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ABSTRACT
The extinction efficiency (mass normalized extinction cross section) of a sample of metallic single wall carbon nanotubes (SWCNTs) has been measured in the infrared spectral region. The tubes were obtained from Nano-Integris Inc. and measured while suspended in propanol. Calculation of the extinction efficiency based on a computational code for fibers of finite length shows good agreement with the experimental results. The computation involved convolution over the SWCNTs’ length and diameter distributions. The results emphasize the potential of SWCNTs as efficient obscurants of electromagnetic radiation in the infrared spectral region.
Acknowledgment
The authors acknowledge the support of Jeff Hale, Edgewood Chemical and Biological Center, U.S. Army, on this and other aspects of aerosol physics.
Disclosure statement
No potential conflict of interest was reported by the authors.
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Notes on contributors
Sharhabeel Alyones
Sharhabeel Alyones is a visiting research associate professor at the Physics Department, New Mexico State University. He is also an associate professor at the Physics Department, The Hashemite University, Jordan. He received his BSc and MSc degrees in Physics from Yarmouk University, Jordan, PhD in physics and Master's in electrical engineering from New Mexico State University. His research is in the area of electromagnetic interactions with specific particulate shapes and materials across the electromagnetic spectrum. His other research areas include electrodynamics of aerosol particles and electrodynamics of metamaterials. He has published many high-quality publications and produced many technical reports for various funding organizations.
Michael Granado
Michael Granado is an Associate Research Scientist in the Physics Department at New Mexico State University. He received a BS degree in Electrical and Computer Engineering Technology and a Master's in Business Administration from New Mexico State University (2007 and 2010). He began his work as an engineer for this Applied Optical Group at NMSU while attending graduate school collaborating on several tech reports and studies in physics and engineering. Upon receiving his master's degree he began full-time employment as a research assistant, has continued work on many aerosol analyses, and has authored and co-authored many technical study reports and publications; he has also participated in significant field tests and formulation of reports including Smoke Week 2012 at White Sands Missile Range – along with other tests conducted at Edgewood Chemical and Biological Center in Maryland.
Charles. W. Bruce
Charles W. Bruce is a College Professor at the Physics Department, New Mexico State University. He received a BA degree in Physics from Union College, Schenectady in 1959 and both master's and PhD degrees in Physics from New Mexico State University (1968 and 1970). His initial research was in laser-induced plasmas and development of pulsed laser instrumentation at Kirtland AF Base in the early 1960s. From 1971 to 1995 he was employed at the US Army Atmospheric Sciences Laboratory. From 1984 to the present he has also been a College Professor at the Physics Department at NMSU (initially through the Intergovernmental Personel Act (IPA)). His other research areas have been (a) radio frequency excited low-density plasmas, (b) air contamination research on both sides of the USA–Mexico border and (c) molecular and particulate spectroscopy with current emphasis on electromagnetic interactions with specific particulate shapes and materials across the spectrum. Each of these efforts has produced publications. A number of new techniques are described in publications and patents.