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SUMMARY:Molecular Electronics for Chemical Sensors
DTSTART:20130304T131500
DTSTAMP:20260512T015616Z
UID:36b9052578b98158d944f517dd38a4cf741f3af7bc9fcb19c19d7932
CATEGORIES:Conferences - Seminars
DESCRIPTION:Tim Swager\, MIT\nBio : Timothy M. Swager is the John D. MacAr
 thur Professor of Chemistry at the Massachusetts Institute of Technology. 
 A native of Montana\, he received a BS from Montana State University in 19
 83 and a Ph.D. from the California Institute of Technology in 1988. After 
 a postdoctoral appointment at MIT he was on the chemistry faculty at the U
 niversity of Pennsylvania and returned to MIT in of 1996 as a Professor of
  Chemistry and served as the Head of Chemistry from 2005-2010. He has publ
 ished more than 300 peer-reviewed papers and 48 issued/pending patents. Sw
 ager’s honors include: The John Scott Award\, Election to the National A
 cademy of Sciences\, an Honorary Doctorate from Montana State University\,
  the Lemelson-MIT Award for Invention and Innovation\, Election to the Ame
 rican Academy of Arts and Sciences\, the Christopher Columbus Foundation H
 omeland Security Award\, and The Carl S. Marvel Creative Polymer Chemistry
  Award (ACS).\nSwager’s research interests are in design\, synthesis\, a
 nd study of organic-based electronic\, sensory\, high-strength and liquid 
 crystalline materials. In the field of liquid crystals he developed new de
 signs based upon shape complementarity to generate specific interactions b
 etween molecules and has recently developed fundamental mechanisms for inc
 reasing the order in liquid crystals by a new mechanism referred to as min
 imization of free volume.  Swager’s research in electronic polymers has
  been mainly directed at the demonstration of new conceptual approaches to
  the construction of sensory materials. These methods are the basis of the
  FidoTM explosives detectors (FLIR Systems Inc)\, which have the highest s
 ensitivity of any explosives sensor. Other areas actively investigated by 
 the Swager group include radicals for dynamic nuclear polarization\, appli
 cations of nano-carbon materials\, organic photovoltaic materials\, polyme
 r actuators\, and luminescent molecular probes for medical diagnostics.\nT
 his lecture will detail the creation of ultrasensitive sensors based on el
 ectronically 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. Nanowire networks
  of CNTs provide for a practical approximation to the single nanowire sche
 me. A number of functionalization routes to create selective sensors for s
 mall molecules as well as biomolecules will be presented. New methods for 
 fabrication using solventless deposition methods will be described that al
 low for economical flexible sensor fabrication. These methods include abra
 sion deposition and selectivity is generated by covalent and/or non-covale
 nt binding selectors/receptors to the carbon nanotubes. Sensors for a vari
 ety of materials and cross-reactive sensor arrays will be described. The u
 se of carbon nanotube based gas sensors for the detection of ethylene and 
 other gases relevant to agricultural and food production/storage/transport
 ation are being specifically targeted.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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