Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 121, Issue 44, Pages 24877-24885Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.7b08946
Keywords
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Funding
- Guangdong Natural Science Funds for Distinguished Young Scholars [2015A030306044]
- Guangdong-Hong Kong joint innovation project [2016A050503012]
- National Natural Science Foundation of China [51406075, 51402147]
- National Key Research and Development Project from the Ministry of Science and Technology [2016YFA0202400, 2016YFA0202404]
- Training Program for Outstanding Young Teachers at Higher Education Institutions of Guangdong Province [YQ2015151]
- Foundation of Shenzhen Science and Technology Innovation Committee [JCYJ20150331101823695]
- Peacock Team Project from Shenzhen Science and Technology Innovation Committee [KQTD2015-033110182370]
- Southern University of Science and Technology
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Temperature measurement is critical for many scientific experiments and technological applications. Diverse thermometers have been developed for the thermal sensing at macroscopic length scales. However, in situ and quantitative temperature measurement of nanoscale-objects in a convenient approach is still a challenge. Here, we demonstrate a new type of optically readable VO2 nanowire-based thermometer, based on the unique axial gradient phase transition behavior along single-domain VO2 nanowires, which is attributed to the hydrogen doping of single-crystalline VO2 nanowires through hydrothermal fabrication and the hydrogen engineering via a postannealing process. Besides the appropriate microscopic size and user-friendly operation, the as-prepared optically readable VO2 nanowire-based thermometers have ultrahigh relative sensitivity (similar to 17.4%/K) and temperature resolution (similar to 0.026 K), enabling the sensitive monitoring of the thermal environment of small spaces or the temperature of even nanoscale structures.
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