3 years ago

Axial Modulation of Metal–Insulator Phase Transition of VO2 Nanowires by Graded Doping Engineering for Optically Readable Thermometers

Axial Modulation of Metal–Insulator Phase Transition of VO2 Nanowires by Graded Doping Engineering for Optically Readable Thermometers
Wenkai Ouyang, Pengcheng Chen, Liang Zhang, Xiangbin Cai, Shiyuan Liu, Jingwei Wang, Run Shi, Chun Cheng, Linfei Zhang, Ning Wang
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 (∼17.4%/K) and temperature resolution (∼0.026 K), enabling the sensitive monitoring of the thermal environment of small spaces or the temperature of even nanoscale structures.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b08946

DOI: 10.1021/acs.jpcc.7b08946

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.