Direct Spectroscopic Quantification of the Absorption and Scattering Properties for Single Aerosol Particles.
Direct Spectroscopic Quantification of the Absorption and Scattering Properties for Single Aerosol Particles.
复制标题
单个气溶胶颗粒的吸收和散射特性的直接光谱定量。
DOI:
10.1021/acs.jpca.2c00532
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发表时间:
2022-03-10
影响因子:
2.9
通讯作者:
Cotterell, Michael, I
中科院分区:
文献类型:
--
作者:
Knight, Jamie W.;Egan, Joanna, V;Orr-Ewing, Andrew J.;Cotterell, Michael, I
Understanding the optical properties of micrometer-scale light-absorbing aerosol particles is of paramount importance in addressing key challenges in atmospheric and physical chemistry. For example, the absorption of solar radiation by atmospheric aerosols represents one of the largest uncertainties in climate models. Moreover, reaction acceleration within the unique environments of aerosol droplets cannot be replicated in bulk solutions. The causes of these reaction rate enhancements remain controversial, but ultrasensitive spectroscopic measurements of evolving aerosol optical properties should provide new insights. We demonstrate a new approach using cavity ring-down spectroscopy that allows the first direct spectroscopic quantification of the continuously evolving absorption and scattering cross sections for single, levitated, micrometer-scale particles as their size and chromophore concentration change. For two-component droplets composed of nigrosin and 1,2,6-hexanetriol, the unprecedented sensitivity of our measurements reveals the evolving real and imaginary components of the refractive index caused by changes in concentration as 1,2,6-hexanetriol slowly evaporates.
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影响因子:
5.9
作者:
Bzdek, Bryan R.;Reid, Jonathan P.;Cotterell, Michael I.
通讯作者:
Cotterell, Michael I.
影响因子:
6.1
作者:
Lee JK;Banerjee S;Nam HG;Zare RN
通讯作者:
Zare RN
影响因子:
5.2
作者:
Cotterell, Michael I.;Szpek, Kate;Langridge, Justin M.
通讯作者:
Langridge, Justin M.
DOI:
10.1073/pnas.1206575109
发表时间:
2012-09-11
影响因子:
11.1
作者:
Lack, Daniel A.;Langridge, Justin M.;Schwarz, Joshua P.
通讯作者:
Schwarz, Joshua P.
影响因子:
11.4
作者:
Lee, Alex K. Y.;Zhao, Ran;Abbatt, Jonathan. P. D.
通讯作者:
Abbatt, Jonathan. P. D.