Enhanced Field Emission from Vertical ZnO Nanoneedles on Micropyramids

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2009,（3）
• 页码范围: 267-269
• 页数: 3页
• 语种: 英文

摘要

Vertical ZnO nanoneedles with sharp tips are secondarily grown on tips of primarily grown ZnO micropyramids by a vapour transport process.The field emission (FE) properties exhibit a lower turn-on electric fieM and a higher field enhancement factor as compared with vertical ZnO microrods.This result indicates that ZnO nanoneedles have good optimum shapes for FE due to electron accumulation at sharp tips.