EXP-SA: Ultra Sensitive Organic Transistor Based Explosives Detector

题目：EXP-SA：基于超灵敏有机晶体管的爆炸物探测器斯坦福大学，深圳，bao0730710智力优点：有机单层晶体管对于爆炸性化学气体的超灵敏探测具有吸引力。通过使用单分子层作为活性有机半导体层，暴露于爆炸性化学品的影响很容易被感知，并且可以导致电流比使用更厚的有机半导体层时更剧烈的变化。目前，这种晶体管是用昂贵的电子束光刻技术制造的，因为自组装的单层只能形成小的有序畴。本研究旨在了解爆炸化学传感应用所需的有机半导体材料要求和设计规则。该项目探索了几种有效可靠地制造大型单层晶体管阵列的方法，包括一种通过简单的旋转涂层形成大型有序单层的新方法，Langmuir Blodgett薄膜方法，以及使用Dip Pen纳米光刻技术将电极直接写入真空蒸发有机半导体单层上。该项目随后调查了这种薄膜的传感能力。该项目还设计和合成了新的有机半导体或结合位点，可以提高检测强氧化性或还原性爆炸性化学品的单层晶体管传感器的灵敏度和选择性。更广泛的影响：该研究有可能显著提高对用于爆炸性化学检测的有机半导体材料的理解。以单层晶体管传感器为测试平台，设计、合成并表征了一类具有高性能和鲁棒性的新型材料。参与该项目的研究生和本科生将具备技术工程技能，基本科学理解和沟通技巧的组合，为他们为传感器技术的前沿做出贡献做好准备。

TITLE: EXP-SA: Ultra Sensitive Organic Transistor Based Explosives DetectorStanford UniversityZhenan Bao0730710Intellectual Merit: Organic monolayer transistors are attractive for ultra-sensitive detection of explosive chemical vapors. By using a mono-molecular layer as the active organic semiconductor layer, the effect of exposure to explosive chemicals is readily sensed and can lead to a much more dramatic change in the current flow than when a thicker organic semiconductor layer is used. Currently, such transistors are being fabricated using expensive electron beam lithography because only small ordered domain sizes are formed from self assembled monolayers. This research seeks to understand the materials requirements and design rules for organic semiconductors needed for explosive chemical sensing applications. The project pursues several methods to efficiently and reliably fabricate large arrays of monolayer transistors, including a new method for forming large ordered monolayers by simple spin-coating, Langmuir Blodgett film approach, and direct writing of electrodes onto vacuum evaporated organic semiconductor monolayers using Dip Pen Nanolithography. The project then investigates the sensing capability of such films. The project also designs and synthesizes new organic semiconductors or binding sites that can improve the sensitivity and selectivity of the monolayer transistor sensors for the detection of strongly oxidizing or reducing explosive chemicals.Broader Impact: The research has the potential to significantly improve the understanding of organic semiconductor materials for explosive chemical detection. A new class of materials with high performance and robust properties is being designed, synthesized, and characterized using monolayer transistor sensor as a test bed. Graduate and undergraduate students involved in the project will be equipped with a combination of technical engineering skills, basic scientific understanding, and communication skills to prepare them to contribute to the forefront of sensor technology.