Novel blue light emitting graphene oxide nanosheets fabricated by surface functionalization
Novel blue light emitting graphene oxide nanosheets fabricated by surface functionalization
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DOI：
10.1039/c1jm14174k
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Chen, Wei
中科院分区：
文献类型：
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作者：
Lu, Yizhong;Jiang, Yuanyuan;Chen, Wei
石墨烯和氧化石墨烯（GO）因其独特的物理和化学性质以及在光学和电子学中的潜在应用而受到越来越多的关注。然而，无带隙结构极大地限制了它们在光电器件中的广泛应用。表面功能化被发现是调节石墨烯和GO性能的有效方法。在本报告中，通过用2-氨基蒽的芳基重氮盐对GO表面进行功能化，制备了具有蓝光发射的GO杂化材料。使用原子力显微镜（AFM）、X射线光电子能谱（XPS）、傅里叶变换红外光谱（FTIR）、拉曼光谱和紫外-可见吸收光谱对所得杂化物进行了仔细表征。与单体 2-氨基蒽的青色发射（类似于 491 nm）显着不同，合成的 GO 杂化复合材料表现出以 ca 为中心的强蓝色光致发光。 400纳米。从功能化的 GO 获得的发光（类似于 91 nm）的大蓝移可能部分归因于严格的化学环境，其中蒽基部分化学键合到 GO 表面。这种具有独特光学特性的表面功能化GO杂化材料使其成为令人兴奋的光电器件材料。
Graphene and graphene oxide (GO) attract increasing attention due to their unique physical and chemical properties and thus the potential applications in optics and electronics. However, the gapless band structure greatly limits their wide applications in opto-electronic devices. Surface functionalization was found to be an effective method to tune the properties of graphene and GO. In the present report, GO hybrid materials with blue-emission were fabricated through the GO surface functionalization with aryl diazonium salts of 2-aminoanthracene. The obtained hybrids were carefully characterized with atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), Fourier-transformed infrared spectroscopy (FTIR), Raman spectroscopy and UV-Vis absorption spectroscopy. Significantly different from the cyan emission (similar to 491 nm) of monomeric 2-aminoanthracene, the as-synthesized GO hybrid composites exhibited strong blue photoluminescence centered at ca. 400 nm. The large blue shift of the luminescence (similar to 91 nm) obtained from the functionalized GO could be partly ascribed to the rigid chemical environment with anthryl moieties chemically bonded onto GO surface. Such surface-functionalized GO hybrids with unique optical properties render them exciting materials for opto-electronic devices.