首页 | 本学科首页   官方微博 | 高级检索  
     

通过光致还原调制氧化石墨烯寿命并用于微纳图形制备
引用本文:乔志星,秦成兵,贺文君,弓亚妮,张晓荣,张国峰,陈瑞云,高岩,肖连团,贾锁堂. 通过光致还原调制氧化石墨烯寿命并用于微纳图形制备[J]. 物理学报, 2018, 67(6): 66802-066802. DOI: 10.7498/aps.67.20172331
作者姓名:乔志星  秦成兵  贺文君  弓亚妮  张晓荣  张国峰  陈瑞云  高岩  肖连团  贾锁堂
作者单位:1. 山西大学激光光谱研究所, 量子光学与光量子器件国家重点实验室, 太原 030006;2. 山西大学极端光学协同创新中心, 太原 030006
基金项目:国家自然科学基金(批准号:U1510133,61527824,11374196,61675119,11434007,1504216,61605104)、长江学者与创新团队发展计划(批准号:IRT13076)和山西省"1331工程"重点学科建设资助的课题.
摘    要:氧化石墨烯因其宽带可调谐的荧光发射特性已被广泛应用于荧光成像、金属离子高灵敏检测和光电器件的制备.相比于荧光强度,氧化石墨烯荧光寿命不受材料厚度和激发功率的影响,具有更为稳定和均一的特性.本文研究了在激光还原过程中氧化石墨烯荧光寿命逐渐减小的变化行为,发现了长寿命sp~3杂化结构向短寿命sp~2杂化结构的转变.通过精确控制还原时间,结合激光直写技术,在单层氧化石墨烯薄膜上实现了二维码、条形码、图形和数字等微纳图形的制备,还在多层氧化石墨烯薄膜结构上获得了多寿命多层微纳图形.这种微纳图形的制备具有灵活无掩膜、高对比和多模式的特点,可用于高密度光学存储、信息显示和光电器件制备等诸多领域.

关 键 词:氧化石墨烯  荧光寿命  微纳图形  激光直写
收稿时间:2017-10-29

Lifetime modulation of graphene oxide film by laser direct writing for the fabrication of micropatterns
Qiao Zhi-Xing,Qin Cheng-Bing,He Wen-Jun,Gong Ya-Ni,Xiao Lian-Tuan,Zhang Guo-Feng,Chen Rui-Yun,Gao Yan,Xiao Lian-Tuan,Jia Suo-Tang. Lifetime modulation of graphene oxide film by laser direct writing for the fabrication of micropatterns[J]. Acta Physica Sinica, 2018, 67(6): 66802-066802. DOI: 10.7498/aps.67.20172331
Authors:Qiao Zhi-Xing  Qin Cheng-Bing  He Wen-Jun  Gong Ya-Ni  Xiao Lian-Tuan  Zhang Guo-Feng  Chen Rui-Yun  Gao Yan  Xiao Lian-Tuan  Jia Suo-Tang
Affiliation:1. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China;2. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract:The strong, broad and tunable fluorescence emission of graphene oxide (GO) has shown the exciting optical applications in many areas, such as fluorescence imaging in living cell, high sensitive detection of heavy metal ions, and the fabrication of optoelectronic devices. However, the intrinsic heterogeneous fluorescence intensity resulting from the variability in the power density of excitation laser and the non-uniform thickness of GO film, hinders its further applications in the micropatterning, information storage and display technology, which requires homogeneous fluorescence emission. In contrast to the fluorescence intensity, the fluorescence lifetime of GO is determined by the intrinsic nature of chromophores, rather than the film thickness or excitation power density. Here we report that the fluorescence lifetime is homogeneous for GO film, which eliminates the anisotropic optical properties of GO film. By reducing the GO film through the irradiation from a 405 nm continuous-wave laser at a certain power density on a home-built scanning confocal microscope, we find that the lifetime can be precisely modulated by controlling the duration of laser irradiation. It is determined that the lifetime gradually decreases with the increase of duration. As reported in the previous researches, the GO fluorescence originates from the graphene-like confined sp2 clusters and sp3 domains consisting of oxygen-containing functional groups, where the lifetime of sp3 domain is about 1.4 ns, and that of sp2 domain is 0.14 ns. During the photoreduction, the long-lived sp3 domains will decrease or convert into short-lived sp2 domains, resulting in the decrease of lifetime. Hence, by controlling the reduction degree or the ratio of the two domains, the lifetime of GO film can be determined. More importantly, the lifetime distributions of the reduction areas are very narrow, leading to a relatively homogenous background. The precise manipulation of lifetime can be used to fabricate micropatterns with high contrast. Combining with laser direct writing with features of maskless, facile processing ability and high spatial resolution, many versatile micropatterns, such as quick response code, barcode, graphic, alphabet, and numbers can be readily created based on the modulation of fluorescence lifetime. By using three optimized durations of laser irradiation, three distributions with narrow widths are obtained. Based on this processing, the micropatterns with three colors are determined, which indicates that the multimode optical recording can be created on the GO film based on the modulation of fluorescence lifetime. Furthermore, the multilayer micropatterns are also created. The robust and versatile micropatterns with film-thickness and excitation-power-independent features show their promising applications in electronics, photonics, display technology and information storage.
Keywords:graphene oxide  fluorescence lifetime  micropatterns  laser direct writing
本文献已被 CNKI 等数据库收录!
点击此处可从《物理学报》浏览原始摘要信息
点击此处可从《物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号