| Nanogel nanosecond photonic crystal optical switching. | |
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MedLine Citation:
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PMID: 14759207 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We developed a robust nanosecond photonic crystal switching material by using poly(N-isopropylacrylamide) (PNIPAM) nanogel colloidal particles that self-assemble into crystalline colloidal arrays (CCAs). The CCA was polymerized into a loose-knit hydrogel which permits the individual embedded nanogel PNIPAM particles to coherently and synchronously undergo their thermally induced volume phase transitions. A laser T-jump from 30 to 35 degrees C actuates the nanogel particle shrinkage; the resulting increased diffraction decreases light transmission within 900 ns. Additional transmission decreases occur with characteristic times of 19 and 130 ns. Individual NIPAM sphere volume switching occurs in the approximately 100 ns time regime. These nanogel nanosecond phenomena may be useful in the design of fast photonic crystal switches and optical limiting materials. Smaller nanogels will show even faster volume phase transitions. |
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Authors:
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Chad E Reese; Alexander V Mikhonin; Marta Kamenjicki; Alexander Tikhonov; Sanford A Asher |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of the American Chemical Society Volume: 126 ISSN: 0002-7863 ISO Abbreviation: J. Am. Chem. Soc. Publication Date: 2004 Feb |
Date Detail:
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Created Date: 2004-02-04 Completed Date: 2004-05-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503056 Medline TA: J Am Chem Soc Country: United States |
Other Details:
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Languages: eng Pagination: 1493-6 Citation Subset: - |
Affiliation:
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Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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