journal article·2020-07-28Open access

Real-Time Measurement of the Hygroscopic Growth Dynamics of Single Aerosol Nanoparticles with Bloch Surface Wave Microscopy

Yan Kuai, Zhibo Xie, Junxue Chen, Huaqiao Gui, Liang Xu, Cuifang Kuang, Pei Wang, Xu Liu, Jianguo Liu, Joseph. R. Lakowicz, Douguo Zhang

ACS Nano· Volume 14· Issue 7

Abstract

The growth in aerosol particles caused by water uptake during increasing ambient relative humidity alters the physical and chemical properties of aerosols, which then affects public health, atmospheric chemistry, and the Earth's climate. The temporal resolution and sensitivity of current techniques are not sufficient to measure the growth dynamics of single aerosol nanoparticles. Additionally, the specific time required for phase transition from solid to aqueous has not been measured. Here, we describe a label-free photonic microscope that uses the Bloch surface waves as the illumination source for imaging and sensing to provide real-time measurements of the hygroscopic growth dynamics of a single aerosol (diameter <100 nm) containing the main components of air pollution. This specific time can be measured for both pure and mixed aerosols, showing that organics will delay the phase transition. This photonic microscope can be extended to investigate physicochemical reactions of various aerosols, and then knowing this specific time will be favorable for understanding the reaction kinetics among single aerosols and the surrounding medium.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Atmospheric aerosols and clouds · Thermal Radiation and Cooling Technologies · Allergic Rhinitis and Sensitization

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Advanced Laser Technology Laboratory of Anhui Province and Institute of Photonics, Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China

Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China

School of Science, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China

State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China

Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology University of Maryland School of Medicine, Baltimore, Maryland 21201, United States

Funding

University of Science and Technology of China · NIH Office of the Director · Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · National Institute of General Medical Sciences · Center for Micro and Nanoscale Research and Fabrication, University of Science and Technology · Advanced Laser Technology Laboratory of Anhui Province · Anhui Province · Key Laboratory of Environmental Optics and Technology

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