PMID- 17117745
OWN - NLM
STAT- MEDLINE
DCOM- 20061226
LR  - 20190911
IS  - 1096-2247 (Print)
IS  - 1096-2247 (Linking)
VI  - 56
IP  - 11
DP  - 2006 Nov
TI  - Particle generation by ultraviolet-laser ablation during surface decontamination.
PG  - 1591-8
AB  - A novel photonic decontamination method was developed for removal of pollutants 
      from material surfaces. Such a method relies on the ability of a high-energy 
      laser beam to ablate materials from a contaminated surface layer, thus producing 
      airborne particles. In this paper, the authors presented the results obtained 
      using a scanning mobility particle sizer (SMPS) system and an aerosol particle 
      sizer (APS). Particles generated by laser ablation from the surfaces of cement, 
      chromium-embedded cement, and alumina were experimentally investigated. Broad 
      particle distributions from nanometer to micrometer in size were measured. For 
      stainless steel, virtually no particle > 500 nm in aerodynamic size was detected. 
      The generated particle number concentrations of all three of the materials were 
      increased as the 266-nm laser fluence (millijoules per square centimeter) 
      increased. Among the three materials tested, cement was found to be the most 
      favorable for particle removal, alumina next, and stainless steel the least. 
      Chromium (dropped in cement) showed almost no effects on particle production. For 
      all of the materials tested except for stainless steel, bimodal size 
      distributions were observed; a smaller mode peaked at approximately 50-70 nm was 
      detected by SMPS and a larger mode (peaked at approximately 0.70-0.85 microm) by 
      APS. Based on transmission electron microscopy observations, the authors 
      concluded that particles in the range of 50-70 nm were aggregates of primary 
      particles, and those of size larger than a few hundred nanometers were produced 
      by different mechanisms, for example, massive object ejection from the material 
      surfaces.
FAU - Lee, Doh-Won
AU  - Lee DW
AD  - Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 
      37831-6038, USA.
FAU - Cheng, Meng-Dawn
AU  - Cheng MD
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Air Waste Manag Assoc
JT  - Journal of the Air & Waste Management Association (1995)
JID - 9503111
RN  - 0 (Particulate Matter)
RN  - 0R0008Q3JB (Chromium)
RN  - 12597-68-1 (Stainless Steel)
RN  - LMI26O6933 (Aluminum Oxide)
SB  - IM
MH  - Aluminum Oxide
MH  - Chromium/chemistry
MH  - Decontamination/instrumentation/*methods
MH  - *Lasers
MH  - Microscopy, Electron, Transmission
MH  - Nanoparticles/*analysis/ultrastructure
MH  - Particle Size
MH  - Particulate Matter/*analysis
MH  - Stainless Steel
MH  - *Ultraviolet Rays
EDAT- 2006/11/23 09:00
MHDA- 2006/12/27 09:00
CRDT- 2006/11/23 09:00
PHST- 2006/11/23 09:00 [pubmed]
PHST- 2006/12/27 09:00 [medline]
PHST- 2006/11/23 09:00 [entrez]
AID - 10.1080/10473289.2006.10464555 [doi]
PST - ppublish
SO  - J Air Waste Manag Assoc. 2006 Nov;56(11):1591-8. doi: 
      10.1080/10473289.2006.10464555.