Scanning tunneling microscopy of template-stripped Au surfaces and highly ordered self-assembled monolayers.
Template stripping of Au films in ultrahigh vacuum (UHV) produces atomically flat and pristine surfaces that serve as substrates for highly ordered self-assembled monolayer (SAM) formation. Atomic resolution scanning tunneling microscopy of template-stripped (TS) Au stripped in UHV confirms that the stripping process produces a flat, predominantly 111 textured, atomically clean surface. Octanethiol SAMs vapor deposited in situ onto UHV TS Au show a c(4 x 2) superlattice with (square root 3 x square root 3) R30 degrees basic molecular structure having an ordered domain size up to 100 nm wide. These UHV results validate the TS Au surface as a simple, clean and high-quality surface preparation method for SAMs deposited from both vapor phase and solution phase.
Lee
Sangyeob
S
Department of Chemical Engineering and Materials Science, University of California, Irvine, California 92697, USA.
Bae
Sung-Soo
SS
Medeiros-Ribeiro
Gilberto
G
Blackstock
Jason J
JJ
Kim
Sehun
S
Stewart
Duncan R
DR
Ragan
Regina
R
D002627:Chemistry, Physical / Q000379:methods; D004563:Electrochemistry / Q000379:methods; D004867:Equipment Design; D006046:Gold / Q000737:chemistry*; D016252:Microscopy, Scanning Tunneling / Q000295:instrumentation / Q000379:methods*; D015394:Molecular Structure; D010316:Particle Size; D012825:Silicon / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
D006046:Gold; D012825:Silicon