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(4月14日)同济大师讲坛第52期

  发表时间:04/13/2017 阅读次数:454

报告题目:Molecular Electronics for Chemical Sensors
人:Prof. Timothy M. Swager教授 (美国国家科学院和美国艺术与科学院双院士,MIT化学系麦肯阿瑟冠名教授,世界顶级化学与环境材料化学专家)
报告时间:2017414日(星期五)下午13:45—15:00
报告地点:化学馆241报告厅

Abstract:
This lecture will detail the creation of ultrasensitive sensors based on electronically active conjugated polymers (CPs) and carbon nanotubes (CNTs). A central concept that a single nano- or molecular-wire spanning between two electrodes would create an exceptional sensor if binding of a molecule of interest to it would block all electronic transport. The use of molecular electronic circuits to give signal gain is not limited to electrical transport and CP-based fluorescent sensors can provide ultratrace detection of chemical vapors via amplification resulting from exciton migration. Nanowire networks of CNTs provide for a practical approximation to the single nanowire scheme. These methods include abrasion deposition and selectivity is generated by covalent and/or non-covalent binding selectors/receptors to the carbon nanotubes. Sensors for a variety of materials and cross-reactive sensor arrays will be described. The use of carbon nanotube based gas sensors for the detection of ethylene and other gases relevant to agricultural and food production/storage/transportation are being specifically targeted and can be used to create systems that increase production, manage inventories, and minimize losses.

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