Design of advanced sensing materials

乔治亚理工大学的Jiri Janata和Miroslawa Josowicz教授得到了分析和表面化学项目的支持，研究“化学敏感场效应晶体管”（CHEMFET）。这个想法是调整有机半导体，以优化其电子转移特性，用于气体传感器和信息处理的新型设备。该小组先前利用化学、电化学和光化学手段来改变固体的费米能级，大多数研究集中在聚苯胺上。该小组现在正在追求传感器所需的其他特性，例如，选择层的长期稳定性和快速响应时间。正在探索其他二次掺杂剂的使用，包括离子液体。研制了一种磁性石英晶体微天平（MQCM），用于同时监测磁性自旋密度的变化和固体对质量掺杂的吸收。有机电子学是一个新的技术领域，它提供了传统硅电子学无法实现的广泛应用。然而，理解和控制化学环境因素对于用于信号和信息处理的固态传感器和有机电子器件至关重要。此外，需要新的化学传感器来检测周围的蒸汽。例如，为了国家安全的利益，廉价、耐用和易于制造的气体传感器是必不可少的。

Professors Jiri Janata and Miroslawa Josowicz of Georgia Tech University are supported by the Analytical and Surface Chemistry program to work on "chemically-sensitive field-effect transistors" (CHEMFET). The idea is to tune organic semiconductors for optimization of their electron transfer properties for use as gas sensors and novel devices for information processing. The group has previously utilized chemical, electrochemical and photochemical means to change the Fermi level of the solid, with most studies focusing on polyaniline. The group is now pursuing other properties needed in a sensor, for example, long term stability and fast response time of the selective layer. The use of additional secondary dopants is being explored, including ionic liquids. A magnetic quartz crystal microbalance (MQCM) is being developed to simultaneously monitor changes in magnetic spin density and the mass dopant uptake by the solid. Organic electronics is a new technological area that offers a wide range of applications not feasible with conventional silicon electronics. However, understanding and controlling the chemical environmental factors is critical for both solid-state sensors and organic electronics intended for signal and information processing. Additionally, new chemical sensors are required to detect ambient vapors. Inexpensive, long-lasting and easily manufactured gas sensors are needed in the interest of national security, for example.