Journal
LANGMUIR
Volume 26, Issue 21, Pages 16287-16290Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la101413e
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Funding
- National Science Foundation [CHE-0910549]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0910549] Funding Source: National Science Foundation
- Office Of The Director
- EPSCoR [0814442] Funding Source: National Science Foundation
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Self-assembled monolayers of tri-L-leucine and tri-L-valine formed on highly ordered pyrolytic graphite (HOPG) substrates have been examined using scanning tunneling microscopy. These monolayers exhibit markedly different structures, even though the tripeptides differ by only a minor change in the amino acid R-group. This minor change in R-group apparently affects the balance between hydrogen bonding and van der Waals interactions that control the monolayer structures. Implications of this effect for evolution of molecular complexity in prebiotic synthesis on environmental surfaces are discussed.
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