.doi.org/10.1039/C6RA01863G

M. Khatun, S. Choudhury, B. Liu, P. Lemmens, S. K. Pal, S. Mazumder: Resveratrol--ZnO nanohybrid enhanced anti-cancerous effect in ovarian cancer cells through ROS, RSC Advances 6 (107), 105607-105617 (2016); http://dx.doi.org/10.1039/C6RA16664D

P. Kar, S. Sardar, B. Liu, M. Sreemany, P. Lemmens, S. Ghosh, S. K. Pal: Facile Synthesis of Reduced Graphene Oxide-gold Nanohybrid for Potential Use in Industrial Waste-water Treatment. Sci. Tech. Adv. Mat. 17, 375 (2016); http://dx.doi.org/10.1080/14686996.2016.1201413

A. Gad, M. W. G. Hoffmann, O. Casals, L. Mayrhofer, C. Fàbrega, L. Caccamo, F. Hernández-Ramírez, M. S. Mohajerani, M. Moseler, H. Shen, A. Waag, J. D. Prades: Integrated Strategy toward Self-Powering and Selectivity Tuning of Semiconductor Gas Sensors. ACS Sens. 1 (10), 1256-1264 (2016); http://dx.doi.org/10.1021/acssensors.6b00508

M. S. Mohajerani, S. Khachadorian, T. Schimpke, C. Nenstiel, J. Hartmann, J. Ledig, A. Avramescu, M. Straßburg, A. Hoffmann, A. Waag: Evaluation of local free carrier concentrations in individual heavily-doped GaN:Si micro-rods by micro-Raman spectroscopy. Applied Physics Letters. 108, 091112 (2016), http://dx.doi.org/10.1063/1.4943079

A. Gad, M. W. G. Hoffmann, O. Casals, L. Mayrhofer, C. Fàbrega, L. Caccamo, F. Hernández-Ramírez, M. S. Mohajerani, M. Moseler, H. Shen, A. Waag, J. D. Prades: Integrated Strategy toward Self-Powering and Selectivity Tuning of Semiconductor Gas Sensors. ACS Sens. 1 (10), 1256-1264 (2016); http://dx.doi.org/10.1021/acssensors.6b00508

M. S. Mohajerani, M. Müller, J. Hartmann, H. Zhou, H.-H. Wehmann, P. Veit, F. Bertram, J. Christen, A. Waag: Direct correlations of structural and optical properties of three-dimensional GaN/InGaN core/shell micro-light emitting diodes. Japanese Journal of Applied Physics 55, 05FJ09 (2016); http://dx.doi.org/10.7567/JJAP.55.05FJ09

M. S. Mohajerani, S. Khachadorian, C. Nenstiel, T. Schimpke, A. Avramescu, M. Strassburg, A. Hoffmann, A. Waag: Estimation of free carrier concentrations in high-quality heavily doped GaN: Si micro-rods by photoluminescence and Raman spectroscopy. Proc. of SPIE Vol 9768, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX, 976803-1 (2016); http://dx.doi.org/10.1117/12.2212890

L. Caccamo, G. Cocco, G. Martín, H. Zhou, S. Fundling, A. Gad, M. S. Mohajerani, M. Abdelfatah, S. Estradé, F. Peiró, W. Dziony, H. Bremers, A. Hangleiter, L. Mayrhofer, G. Lilienkamp, M. Moseler, W. Daum, A. Waag: Insights into Interfacial Changes and Photoelectrochemical Stability of InxGa1–xN (0001) Photoanode Surfaces in Liquid Environments. ACS applied materials & interfaces 8, 8232-8238 (2016); http://dx.doi.org/10.1021/acsami.5b12583

J. Molle, M. Raab, S. Holzmeister, D. Schmitt-Monreal, D. Grohmann, Z. He, P. Tinnefeld: Superresolution microscopy with transient binding. Current Opinion in Biotechnology 39, 8-16 (2016); http://dx.doi.org/10.1016/j.copbio.2015.12.009

F. Nording, N. Boy, F. Ludwig, M. Schilling: Magnetisierungsmessaufbau zur magnetischen Charakterisierung dünner Permalloyschichten. XXX. Messtechnisches Symposium des AHMT e.V., 159-166 (2016); http://dx.doi.org/10.1515/9783110494297-021

J. Ostermann, I. Busch, J. Flügge, L. Koenders, P. Lemmens, O. Lenck, R. Popadic: Implementation of a metrological UHV-STM. euspen's 16th International Conference & Exhibition, Nottingham, UK, May 2016, ISBN: 978-0-9566790-8-6

K. Dhoska, H. Hofer, B. Rodiek, M. López, T. Kübarsepp, S. Kück: Improvement of the detection efficiency calibration and homogeneity measurement of Si-SPAD detectors. SpringerPlus 5, 2065 (2016); http://dx.doi.org/10.1186/s40064-016-3735-7

G. Porrovecchio, M. Šmid, M. López, H. Hofer, B. Rodiek, S. Kück: Comparison at the sub-100 fW optical power level of calibrating a single-photon detector using a high-sensitive, low-noise silicon photodiode and the double attenuator technique. Metrologia 53 (4), 1115 (2016); http://dx.doi.org/10.1088/0026-1394/53/4/1115

B. Probst, F. Domínguez, A. Schroer, A. Levy Yeyati, P. Recher: Signatures of nonlocal Cooper-pair transport and of a singlet-triplet transition in the critical current of a double-quantum-dot Josephson junction. Phys. Rev. B 94, 155445 (2016); http://dx.doi.org/10.1103/PhysRevB.94.155445

P. Struszewski, M. Bieler: Characterization of high-speed photodetectors using a laser-based vector network analyzer. Conference on Precision Electromagnetic Measurements (CPEM 2016), Ottawa, Canada; http://dx.doi.org/10.1109/CPEM.2016.7540614

P. C. Nickels, B. Wünsch, P. Holzmeister, W. Bae, L. M. Kneer, D. Grohmann, P. Tinnefeld, T. Liedl: Molecular force spectroscopy with a DNA origami–based nanoscopic force clamp. Science 354 (6310), 305-307 (2016); http://dx.doi.org/10.1126/science.aah5974

E. A. Hemmig, C. Creatore, B. Wünsch, L. Hecker, P. Mair, M. A. Parker, S. Emmott, P. Tinnefeld, U. F. Keyser, A. W. Chin: Programming light-harvesting efficiency using DNA origami. Nano Lett 16 (4), 2369-2374 (2016); http://dx.doi.org/10.1021/acs.nanolett.5b05139

W. Liu, B. Naydenov, S. Chakrabortty, B. Wünsch, K. Hübner, S. Ritz, H. Cölfen, H. Barth, K. Koynov, Haoyuan Qi, R. Leiter, R. Reuter, J. Wrachtrup, F. Boldt, J. Scheuer, U. Kaiser, M. Sison, T. Lasser, P. Tinnefeld, F. Jelezko, P. Walther, Y. Wu, T. Weil: Fluorescent Nanodiamond-Gold Hybrid Particles for Multimodal Optical and Electron microscopy Cellular Imaging. Nano Lett. 16 (10), 6236-6244 (2016), http://dx.doi.org/10.1021/acs.nanolett.6b02456.

 

» 2015

S. Herbrich, T. Al-Hadhuri, K.-H. Gericke, P. S. Shternin, A. G. Smolin, O. S. Vasyutinskii: Two-color two-photon excited fluorescence of indole: Determination of wavelength-dependent molecular parameters. The Journal of Chemical Physics 142, 024310 (2015); http://dx.doi.org/10.1063/1.4905140

S. Herbrich, T. Al-Hadhuri, K.-H. Gericke, P. S. Shternin, A. G. Smolin, O. Vasyutinskii: Determination of wavelength-dependent molecular parameters, The Journal of Chemical Physics 142, 024310 (2015); http://dx.doi.org/10.1063/1.4905140

S. Herbrich, T. Al-Hadhuri, K. H. Gericke, P. S. Shternin, A. G. Smolin, O. S. Vasyutinskii: Two-color two-photon excited fluorescence of indole: Determination of wavelength-dependent molecular parameters. The Journal of chemical physics 142(2), 024310 (2015); http://dx.doi.org/10.1063/1.4905140

M. W. G. Hoffmann, O. Casals, A. E. Gad, L. Mayrhofer, C. Fàbrega, L. Caccamo, F. Hernández-Ramirez, G. Lilienkamp, W. Daum, M. Moseler, H. Shen, A. Waag, J. D. Prades: Novel Approaches Towards Highly Selective Self-Powered Gas Sensors. Conference: Eurosensors (120) 2015, Freiburg, Germany; http://dx.doi.org10.1016/j.proeng.2015.08.752

T. Langer, M. Klisch, F. A. Ketzer, H. Jönen, H. Bremers, U. Rossow, T. Meisch, F. Scholz, A. Hangleiter: Radiative and nonradiative recombination mechanisms in nonpolar and semipolar GaInN/GaN quantum wells. Physica Status Solidi (b) 253 (1); 133-139 (2015); http://dx.doi.org/10.1002/pssb.201552353

M. Kruskopf, K. Pierz, S. Wundrack, R. Stosch, T. Dziomba, C-C. Kalmbach, A. Müller, J. Baringhaus, C. Tegenkamp, F. J. Ahlers, H. W. Schumacher: Epitaxial graphene on SiC: modification of structural and electron transport properties by substrate pretreatment. Journal of Physics: Condensed Matter 27, 185303 (2015); http://dx.doi.org/10.1088/0953-8984/27/18/185303

U. Rossow, L. Hoffmann, H. Bremers, E. R. Buß, F. A. Ketzer, T. Langer, A. Hangleiter, T. Mehrtens, M. Schowalter, A. Rosenauer: Indium incorporation processes investigated by pulsed and continuous growth of ultrathin InGaN quantum wells. Journal of Crystal Growth 414, 49-55 (2015); http://dx.doi.org/10.1016/j.jcrysgro.2014.11.040

P. Kar, S. Sardar, S. Ghosh, M. R. Parida, B. Liu, O. F. Mohammed, P. Lemmens, S. K. Pal: Nano surface engineering of Mn2O3 for potential light-harvesting application. J. Mater. Chem. C 3, 8200-8211 (2015); http://dx.doi.org/10.1039/C5TC01475A

S. Sardar, P. Kar, H. Remita, B. Liu, P. Lemmens, S. K. Pal, S. Ghosh: Enhanced Charge Separation and FRET at Heterojunctions between Semiconductor Nanoparticles and Conducting Polymer Nanofibers for Efficient Solar Light Harvesting. Scientific Reports 5, 17313 (2015); http://dx.doi.org/10.1038/srep17313

J. Hartmann, X. Wang, H. Schuhmann, W. Dziony, L. Caccamo, J. Ledig, M. S. Mohajerani, T. Schimpke, M. Bähr, G. Lilienkamp, W. Daum, M. Seibt, M. Straßburg, H.-H. Wehmann, A. Waag: Growth mechanisms of GaN microrods for 3D core–shell LEDs: The influence of silane flow. physica status solidi (a) 212, 2830-2836 (2015); http://dx.doi.org/10.1002/pssa.201532316

I. Jusuk, C. Vietz, M. Raab, T. Dammeyer, P. Tinnefeld: Super-Resolution Imaging Conditions for enhanced Yellow Fluorescent Protein (eYFP) Demonstrated on DNA Origami Nanorulers. Sci. Rep. 5, 14075 (2015); http://dx.doi.org/10.1038/srep14075

A. Schroer, P. Recher: Detection of nonlocal spin entanglement by light emission from a superconducting p-n junction. Phys. Rev. B 92, 054514 (2015); http://dx.doi.org/10.1103/PhysRevB.92.054514

A. Schroer, P. G. Silvestrov, P. Recher: Valley-based Cooper pair splitting via topologically confined channels in bilayer graphene. Phys. Rev. B 92, 241404(R) (2015); http://dx.doi.org/10.1103/PhysRevB.92.241404

A. Puchkova, C. Vietz, E. Pibiri, B. Wünsch, M. S. Paz, G. P. Acuna, P. Tinnefeld: DNA Origami Nanoantennas with over 5000-fold Fluorescence Enhancement and Single-Molecule Detection at 25 μM. Nano Lett. 15 (12), 8354-8359 (2015); http://dx.doi.org/10.1021/acs.nanolett.5b04045

 

» 2014

L. Caccamo, J. Hartmann, C. Fàbrega, S. Estradé, G. Lilienkamp, J. D. Prades, M. W. G. Hoffmann, J. Ledig, A. Wagner, X. Wang, L. Lopez-Conesa, F. Peiró, J. M. Rebled, H.-H. Wehmann, W. Daum, H. Shen, A. Waag: Band Engineered Epitaxial 3D GaN-InGaN Core–Shell Rod Arrays as an Advanced Photoanode for Visible-Light-Driven Water Splitting. ACS Appl. Mater. Interfaces 6 (4), 2235-240 (2014); http://dx.doi.org/10.1021/am4058937

T. Langer, H.-G. Pietscher, F. A. Ketzer, H. Jönen, H. Bremers, U. Rossow, D. Menzel, A. Hangleiter: S shape in polar GaInN/GaN quantum wells: Piezoelectric-field-induced blue shift driven by onset of nonradiative recombination. Phys. Rev. B 90 (20), 205302 (2014); http://dx.doi.org/10.1103/PhysRevB.90.205302

J. D. McNamara, A Behrends, M. S. Mohajerani, A. Bakin, A. Waag, A. A. Baski, M. A. Reshchikov: Surface photovoltage in heavily doped GaN: Si, Zn. AIP Conference Proceedings 1583, 287-291 (2014); http://dx.doi.org/10.1063/1.4865654

X. Wang, J. Hartmann, M. Mandl, M. S. Mohajerani, H.-H. Wehmann, M. Strassburg, A. Waag: Growth kinetics and mass transport mechanisms of GaN columns by selective area metal organic vapor phase epitaxy. Journal of Applied Physics 115, 163104 (2014); http://dx.doi.org/10.1063/1.4871782

X. Wang, J. Hartmann, M. Mandl, M. S. Mohajerani, H.-H. Wehmann, M. Strassburg, A. Waag: Growth kinetics and mass transport mechanisms of GaN columns by selective area metal organic vapor phase epitaxy. Journal of Applied Physics 115 (16), 163104 (2014); http://dx.doi.org/10.1063/1.4871782

M. Raab, J. J. Schmied, I. Jusuk, C. Forthmann, P. Tinnefeld: Fluorescence microscopy with 6 nm resolution on DNA origami. ChemPhysChem 15 (12), 2431-2435 (2014); http://dx.doi.org/10.1002/cphc.201402179

M. Raab, J.J. Schmied, I. Jusuk, C. Forthmann, P. Tinnefeld: Fluorescence Microscopy with 6 nm Resolution on DNA Origami. ChemPhysChem 15 (12), 2431-2435 (2014); http://dx.doi.org/10.1002/cphc.201402179

S. Beater, M. Raab, P. Tinnefeld: Toward quantitative fluorescence microscopy with DNA origami nanorulers. Methods in Cell Biology 123, 449-466 (2014); http://dx.doi.org/10.1016/B978-0-12-420138-5.00024-0

J. J. Schmied, M. Raab, C. Forthmann, E. Pibiri, B. Wünsch, T. Dammeyer, P. Tinnefeld: DNA origami based standards for quantitative fluorescence microscopy. Nature Prot. 9, 1367-1391 (2014); http://dx.doi.org/10.1038/nprot.2014.079

A. Schroer, B. Braunecker, A. L. Yeyati, P. Recher: Detection of Spin Entanglement via Spin-Charge Separation in Crossed Tomonaga-Luttinger Liquids. Phys. Rev. Lett. 113, 266401 (2014); http://dx.doi.org/10.1103/PhysRevLett.113.266401

P. Holzmeister, B. Wünsch, A. Gietl, P. Tinnefeld: Single-molecule photophysics of dark quenchers as non-fluorescent FRET acceptors. Photochem. & Photobiol. Sci. 13, 853-858 (2014); http://dx.doi.org/10.1039/C3PP50274K.

 

» 2013/2012

T. Al-Hadhuri, K.-H. Gericke, N. Lämmerhardt, P. Mischnick: Investigation of DNA hybridization using time-resolved fluorescence anisotropy, 13th Conference on Methods and Applications of Fluorescence, Genoa, Italian (2013)

N. Lämmerhardt, St. Merzsch, J. Ledig, F. Meyer, M. Tornow, A. Waag, P. Mischnick: Towards Three-Dimensional Microelectronic Systems: DNA Functionalization of Semiconductor Surfaces and Self-Assembly of Silicon Microcubes. Langmuir 29, 8410-8416 (2013); http://dx.doi.org/10.1021/la401558f

S. Li, X. Wang, M. S. Mohajerani, S. Fündling, M. Erenburg, J. Wei, H.-H. Wehmann, A. Waag, M. Mandl, W. Bergbauer, M. Straßburg: Dependence of N-polar GaN rod morphology118 Publications and presentations on growth parameters during selective area growth by MOVPE. Journal of Crystal Growth 364, 149154 (2013); http://dx.doi.org/10.1016/j.jcrysgro.2012.11.027

M. A. Reshchikov, J. D. McNamara, M. S. Mohajerani, A. Behrends, A. Bakin, S. Kück, A. Waag: Higher than 90% internal quantum efficiency of photoluminescence in GaN:Si,Zn. physica status solidi (c) 10, 507-510 (2013); http://dx.doi.org/10.1002/pssc.201200664

X. Wang, S. Li, M. S. Mohajerani, J. Ledig, H.-H. Wehmann, M. Mandl, M. Strassburg, U. Steegmüller, U. Jahn, J. Lähnemann, H. Riechert, I. Griffiths, D. Cherns, A. Waag: Continuous-Flow MOVPE of Ga-Polar GaN Column Arrays and Core Shell LED Structures. Crystal Growth & Design 13, 3475-3480 (2013); http://dx.doi.org/10.1021/cg4003737

M. S.Mohajerani, M. A. Reshchikov, A. Behrends, A. Bakin, S. Kück, A. Waag: Determination of zinc concentration in GaN:Zn,Si from photoluminescence. physica status solidi (c) 10, 523-526 (2013); http://dx.doi.org/10.1002/pssc.201200669

M. Nazir Tahir, N. Lämmerhardt, P. Mischnick: Introduction of various functionalities into polysaccharides using alkynyl ethers as precursors: pentynyl dextrans. Carbohydr. Pol. 88, 154-164 (2012); http://dx.doi.org/10.1016/j.carbpol.2011.11.082

 

Contact

 

Prof. Dr. Meinhard Schilling
Speaker
Institut für Elektrische Messtechnik und Grundlagen der Elektrotechnik
Tel.: +49 531-391-3866 

 

Anna Hellriegel
Secretary

Graduiertenkolleg "Metrology for Complex Nanosystems"

Technische Universität Braunschweig
Hans-Sommer-Straße 66
D-38106 Braunschweig

Tel.: +49 531-391-3810

E-Mail: a.hellriegel@tu-braunschweig.de 

Dates

21.03.2019 | full-time
Location: PTB | Braunschweig
Silicon Photonics
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22.03.2019 | full-time
Location: PTB | Braunschweig
Diamond Photonics
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  last changed 21.01.2019
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