alexa SERS substrate for detection of explosives.
Chemistry

Chemistry

Chemical Sciences Journal

Author(s): Chou A, Jaatinen E, Buividas R, Seniutinas G, Juodkazis S,

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Abstract A novel gold coated femtosecond laser nanostructured sapphire surface - an "optical nose" - based on surface-enhanced Raman spectroscopy (SERS) for detecting vapours of explosive substances was investigated. Four different nitroaromatic vapours at room temperature were tested. Sensor responses were unambiguous and showed response in the range of 0.05-15 μM at 25 °C. The laser fabricated substrate nanostructures produced up to an eight-fold increase in Raman signal over that observed on the unstructured portions of the substrate. This work demonstrates a simple sensing system that is compatible with commercial manufacturing practices to detect taggants in explosives which can undertake as part of an integrated security or investigative mission. This article was published in Nanoscale and referenced in Chemical Sciences Journal

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