Upconversion nanoparticles induce the reduction of graphene oxide for nanoscale optical writing

S. Lamon, Yiming Wu, Qiming Zhang, Xiaogang Liu, M. Gu
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Abstract

Nanoscale optical writing enables high-density optical data storage. However, current techniques usually require high laser beam intensity with high energy consumption and short device lifetime. Upconversion nanoparticles (UCNPs) have shown great potential for high-density optical data storage due to their exceptional luminescence emissions. In addition, UCNPs have enabled low-power STED microscopy. We show that UCNPs can induce the reduction of graphene oxide (GO) at the nanoscale. Dual-beam super-resolution irradiation was used to write features in UCNP-conjugated GO with lateral feature size at the nanoscale and inhibition intensity of <15 MW/cm^2. This approach might offers a convenient and energy-efficient solution for the storage demands in the Data Age.
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上转换纳米颗粒诱导氧化石墨烯的还原用于纳米级光学书写
纳米级光写入实现了高密度的光数据存储。然而,目前的技术通常需要高光束强度、高能量消耗和短器件寿命。上转换纳米粒子(UCNPs)由于其特殊的发光特性,在高密度光学数据存储方面显示出巨大的潜力。此外,UCNPs使低功率STED显微镜成为可能。我们发现UCNPs可以在纳米尺度上诱导氧化石墨烯(GO)的还原。采用双光束超分辨率辐照在ucnp共轭氧化石墨烯中写入特征,横向特征尺寸为纳米级,抑制强度<15 MW/cm^2。这种方法可以为数据时代的存储需求提供一种方便和节能的解决方案。
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