Temperature-Dependent Viscosity of Organic Materials Characterized by Atomic Force Microscope

The viscosity of atmospheric aerosol particles determines the equilibrium timescale at which a molecule diffuses into and out of particles, influencing processes such as gas–particle partitioning, light scattering, and cloud formation that can affect air quality and climate. This particle viscosity...

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Autores principales:	Yiming Qin, Jianhuai Ye, Paul Ohno, Theodora Nah, Scot T. Martin
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	viscosity temperature-dependent atomic force microscope Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/97e9b01f2d494460805a08fc7b7c39fe
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spelling	oai:doaj.org-article:97e9b01f2d494460805a08fc7b7c39fe2021-11-25T16:45:15ZTemperature-Dependent Viscosity of Organic Materials Characterized by Atomic Force Microscope10.3390/atmos121114762073-4433https://doaj.org/article/97e9b01f2d494460805a08fc7b7c39fe2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4433/12/11/1476https://doaj.org/toc/2073-4433The viscosity of atmospheric aerosol particles determines the equilibrium timescale at which a molecule diffuses into and out of particles, influencing processes such as gas–particle partitioning, light scattering, and cloud formation that can affect air quality and climate. This particle viscosity is sensitive to environmental conditions such as relative humidity and temperature. Current experimental techniques mainly characterize aerosol viscosity at room temperature. The influence of temperature on the viscosity of organic aerosol remains underexplored. Herein, the viscosity of atmospherically relevant organic materials was examined at a range of temperatures from 15 °C to 95 °C using an atomic force microscope (AFM) equipped with a temperature-controlled sample module. Dioctyl phthalate and sucrose were selected for investigation. Dioctyl phthalate served as the proxy for atmospherically relevant primary organic materials while sucrose served as the proxy for secondary organic materials. The resonant frequency responses of the AFM cantilever within dioctyl phthalate and sucrose were recorded. The link between the resonant frequency and material viscosity was established via a hydrodynamic function. Results obtained from this study were consistent with previously reported viscosities, thus demonstrating the critical capability of AFM in temperature-dependent viscosity measurements.Yiming QinJianhuai YePaul OhnoTheodora NahScot T. MartinMDPI AGarticleviscositytemperature-dependentatomic force microscopeMeteorology. ClimatologyQC851-999ENAtmosphere, Vol 12, Iss 1476, p 1476 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	viscosity temperature-dependent atomic force microscope Meteorology. Climatology QC851-999
spellingShingle	viscosity temperature-dependent atomic force microscope Meteorology. Climatology QC851-999 Yiming Qin Jianhuai Ye Paul Ohno Theodora Nah Scot T. Martin Temperature-Dependent Viscosity of Organic Materials Characterized by Atomic Force Microscope
description	The viscosity of atmospheric aerosol particles determines the equilibrium timescale at which a molecule diffuses into and out of particles, influencing processes such as gas–particle partitioning, light scattering, and cloud formation that can affect air quality and climate. This particle viscosity is sensitive to environmental conditions such as relative humidity and temperature. Current experimental techniques mainly characterize aerosol viscosity at room temperature. The influence of temperature on the viscosity of organic aerosol remains underexplored. Herein, the viscosity of atmospherically relevant organic materials was examined at a range of temperatures from 15 °C to 95 °C using an atomic force microscope (AFM) equipped with a temperature-controlled sample module. Dioctyl phthalate and sucrose were selected for investigation. Dioctyl phthalate served as the proxy for atmospherically relevant primary organic materials while sucrose served as the proxy for secondary organic materials. The resonant frequency responses of the AFM cantilever within dioctyl phthalate and sucrose were recorded. The link between the resonant frequency and material viscosity was established via a hydrodynamic function. Results obtained from this study were consistent with previously reported viscosities, thus demonstrating the critical capability of AFM in temperature-dependent viscosity measurements.
format	article
author	Yiming Qin Jianhuai Ye Paul Ohno Theodora Nah Scot T. Martin
author_facet	Yiming Qin Jianhuai Ye Paul Ohno Theodora Nah Scot T. Martin
author_sort	Yiming Qin
title	Temperature-Dependent Viscosity of Organic Materials Characterized by Atomic Force Microscope
title_short	Temperature-Dependent Viscosity of Organic Materials Characterized by Atomic Force Microscope
title_full	Temperature-Dependent Viscosity of Organic Materials Characterized by Atomic Force Microscope
title_fullStr	Temperature-Dependent Viscosity of Organic Materials Characterized by Atomic Force Microscope
title_full_unstemmed	Temperature-Dependent Viscosity of Organic Materials Characterized by Atomic Force Microscope
title_sort	temperature-dependent viscosity of organic materials characterized by atomic force microscope
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/97e9b01f2d494460805a08fc7b7c39fe
work_keys_str_mv	AT yimingqin temperaturedependentviscosityoforganicmaterialscharacterizedbyatomicforcemicroscope AT jianhuaiye temperaturedependentviscosityoforganicmaterialscharacterizedbyatomicforcemicroscope AT paulohno temperaturedependentviscosityoforganicmaterialscharacterizedbyatomicforcemicroscope AT theodoranah temperaturedependentviscosityoforganicmaterialscharacterizedbyatomicforcemicroscope AT scottmartin temperaturedependentviscosityoforganicmaterialscharacterizedbyatomicforcemicroscope
_version_	1718413033254944768

Temperature-Dependent Viscosity of Organic Materials Characterized by Atomic Force Microscope

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