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SUMMARY:Graphene Nanopores
DTSTART:20100701T110000
DTSTAMP:20260407T064503Z
UID:44b067999525cdd7c61f25e9f3be88084f6d65035b05f3e884302531
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Slaven Garaj\, Department of Physics\, Harvard University\
 nGraphene – atomically thin membrane of sp2-bonded carbon – has been r
 ecently a subject of intense\nresearch\, mainly for its potential electron
 ic applications. Here we present novel aspects of graphene:\nits propertie
 s in ionic solutions\, bio-sensing capabilities\, and its prospects for hi
 gh-throughput\nphysical DNA sequencing.\nWe investigated ionic conductivit
 y perpendicular to the graphene membrane separating two\nreservoirs filled
  with ionic solutions. Despite this membrane being only one atomic layer t
 hick\, we\nfind it is a remarkable ionic insulator\, stable over prolonged
  periods of time and for wide range of\nphysical and chemical parameters. 
 When a nanometer sized pore is fabricated in the graphene\nmembrane\, its 
 conductance increases several orders of magnitude. Using nanopore to local
 ly probe\nthe graphene–liquid interaction\, we showed that the membrane
 ’s effective insulating thickness is\nless than one nanometer. This make
 s the graphene nanopores an ideal platform for a single molecule\ndetector
 \, with potentials for sub-nanometer resolution along the length of the bi
 o-molecule. We\ndemonstrated the feasibility of such device by detecting c
 onformation of many individual DNA\nmolecules.
LOCATION:PHL1503
STATUS:CONFIRMED
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