Noble metal nanoslit by dewetting of thermally activated Au film on CNT
نویسندگان
چکیده
Noble metal nanoslit structure has attracted an increasing interest in nanoscale photonic devices, and bio applications. However, methods typically used for fabricating nano-sized slit, such as, e-beam direct etching, template-assisted photolithography, and nano-imprint lithography, have low yield and are limited to sub-nano sized slit. In this work, we observed that slit width of Au metal is gradually changed with various dewetting temperature, and heating time through solid-state dewetting phenomenon of Au film on Carbon nanotube (CNT). Using this phenomenon, 10-30nm sized slits of Au metal were obtained. In addition, slit size and shape was controlled by dewetting temperature and CNT shape, respectively. It is believed that thermally activated Au atoms above the CNT moved to thiol-group region on the substrate to minimize the surface energy of the Au film.
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