alexa A whole blood immunoassay using gold nanoshells.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Hirsch LR, Jackson JB, Lee A, Halas NJ, West JL

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Abstract A rapid immunoassay capable of detecting analyte within complex biological media without any sample preparation is described. This was accomplished using gold nanoshells, layered dielectric-metal nanoparticles whose optical resonance is a function of the relative size of its constituent layers. Aggregation of antibody/nanoshell conjugates with extinction spectra in the near-infrared was monitored spectroscopically in the presence of analyte. Successful detection of immunoglobulins was achieved in saline, serum, and whole blood. This system constitutes a simple immunoassay capable of detecting sub-nanogram-per-milliliter quantities of various analytes in different media within 10-30 min.
This article was published in Anal Chem and referenced in Journal of Nanomedicine & Nanotechnology

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