One-step synthesis of graphene-Au nanoparticle hybrid materials from metal salt-loaded micelles
One-step synthesis of graphene-Au nanoparticle hybrid materials from metal salt-loaded micelles
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由负载金属盐的胶束一步合成石墨烯-Au纳米颗粒杂化材料
DOI：
10.1088/0957-4484/25/36/365602
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发表时间：
2014-09-12
期刊：
影响因子：
3.5
通讯作者：
Gao, H. L.
中科院分区：
文献类型：
--
作者：
Liu, X.;Zhang, X. W.;Gao, H. L.
在这项研究中，我们提出了一个简单的一步法合成石墨烯-金纳米粒子（NP）杂化材料使用HAuCl 4负载聚（苯乙烯）-嵌段-聚（2-乙烯基吡啶）（PS-P2 VP）胶束作为固体碳源。通过退火工艺，在PS-P2 VP胶束表面覆盖Ni覆盖层，生长出厚度可控的N掺杂石墨烯;同时，在还原气氛下，胶束中的HAuCl 4被还原为Au NPs，在石墨烯上形成Au NPs。Au NPs的修饰使石墨烯的电导率明显提高，同时由于电子转移效应，石墨烯的功函数略有增加。石墨烯-Au NP杂化材料还表现出Au NP的局部表面等离子体共振特征。本工作为一步合成高质量的石墨烯-金纳米粒子杂化材料提供了一条新的可行路线，这可能有助于未来在光电器件中的应用。
In this study, we present a facile one-step method to synthesize graphene-Au nanoparticle (NP) hybrid materials by using HAuCl4-loaded poly(styrene)-block-poly(2-vinylpyridine) (PS-P2VP) micelles as solid carbon sources. N-doped graphene with controllable thickness can be grown from PS-P2VP micelles covered by a Ni capping layer by an annealing process; simultaneously, the HAuCl4 in the micelles were reduced into Au NPs under a reductive atmosphere to form Au NPs on graphene. The decoration of Au NPs leads to an obviously enhanced electrical conductivity and a slightly increased work function of graphene due to the electron transfer effect. The graphene-Au NP hybrid materials also exhibit a localized surface plasmon resonance feature of Au NPs. This work provides a novel and accessible route for the one-step synthesis of graphene-Au NP hybrid materials with high quality, which might be useful for future applications in optoelectronic devices.