V2O5 precursor-templated synthesis of textured nanoparticles based VN nanofibers and their exploration as efficient field emitter

被引：20
作者：
Dewangan, Khemchand [1 ]
Patil, Girish P. [3 ]
Kashid, Ranjit V. [2 ]
Bagal, Vivekanand S. [3 ]
More, M. A. [2 ]
Joag, D. S. [2 ]
Gajbhiye, N. S. [4 ]
Chavan, Padmakar G. [3 ]
机构：
[1] Indira Gandhi Natl Tribal Univ Amarkantak, Dept Chem, Amarkantak 484886, Madhya Pradesh, India
[2] Univ Pune, Ctr Adv Studies Mat Sci & Condensed Matter Phys, Dept Phys, Pune 411007, Maharashtra, India
[3] North Maharashtra Univ Jalgaon, Sch Phys Sci, Dept Phys, Umavinagar 425001, Maharashtra, India
[4] Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India
来源：
VACUUM | 2014年 / 109卷
关键词：
Synthesis; Field emission; Current stability; EMISSION; VANADIUM; NANOSTRUCTURES; NANOPOWDERS; NANOTUBES; CAGES;
D O I：
10.1016/j.vacuum.2014.07.027
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Textured Vanadium Nitride (VN) nanofibers are prepared from hydrothermally derived V2O5 nanofibers by NH3 reduction and nitridation approach. The reaction temperature is seen to be a crucial parameter to prepare pure VN phase. VN produced via this route has distinctive structural characteristics. The crystal structure, morphology, and oxidation states of the elements of VN nanofibers are characterized by XRD, FESEM, TEM, HRTEM, and XPS studies. Field emission properties for these textured VN nanofibers have been explored. The field emission properties show the reproducible turn-on field of 3.4 V/mu m for the emission current density of 10 mu A/cm(2). The observed turn-on field is found to be quite superior compare to carbide, nitride and oxide nanostructures. High emission current density of 44 mu A/cm(2) has been found at a field of 4 V/mu m. Emission current stability for the preset current of 5 mu A has been recorded for the period of 2 h. Present results indicate the considerable potential for the utilizing VN nanofibers as a cold cathode in the field emitter devices. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：223 / 229
页数：7
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