Abstract
A microfluidic chip integrated with pneumatically controlled valves was developed for multiplexed biomolecular detection via localized surface plasmonic resonance (LSPR) of single gold nanorod. The cost-effective microfluidic chip was assembled by polydimethylsiloxane layers and glass substrates with a precisely controlled thickness. The thin and flat microfluidic chip fitted the narrow space of dark-field microscopy and enabled the recording of single-nanoparticle LSPR responses. Aptamer-antigen-antibody sandwiched detection scheme was utilized to enhance the LSPR responses for label-free biomolecular detection. This microfluidic chip successfully demonstrated the multiplexed detection of three independent analytes (PSA, IgE, and thrombin).
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We gratefully thank financial support from the Ministry of Education of Singapore (MOE2012-T2-1-058).
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Wu, B., Chen, LC., Huang, Y. et al. Multiplexed Biomolecular Detection Based on Single Nanoparticles Immobilized on Pneumatically Controlled Microfluidic Chip. Plasmonics 9, 801–807 (2014). https://doi.org/10.1007/s11468-013-9661-4
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DOI: https://doi.org/10.1007/s11468-013-9661-4