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Binary Gas Analyzer Based on a Single Gold Nanoparticle Photothermal Response
[Image: see text] Although thermal conductivity gas analyzers are ubiquitous in industry, shrinking the sensing unit to a microscopic scale is rarely achieved. Since heat transfer between a metal nanoparticle and its ambient gas changes the temperature, refractive index, and density of the gaseous s...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7594000/ https://www.ncbi.nlm.nih.gov/pubmed/33134676 http://dx.doi.org/10.1021/acsomega.0c03124 |
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author | Li, Xiangxiong Hong, Jiani Zhang, Luning |
author_facet | Li, Xiangxiong Hong, Jiani Zhang, Luning |
author_sort | Li, Xiangxiong |
collection | PubMed |
description | [Image: see text] Although thermal conductivity gas analyzers are ubiquitous in industry, shrinking the sensing unit to a microscopic scale is rarely achieved. Since heat transfer between a metal nanoparticle and its ambient gas changes the temperature, refractive index, and density of the gaseous surrounding, one may tackle the problem using a single nanoparticle’s photothermal effect. Upon heating by a 532 nm laser, a single gold nanoparticle transfers heat to the surrounding gas environment, which results in a change in the photothermal polarization of a 633 nm probe laser. The amplitude of the photothermal signal correlates directly with the concentration of binary gas mixture. In He/Ar, He/N(2), He/air, and H(2)/Ar binary gas mixtures, the signal is linearly proportional to the He and H(2) molar concentrations up to about 10%. The photothermal response comes from the microscopic gaseous environment of a single gold nanoparticle, extending from the nanoparticle roughly to the length of the gas molecule’s mean free path. This study points to a way of sensing binary gas composition in a microscopic volume using a single metal nanoparticle. |
format | Online Article Text |
id | pubmed-7594000 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-75940002020-10-30 Binary Gas Analyzer Based on a Single Gold Nanoparticle Photothermal Response Li, Xiangxiong Hong, Jiani Zhang, Luning ACS Omega [Image: see text] Although thermal conductivity gas analyzers are ubiquitous in industry, shrinking the sensing unit to a microscopic scale is rarely achieved. Since heat transfer between a metal nanoparticle and its ambient gas changes the temperature, refractive index, and density of the gaseous surrounding, one may tackle the problem using a single nanoparticle’s photothermal effect. Upon heating by a 532 nm laser, a single gold nanoparticle transfers heat to the surrounding gas environment, which results in a change in the photothermal polarization of a 633 nm probe laser. The amplitude of the photothermal signal correlates directly with the concentration of binary gas mixture. In He/Ar, He/N(2), He/air, and H(2)/Ar binary gas mixtures, the signal is linearly proportional to the He and H(2) molar concentrations up to about 10%. The photothermal response comes from the microscopic gaseous environment of a single gold nanoparticle, extending from the nanoparticle roughly to the length of the gas molecule’s mean free path. This study points to a way of sensing binary gas composition in a microscopic volume using a single metal nanoparticle. American Chemical Society 2020-10-14 /pmc/articles/PMC7594000/ /pubmed/33134676 http://dx.doi.org/10.1021/acsomega.0c03124 Text en This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Li, Xiangxiong Hong, Jiani Zhang, Luning Binary Gas Analyzer Based on a Single Gold Nanoparticle Photothermal Response |
title | Binary Gas Analyzer Based on a Single Gold Nanoparticle
Photothermal Response |
title_full | Binary Gas Analyzer Based on a Single Gold Nanoparticle
Photothermal Response |
title_fullStr | Binary Gas Analyzer Based on a Single Gold Nanoparticle
Photothermal Response |
title_full_unstemmed | Binary Gas Analyzer Based on a Single Gold Nanoparticle
Photothermal Response |
title_short | Binary Gas Analyzer Based on a Single Gold Nanoparticle
Photothermal Response |
title_sort | binary gas analyzer based on a single gold nanoparticle
photothermal response |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7594000/ https://www.ncbi.nlm.nih.gov/pubmed/33134676 http://dx.doi.org/10.1021/acsomega.0c03124 |
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