This is a part of the
of the TU Braunschweig together with the PTB: Physikalisch-Technische Bundesanstalt
DFG: German Science Foundation,
Announcement from 12.05.2014
•40 joint PhD sucessful in all topics of metrology
•6 years of joint
Metrology: Lecture cycle covering 3 years
•Topical courses at
weekend for up to 12 students
•Field trips to
research areas in „NanoMet“
methods to be applied to metrological tasks in PhD projects.
-> quantum normals
Focus of the AG Lemmens: Optical spectroscopy, nanostructured matter,
light-matter interaction, electronic correlations
Initial project descriptions:
Anodic Aluminium Oxidation Patterns for Dimensional Metrology, Bosse/Lemmens
- within the research field: Complex measurands with multiparametric
Electrochemical and deposition techniques will be used to establish periodic and transmis-
sive hole arrays on the nanoscale using principles of self-organization to
establish a repro-
ducible route to cost efficient nanostructures with spatially varying physical
metrological purposes. The AAO patterns will be investigated with respect to
properties by traceable high resolution microscopy techniques based on suitable
signal modelling and high precision interferometry with sub-nm uncertainty.
Combined surface enhanced and isotope dilution Raman spectroscopy for the
quantification of macromolecular clinical markers, Güttler/Lemmens
- within the research field: Complex measurands in biological nanosystems
with non-ergodic, multimodal,
The potential of vibrational spectroscopy will be exploited as a tool to detect,
quantify large biomolecules and their isotopologues on an SI-traceable basis.
be achieved by Isotope-dilution surface enhanced Raman spectroscopy (IDSERS).
method can be used as an alternative approach for a primary ratio method to
tional Standards for clinical markers at the highest level of accuracy in a
similar way as
isotope dilution mass spectrometry (IDMS). IDSERS is not restricted to the
resolution of IDMS and also sensitive to distinguish structural modifications of
These properties are specifically valuable for the identification and
quantification of large
biomolecules. The work aims at a metrological measurement concept including
evaluation for large biomolecules using IDSERS.
Previous relevent publications of our group (from the
A. Makhal, S. Sarkar and S. Pal, H.-D. Yan, D. Wulferding, F. Cetin, P Lemmens:
Ultrafast excited state deactivation of doped porous anodic alumina membranes,
Nanotechnology 23, 305705 (2012).
M. F. Cetin, P Lemmens, V. Gnezdilov, D. Wulferding, D. Menzel, T. Takayama, K.
H. Takagi: Crossover from coherent to incoherent scattering in the spin orbit
Sr 2 IrO 4 , Phys. Rev. B 85, 195148 (2012).
H.-D. Yan, P Lemmens, D. Wulferding, J. Shi, K. D. Becker, C. T. Lin, A. Lak, M
Tailoring defect structure and optical absorption of porous anodic aluminum
branes, Journ. Mat. Chem. Phys., 135, 206 (2012).
K.-Y. Choi, Zh. Wang, H. Nojiri, H. v. Tol, P. Kumar, P Lemmens, U. Kortz, N. S.
Coherent Manipulation of Electron Spins in Cu3 Spin Triangle Molecule Deposited
Nanoporous Silicon, Phys. Rev. Lett., 108, 067206 (2012).
H.-D. Yan, P Lemmens, J. Ahrens, M. Bröring, S. Burger, W. Daum, G. Lilienkamp,
S. Korte, A. Lak, M Schilling: High-density array of Au nanowires coupled by plasmon modes,
Acta Phys. Sin. 61, No. 23, 237105 (2012).
A. Makhal, H.-D. Yan, P Lemmens and S.K. Pal:
Light Harvesting Semiconductor Core-Shell Nanocrystal: Ultrafast Charge
Dynamics of CdSe-ZnS Quantum Dots, J. Phys. Chem. C 114, 627 (2010).
S. Pal, R.K. Mitra, P.K. Verma, D. Wulferding, D. Menzel, T. Mitra, A.M. Todea,
mens, A. Müller: A Molecular Magnet confined in the Nanocage of a Globular
ChemPhysChem 11, 389 (2010).
P. Kumar, P Lemmens, M. K. Ghosh, F. Ludwig, M Schilling:
Effect of HF concentration on physical and electronic properties of
formed nano-porous silicon, Journ. of Nanomaterials, 728957 (2009).
H.D. Yan, P Lemmens, H. Dierke, S.C. White, F. Ludwig, M Schilling:
Iron/Nickel nanowire growth in Anodic Aluminum Oxide templates: Transfer of
scales and periodicity, Journ. Phys.: Conf. Series 145, 012079 (2009).