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We report on photoconduction and optical properties of aligned assemblies of core−shell CdSe/CdS nanorods prepared by a seeded growth approach. We fabricate oriented layers of nanorods by drop casting the nanorods from a solution on substrates with prepatterned, micrometer-spaced electrodes and obtain nanorod alignment due to the coffee stain effect. The photoconductivity of the nanorod layers can be improved significantly by an annealing process under vacuum conditions. The spectral response of the photocurrent shows distinct features that can be assigned to the electronic level structure of the core−shell nanorods and that relate well to the spectra obtained by absorption measurements. We study assemblies of nanorods oriented parallel and perpendicular to the applied electric field by the combined use of photocurrent and photoluminescence spectroscopy. We obtain consistent results which show …
American Chemical Society
Publication date: 
23 Mar 2010

Anna Persano, Milena De Giorgi, Angela Fiore, Roberto Cingolani, Liberato Manna, Adriano Cola, Roman Krahne

Biblio References: 
Volume: 4 Issue: 3 Pages: 1646-1652
Acs Nano