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The photodissociation of the amide bond by UV light and soft x-rays is investigated by x-ray absorption spectroscopy at the C, N, and O 1s edges. Irradiation leaves a clear and universal signature for a wide variety of amides, ranging from oligopeptides to large proteins and synthetic polyamides, such as nylon. As the π∗ peak of the amide bond shrinks, two(More)
Many molecular species presented at surfaces can be reported by LCs, including small organic molecules and large biomol-ecules such as proteins [1, 2]. By combining the use of LCs with surfaces engineered to have nanoscopic topography and well-defined surface chemistry, we have demonstrated the detection of unla-beled proteins at sensitivity limits ≤ 1(More)
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