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Protein crystallization induced by strong photons–molecules coupling fields photochemical reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
26739 43973 2011 5 PDF Available
Title
Protein crystallization induced by strong photons–molecules coupling fields photochemical reaction
Abstract

Photochemically induced protein crystallization byprotein's multiphoton excitation based on enhanced field of localized surface plasmon resonance (LSPR) of gold nanostructures was investigated. As strong photons–molecules coupling fields, gold nanostructures composed of nanoblocks and gold nanocolloid were used. With gold nanostructures, we could observe enzyme activity decrease by light irradiation that protein does not absorb. Surface observation of gold nanostructure by DFM (non-contact dynamic force microscope) shows that proteins were aggregated at around the nanoblock due to photochemical reaction by enhanced field. Crystallization probability depends on the excitation photon fluence, which indicates 3 photons absorption process occurred.

► We demonstrated photochemically induced protein crystallization. ► Excitation of protein was used with strong photon–molecule coupling fields. ► Gold nano particle and gold nano structure were used. ► Frequency of protein crystallization was enhanced in the presence of gold nano structure.

Keywords
Plasmon; Strong photons–molecules coupling fields; Protein crystallization
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 221, Issues 2–3, 25 June 2011, Pages 268–272
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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