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FTIR transmittance spectra of SiO2 nanoparticles (a) in the full IR region and (b) in the fingerprint region. The inset of (a) shows the TEM image of SiO2 nanoparticles.
(Color online) FTIR-RA spectra of SiO2 nanoparticles at incidence angle of (a) 60°, (b) 70°, (c) 80°, and (d) 85°.
FTIR-RA spectrum from the sandwich-structured immunoassay system (40 nM human IgG).
(Color online) Schematic of (a) the preparation of the analyte/probe complex, (b) the immobilization of protein on gold substrate, and (c) SiO2 nanoprobe based immunoassay process.
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