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Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

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Templating an organic array with Si(111)-7×7.

Alfred J Weymouth¹, Roberto H Miwa, Graham J A Edge

¹Department of Physics, Engineering Physics & Astronomy, Queen's University, Kingston, Ontario, Canada K7L 3N6.

Chemical Communications (Cambridge, England)

|June 14, 2011

Summary

This summary is machine-generated.

Steric hindrance prevents molecules from adsorbing near each other on silicon surfaces. This allows for the creation of ordered organic layers directly on the silicon surface reconstruction.

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Area of Science:

Surface Science
Materials Chemistry
Nanotechnology

Background:

The silicon (111)-7×7 surface reconstruction presents unique adsorption sites.
Understanding molecular adsorption is crucial for surface functionalization and nanomaterial design.

Purpose of the Study:

To investigate the steric effects on molecular adsorption on the Si(111)-7×7 surface.
To explore the possibility of templating ordered organic layers on this surface.

Main Methods:

Simulations and experimental techniques were used to study molecular adsorption.
Analysis focused on the energetic equivalence of different adsorption geometries.

Main Results:

Nearest neighbor molecular adsorption is sterically hindered on the Si(111)-7×7 surface.
This steric effect breaks the energetic equivalence of corner and edge di-σ attachment sites.

Conclusions:

Steric hindrance can be utilized to control molecular assembly on surfaces.
Translationally ordered organic layers can be templated directly on the 7×7 surface reconstruction, opening new avenues for surface engineering.