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UID:69d3729497d19
DTSTAMP:20260406T044508
DTSTART:20110112T113000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20110112T130000
URL:https://murmitoyen.com/events/vanille/udem/detail/32334
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Electronic Nanosensors on a Viral Scaffold
DESCRIPTION:Cette conférence sera prononcée par la professeure Amy Blum 
 du Département de chimie de l'Université McGill. Elle sera donnée en an
 glais.Résumé : Significant challenges exist in assembling the building 
 blocks of a nanoscale device. Self-assembly is  one of the few practical 
 strategies for making ensembles of nanostructures and will therefore be an
  essential part of nanotechnology. In order to generate complex structure
 s through self-assembly\, it is essential to develop methods by which diff
 erent components in solution can come together in an ordered fashion. As b
 iological interactions are better understood\, there has been interest in 
 using the specificity and strong interactions present in biology to organi
 ze and orient inorganic components to create new materials. Using viruses 
 as nanoscale scaffolds for devices offers the promise of exquisite control
  over positioning nanoscale components on a protein scaffold that also all
 ows further self assembly of the nanoscale devices. Using Cowpea Mosaic Vi
 rus\, modified to express cysteine residues on the capsid exterior\, nanop
 articles were attached to the viral scaffold in a pattern to produce speci
 fic interparticle distances. The nanoparticles were then interconnected us
 ing thiol-terminated conjugated organic molecules that can act as “molec
 ular wires”\, resulting in a three-dimensional spherical conductive netw
 ork that is only 30 nm in diameter. We demonstrate that conductance chang
 es in such molecular networks can be useful for chemical sensing.    Info
 rmation supplémentaire
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