Synthesis, structure and optical data storage properties of silver nanoparticles modified with azobenzene thiols
Synthesis, structure and optical data storage properties of silver nanoparticles modified with azobenzene thiols
复制标题
DOI：
10.1016/j.matchemphys.2015.12.025
复制
发表时间：
2016-02-15
影响因子：
4.6
通讯作者：
Yang, Bo
中科院分区：
文献类型：
--
作者：
Hu, Daqiao;Lin, Jizhi;Yang, Bo
制备了光敏偶氮苯硫醇配体修饰的银纳米粒子，并通过紫外-可见光谱研究了它们之间的相互作用。在用365 nm的UV光照射时，对于不含Ag的偶氮苯溶液观察到中心在445 nm处的吸光度的增加，对应于顺式偶氮苯异构体的n-pi* 过渡带，而对于含Ag的偶氮苯溶液观察到中心在445 nm处的吸光度的减少，显示偶氮发色团与Ag纳米颗粒的表面等离子体的强相互作用，特别是当吸收带彼此重叠时。双光子诱导光学数据存储实验证实了这种增强的光响应度。在25 mW的写入功率下，可以在掺杂有用偶氮苯硫醇配体改性的7重量%银纳米颗粒的光活性膜上记录图像，但即使在相同的记录条件下，也不能在不含Ag的偶氮苯膜中记录图像。(C)2015爱思唯尔B. V.保留所有权利。
Silver nanoparticles modified with photoresponsive azobenzene thiol ligands are prepared and the interaction between them has been investigated through photoisomerization behaviour by UV-vis spectroscopy. Upon irradiation with UV light at 365 nm, an increase of the absorbance centered at 445 nm corresponding to the n-pi* transition band of cis azobenzene isomers is observed for azobenzene solution without Ag and a decrease of the absorbance centered at 445 nm is observed for azobenzene solution with Ag, showing strong interaction of azo chromophores with surface plasmons of Ag nano particles, in particular when the absorption bands are overlapped with each other. The enhanced light-responsivity has been confirmed by two-photon induced optical data storage experiments. An image can be recorded on the photoactive film doped with 7 wt% silver nanoparticles modified with azobenzene thiol ligands under writing power of 25 mW, but is failed to be recorded in the azobenzene film without Ag even under the same recording condition. (C) 2015 Elsevier B.V. All rights reserved.