Positive and Negative Contrast Lithography on Silver Quantum Dot Monolayers

Scanning nonlinear optical microscopy, at a resolution of ∼2 μm, was utilized to examine monolayers of alkylthiol-passivated silver nanocrystals. Selected regions of the monolayers were irradiated with a pulse train of picosecond 1064 nm laser pulses, and then the second harmonic generation (SHG) re...

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Bibliographic Details
Published in:The journal of physical chemistry. B 1999-05, Vol.103 (18), p.3524-3528
Main Authors: Henrichs, Sven E, Sample, Jennifer L, Shiang, Joe J, Heath, James R, Collier, Charles P, Saykally, Richard J
Format: Article
Language:English
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Summary:Scanning nonlinear optical microscopy, at a resolution of ∼2 μm, was utilized to examine monolayers of alkylthiol-passivated silver nanocrystals. Selected regions of the monolayers were irradiated with a pulse train of picosecond 1064 nm laser pulses, and then the second harmonic generation (SHG) response of those monolayers was recorded in a second scan. Two lithographic processesone leading to a negative contrast SHG image (observed for particles
ISSN:1520-6106
1520-5207
DOI:10.1021/jp990080x