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.

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.
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 „QuantumFrontiers“ der Wissenschaftsallianz Hannover-Braunschweig hat erfolgreich die erste Runde der gemeinsamen Exzellenzstrategie 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
An international team of researchers from the University of California, Los Angeles and the Braunschweig University of Technology in Germany has developed an approach to enhance the sensitivity of smartphone-based fluorescence microscopes by ten-fold compared to previously reported mobile phone-based handheld microscopes. This is an important development toward the use of mobile phones for advanced microscopic investigation of samples, sensing of disease biomarkers, tracking of chronic conditions, and molecular diagnostics and testing in general.

[ 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

Research Center "Laboratory for Emerging Nanometrology"


The research center LENA is focusing on the development and application of nanometrology – precise measurements at the nanometer scale – to enable and support novel science and applications in nanotechnology.

LENA performs interdisciplinary fundamental research from synthesis, analytics and theory of nanomaterials to nanotechnological applications. Its scientific activities can be grouped into three core research areas:

  • Precise characterizations of nanomaterials and 3D-nanosystems with assessment of measurement uncertainties and retraceability of measurands to SI units.
  • Improvement of nanoanalytics for continuously enhanced sensitivity and precision of the applied methods.
  • Development of ubiquitous sensors, for example, to detect nanoparticles or exploit the unique properties of nanomaterials to build small ultra-sensitive sensors for various applications like biomedical diagnostics or environmental online monitoring, or nano-standards that can serve as points of reference for calibrations everywhere.

As a nano-analytics center par excellence LENA will be equipped with a unique combination of high-end instrumentation. High-resolution imaging methods, spatially and temporally resolved spectroscopy, surface manipulation and analytics as well as particle property measurement instrumentation will be operated by the expert member groups of LENA.

LENA – one of the Carolo-Wilhelmina research centers of Technische Universität Braunschweig (TU-BS) – combines research activities of 12 groups from TU-BS and 8 groups of the Physikalisch Technische Bundesanstalt (PTB) Braunschweig, including electricalengineering, semiconductor-, microsystems-, and particle-technology, physics, chemistry, optics, production measurement technology and more, to enable interdisciplinary research in the field of nanometrology, being one of the key research areas of TU-BS. LENA, being part of the “Metrology Initiative Braunschweig” (MIB) pooling further joint metrology activities like joint TU-BS/PTB appointments and graduate education programs, will also include several junior research groups.



vergrößerte Darstellung



  • Nanonormale

  • Methodenentwicklung

  • Ubiquitäre Sensoren und Standards


Further Research Projects

To the discription of further selected research projects

Participating Research Groups


Beteiligte Institute der TU Braunschweig

Fakultät 2 | Lebenswissenschaften

Fakultät 4 | Maschinenbau

Fakultät 5 | Elektrotechnik, Informationstechnik, Physik

Joint Appointments with the PTB

Fakultät 5 | Elektrotechnik, Informationstechnik, Physik/PTB


Beteiligte Fachabteilungen der PTB

Abteilung 2 | Elektrizität mehr

Abteilung 3 | Chemische Physik und Explosionsschutz mehr

Abteilung 4 | Optik mehr

Abteilung 5 | Fertigungsmesstechnik mehr


Selected Publications

You'll find even more publications on our member's websites.


» 2017

Q. Wei, G. Acuna, S. Kim, C. Vietz, D. Tseng, J. Chae, D. Shir, W. Luo, P. Tinnefeld, A. Ozcan: Plasmonics Enhanced Smartphone Fluorescence Microscope, Scientific Reports 7, Article number: 2124 (2017), DOI: 10.1038/s41598-017-02395-8

M. Raab, F. Stefani, G.P. Acuna, P. Tinnefeld (2016): Shifting Molecular Localization by Plasmonic Coupling in a Single-Molecule Mirage, Nature Commun., 2017


» 2016

P.C. Nickels, B. Wünsch, P. Holzmeister, W. Bae, L.M. Kneer, D. Grohmann, P. Tinnefeld, T. Liedl (2016): Molecular Force Spectroscopy with a DNA Origami Based Nanoscopic Force Clamp, Science, 354, 6310, 305–307.

I. Masthoff, M. Kraken, D. Menzel, F. J. Litterst, G. Garnweitner: Study of the growth of hydrophilic iron oxide nanoparticles obtained via the non-aqueous sol–gel method, J. Sol-Gel Sci. Technol., 2016, 77, 553–564.

S. Zellmer, M. Lindenau, S. Michel, G. Garnweitner, C. Schilde: Influence of surface modification on structure formation and micromechanical properties of spray-dried silica aggregates, J. Colloid Interf. Sci., 2016, 464, 183–190.

T. Wahl, S. Zellmer, J. Hanisch, G. Garnweitner, E. Ahlswede, Thin indium tin oxide nanoparticle films as hole transport layer in inverted organic solar cells, Thin Solid Films, 2016, 616, 419–424.

P. Stolzenburg, A. Freytag, N. C. Bigall, G. Garnweitner: Fractal growth of ZrO2 nanoparticles induced by synthesis conditions, CrystEngComm, 2016, 18, 8396–8405.

M. Zimmermann, K. Ibrom, P. G. Jones, G. Garnweitner: Formation of a dimeric precursor intermediate during the nonaqueous synthesis of titanium dioxide nanocrystals, ChemNanoMat, 2016, online, DOI 10.1002/cnma.201600264.

A. Gad, M. W. G. Hoffmann, O. Casals, L. Mayrhofer, C. Fàbrega, L. Caccamo, F. Hernández-Ramírez, M. S. Mohajerani, M. Moseler, H. Shen, et al.:
Integrated Strategy toward Self-Powering and Selectivity Tuning of Semiconductor Gas Sensors
ACS Sensors, 09/2016. DOI: 10.1021/acssensors.6b00508

J. Hartmann, F. Steib, H. Zhou, J. Ledig, S. Fündling, F. Albrecht, T. Schimpke, A. Avramescu, T. Varghese, H.-H. Wehmann, M. Straßburg, H.-J. Lugauer, and A. Waag:
High Aspect Ratio GaN Fin Microstructures with Nonpolar Sidewalls by Continuous Mode Metalorganic Vapor Phase Epitaxy,
Cryst. Growth Des., vol. 16, no. 3, pp. 1458–1462, Mar. 2016.

T. Schimpke, H.-J. Lugauer, A. Avramescu, T. Varghese, A. Koller, J. Hartmann, J. Ledig, A. Waag, and M. Strassburg:
Position-controlled MOVPE growth and electro-optical characterization of core-shell InGaN/GaN microrod LEDs,
in Proc. SPIE 9768, 2016, p. 97680T

M. S. Mohajerani, S. Khachadorian, T. Schimpke, C. Nenstiel, J. Hartmann, J. Ledig, A. Avramescu, M. Strassburg, A. Hoffmann, and A. Waag:
Evaluation of local free carrier concentrations in individual heavily-doped GaN:Si micro-rods by micro-Raman spectroscopy,
Appl. Phys. Lett., vol. 108, no. 9, p. 091112, Feb. 2016.

M. Abdelfatah, J. Ledig, A. El-Shaer, A. Wagner, V. Marin-Borras, A. Sharafeev, P. Lemmens, M. M. Mosaad, A. Waag, and A. Bakin:
Fabrication and characterization of low cost Cu2O/ZnO:Al solar cells for sustainable photovoltaics with earth abundant materials,
Sol. Energy Mater. Sol. Cells, vol. 145, pp. 454–461, Feb. 2016.

M. Abdelfatah, J. Ledig, A. El-Shaer, A. Sharafeev, P. Lemmens, M. M. Mosaad, A. Waag, and A. Bakin:
Effect of Potentiostatic and Galvanostatic Electrodeposition Modes on the Basic Parameters of Solar Cells Based on Cu2O Thin Films,
ECS J. Solid State Sci. Technol., vol. 5, no. 6, pp. Q183–Q187, Apr. 2016.

A. Glamazda, P. Lemmens, S.-H. Do, Y.S. Choi & K.-Y. Choi:
Raman spectroscopic signature of fractionalized excitations in the harmonic-honeycomb iridates β- and γ-Li2IrO3
Nature Communications 7, Article number: 12286, 2016. DOI: 10.1038/ncomms12286

J. Ledig, S. Fündling, F. Steib, J. Hartmann, H.-H. Wehmann, and A. Waag:
Electro-optical characterization of 3D-LEDs - Nondestructive inspection of 4’' wafers in bird's eye view by an FE-SEM
Imaging & Microscopy, vol. 18, no. 2, p. 44-46, 2016.

Schulz S., Gietl A., Smollett K., Tinnefeld P., Werner F. and Grohmann D. (2016):
TFE and Spt4/5 open and close the RNA polymerase clamp during the transcription cycle.
Proceedings of the National Academy of Sciences U.S.A. DOI: 10.1073/pnas.1515817113

J. Ledig, X. Wang, S. Fündling, H. Schuhmann, M. Seibt, U. Jahn, H.-H. Wehmann, A. Waag:
Characterization of the internal properties of InGaN/GaN core-shell LEDs
Phys. Status Solidi (a), vol. 213, no. 1, pp. 11–18, Jan. 2016. DOI: 10.1002/pssa.201532485


» 2015

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, and A. Waag:
Growth mechanisms of GaN microrods for 3D core-shell LEDs: The influence of silane flow,
Phys. status solidi, vol. 212, no. 12, pp. 2830–2836, Dec. 2015.

M. Abdelfatah, J. Ledig, A. El-Shaer, A. Wagner, A. Sharafeev, P. Lemmens, M. M. Mosaad, A. Waag, and A. Bakin:
Fabrication and characterization of flexible solar cell from electrodeposited Cu2O thin film on plastic substrate,
Sol. Energy, vol. 122, pp. 1193–1198, Dec. 2015.

J. Ledig, S. Fündling, M. Popp, J. Hartmann, H.-H. Wehmann, A. Sperling, and A. Waag:
in Proceedings of CIE Expert Symposium on the CIE S 025 LED Lamps, LED Luminaires and LED Modules Test Standard, 2015, pp. 71–79.

X. Wang, U. Jahn, M. Mandl, T. Schimpke, J. Hartmann, J. Ledig, M. Straßburg, H.-H. Wehmann, and A. Waag:
Growth and characterization of mixed polar GaN columns and core-shell LEDs,
Phys. status solidi, vol. 212, no. 4, pp. 727–731, Apr. 2015.

M. A. Deeb, J. Wei, J. Hartmann, H.-H. Wehmann, and A. Waag, “Surface photovoltage behavior of GaN columns,” Phys. status solidi, vol. 212, no. 4, pp. 732–735, Apr. 2015.

E. R. Buß, P. Horenburg,U. Rossow, H. Bremers, T. Meisch, M. Caliebe, F. Scholz, and A. Hangleiter
Non- and semipolar AlInN one-dimensionally lattice-matched to GaN for realization of relaxed buffer layers for strain engineering in optically active GaN-based devices
Phys. Status Solidi B, 1–7 (2015)

I. Jusuk, C. Vietz, M. Raab, T. Dammeyer, P. Tinnefeld
Super-Resolution Imaging Conditions for Yellow Fluorescent Protein (eYFP) Demonstrated on DNA Origami Nanorulers
Scientific Reports (2015) DOI: 10.1038/srep14075

T. Langer, M. Klisch, F. A. Ketzer, H. Jönen, H. Bremers, U. Rossow, T. Meisch, F. Scholz, and A. Hangleiter
Radiative and nonradiative recombination mechanisms in nonpolar and semipolar GaInN/GaN quantum wells
Phys. Status Solidi B, 1–7 (2015).

I.-C. Masthoff, A. Gutsche, H. Nirschl, G. Garnweitner
Oriented attachment of ultra-small Mn(1−x)ZnxFe2O4 nanoparticles during the non-aqueous sol–gel synthesis
CrystEngComm (2015). DOI: 10.1039/C4CE02068E

Puchkova A., Vietz C., Pibiri E., Wünsch B., Sanz Paz M., Acuna G.P., Tinnefeld P.
DNA Origami Nanoantennas with over 5000-fold Fluorescence Enhancement and Single-Molecule Detection at 25 μM
Nano Letters 11/2015. DOI:10.1021/acs.nanolett.5b04045


» 2014

M. W. G. Hoffmann, L. Mayrhofer, O. Casals, L. Caccamo, F. Hernandez-Ramirez, M. Moseler, A. Waag, H. Shen, J. D. Prades
Highly selective and self-powered gas sensor enabled via organic surface functionalization
Advanced Materials (2014). DOI: 10.1002/adma.201403073.

P. Holzmeister, E. Pibiri, J.J. Schmied, T.Sen, G.P. Acuna, P. Tinnefeld
Quantum yield and excitation rate of single molecules close to metallic nanostructures
Nature Communications (2014), 5:5356. DOI: 10.1038/ncomms6356.

Contact LENA


A. Waag

Speaker of the Management Board

Prof. Dr. Andreas Waag

Institut für Halbleitertechnik




T. Dammeyer

Executive Director

Dr. Thorben Dammeyer
room 216



Research Gate



KD Stegert

LENA Office (Assistance of Executives)

Klaudia Dagmar Stegert

0531-391-3775 (Mon. – Wed. and Thu. a.m.)



KD StegertLENA Office

Silke Feldhusen
room 215

TU Braunschweig
Laboratory for Emerging Nanometrology (LENA)
Langer Kamp 6a/b
D-38106 Braunschweig

0531-391-65300 (Tue. – Fri. a.m.)




05. – 08.08.2019
Location: Kloster Drübeck
Metrological Summer School
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09. – 10.09.2019
Location: LENA | room 003
nextnano: A simulation software for semiconductor nanodevices
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  last changed 18.06.2019
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