Self-assembled monolayer films of C[sub 60]/on cysteamine-modified gold
- Northwestern Univ., Evanston, IL (United States) Dow Chemical Company, Midland, MI (United States)
Self-assembled monolayer films (SAMs) of C[sub 60] on cysteamine-modified and cysteamine/ethanethiol-modified Au are reported. The monolayers were characterized via contact angle measurements, X-ray photoelectron spectroscopy, electrochemistry, and quartz crystal microbalance (QCM) measurements. C[sub 60] surface coverage (2.0 [times] 10[sup [minus]10] mol/cm[sup 2]) for a film formed on pure cysteamine was determined by QCM measurements and compares remarkably well with monolayer coverage (1.9 [times] 10[sup [minus]10] mol/cm[sup 2]) predicted by a model based on crystallographic data for C[sub 60]. These experiments demonstrate the utility of the QCM in characterizing and monitoring the growth of fullerene SAMs. C[sub 60] SAMs formed on pure cysteamine yield strikingly different electrochemical responses than those formed on prelayers consisting of varying ratios of ethanethiol and cysteamine and previously reported monolayers of C[sub 60] on (aminopropyl)silanized oxide surfaces. Although the C[sub 60] SAMs are stable under ambient conditions, the fullerenes may be desorbed from the surface through electrochemical reduction of the films for extended periods of time (> 10 min). 11 refs., 2 figs.
- OSTI ID:
- 5999235
- Journal Information:
- Langmuir; (United States), Vol. 9:8; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
FULLERENES
ADSORPTION
DESORPTION
GOLD
SURFACE PROPERTIES
MEA
THIN FILMS
AMINES
CARBON
DRUGS
ELEMENTS
FILMS
METALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
RADIOPROTECTIVE SUBSTANCES
SORPTION
THIOLS
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
360104 - Metals & Alloys- Physical Properties