@article{bc156898d62146d0b3e13d651c3ec1ab,
title = " Influence of hydrogen incorporation on conductivity and work function of VO 2 nanowires ",
abstract = " We report improved conductance by reducing the work function via incorporation of hydrogen into VO 2 nanowires. The VO 2 nanowires were prepared using the chemical vapor deposition method with V 2 O 5 powder on silicon substrates at 850 °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 VO 2 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 VO 2 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 VO 2 NWs, including the conductance and work function, can be achieved by incorporating hydrogen at relatively moderate temperatures.",
author = "Park, {Jeong Young} and Kim, {Jae Eun} and Shin, {Jung Yeol} and Jang, {Hyun Seok} and Jeon, {Jun Woo} and Hong, {Won G.} and Kim, {Hae Jin} and Junhee Choi and Kim, {Gyu Tae} and Kim, {Byung Hoon} and Jonghyurk Park and Choi, {Young Jin}",
note = "Funding Information: This work was supported by the Institute for Basic Science (IBS) [IBS-R004]. This research was also supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science and ICT (NRF-2014M3C1A3053029). B. H. K was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2017R1A6A1A06015181 and NRF-2017R1A1A1A05000789). In addition, this research was financially supported by the Ministry of Trade, Industry and Energy (MOTIE) and the Korea Institute for Advancement of Technology (KIAT) through the International Cooperative R&D program (grant no. N0001819) and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2017K1A3A1A19070288). Publisher Copyright: {\textcopyright} 2019 The Royal Society of Chemistry.",
year = "2019",
month = mar,
day = "14",
doi = "10.1039/c9nr00245f",
language = "English",
volume = "11",
pages = "4219--4225",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "10",
}