Transport mechanisms of alkanethiols during microcontact printing on gold
Article Abstract:
The need to carry the monolayer-forming reaction to completion limits microcontact printing with elastomeric stamps, a versatile approach in modifying the chemistry of surfaces. The accuracy of prints at sub-500-nm scales was found to be significantly degraded due to molecular diffusion. The best practical compromise between self-assembly of the resist and its transport along the stamp and substrate interfaces and through the gas phase proved to be printing monolayers of eicosanethiol on gold. It is shown that the various paths in controlling the chemical contrast on the substrate. modifying the chemistry of surfaces.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Energetics and kinetics of the physisorption of hydrocarbons on Au(111)
Article Abstract:
A study was conducted to analyze the adsorption of a series of n-alkanes on a Au(111) surface using helium atom reflectivity. The physisorption sticking coefficient was determined for straight chain alkanes and alkenes across different temperatures. Surface populations were then measured using the helium atom scattering method. Experimental results indicated that decreases in the physisorption sticking probability correlated with the incomplete accommodation of the hydrocarbon series by the surface.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Kinetics and mechanism of sonolytic degradation of chlorinated hydrocarbons: frequency effects
Article Abstract:
The kinetics of the sonolytic degradation of aqueous solutions of hexachlorethane (C2Cl6) and carbon tetrachloride were investigated at six different frequencies over the range from 20 to 1078 kHz. The rates of degradation of CCl4 and C2Cl6 increased with increasing frequency with optimal degradation rates at 500 kHz. The relative rates of sonolytic degradation of the three chlorinated methanes followed the order of CCl4 > CHCl3 > CH2Cl2 at 205 kHz.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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