Detection and characterization of chemical and biological aerosols using laser-trapping single-particle Raman spectroscopy

Aimable Kalume, Zhiyong Gong, Chuji Wang, Joshua Santarpia, Yong Le Pan

Research output: Contribution to journalArticle

Abstract

Detection and characterization of the presence of chemical and biological agent aerosols in various complex atmospheric environments is essential. Raman spectroscopy has the ability to identify chemical molecules, but there are a limited number of photons detectable from each single airborne aerosol particle as it flows through a detecting system. Here, we report a single-particle Raman spectrometer that can measure strong spontaneous, stimulated, and resonance Raman spectra from a single laser-trapped airborne aerosol particle. Samples such as the VX nerve agent chemical simulant diethyl phthalate and various pollens were tested. A particular optical trap using two focusing counter-propagating hollow beams was able to stably trap both absorbing and non-absorbing particles in air for long observation times. Using this system, time-resolved Raman spectra and elastic scattered intensities were recorded to monitor the chemical properties and size variation of the trapped particle. Specifically, the developed technology was able to measure the Raman spectra from different submicron positions within a single laser-trapped airborne particle. Such a system provides a new approach for the detection and characterization of single airborne chemical- and biological-agent aerosol particles, as well as.to detect and monitor the molecules and molecular reactions located in different positions within a micron-sized particle as it responds to various micro-local environments.

Original languageEnglish (US)
Pages (from-to)323-329
Number of pages7
JournalWIT Transactions on Ecology and the Environment
Volume230
DOIs
StatePublished - Jan 1 2018

Fingerprint

Raman spectroscopy
trapping
laser
aerosol
phthalate
chemical property
spectrometer
pollen
chemical
particle
detection
air

Keywords

  • Chemical and biological agent aerosols
  • Laser trapping
  • Single airborne aerosol particle
  • Submicron position-resolved raman spectra

ASJC Scopus subject areas

  • Environmental Science(all)

Cite this

Detection and characterization of chemical and biological aerosols using laser-trapping single-particle Raman spectroscopy. / Kalume, Aimable; Gong, Zhiyong; Wang, Chuji; Santarpia, Joshua; Pan, Yong Le.

In: WIT Transactions on Ecology and the Environment, Vol. 230, 01.01.2018, p. 323-329.

Research output: Contribution to journalArticle

@article{242b6a8153284225891bbb2810323717,
title = "Detection and characterization of chemical and biological aerosols using laser-trapping single-particle Raman spectroscopy",
abstract = "Detection and characterization of the presence of chemical and biological agent aerosols in various complex atmospheric environments is essential. Raman spectroscopy has the ability to identify chemical molecules, but there are a limited number of photons detectable from each single airborne aerosol particle as it flows through a detecting system. Here, we report a single-particle Raman spectrometer that can measure strong spontaneous, stimulated, and resonance Raman spectra from a single laser-trapped airborne aerosol particle. Samples such as the VX nerve agent chemical simulant diethyl phthalate and various pollens were tested. A particular optical trap using two focusing counter-propagating hollow beams was able to stably trap both absorbing and non-absorbing particles in air for long observation times. Using this system, time-resolved Raman spectra and elastic scattered intensities were recorded to monitor the chemical properties and size variation of the trapped particle. Specifically, the developed technology was able to measure the Raman spectra from different submicron positions within a single laser-trapped airborne particle. Such a system provides a new approach for the detection and characterization of single airborne chemical- and biological-agent aerosol particles, as well as.to detect and monitor the molecules and molecular reactions located in different positions within a micron-sized particle as it responds to various micro-local environments.",
keywords = "Chemical and biological agent aerosols, Laser trapping, Single airborne aerosol particle, Submicron position-resolved raman spectra",
author = "Aimable Kalume and Zhiyong Gong and Chuji Wang and Joshua Santarpia and Pan, {Yong Le}",
year = "2018",
month = "1",
day = "1",
doi = "10.2495/AIR180301",
language = "English (US)",
volume = "230",
pages = "323--329",
journal = "WIT Transactions on Ecology and the Environment",
issn = "1743-3541",
publisher = "WIT Press",

}

TY - JOUR

T1 - Detection and characterization of chemical and biological aerosols using laser-trapping single-particle Raman spectroscopy

AU - Kalume, Aimable

AU - Gong, Zhiyong

AU - Wang, Chuji

AU - Santarpia, Joshua

AU - Pan, Yong Le

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Detection and characterization of the presence of chemical and biological agent aerosols in various complex atmospheric environments is essential. Raman spectroscopy has the ability to identify chemical molecules, but there are a limited number of photons detectable from each single airborne aerosol particle as it flows through a detecting system. Here, we report a single-particle Raman spectrometer that can measure strong spontaneous, stimulated, and resonance Raman spectra from a single laser-trapped airborne aerosol particle. Samples such as the VX nerve agent chemical simulant diethyl phthalate and various pollens were tested. A particular optical trap using two focusing counter-propagating hollow beams was able to stably trap both absorbing and non-absorbing particles in air for long observation times. Using this system, time-resolved Raman spectra and elastic scattered intensities were recorded to monitor the chemical properties and size variation of the trapped particle. Specifically, the developed technology was able to measure the Raman spectra from different submicron positions within a single laser-trapped airborne particle. Such a system provides a new approach for the detection and characterization of single airborne chemical- and biological-agent aerosol particles, as well as.to detect and monitor the molecules and molecular reactions located in different positions within a micron-sized particle as it responds to various micro-local environments.

AB - Detection and characterization of the presence of chemical and biological agent aerosols in various complex atmospheric environments is essential. Raman spectroscopy has the ability to identify chemical molecules, but there are a limited number of photons detectable from each single airborne aerosol particle as it flows through a detecting system. Here, we report a single-particle Raman spectrometer that can measure strong spontaneous, stimulated, and resonance Raman spectra from a single laser-trapped airborne aerosol particle. Samples such as the VX nerve agent chemical simulant diethyl phthalate and various pollens were tested. A particular optical trap using two focusing counter-propagating hollow beams was able to stably trap both absorbing and non-absorbing particles in air for long observation times. Using this system, time-resolved Raman spectra and elastic scattered intensities were recorded to monitor the chemical properties and size variation of the trapped particle. Specifically, the developed technology was able to measure the Raman spectra from different submicron positions within a single laser-trapped airborne particle. Such a system provides a new approach for the detection and characterization of single airborne chemical- and biological-agent aerosol particles, as well as.to detect and monitor the molecules and molecular reactions located in different positions within a micron-sized particle as it responds to various micro-local environments.

KW - Chemical and biological agent aerosols

KW - Laser trapping

KW - Single airborne aerosol particle

KW - Submicron position-resolved raman spectra

UR - http://www.scopus.com/inward/record.url?scp=85057201412&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85057201412&partnerID=8YFLogxK

U2 - 10.2495/AIR180301

DO - 10.2495/AIR180301

M3 - Article

AN - SCOPUS:85057201412

VL - 230

SP - 323

EP - 329

JO - WIT Transactions on Ecology and the Environment

JF - WIT Transactions on Ecology and the Environment

SN - 1743-3541

ER -