Journal
LANGMUIR
Volume 28, Issue 35, Pages 12691-12695Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la301671a
Keywords
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Funding
- National Science Council of ROC [NSC96-2628-M-001-010-MY3, NSC99-2112-M-001-029-MY3]
- Academia Sinica
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It was numerically predicted that dissolved gas particles could enrich and adsorb at hydrophobic-liquid interfaces. Here we observe nucleation and growth of bright patches of similar to 0.45 nm high on the graphite surface in pure water with frequency-modulation atomic force microscopy when the dissolved gas concentration is below the saturation level. The bright patches, suspected to be caused by adsorption of nitrogen molecules at the graphite-water interface, are composed of domains of a rowlike structure with the row separation of 4.2 +/- 0.3 nm. The observation of this ordered adlayer might underline the gas segregation at various water interfaces.
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