Nanorod-coated PNIPAM microgels: thermoresponsive optical properties.
Nanoparticles and in particular gold nanorods have interesting optical properties arising from two well-differentiated plasmon modes. The frequency of such modes can be altered by their chemical environment and coupling with neighboring rods. This study investigates new composite materials made of gold nanorods adsorbed on thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) microgels. It is shown that the thermally induced collapse of the polymer network inside the particles leads to a red shift of the longitudinal plasmon band of the gold rods, which is found to be fully reversible.
Karg
Matthias
M
Stranski-Laboratorium für Physikalische und Theoretische Chemie, TU Berlin, Strasse des 17. Juni 124, 10623 Berlin, Germany.
Pastoriza-Santos
Isabel
I
Pérez-Juste
Jorge
J
Hellweg
Thomas
T
Liz-Marzán
Luis M
LM
D000180:Acrylic Resins; D005782:Gels; D006046:Gold; D006358:Hot Temperature; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D043942:Nanotubes / Q000648:ultrastructure; D055095:Optics and Photonics; D013056:Spectrophotometry, Ultraviolet; D020349:Surface Plasmon Resonance
D000180:Acrylic Resins; D005782:Gels; C052970:poly-N-isopropylacrylamide; D006046:Gold