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In Situ Investigation on the Nanoscale Capture and Evolution of Aerosols on Nanofibers
Nano Letters ( IF 9.6 ) Pub Date : 2018-01-09 00:00:00 , DOI: 10.1021/acs.nanolett.7b04673 Rufan Zhang 1 , Bofei Liu 1 , Ankun Yang 1 , Yangying Zhu 1 , Chong Liu 1 , Guangmin Zhou 1 , Jie Sun 1 , Po-Chun Hsu 1 , Wenting Zhao 1 , Dingchang Lin 1 , Yayuan Liu 1 , Allen Pei 1 , Jin Xie 1 , Wei Chen 1 , Jinwei Xu 1 , Yang Jin 1 , Tong Wu 1 , Xuanyi Huang 1 , Yi Cui 1, 2
Nano Letters ( IF 9.6 ) Pub Date : 2018-01-09 00:00:00 , DOI: 10.1021/acs.nanolett.7b04673 Rufan Zhang 1 , Bofei Liu 1 , Ankun Yang 1 , Yangying Zhu 1 , Chong Liu 1 , Guangmin Zhou 1 , Jie Sun 1 , Po-Chun Hsu 1 , Wenting Zhao 1 , Dingchang Lin 1 , Yayuan Liu 1 , Allen Pei 1 , Jin Xie 1 , Wei Chen 1 , Jinwei Xu 1 , Yang Jin 1 , Tong Wu 1 , Xuanyi Huang 1 , Yi Cui 1, 2
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Aerosol-induced haze problem has become a serious environmental concern. Filtration is widely applied to remove aerosols from gas streams. Despite classical filtration theories, the nanoscale capture and evolution of aerosols is not yet clearly understood. Here we report an in situ investigation on the nanoscale capture and evolution of aerosols on polyimide nanofibers. We discovered different capture and evolution behaviors among three types of aerosols: wetting liquid droplets, nonwetting liquid droplets, and solid particles. The wetting droplets had small contact angles and could move, coalesce, and form axisymmetric conformations on polyimide nanofibers. In contrast, the nonwetting droplets had a large contact angle on polyimide nanofibers and formed nonaxisymmetric conformations. Different from the liquid droplets, the solid particles could not move along the nanofibers and formed dendritic structures. This study provides an important insight for obtaining a deep understanding of the nanoscale capture and evolution of aerosols and benefits future design and development of advanced filters.
中文翻译：
纳米纤维上气溶胶的纳米尺度捕获和演化的原位研究
气溶胶引起的雾霾问题已成为严重的环境问题。过滤被广泛应用于从气流中去除气溶胶。尽管有经典的过滤理论，但尚未清楚地了解气溶胶的纳米级捕获和演化。在这里，我们报告了对聚酰亚胺纳米纤维上气溶胶的纳米级捕获和演化的原位研究。我们发现三种类型的气溶胶具有不同的捕获和演化行为：润湿液滴，非润湿液滴和固体颗粒。湿滴的接触角较小，可以在聚酰亚胺纳米纤维上移动，聚结并形成轴对称构象。相反，非润湿液滴在聚酰亚胺纳米纤维上具有大的接触角，并形成非轴对称构象。与液滴不同，固体颗粒不能沿着纳米纤维移动并形成树枝状结构。这项研究为深入了解气溶胶的纳米级捕获和演化提供了重要的见识，并有益于高级过滤器的未来设计和开发。
更新日期：2018-01-09
中文翻译：
纳米纤维上气溶胶的纳米尺度捕获和演化的原位研究
气溶胶引起的雾霾问题已成为严重的环境问题。过滤被广泛应用于从气流中去除气溶胶。尽管有经典的过滤理论，但尚未清楚地了解气溶胶的纳米级捕获和演化。在这里，我们报告了对聚酰亚胺纳米纤维上气溶胶的纳米级捕获和演化的原位研究。我们发现三种类型的气溶胶具有不同的捕获和演化行为：润湿液滴，非润湿液滴和固体颗粒。湿滴的接触角较小，可以在聚酰亚胺纳米纤维上移动，聚结并形成轴对称构象。相反，非润湿液滴在聚酰亚胺纳米纤维上具有大的接触角，并形成非轴对称构象。与液滴不同，固体颗粒不能沿着纳米纤维移动并形成树枝状结构。这项研究为深入了解气溶胶的纳米级捕获和演化提供了重要的见识，并有益于高级过滤器的未来设计和开发。
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