Regensburg 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 54: Transport: Carbon Nanotubes

TT 54.11: Vortrag

Mittwoch, 9. März 2016, 18:00–18:15, H22

Electronic Transport through surface functionalized noble metal nanoparticles: Studied at the single object level — •Tuhin Shuvra Basu, Simon Diesch, and Elke Scheer — Fachbereich Physik, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany

Surface functionalized noble metal nanoparticles exhibit strong plasmonic effects which can be tuned by changing the size of the nanoparticle and by altering the surface functionalization. Additionally due to intraband splitting in ultra-small nanoparticles, they often exhibit weak photoluminescence (PL) [1]. The photo-physics of plasmonics and PL effect are not well understood in ensemble measurements. The understanding of the size and surface effect are essentially important from the further integration of these nanoparticles with other nanosystems to utilize their modified optical properties. In this work, we want to address the size effect of these systems especially weakly coupled gold (Au) nanoparticles by tunneling spectroscopy. Differential conductance of individual noble metal nanoparticles with different temperatures (from mK to K order) shows band-structure fluctuations which can effectively provide signature information of the nanoparticles. We discuss our results in terms of correlations between the electron dynamics, size, surface functionalization and temperature.
S. Eustisa, M. A. El-Sayed, Chem. Soc. Rev. 35, 209 (2006)
J. Zheng, C. Zhou, M. Yua, J. Liua, Nanoscale 4, 4073 (2012).