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SUMMARY:Molecular Electronics for Chemical Sensors - Prof. Timothy M. Swag
 er\, Department of Chemistry\, Massachusetts Institute of Technology
DTSTART:20160429T150000Z
DTEND:20160429T160000Z
UID:TALK65054@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:This lecture will detail the creation of ultrasensitive sensor
 s based on electronically active conjugated polymers (CPs) and carbon nano
 tubes (CNTs).  A central concept that a single nano- or molecular-wire spa
 nning between two electrodes would create an exceptional sensor if binding
  of a molecule of interest to it would block all electronic transport.  Th
 e use of molecular electronic circuits to give signal gain is not limited 
 to electrical transport and CP-based fluorescent sensors can provide ultra
 trace detection of chemical vapors via amplification resulting from excito
 n migration. Nanowire networks of CNTs provide for a practical approximati
 on to the single nanowire scheme. These methods include abrasion depositio
 n and selectivity is generated by covalent and/or non-covalent binding sel
 ectors/receptors to the carbon nanotubes.  Sensors for a variety of materi
 als 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 be
 ing specifically targeted and can be used to create systems that increase 
 production\, manage inventories\, and minimize losses.
LOCATION:Wolfson Lecture Theatre\,  Department of Chemistry
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