Self-assembly of alkanoic acids on gold surfaces modified by underpotential deposition

Lin, SY Chen, CH Chan, YC Lin, CM Chen, HW

Sy. Lin et al., Self-assembly of alkanoic acids on gold surfaces modified by underpotential deposition, J PHYS CH B, 105(21), 2001, pp. 4951-4955

38

INGLESE

Article

Physical Chemistry/Chemical Physics

JOURNAL OF PHYSICAL CHEMISTRY B

1520-6106 → ACNP

105

21

2001

4951 - 4955

ISI

1520-6106(20010531)105:21<4951:SOAAOG>2.0.ZU;2-W

We present an alternative to self-assembled monolayers (SAMs) of omega -fun ctionalized alkanethiols on gold. Substrates utilized here are gold modifie d by electrochemical deposition of silver or copper monolayers. The metal a dlayers promote anchoring of carboxylate headgroups and assembly of omega - alkanoic acids, which would otherwise exhibit no chemisorption on bare gold . Infrared reflectance absorption spectroscopy shows that the films exhibit general characteristics of SAMs. The binding scheme is different from SAMs of alkanethiols on gold and alkanoic acids on silver or copper surfaces. W etability results obtained from contact angle measurements indicate that su ch films are more reproducible than SAMs of alkanoic acids on bulk silver a nd copper.