Journal
NANO LETTERS
Volume 10, Issue 1, Pages 85-91Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl902865v
Keywords
RAFT polymer; localized surface plasmon resonance; core/shell nanoparticles; polymeric micelles; EDXS spectroscopy; stimuli-responsive nanoparticles
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Funding
- NIBIB NIH HHS [EB000252, R01 EB000252-14, R01 EB000252, R01 EB000252-13] Funding Source: Medline
- NATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING [R01EB000252] Funding Source: NIH RePORTER
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We report a now strategy for synthesizing temperature-responsive gamma-Fe2O3-core/Au-shell nanoparticles (Au-mNPs) from diblock copolymer micelles. The amphiphilic diblock copolymer chains were synthesized using reversible addition-Fragmentation chain-transfer (RAFT) with a thermally responsive smart poly(N-isopropylacrylamide) (pNIPAAm) block and an amine-containing poly(N,N-dimethylaminoethylacrylamide) (DMAEAm) block that acted as a reducing agent during gold shell formation. The Au-mNPs reversibly aggregated upon heating the solution above the transition temperature of pNIPAAm, resulting in a red-shifted localized surface plasmon resonance.
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