Femtosecond laser-assisted synthesis of silver nanoparticles and reduced graphene oxide hybrid for optical limiting
Femtosecond laser-assisted synthesis of silver nanoparticles and reduced graphene oxide hybrid for optical limiting
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飞秒激光辅助合成银纳米颗粒和还原氧化石墨烯杂化物用于光限幅
DOI：
10.1098/rsos.171436;171436
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发表时间：
2018
影响因子：
3.5
通讯作者：
Xu Huanhuan
中科院分区：
文献类型：
--
作者：
Yu Yang;Yan Lihe;Yue Mengmeng;Xu Huanhuan
采用飞秒激光烧蚀液相法制备了银纳米颗粒（Ag NPs）功能化的还原氧化石墨烯（rGO）。利用飞秒激光脉冲烧蚀硝酸银和氧化石墨烯（GO）的混合水溶液，实现了Ag离子和GO的同时还原，得到了分散性良好的Ag-GO纳米粒子。系统研究了激光功率、辐照时间和银离子浓度对产物光学性能和形貌的影响。利用纳秒Z扫描技术研究了功能化石墨烯的非线性光学响应。与GO和rGO相比，rGO混合物显示出增强的非线性吸收（NLA）效应，因此表现出优异的光限幅（OL）特性，具有非常低的激活阈值，其估计为约0.38 J cm-2。rGO杂化材料中NLA效应的增强使得制备固态光限幅器成为可能，提高了石墨烯材料在OL领域的实用性。
Reduced graphene oxide (rGO) functionalized with silver nanoparticles (Ag NPs) is prepared using a femtosecond laser ablation in liquids method. By ablating the mixed aqueous solutions of silver nitrate and graphene oxide (GO) using femtosecond laser pulses, Ag ions and GO are simultaneously reduced and well-dispersed Ag NPs supported on rGO are obtained. The effect of laser power, irritation time and Ag ion concentration on the optical property and morphology of the products are systematically studied. The nonlinear optical responses of the functionalized graphene are studied using a nanosecond Z-scan technique. The rGO hybrid shows an enhanced nonlinear absorption (NLA) effect compared with GO and rGO, and thus exhibits an excellent optical limiting (OL) property with very low activating threshold, which is estimated to be about 0.38 J cm−2. The enhanced NLA effect in rGO hybrids makes it possible to fabricate solid-state optical limiter, improving the practicality of graphene materials in the OL area.