取代基对金纳米晶薄膜中电荷输运的影响。

Substituent effects on charge transport in films of Au nanocrystals.

机构信息

School of Chemistry, Oxford Road, The University of Manchester, Manchester M139PL, UK.

出版信息

J Am Chem Soc. 2012 Jul 25;134(29):11888-91. doi: 10.1021/ja304348y. Epub 2012 Jul 9.

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.

摘要

芳基硫醇封端的金纳米晶体（NCs）薄膜中的电荷输运（CT）表现出强烈的取代基效应，供电子取代基显著降低电导率。通过在水/甲苯界面生长的 AuNCs 上进行配体交换反应，获得了适合测量的薄膜。详细分析表明，NCs 通过共振而不是诱导效应与配体相互作用。通过 TEM、SEM、XPS、UV/vis 和 AFM 对薄膜进行了表征。在 15 至 300 K 之间研究了 CT 特性。