Controlling the electronic properties of silicon nanowires with functional molecular groups.
Attachment of a simple polar molecule, terpyridine, to the surfaces of Si nanowires with diameters ranging from 7-100 nm was investigated with two terminal conductivity measurements, a unique single nanowire photoelectron spectroscopy, and theoretical analysis. Our experiments reveal the details of molecule-nanowire bonding and charge transfer, diameter dependent Fermi level shifts, and acid attachment leading to conductivity in the cylindrical molecular nanolayer surrounding the nanowire.
Haight
Richard
R
IBM TJ Watson Research Center, Yorktown Heights, New York 10598, USA.
Sekaric
Lidija
L
Afzali
Ali
A
Newns
Dennis
D
D004553:Electric Conductivity; D004583:Electrons; D008422:Materials Testing; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods; D053770:Nanowires / Q000737:chemistry*; D010316:Particle Size; D011725:Pyridines / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties
D011725:Pyridines; D012825:Silicon