Preparation and Field Emission Properties of Titanium Polysulfide Nanobelt Films

作     者：Xing Cai Wu You Rong Tao Qi Xiu Gao 

作者机构：School of Chemistry and Chemical Engineeringand Key Laboratory of Mesoscopic Chemistry of Ministry of EducationNanjingUniversityNanjing 210093China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2009年第2卷第7期

页      面：558-564页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the National Natural Science Foundation of China(No.20671050) National Basic Research Program of China(973 Program,No.2007CB936302) 

主　　题：Nanowire film titanium sulfide chemical vapor-transport field emission 

摘      要：TiS_(3) nanobelt films,with widths of about 0.112μm,thickness of about 20250 nm,and lengths of up to 200μm,have been grown on Ti substrates by a surface-assisted chemical-vapor-transport at 450°C for 8 *** TiS_(3) nanobelt films were converted into TiS_(1.71) nanobelt films by pyrolysis in a vacuum at 600°C for 2 *** work functions of the two films were determined by ultraviolet photoelectron spectroscopy measurements to be 4.60 and 4.44 eV,*** field emission experiments using the nanostructures as cold electron cathodes showed that both materials gave significant emission *** turn-on fields(defined as the electric field required to produce a current density of 10μA/cm^(2))were about 1.0 and 0.9 V/μm,respectively,whereas the threshold fields(defined as the electric field required to produce a current density of 1 mA/cm^(2))were about 5.6 and 4.0 V/μm,*** data reveal that both materials have potential applications in field emission devices.