A resistive-pulse sensor chip for multianalyte immunoassays |
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Authors: | Carbonaro A Sohn L L |
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Affiliation: | Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA. |
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Abstract: | MultiAnalyte immunoassays are often required to diagnose a pathologic condition. Here, we show how resistive-pulse sensing and multiple artificial pores can be integrated together on a single chip to detect different antigens rapidly and simultaneously. We use multiple pores on a single chip to detect the size change of latex colloids upon specific antigen-antibody binding on the colloid surface. As a proof-of-principle, we demonstrate our ability to detect simultaneously human G-CSF and GM-CSF antigens on a single chip. Our novel technique is a scalable technology that can lead to the sensing of at least N2 antigens simultaneously with an N N array of pores on a single chip. |
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