80电影天堂网,少妇高潮一区二区三区99,jαpαnesehd熟女熟妇伦,无码人妻精品一区二区蜜桃网站

相關(guān)鏈接
聯(lián)系方式
  • 通信地址:浙江省杭州市余杭區(qū)倉(cāng)前街道余杭塘路2318號(hào)勤園17號(hào)樓231房間
  • 郵編:311121
  • 電話:0571-28868883
  • 傳真:0571-28867909
  • Email:yjhuang@hznu.edu.cn
當(dāng)前位置:> 首頁(yè) > 論文著作 > 正文
【Langmuir 】Light-Triggered Reversible Self-Assembly of Gold Nanoparticle Oligomers for Tunable SERS
作者:Zhang Lei; Dai Liwei; Rong Yun; Liu Zhenzhong; Tong Dingyi; Huang Youju*; Chen Tao*
關(guān)鍵字:Gold Nanoparticle Oligomers
論文來(lái)源:期刊
具體來(lái)源:Langmuir 2015, 31, 1164-1171
發(fā)表時(shí)間:2015年

A photoresponsive amphiphilic gold nanoparticle (AuNP) is achieved through the decoration of AuNP with hydrophilic poly(ethylene glycol) (PEG) and hydrophobic photoresponsive polymethacrylate containing spiropyran units (PSPMA). Owing to the photoresponsive property of spiropyran units, the amphiphilic AuNPs can easily achieve the controllable assembly/disassembly behaviors under the trigger by light. Under visible light, spiropyran units provide weak intermolecular interactions between neighbored AuNPs, leading to isolated AuNPs in the solution. While under UV light irradiation, spiropyran units in the polymer brushes transform into merocyanine isomer with conjugated structure and zwitterionic state, promoting the integration of adjacent AuNPs through π?π stacking and electrostatic attractions, further leading to the formation of Au oligomers. The smart reversible AuNP oligomers exhibited switchable plasmonic coupling for tuning surface-enhanced Raman scattering (SERS) activity, which is promising for the application of SERS based sensors and optical imaging.