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-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.
Sánchez-Iglesias
Ana
A
Departamento de Química Física and Unidad Asociada CSIC, Universidade de Vigo, 36310 Vigo, Spain.
Grzelczak
Marek
M
Rodríguez-González
Benito
B
Guardia-Girós
Pablo
P
Pastoriza-Santos
Isabel
I
Pérez-Juste
Jorge
J
Prato
Maurizio
M
Liz-Marzán
Luis M
LM
D000180:Acrylic Resins / Q000737:chemistry*; D005782:Gels; D006046:Gold / Q000737:chemistry*; D008280:Magnetics; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D055616:Microtechnology / Q000379:methods*; D009532:Nickel / Q000737:chemistry*; D055620:Optical Phenomena; D013052:Spectrometry, X-Ray Emission; D013696:Temperature
D000180:Acrylic Resins; D005782:Gels; C052970:poly-N-isopropylacrylamide; D006046:Gold; D009532:Nickel