通过在硅和石英上进行微球光刻制备的金岛上生长氧化锌纳米棒。

Zinc oxide nanorod growth on gold islands prepared by microsphere lithography on silicon and quartz.

作者信息

Blackledge Charles W, Szarko Jodi M, Dupont Aurélie, Chan George H, Read Elizabeth L, Leone Stephen R

机构信息

Department of Chemistry, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA.

出版信息

J Nanosci Nanotechnol. 2007 Sep;7(9):3336-9. doi: 10.1166/jnn.2007.652.

DOI:10.1166/jnn.2007.652

PMID:18019171

Abstract

Gold islands, vapor deposited on silicon and quartz by microsphere lithography patterning, are used to nucleate arrays of ZnO nanorods. ZnO is grown on approximately 0.32 microm2 Au islands by carbothermal reduction in a tube furnace. Scanning electron microscopy (SEM) and energy dispersive atomic X-ray spectroscopy (EDS) confirm that the gold effectively controls the sites of nucleation of ZnO. Atomic force microscopy (AFM) shows that approximately 30 nm diameter nanorods grow horizontally, along the surface. Alloy droplets that are characteristic of the vapor-liquid-solid (VLS) mechanism are observed at the tips of the nanorods. The spatial growth direction of VLS catalyzed ZnO nanorods is along the substrate when they nucleate from gold islands on silicon and quartz. The energy of adhesion of the VLS droplet to the surface can account for the horizontal growth.

摘要

通过微球光刻图案化气相沉积在硅和石英上的金岛，用于使ZnO纳米棒阵列成核。通过在管式炉中进行碳热还原，在约0.32平方微米的金岛上生长ZnO。扫描电子显微镜（SEM）和能量色散原子X射线光谱（EDS）证实，金有效地控制了ZnO的成核位点。原子力显微镜（AFM）显示，直径约30 nm的纳米棒沿表面水平生长。在纳米棒的尖端观察到了气-液-固（VLS）机制特有的合金液滴。当VLS催化的ZnO纳米棒从硅和石英上的金岛成核时，其空间生长方向沿着基底。VLS液滴与表面的粘附能可以解释水平生长的原因。