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SUMMARY:Graphene Nanopores
DTSTART:20100701T110000
DTSTAMP:20260408T034842Z
UID:c707f41f34d8ace16ec3bad0641a826d083f8c57fb4e149655826c73
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Slaven Garaj\nGraphene – atomically thin membrane of sp2
 -bonded carbon – has been recently a subject of intense\nresearch\, main
 ly for its potential electronic applications. Here we present novel aspect
 s of graphene:\nits properties in ionic solutions\, bio-sensing capabiliti
 es\, and its prospects for high-throughput\nphysical DNA sequencing.\nWe i
 nvestigated ionic conductivity perpendicular to the graphene membrane sepa
 rating two\nreservoirs filled with ionic solutions. Despite this membrane 
 being only one atomic layer thick\, we\nfind it is a remarkable ionic insu
 lator\, stable over prolonged periods of time and for wide range of\nphysi
 cal and chemical parameters. When a nanometer sized pore is fabricated in 
 the graphene\nmembrane\, its conductance increases several orders of magni
 tude. Using nanopore to locally probe\nthe graphene–liquid interaction\,
  we showed that the membrane’s effective insulating thickness is\nless t
 han one nanometer. This makes the graphene nanopores an ideal platform for
  a single molecule\ndetector\, with potentials for sub-nanometer resolutio
 n along the length of the bio-molecule. We\ndemonstrated the feasibility o
 f such device by detecting conformation of many individual DNA\nmolecules.
LOCATION:PH L1 503 (Aquarium)
STATUS:CONFIRMED
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