Circular Dichroism of Electric-Field-Oriented CdSe/CdS Quantum Dots-in-Rods.

Autor: Mukhina MV; Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia., Baimuratov AS; Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia., Rukhlenko ID; Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia.; Monash University, Clayton Campus , Victoria 3800, Australia., Maslov VG; Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia., Purcell Milton F; School of Chemistry and CRANN Institute, Trinity College, Dublin , Dublin 2, Ireland., Gun'ko YK; Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia.; School of Chemistry and CRANN Institute, Trinity College, Dublin , Dublin 2, Ireland., Baranov AV; Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia., Fedorov AV; Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia.
Jazyk: angličtina
Zdroj: ACS nano [ACS Nano] 2016 Sep 27; Vol. 10 (9), pp. 8904-9. Date of Electronic Publication: 2016 Aug 29.
DOI: 10.1021/acsnano.6b04875
Abstrakt: Here we report anisotropy of intrinsic chiroptical response in CdSe/CdS quantum dot-in-rod systems. These nanostructures being oriented in an external electric field demonstrate dependence of circular dichroism signal on the orientation of the nanocrystals. The type of circular polarization in these nanostructures correlates with preferential direction of linear polarization, and the degree of circular polarization is the maximal for the first circular dichroism band corresponding to the absorption band edge. We also support our experimental data with a theoretical model. Using this model, we show a direct connection between theoretically derived morphological parameters of twisting in nanocrystals lattices and calculated from experimental data parameters of circular dichroism anisotropy.
Databáze: MEDLINE
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