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Highly ordered graphene architectures by duplicating melamine sponges as a three-dimensional deformation- tolerant electrode

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分类：O657.37[理学—分析化学;理学—化学] O614.122[理学—无机化学;理学—化学]
作者机构：[1]State Key Laboratory of Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China, [2]Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Tech nological University, 21 Nanyang Link, Singapore 637371, Singapore, [3]State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
相关基金：Acknowledgement The authors are grateful for the financial support from the National Natural Science Foundation of China （Nos. 51125011, 51433001）, and the National Research Foundation, Singapore （No. NRF-NRFF2012-04）, Nanyang Technological University＇s start-up grant.

作者： Le Li Kai Wang Zhaoqi Huang Chao Zhang Tianxi Liu

关键词：表面增强拉曼散射, 银纳米粒子, 氧化石墨, 混合, SERS活性, 氧化物, 立方形, 自由站, graphene, nanostructures, Ag nanocubes, flee-standing, SERS enhancement

中文摘要：

提高表面的拉曼光谱学(重量的单位) 作为一个强大的分析工具获得了广泛的注意。尽管有在重量的单位底层的设计的许多努力，它为与长期的稳定性和可再现的重量的单位信号创造通用底层仍然是大挑战。在这个工作， Ag nanocubes 和 graphene 氧化物(去) 暂停被混合形成稳定的溶液，进一步的真空过滤了获得一份自立的混合报纸。因为 Ag nanocubes 的 synergistic 效果， Ag/GO 混合报纸展出优秀重量的单位活动并且去表。去表能为支持 Ag nanocubes 充当两重量的单位改进底层和框架。而且，去表能为延长生活时间重量的单位在周围的状况下面保护 Ag nanoparticles 免受氧化的伤害底层。而且，我们表明自立、灵活的 Ag/GO 混合的纸的使用在水的系统启用 analytes 的踪迹数量的直接、即时、可靠的察觉。这新奇重量的单位底层被期望在即时分析被使用并且在材料和生命科学为有用应用扩展重量的单位的灵活性。

英文摘要：

Surface-enhanced Raman spectroscopy （SERS） as a powerful analytical tool has gained extensive attention. Despite of many efforts in the design of SERS substrates, it remains a great challenge for creating a universal sub- strate with long-term stability and reproducible SERS signals. In this work, Ag nanocubes and graphene oxide （GO） suspension were mixed to form a stable solution and further vacuum filtrated to obtain a free-standing hybrid paper. The Ag/GO hybrid papers exhibit excellent SERS activity because of the synergistic effect of Ag nanocubes and GO sheets. GO sheets can act as both SERS enhancement substrate and framework for supporting Ag nanocubes. Moreover, GO sheets can protect Ag nanoparticles from oxidation under ambient condition for prolonged life time SERS substrate. Furthermore, we demonstrate the use of the free-standing and flexible Ag/GO hybrid paper to en- able direct, real-time and reliable detection of trace amounts of analytes in aqueous systems. This novel SERS sub- strate is expected to be applied in real-time analysis and expands the flexibility of SERS for useful applications in the materials and life science.