Surface-Area-to-Volume Ratio Determines Surface Tensions in Microscopic, Surfactant-Containing Droplets.
Surface-Area-to-Volume Ratio Determines Surface Tensions in Microscopic, Surfactant-Containing Droplets.
复制标题
表面积与体积之比决定了含表面活性剂的微观液滴中的表面张力。
DOI:
10.1021/acscentsci.3c00998
复制
发表时间:
2023-11-22
影响因子:
18.2
通讯作者:
Bzdek, Bryan R.
中科院分区:
文献类型:
--
作者:
Bain, Alison;Ghosh, Kunal;Prisle, Nonne L.;Bzdek, Bryan R.
The surface composition of aerosol droplets is central to predicting cloud droplet number concentrations, understanding atmospheric pollutant transformation, and interpreting observations of accelerated droplet chemistry. Due to the large surface-area-to-volume ratios of aerosol droplets, adsorption of surfactant at the air–liquid interface can deplete the droplet’s bulk concentration, leading to droplet surface compositions that do not match those of the solutions that produced them. Through direct measurements of individual surfactant-containing, micrometer-sized droplet surface tensions, and fully independent predictive thermodynamic modeling of droplet surface tension, we demonstrate that, for strong surfactants, the droplet’s surface-area-to-volume ratio becomes the key factor in determining droplet surface tension rather than differences in surfactant properties. For the same total surfactant concentration, the surface tension of a droplet can be >40 mN/m higher than that of the macroscopic solution that produced it. These observations indicate that an explicit consideration of surface-area-to-volume ratios is required when investigating heterogeneous chemical reactivity at the surface of aerosol droplets or estimating aerosol activation to cloud droplets. Surface-area-to-volume ratio becomes the key determinant of surface tension for small droplets containing strong surfactants.
登录
查看更多内容
影响因子:
8.4
作者:
Bzdek BR;Power RM;Simpson SH;Reid JP;Royall CP
通讯作者:
Royall CP
影响因子:
4.9
作者:
Ekstrom, S.;Noziere, B.;Artaxo, P.
通讯作者:
Artaxo, P.
影响因子:
2.9
作者:
Lee, Hansol D.;Estillore, Armando D.;Tivanski, Alexei V.
通讯作者:
Tivanski, Alexei V.
影响因子:
16.6
作者:
Bain, Ryan M.;Pulliam, Christopher J.;Cooks, R. Graham
通讯作者:
Cooks, R. Graham
影响因子:
5
作者:
HAYASE, K;TSUBOTA, H
通讯作者:
TSUBOTA, H