SENSORS: Maximization of Electronic Sensitivity and Selectivity of Organic Semiconductors Through Complexation and Film Architecture

0528472 Katz的主要目标是创建具有增强的灵敏度和选择性的有机场效应晶体管的医疗和军事相关的蒸汽。 将制备具有共价结合受体的有机半导体膜。 选择性分析物进入受体将通过膜生长过程中的表面能和热效应产生的设计形貌来控制。 电响应应该是非常迅速的，并且将由结合事件的静电控制;建模将指导受体的设计和放置。 膦酸酯、胺和羰基官能化的分析物将与晶体管半导体中的氢键和有机金属受体相互作用，以改变器件的电流-电压关系。 自提交以来的初步结果表明，晶体管对膦酸盐敏感，膦酸盐结合到有机金属受体。 目前的稳定性和再现性也大大提高了先前发表的工作。这是第一次，静电和地形特征被协同设计到有机半导体检测特定的分析物。 将开发新的化学、工艺序列和有机固态材料。 这些设备将与JHU应用物理实验室合作，与完整的传感器系统集成，从而实现强大的技术。 调查将形成至少一个研究生论文的主体。 传感实验也将被纳入PI指导的本科实验室课程，“材料的电子特性”，其中技术增强和研究连接正在添加与JHU的支持。 最终，他将满足社会需求，以大面积和低成本感测指示医疗状况，安全威胁和工业工厂状态的环境蒸汽。

0528472KatzThe principal objective is to create organic field-effect transistors with enhanced sensitivity and selectivity for vapors of medical and military relevance. Organic semiconductor films with covalently bound receptors will be prepared. Selective analyte access to receptors will be controlled by designed topography resulting from surface energy and thermal effects during film growth. Electrical response should be very rapid, and will be governed by electrostatics of binding events; modeling will guide design and placement of receptors. Phosphonate-, amine-, and carbonyl-functionalized analytes will interact with hydrogen-bonding and organometallic receptors in transistor semiconductors to alter device current-voltage relationships. Preliminary results since submission demonstrate transistor sensitivity to phosphonate, and phosphonate binding to an organometallic receptor. Current stability and reproducibility have also been greatly improved over prior published work.This is the first time that electrostatic and topographic features are being designed synergistically into organic semiconductors for detection of specific analytes. New chemistry, process sequences, and organic solid state materials will be developed. Devices will be integrated with complete sensor systems in collaboration with JHU Applied Physics Laboratory, leading to a robust technology. The investigation will form the body of at least one graduate student thesis. The sensing experiments will also be incorporated into a PI-directed undergraduate laboratory course, "Electronic Properties of Materials", in which technology enhancements and research connections are being added with JHU support. Ultimately, he will meet the societal need to sense environmental vapors indicating medical conditions, security threats, and industrial plant status, over large areas and at low cost.