Influence of hydrogen incorporation on conductivity and work function of VO2 nanowires
- Authors
- Kim, Jae-Eun; Shin, Jung Yeol; Jang, Hyun-Seok; Jeon, Jun Woo; Hong, Won G.; Kim, Hae Jin; Choi, Junhee; Kim, Gyu-Tae; Kim, Byung Hoon; Park, Jonghyurk; Choi, Young Jin; Park, Jeong Young
- Issue Date
- 14-3월-2019
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.11, no.10, pp.4219 - 4225
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE
- Volume
- 11
- Number
- 10
- Start Page
- 4219
- End Page
- 4225
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/66666
- DOI
- 10.1039/c9nr00245f
- ISSN
- 2040-3364
- Abstract
- We report improved conductance by reducing the work function via incorporation of hydrogen into VO2 nanowires. The VO2 nanowires were prepared using the chemical vapor deposition method with V2O5 powder on silicon substrates at 850 degrees C. Hydrogenation was carried out using the high-pressure hydrogenation method. Raman spectroscopy confirmed that the incorporated hydrogen atoms resulted in a change in the lattice constant of the VO2 nanowires (NWs). To quantitatively measure the work function of the nanowires, Kelvin probe force microscopy (KPFM) was employed at ambient conditions. We found that the work function decreased with increasing H-2 pressure, which also resulted in increased conductance. This is associated with hydrogen diffused into the VO2 that acts as a donor to elevate the Fermi level, which was also confirmed by KPFM. From these results, tuning of the reversible electrical properties of VO2 NWs, including the conductance and work function, can be achieved by incorporating hydrogen at relatively moderate temperatures.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.