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We have devised a new method to enhance the sensitivity of competitive immunoassay using electrokinetic concentration near a pair of highly charge-selective polymer [poly-2-acrylamido-2-methyl-1-propanesulfonic acid (pAMPSA)] plugs on a microfluidic chip. The polyelectrolytic gel, which was photopolymerized in a microfluidic channel network, served as the effective charge-selective extractor to sophisticatedly...
A single gold microshell, which was elaborately fabricated to carry numerous hot spots on its own surface, enabled the acquisition of the SERS spectra from the molecules on non‐SERS active substrates such as Si/SiO2, ITO, and glass. A self‐assembled monolayer of 11‐mercaptoundecanols on the gold microshell offered an easy and reliable way to electrically insulate from the underlying flat Pt electrode...
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