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首页> 外文会议>International Workshop on the Physics of Semiconductor Devices >Surface Enhanced IR Absorption and Raman Detection of Tryptophan Amino Acids Over Silver Nanoislands Deposited on Graphene
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Surface Enhanced IR Absorption and Raman Detection of Tryptophan Amino Acids Over Silver Nanoislands Deposited on Graphene

机译：表面增强的IR吸收和Raman检测色氨酸氨基酸在石墨烯上沉积的银纳米岛

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Surface enhanced IR absorption (SEIRA) and Surface enhanced Raman scattering (SERS) of amino acids in protein (L-Tryptophan) drop coated on deposited silver nanoislands over monolayer of graphene on silicon were obtained using FTIR in reflectance mode and micro-Raman respectively. In this work, two dimensional Ag nanoislands were prepared on LPCVD-grown monolayer graphene on Si. Here we describe the enhanced interaction between light and silver nanoislands deposited on graphene as a tool for trace detection of molecular entities, especially in the area of bio-molecule detection and characterisation. This enhanced interaction is due to localised surface plasmons generated in silver nano islands that we fabricate by simple means of metal deposition on top of graphene. We have achieved femto molar detection limit of L-Tryptophan on monolayer graphene.
机译：使用FTIR分别在反射模式和微拉曼中获得涂覆在沉积的银纳米石墨烯上沉积的银纳米型涂覆的蛋白质（L-色氨酸）下降的蛋白质（L-色氨酸）下落的蛋白质（L-色氨酸）滴加（SERA）和表面增强拉曼散射（SERS）。在这项工作中，在Si上对LPCVD-种植的单层石墨烯制备了二维AG纳米岛。在这里，我们描述了沉积在石墨烯上的光和银纳米岛之间的增强的相互作用作为痕量分子实体的痕量检测的工具，特别是在生物分子检测和表征领域。这种增强的相互作用是由于在银纳米岛中产生的局部方形等离子体，我们通过简单的金属沉积在石墨烯上制造。我们在单层石墨烯上达到了L-色氨酸的毫微微摩尔检测极限。

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