Sum Frequency Generation Microscopy of Microcontact-Printed Mixed Self-Assembled Monolayers

Sum frequency generation imaging microscopy (SFGIM) is used to image the chemically distinct regions of a microcontact-printed monolayer surface. The contrast in the images is based on the vibrational spectrum of each component in the monolayer. Mixtures of C16 thiols on gold with CH3 and phenyl ter...

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Bibliographic Details
Published in:The journal of physical chemistry. B 2006-02, Vol.110 (4), p.1807-1813
Main Authors: Cimatu, Katherine, Baldelli, Steven
Format: Article
Language:English
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Summary:Sum frequency generation imaging microscopy (SFGIM) is used to image the chemically distinct regions of a microcontact-printed monolayer surface. The contrast in the images is based on the vibrational spectrum of each component in the monolayer. Mixtures of C16 thiols on gold with CH3 and phenyl termination are imaged with a resolution of ∼10 μm. Microcontact printing produces films that are different compared to the immersion procedure of forming self-assembled monolayers. The SFGIM technique is able to obtain a vibrational spectrum at each point on the surface and demonstrate that the stamped area has significant mixing with the molecules deposited from the backfilling solution.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp0562779