skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Particle formation from pulsed laser irradiation of soot aggregates studied with a scanning mobility particle sizer, a transmission electron microscope, and a scanning transmission x-ray microscope

Abstract

We investigated the physical and chemical changes induced in soot aggregates exposed to laser radiation using a scanning mobility particle sizer, a transmission electron microscope,and a scanning transmission x-ray microscope to perform near-edge x-ray absorption fine structure spectroscopy. Laser-induced nanoparticle production was observed at fluences above0.12 J/cm2 at532 nm and0.22 J/cm2 at1064 nm. Our results indicate that new particle formation proceeds via (1) vaporization of small carbon clusters by thermal or photolytic mechanisms, followed by homogeneous nucleation, (2) heterogeneous nucleation of vaporized carbon clusters onto material ablated from primary particles, or (3)both processes.

Authors:
; ; ; ; ;
Publication Date:
OSTI Identifier:
20929659
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Optics; Journal Volume: 46; Journal Issue: 6; Other Information: DOI: 10.1364/AO.46.000959; (c) 2007 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION SPECTROSCOPY; ATOMIC CLUSTERS; CARBON; EVAPORATION; FINE STRUCTURE; LASER RADIATION; LASERS; MICROSCOPES; NUCLEATION; OPTICAL MICROSCOPY; PARTICLE SIZE; PHOTOCHEMISTRY; SOOT; TRANSMISSION ELECTRON MICROSCOPY; X RADIATION; X-RAY SPECTROSCOPY

Citation Formats

Michelsen, Hope A., Tivanski, Alexei V., Gilles, Mary K., Poppel, Laura H. van, Dansson, Mark A., and Buseck, Peter R. Particle formation from pulsed laser irradiation of soot aggregates studied with a scanning mobility particle sizer, a transmission electron microscope, and a scanning transmission x-ray microscope. United States: N. p., 2007. Web. doi:10.1364/AO.46.000959.
Copy to clipboard
Michelsen, Hope A., Tivanski, Alexei V., Gilles, Mary K., Poppel, Laura H. van, Dansson, Mark A., & Buseck, Peter R. Particle formation from pulsed laser irradiation of soot aggregates studied with a scanning mobility particle sizer, a transmission electron microscope, and a scanning transmission x-ray microscope. United States. doi:10.1364/AO.46.000959.
Copy to clipboard
Michelsen, Hope A., Tivanski, Alexei V., Gilles, Mary K., Poppel, Laura H. van, Dansson, Mark A., and Buseck, Peter R. Tue . "Particle formation from pulsed laser irradiation of soot aggregates studied with a scanning mobility particle sizer, a transmission electron microscope, and a scanning transmission x-ray microscope". United States. doi:10.1364/AO.46.000959.
Copy to clipboard
@article{osti_20929659,
title = {Particle formation from pulsed laser irradiation of soot aggregates studied with a scanning mobility particle sizer, a transmission electron microscope, and a scanning transmission x-ray microscope},
author = {Michelsen, Hope A. and Tivanski, Alexei V. and Gilles, Mary K. and Poppel, Laura H. van and Dansson, Mark A. and Buseck, Peter R},
abstractNote = {We investigated the physical and chemical changes induced in soot aggregates exposed to laser radiation using a scanning mobility particle sizer, a transmission electron microscope,and a scanning transmission x-ray microscope to perform near-edge x-ray absorption fine structure spectroscopy. Laser-induced nanoparticle production was observed at fluences above0.12 J/cm2 at532 nm and0.22 J/cm2 at1064 nm. Our results indicate that new particle formation proceeds via (1) vaporization of small carbon clusters by thermal or photolytic mechanisms, followed by homogeneous nucleation, (2) heterogeneous nucleation of vaporized carbon clusters onto material ablated from primary particles, or (3)both processes.},
doi = {10.1364/AO.46.000959},
journal = {Applied Optics},
number = 6,
volume = 46,
place = {United States},
year = {Tue Feb 20 00:00:00 EST 2007},
month = {Tue Feb 20 00:00:00 EST 2007}
}
Copy to clipboard
Journal Article:
DOI:  10.1364/AO.46.000959
Other availability
Find in Google Scholar Find in Google Scholar
Search WorldCat Search WorldCat to find libraries that may hold this journal
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

  • ; ; ; ... - Applied Optics
    We investigated the physical and chemical changes induced in soot aggregates exposed to laser radiation using a scanning mobility particle sizer, a transmission electron microscope, and a scanning transmission x-ray microscope to perform near-edge x-ray absorption fine structure spectroscopy. Laser-induced nanoparticle production was observed at fluences above 0.12 J/cm(2) at 532 nm and 0.22 J/cm(2) at 1064 nm. Our results indicate that new particle formation proceeds via (1) vaporization of small carbon clusters by thermal or photolytic mechanisms, followed by homogeneous nucleation, (2) heterogeneous nucleation of vaporized carbon clusters onto material ablated from primary particles, or (3) both processes.

  • ; ; ; ... - J. Electron. Spectrosc. Relat. Phenom.

  • - Microscopy and Microanalysis
    Closed form analytical equations used to calculate the collection solid angle of six common geometries of solid-state X-ray detectors in scanning and scanning/transmission analytical electron microscopy are presented. Using these formulae one can make realistic comparisons of the merits of the different detector geometries in modern electron column instruments. This work updates earlier formulations and adds new detector configurations.

  • ; ; ; ... - Industrial & Engineering Chemistry Research
    A key need identified across nanomanufacturing industry is the capability for real-time characterization of nanoparticles smaller than 50 nanometers on-line of synthesis processes. There is often an inadequate ability to monitor and control production processes for nanoscale materials, resulting in variability in product quality, which hinders progress in research and product development. A project was executed at Oak Ridge National Laboratory (ORNL) to demonstrate the capability of on-line real-time characterization of nanoparticle production on a system characteristic of those of great interest to nanomanufacturing industry. Production of titanium nanoparticles in vapor phase was chosen as a generic process for themore » demonstration. The results reported indicate that the analyzer could be used as a continuous monitor for precision nanoparticle production. The measurement technology is commercially available and provides reasonably stable performance throughout all the experiments designed for the demonstration. Recommendation was made in regarding real-time on-line characterization of engineered nanoparticle manufacturing.« less

  • ; ; ; ... - Analytical Chemistry (Washington)
    A scanning mobility particle sizer (SMPS) allows size separation of gas phase particles according to their electrophoretic mobilities. The addition of an electrospray source (ES) recently allowed extension of SMPS analysis to the macromolecular range. We demonstrate here the application of ES-SMPS to nucleic acids analysis. Single- and double-stranded DNA molecules ranging from 6.1 kDa (single-stranded DNA 20 nucleotides in length) to 300 kDa (500 base-pair double-stranded DNA) were separated and detected by ES-SMPS at the picomole to femtomole levels. The measured electrophoretic mobility diameters were found to correlate with the analytes` molecular weights, while the peak areas could yieldmore » quantitative information. No fragmentation of DNA was observed under the conditions employed. Different apparent densities were observed for single-stranded and double-stranded DNAs, showing a different behavior for each type of biomolecule. The total analysis time was about 3 min/spectrum. Further optimization of ES-SMPS is expected to make it a fast and sensitive technique for biopolymer characterization. 96 refs., 10 figs., 1 tab.« less