TY - JOUR
T1 - Controlled Synthesis and Flexible Self-Assembly of Monodisperse Au@Semiconductor Core/Shell Hetero-Nanocrystals into Diverse Superstructures
AU - Huang, Liu
AU - Zheng, Jiaojiao
AU - Huang, Lingling
AU - Liu, Jia
AU - Ji, Muwei
AU - Yao, Yuan
AU - Xu, Meng
AU - Liu, Jiajia
AU - Zhang, Jiatao
AU - Li, Yadong
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/3/14
Y1 - 2017/3/14
N2 - Monodisperse nonepitaxially grown Au@MX (MX = Ag2S, ZnS, or CdS) core/shell hetero-nanocrystals (HNCs) with controlled crystallinity, composition, anisotropically shaped Au cores but isotropic overall morphologies were successfully prepared. By using C18 acid/alkali co-capping surface ligands, the as-prepared Au@MX HNCs can self-assemble into large-scale two-dimensional monolayer and three-dimensional multilayer superlattices (SLs) on both flexible (graphene) and rigid (Si wafer or glass) substrates. Moreover, unprecedented binary nanocrystal SLs can be achieved through synergistic self-assembly of Au@MX HNCs together with Au NCs (or CdS NCs) into different intricate patterns. Experimental evidence and finite-element method theoretical simulations indicate that the Au@CdS HNC SL film taking up a closest-packing mode has a rate of photocurrent generation much higher than that of its disordered-assembled counterpart, probably because of the enhanced plasmon-exciton coupling permitted by the large-scale ordered nanopatterning.
AB - Monodisperse nonepitaxially grown Au@MX (MX = Ag2S, ZnS, or CdS) core/shell hetero-nanocrystals (HNCs) with controlled crystallinity, composition, anisotropically shaped Au cores but isotropic overall morphologies were successfully prepared. By using C18 acid/alkali co-capping surface ligands, the as-prepared Au@MX HNCs can self-assemble into large-scale two-dimensional monolayer and three-dimensional multilayer superlattices (SLs) on both flexible (graphene) and rigid (Si wafer or glass) substrates. Moreover, unprecedented binary nanocrystal SLs can be achieved through synergistic self-assembly of Au@MX HNCs together with Au NCs (or CdS NCs) into different intricate patterns. Experimental evidence and finite-element method theoretical simulations indicate that the Au@CdS HNC SL film taking up a closest-packing mode has a rate of photocurrent generation much higher than that of its disordered-assembled counterpart, probably because of the enhanced plasmon-exciton coupling permitted by the large-scale ordered nanopatterning.
UR - http://www.scopus.com/inward/record.url?scp=85015702406&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.7b00046
DO - 10.1021/acs.chemmater.7b00046
M3 - Article
AN - SCOPUS:85015702406
SN - 0897-4756
VL - 29
SP - 2355
EP - 2363
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 5
ER -