Nanoporous gold nanoparticle (NPG-NP) array chip showcases tunable pore and ligament sizes ranging from nanometers to microns. The nanoporous structure and sub-wavelength nanoparticle shape contribute to its unique LSPR properties. NPG-NP features large specific surface area and high-density plasmonic field enhancement known as “hot-spots”. Hence, NPG-NP has found many applications in nanoplasmonic sensor development. In our recent studies, we have shown that NPG-NP array chip can be utilized for high-sensitivity detection by various enhanced spectroscopic modalities, as photothermal agents, and for disease biomarker detection. In this paper, we show the first experimental demonstration of effective and robust surface-enhanced near-infrared absorption (SENIRA) on NPG-NP array chip.
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Wei-Chuan Shih, Fusheng Zhao, "Surface-enhanced near-infrared absorption on nanoporous gold nanoparticle array chip (Conference Presentation)," Proc. SPIE 10080, Plasmonics in Biology and Medicine XIV, 1008002 (21 April 2017);