Chemical Sensors Based on Novel, Ultrathin Organic Coatings

该项目由德克萨斯农工大学的Richard Crooks教授实施，由分析和表面化学项目资助，涉及设计、合成、表征和表面固定化新型有机材料，旨在作为阵列传感器中的化学敏感器件。有机材料是本提案的重点是超支化聚合物薄膜和枝状聚合物。基于树枝状单层的气相化学传感器具有表面声波质量平衡的特征。固定膜的化学灵敏度与枝晶结构的物理性质和预期设计相关，并且将进行迭代以实现所需的化学选择性。这些薄膜阵列用于挥发性有机化合物的测定将在合作努力中探索。我们探索了一种组合化学方法来制备用于传感的新有机化合物，并探索了一种保持选择性和保护表面不受毒害的双层膜固定的新方法。化学传感器的有用性取决于传感器表面材料的特异性。德克萨斯农工大学的Richard Crooks教授的这项工作开发了具有可预测特异性和更好响应的新型高度分支材料。一种将材料连接到传感器表面以保护传感膜免受损坏和中毒的方法也正在开发中。

This project, carried out by Professor Richard Crooks at Texas A&M University, and funded by the Analytical and Surface Chemistry Program, involves the design, synthesis, characterization, and surface immobilization of new organic materials intended to serve as chemically sensitive devices in array-based sensors. The organic materials that are the focus of this proposal are hyberbranched polymer films and dendritic polymers. Vapor phase chemical sensors based on dendritic monolayers are characterized by surface acoustic wave mass balances. The chemical sensitivities of the immobilized films are correlated with the physical properties and intended design of the dendritic structure, and an iteration to achieve the desired chemical selectivity will be pursued. Use of these thin films in arrays for volatile organic compound determinations will be explored in collaborative efforts. A combinatorial chemistry approach to the preparation of new organic compounds to be used for sensing is explored, and a novel means for bilayer film immobilization that preserves selectivity and protects the surface from poisoning is also pursued.The usefulness of chemical sensors depends on the specificity of the material on the surface of the sensor. This work by Professor Richard Crooks of Texas A&M University develops new highly branched materials with predictable specificities and better responses. A means to connect the material to the sensor surface that protects the sensing film from damage and poisoning is also being developed.