Multiresponsive Block Copolymer-Modified "Hairy" Gold Nanoparticles for Remote Control of Interfaces

Hybrid gold nanoparticles modified with poly(N‐isopropylacrylamide)‐block‐poly(2‐succinyloxyethyl methacrylate) (PNIPAM‐b‐PSEMA) brushes are synthesized using surface‐initiated atom transfer radical polymerization (SI‐ATRP). The “hairy” particles demonstrate reversible pH‐ and temperature‐controlled...

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Bibliographic Details
Published in:Particle & particle systems characterization 2013-11, Vol.30 (11), p.950-957
Main Authors: Shi, Yelu, Selin, Victor, Wang, Yuhao, Sukhishvili, Svetlana A.
Format: Article
Language:English
Subjects:
block copolymer brushes
Block copolymers
Gold
hybrid nanoparticles
Illumination
Lasers
Light (visible radiation)
multiresponsive particles
Nanoparticles
photothermal effect
Radicals
surface-initiated atom transfer radical polymerization
Wettability
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Summary:Hybrid gold nanoparticles modified with poly(N‐isopropylacrylamide)‐block‐poly(2‐succinyloxyethyl methacrylate) (PNIPAM‐b‐PSEMA) brushes are synthesized using surface‐initiated atom transfer radical polymerization (SI‐ATRP). The “hairy” particles demonstrate reversible pH‐ and temperature‐controlled changes in size and aggregation state in solution. When adsorbed within a sub‐monolayer at a solid surface, they support reversible changes in surface wettability in response to changes in solution pH, temperature, or illumination by laser light. Synthesis of hybrid “hairy” multiresponsive gold nanoparticles is achieved, and the application of these nanoparticles to control wettability of interfaces by changes in solution pH, temperature, or through illumination by laser light is demonstrated. The nanoparticles are prepared by grafting amphiphilic, dually responsive block copolymer from their surface using surface‐initiated atom transfer radical polymerization (SI‐ATRP).
ISSN:0934-0866
1521-4117
DOI:10.1002/ppsc.201300220