Berlin 2005 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 17: Poster Ib

HL 17.31: Poster

Freitag, 4. März 2005, 16:30–19:00, Poster TU F

Conductivity and preparation of nanowires — •F. Kost¹, T. Kolb¹, A. Pucci¹, M. Jalochowski², V. Hnatyuk^2,3 und G. Fahsold¹ — ¹Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität, 69120 Heidelberg, Germany — ²Institute of Physics, Maria Curie-Sklodowska University, 20031 Lublin, Poland — ³European College of Polish and Ukrainian Universities, 20029 Lublin, Poland

The investigation of metal nanowires is feasible with infrared-spectrometric experiments, which allow analysing these wires in a non-contact mode. Since the wires can be treated as antennas, they show resonances in the mid infrared range. Hence, by measuring the infrared- transmission spectra of nanowires, one can determine various characteristics of the wire. In this regard, size-effects in their conductivity are of special interest. On the basis of model calculations, the measured transmission spectra give information on the dynamic conductivity of the nanowires [1]. In collaboration with the Group of M. Jalochowski (Lublin), we prepare metal nanostructures by evaporating lead on regularly stepped silicon surfaces. Thereby, solid-like nanowires of Pb align parallel to the step edges of the silicon due to self-organization processes. The diameter of such produced single crystalline wires ranges from about 1nm up to few ten nanometers [2].

[1]G. Fahsold and A. Pucci, Adv. in Solid State Physics, Vol. 43, ed. by B. Kramer (Springer, 2003) 833.

[2]M. Jalochowski, M. Strozak, R. Zdyb, Applied Surface Science 211 (2003) 209-215.

Supported by DFG (SPP 1165).