Functionalized few-layered graphene oxide embedded in an organosiloxane matrix for applications in optical limiting
Functionalized few-layered graphene oxide embedded in an organosiloxane matrix for applications in optical limiting
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DOI：
10.1016/j.cplett.2018.11.007
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发表时间：
2019-01-16
影响因子：
2.8
通讯作者：
Curran, Seamus A.
中科院分区：
文献类型：
--
作者：
Maharjan, Surendra;Liao, Kang-Shyang;Curran, Seamus A.
用（3-氨基丙基）三乙氧基硅烷共价官能化少层氧化石墨烯，并使用溶胶-凝胶技术将其并入有机硅氧烷基质中。研究了嵌入有机硅氧烷基质（f-GO/sol）中的官能化少层氧化石墨烯在纳秒范围内的非线性光学和光限幅特性。在Z扫描研究中，由于氧化石墨烯和有机硅氧烷分子的共价交联增加，f-GO/溶胶样品与其氧化石墨烯前体相比表现出上级非线性光学和光学限幅响应。这些显著的改进归因于石墨烯-二氧化硅纳米结构和热生成微等离子体的非线性吸收和非线性散射的组合机制。
Few-layered graphene oxide is covalently functionalized with (3-Aminopropyl) triethoxysilane and incorporated into an organosiloxane matrix using a sol-gel technique. Nonlinear optical and optical limiting properties of functionalized few layered graphene oxide embedded in an organosiloxane matrix (f-GO/sol) are studied in the nanosecond regime at 527 nm. In a Z-scan study, f-GO/sol samples exhibit superior nonlinear optical and optical limiting responses in comparison to their graphene oxide precursor due to increased covalent crosslinking of graphene oxide and organosiloxane molecules. These significant improvements are attributed to the combined mechanisms of nonlinear absorption and nonlinear scattering, due to graphene-silica nanostructures and thermally-generated microplasmas.