摘要
将金纳米颗粒(AuNPs)组装到聚N-异丙基丙烯酰胺(PNIPAM)水凝胶微球表面制备出AuNPs/PNIPAM复合颗粒.将PNIPAM凝胶的温敏特性与AuNPs的光学性质结合,通过改变温度调节AuNPs的局部表面等离子共振(LSPR)吸收峰位置.研究结果表明,温度升高使AuNPs的LSPR吸收峰发生红移,并且这种效应是可逆的.同时发现,AuNPs的光学性质还可以作为表征PNIPAM水凝胶微球温敏行为的一种手段.利用透射电镜、紫外-可见光谱仪及动态光散射仪对AuNPs/PNIPAM复合颗粒的形貌、光学性质、粒径变化等进行了分析.
A new composite of Au nanoparticles （AuNPs） adsorbed on thermoresponsive poly（N-isopropyl acrylamide） （PNIPAM） microgels that combines the thermoresponsive behavior of PNIPAM microgels with the optical properties ofAu nanoparticles is reported. The LSPR （localized surface plasmon resonance） of the AuNPs could be changed by adjusting the temperature of the thermoresponsive PNIPAM microgels. An increase in temperature led to a red shift of the LSPR of the AuNPs and this change was found to be fully reversible. Optical properties of AuNPs were used to monitor the thermoresponsive behavior of PNIPAM microgels. The morphology, optical properties, and average particle size of AuNPs/PNIPAM particles were characterized by transmission electron microscopy （TEM）, UV-Vis spectroscopy and dynamic light scattering.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2008年第12期2159-2164,共6页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(20275008,30240085)
高等学校全国优秀博士学位论文作者专项资金(200252)资助项目
关键词
金纳米颗粒
聚N-异丙基丙烯酰胺
温敏凝胶
局部表面等离子共振
Au nanoparticles
Poly （N-isopropyl acrylomide）
Thermoresponsive microgels
Localized surface plasmon resonance
