Fabricating Nanogaps between Nanoelectrodes using Dielectrophoresis Technique for Molecular Fluorescence Enhancement |
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| Authors: | Qiu-shi Meng Hong-bing Cai Ke Lin San-e Zhu Yuan Liao Yang Zhang Xiao-ping Wang Zhen-chao Dong |
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| Affiliation: | Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | Here we demonstrate the fabrication of nanometer-sized gaps by assembling single coreshell nanoparticles between metallic nanoelectrodes. Protein coated SiO2@Au coreshell nanoparticles are synthesized and positioned between uorescent molecules-covered electrodes in a controllable way using dielectrophoretic trapping, forming nanogaps sandwiched between nanoparticle and nanoelectrodes. Preliminary photoluminescence measurements show that enhanced molecular uorescence could be detected from the uorescent molecules inside the nanogaps. These results pave the way for realizing electrically driven molecular uorescence based on nanogap electrodes. |
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| Keywords: | Nanogap Nanoelectrode Dielectrophoresis Coreshell nanoparticle Fluorescence enhancement |
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