Plasmonic photocatalytic processes typically use the interaction of light with metallic nanoparticles to drive chemical reactions on their surfaces. Here we show that a plasmonic photocatalyst can also induce a reaction on an adjacent material. A combination of spontaneous H₂ dissociation and plasmon-induced H desorption from tilted palladium (Pd) nanocones yields reactive H atoms which, in the direct vicinity of a graphene monolayer, results in its local hydrogenation. The conversion of pristine to hydrogenated graphene, a semiconductor, is detectable by visible local fluorescence of the hydrogenated regions of the graphene sheet, as well as by Raman spectroscopic analysis. These results may lead to new approaches for local, light-driven functionalization of graphene and other 2D materials and for precision patterning of functional devices.

中文翻译：

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钯纳米锥对石墨烯的光催化加氢

等离子体光催化过程通常利用光与金属纳米颗粒的相互作用来驱动其表面上的化学反应。在这里，我们表明等离激元光催化剂还可以在相邻的材料上引发反应。自发H _2的组合倾斜的钯（Pd）纳米锥的解离和等离激元诱导的H解吸产生反应性H原子，该反应性H原子在石墨烯单层的直接附近导致其局部氢化。通过石墨烯片的氢化区域的可见局部荧光以及拉曼光谱分析，可以检测到原始碳氢化合物向氢化的石墨烯（一种半导体）的转化。这些结果可能会为石墨烯和其他2D材料的局部光驱动功能化以及功能器件的精确图案化带来新方法。