Competing Interactions in DNA Assembly on Graphene
作者： Saliha Akca , Ashkan Foroughi , Daniel Frochtzwajg , Henk W. Ch. Postma
DOI: 10.1371/JOURNAL.PONE.0018442
关键词: Crossover 、 Chemistry 、 Pattern formation 、 Graphene 、 Chemical physics 、 Hydrogen bond 、 DNA 、 Stacking 、 Carbon nanotube 、 Hydrophobic effect
摘要: We study the patterns that short strands of single-stranded DNA form on top graphene surface graphite. find assembles into two distinct patterns, small spherical particles and elongated networks. Known interaction models based DNA-graphene binding, hydrophobic interactions, or purine/pyrimidine nature bases do not explain our observed crossover in pattern formation. argue assembly behavior is caused by a competition between base-base pi stacking base-graphene we infer critical energy eV. The experiments therefore provide projective measurement strength.
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