LSPR Biosensor Signal Enhancement Using Nanoparticle-Antibody Conjugates.
LSPR Biosensor Signal Enhancement Using Nanoparticle-Antibody Conjugates.
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LSPR生物传感器信号使用纳米颗粒 - 抗体结合物增强。
DOI:
10.1021/jp106912p
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发表时间:
2011-02-10
影响因子:
3.7
通讯作者:
Van Duyne, Richard P.
中科院分区:
文献类型:
--
作者:
Hall, W. Paige;Ngatia, Salome N.;Van Duyne, Richard P.
A method to amplify the wavelength shift observed from localized surface plasmon resonance (LSPR) bioassays is developed using gold nanoparticle-labeled antibodies. The technique, which involves detecting surface-bound analytes using gold nanoparticle conjugated antibodies, provides a way to enhance LSPR shifts for more sensitive detection of low-concentration analytes. Using the biotin and antibiotin binding pair as a model, we demonstrate up to a 400% amplification of the shift upon antibody binding to analyte. In addition, the antibody-nanoparticle conjugate improves the observed binding constant by 2 orders of magnitude, and the limit of detection by nearly 3 orders of magnitude. This amplification strategy provides a way to improve the sensitivity of plasmon-based bioassays, paving the way for single molecule-based detection and clinically relevant diagnostics.
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