Thermosensitive gold nanoparticles.
Thermosensitive gold nanoparticles were fabricated by conjugating Au with a thiol-terminated poly(N-isopropylacrylamide) or PPA; this polymer stabilizer exhibits a temperature transition while undergoing a hydrophilic to hydrophobic transformation. The introduction of PPA onto gold nanoparticles has sensitized Au nanoparticles with unique temperature dependence. At low temperature (25 degrees C), the solutions containing PPA-functionalized gold nanoparticles are transparent, whereas higher temperatures (30 degrees C) lead to opaque suspensions. The thermosensitive property of PPA-functionalized Au nanoparticles is reversible, and the clear-opaque suspensions can be repeated many times.
Zhu
Ming-Qiang
MQ
Department of Chemistry and Center for Materials Research, Washington State University, Pullman, Washington 99164, USA.
Wang
Li-Qiong
LQ
Exarhos
Gregory J
GJ
Li
Alexander D Q
AD
D000180:Acrylic Resins / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D006358:Hot Temperature; D008854:Microscopy, Electron; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size
D000180:Acrylic Resins; C052970:poly-N-isopropylacrylamide; D006046:Gold