超声辅助在石墨烯模板上合成高纵横比金纳米线及其生长机制研究

Ultrasonication-assisted synthesis of high aspect ratio gold nanowires on a graphene template and investigation of their growth mechanism.

作者信息

Xin Wenbo, De Rosa Igor M, Cao Yang, Yin Xunqian, Yu Hang, Ye Peiyi, Carlson Larry, Yang Jenn-Ming

机构信息

Department of Materials Science and Engineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, California 90095, USA. kevin.xwsu.gmail.com.

出版信息

Chem Commun (Camb). 2018 Apr 19;54(33):4124-4127. doi: 10.1039/c8cc01727a.

DOI:10.1039/c8cc01727a

PMID:29623328

Abstract

We report a facile synthesis of Au nanowires (AuNWs) with a high aspect ratio (l/D) of up to 5000 on a plasma activated graphene template with ultrasound assistance. We demonstrate that the ultrasonication induced symmetry breaking of Au clusters facilitates the growth of AuNWs from the embryonic stages. Furthermore, the growth mechanism of AuNWs is systematically investigated using high resolution electron transmission microscopy (HRTEM), which reveals the unique role of the defective graphene template in directing the growth of AuNWs.

摘要

我们报道了一种在超声辅助下，于等离子体活化的石墨烯模板上简便合成高纵横比（长径比l/D）高达5000的金纳米线（AuNWs）的方法。我们证明，超声处理诱导的金团簇对称性破缺有助于金纳米线从胚胎阶段开始生长。此外，利用高分辨率电子透射显微镜（HRTEM）系统地研究了金纳米线的生长机制，这揭示了有缺陷的石墨烯模板在引导金纳米线生长中的独特作用。