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Substituent effects on charge transport in films of Au nanocrystals
Gemma L Stansfield1, P John Thomas
1School of Chemistry, Oxford Road, The University of Manchester, Manchester M139PL, UK.
Abstract:
Charge transport (CT) in films of arylthiol-capped Au nanocrystals (NCs) exhibits strong substituent effects, with electron-donating substituents markedly decreasing conductivity. Films suited for measurements were obtained by ligand-exchange reactions on AuNCs grown at the water/toluene interface. Detailed analysis suggests the NCs interact with the ligands by resonance rather than inductive effects. The films were characterized by TEM, SEM, XPS, UV/vis, and AFM. CT characteristics were studied between 15 and 300 K.
