Simone Lamon,1,2 Yiming Wu,3 Qiming Zhang,1 Xiaogang Liu,3,4 Min Gu1,2
1Univ. of Shanghai for Science and Technology (China) 2RMIT Univ. (Australia) 3National Univ. of Singapore (Singapore) 4The No.1 Institute for Health (Singapore)
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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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