Synthesis of Multifunctional Composite Microgels via In Situ Ni Growth on pNIPAM-Coated Au Nanoparticles

Novel colloidal composites have been designed to incorporate multiple functionalities that allow optical detection, magnetic manipulation, molecular trapping, and thermal response. Such particles are made of gold nanoparticle cores covered by a thin layer of metallic nickel and a poly(N-isopropylacr...

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Bibliographic Details
Published in:ACS nano 2009-10, Vol.3 (10), p.3184-3190
Main Authors: Sánchez-Iglesias, Ana, Grzelczak, Marek, Rodríguez-González, Benito, Guardia-Girós, Pablo, Pastoriza-Santos, Isabel, Pérez-Juste, Jorge, Prato, Maurizio, Liz-Marzán, Luis M
Format: Article
Language:English
Subjects:
Acrylic Resins - chemistry
Gels
Gold - chemistry
Magnetics
Metal Nanoparticles - chemistry
Microscopy, Electron, Transmission
Microtechnology - methods
Nickel - chemistry
Optical Phenomena
Spectrometry, X-Ray Emission
Temperature
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Summary:Novel colloidal composites have been designed to incorporate multiple functionalities that allow optical detection, magnetic manipulation, molecular trapping, and thermal response. Such particles are made of gold nanoparticle cores covered by a thin layer of metallic nickel and a poly(N-isopropylacrylamide) (pNIPAM) shell. While the gold cores provide efficient optical response through localized surface plasmon resonances, nickel allows external magnetic manipulation and the pNIPAM shell can be swollen or collapsed as a function of temperature, thus allowing capture and release of various types of molecules.
ISSN:1936-0851
1936-086X
DOI:10.1021/nn9006169