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- W1977703514 abstract "The atomically thin nature of graphene makes it an ideal translocation membrane for high resolution, high throughput, single-molecule DNA sequencing based on nanopores. The conventional approach to creating nanopores on graphene requires a high-resolution electron beam sculpting/drilling process, which often suffers from process variability, precluding the platform from being scalable. Here, we report the formation of integrated graphene nanopores with self-aligned plasmonic optical antennae by photothermal sculpting. We show that a nanometer-sized heated spot created by photon-to-heat conversion (i.e., photothermal effect) of a gold nanorod resting on a graphene membrane forms a nanoscale pore with a self-integrated optical nanoantenna in a single step. The unique interface of graphene nanopore-plasmonic optical antenna is composed of a nanopore with a smallest achievable dimension of a few nanometers and a hemispherical gold nanoparticle located adjacent to the nanopore. The distinct plasmonic traits of metal nanoparticles, which concentrate micron-sized light into nanoscale regions, yield the significant advantage of parallel nanopore fabrication compared to the conventional sequential process using an electron beam. In addition, we achieve tunability of both the nanopore dimensions and the optical characteristics of plasmonic nanoantennae by controlling laser fluence and the dimension of nanoparticles. Finally, the optical function of our self-aligned plasmonic nanoantenna on graphene nanopore is manifested by multifold fluorescent signal enhancement during single lambda phage DNA translocation through a graphene nanopore. We believe our approach to forming an integrated graphene nanopore with self-aligned optical antenna could potentially offer a new avenue and advances for nanopore-based simultaneous electrical and optical DNA sequencing." @default.
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- W1977703514 date "2014-01-01" @default.
- W1977703514 modified "2023-09-27" @default.
- W1977703514 title "Graphene Nanopore with Self-Aligned Plasmonic Optical Antenna" @default.
- W1977703514 doi "https://doi.org/10.1016/j.bpj.2013.11.2330" @default.
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