一维α-Fe_2O_3纳米结构的简单热氧化法制备及其场发射特性  

Field Emission Properties of One-dimensional α-Fe_2O_3 Nanostructures Synthesized by Simple Thermal Oxidation

作　　者：钟明龙[1,2] 

机构地区：[1]江西理工大学工程研究院,赣州341000 [2]华南理工大学材料科学与工程学院,广州510640

出　　处：《材料导报（纳米与新材料专辑）》2015年第1期31-33,52,共4页

基　　金：江西省教育厅青年科学基金(GJJ14442)

摘　　要：采用简单的电热板在空气气氛中、430℃加热氧化Fe片以及沉积在硅基片上的Fe膜,在Fe基体表面分别制备出了一维α-Fe2O3纳米线和纳米带,并研究了不同Fe基体热氧化制备的纳米结构的场发射特性。结果表明:Fe片和Fe膜热氧化获得的α-Fe2O3纳米结构的开启电场分别为14.5V/μm和13.3V/μm;α-Fe2O3纳米线和纳米带的增强因子β分别为1529和427,场发射增强因子β的显著差别是由于纳米线和纳米带发射体尖端的形貌、长度直径比值以及样品表面纳米结构阵列的致密度不同造成的。One-dimensional α-Fe2O3 nanostructures, nanowires and nanobelts, were synthesized by heating the Fe foil and Fe film on silicon substrate in air at 430 ℃, respectively, using a very simple hotplate technique. The field emission properties based on different iron substrates were studied. The turn-on field of α-Fe2O3 based on Fe foil and Fe film were 14.5 V/μm and 13.3 V/μm, respectively. The field emission enhancement factor of α-Fe2O3 nanowires and nanobelts were 1529 and 427, which up to the tip shape, the ratio of length to diameter and appropriate density of the emitters.

关 键 词：三氧化二铁 纳米线 纳米带 场发射 

分 类 号：TB383[一般工业技术—材料科学与工程]