3 years ago

Efficient Plasmonic Gas Sensing Based on Cavity-Coupled Metallic Nanoparticles

Efficient Plasmonic Gas Sensing Based on Cavity-Coupled Metallic Nanoparticles
Boyang Ding, Jian Qin, Yu-Hui Chen, Richard J. Blaikie, Min Qiu
Here, we demonstrate the gas sensing ability of cavity-coupled metallic nanoparticle systems, comprising gold nanoparticles separated from a gold mirror with a polymer spacer. An increase in relative humidity (RH) causes the spacer to expand, which induces a significant reduction of nanoparticle scattering intensity, as the scattering is highly dependent on the cavity–nanoparticle coupling that closely relates to the nanoparticle–mirror distance. With high structural tolerance, i.e., no requirement for high-precision nanoparticle geometry, this lithography-free system enables a remarkable average sensitivity at 0.12 dB/% RH and 0.25 dB/% RH over a wide RH range (45–75%) and full reversibility with much faster response time than the commercial electrochemical sensors, possessing the characteristics to be used for notable gas sensing.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b06502

DOI: 10.1021/acs.jpcc.7b06502

You might also like
Never Miss Important Research

Researcher is an app designed by academics, for academics. Create a personalised feed in two minutes.
Choose from over 15,000 academics journals covering ten research areas then let Researcher deliver you papers tailored to your interests each day.

  • 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.