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Title: Radiation pressure efficiency measurements of nanoparticle coated microspheres

Experimental measurements of the radiation pressure efficiency (Q{sub pr}) for several microparticles have been compared to theoretical calculations extrapolated from the Bohren-Huffman code for Mie scattering of coated particles. An increased shift of the Q{sub pr} parameter was observed for 2 μm SiO{sub 2} core particles coated with nanoparticles of higher refractive indices. Coatings of 14 nm melamine particles were found to increase the Q{sub pr} parameter 135 times over similar coatings using SiO{sub 2} particles of the same size. While a coating of 100 nm polystyrene particles also showed a significant increase, they did not agree well with theoretical values. It is hypothesized that other factors such as increased scatter, drag, and finite coating coverage are no longer negligible for coatings using nanoparticles in this size regime.
Authors:
 [1] ; ; ; ;  [2]
  1. National Research Council, Research Associateship Programs, 500 Fifth Street NW (Keck 568), Washington, D.C. 20001 (United States)
  2. Naval Research Laboratory, Chemistry Division, Bioanalytical Chemistry, Code 6112, 4555 Overlook Avenue S.W., Washington, D.C. 20375 (United States)
Publication Date:
OSTI Identifier:
22253933
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 23; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; COATINGS; EFFICIENCY; MELAMINE; MICROSPHERES; NANOSTRUCTURES; PARTICLES; POLYSTYRENE; RADIATION PRESSURE; REFRACTIVE INDEX; SILICA; SILICON OXIDES