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(2017年4月14日)报告人:Prof. Timothy M. Swager (MIT)
发表时间:2017-04-11 阅读次数:304次

报告题目:Molecular Electronics for Chemical Sensors

 

报 告 人:Timothy M. Swager教授,MIT

 

报告时间:2017年4月14日(星期五)下午13:45—15:00

 

报告地点:化学馆241报告厅

 

 

报告人简介:

 

Prof. Timothy M. Swager 美国国家科学院和美国艺术与科学院双院士,全球前10名大学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。

 

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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