Journal
CHEMICAL PHYSICS LETTERS
Volume 619, Issue -, Pages 152-157Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2014.11.068
Keywords
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Funding
- CREST project, Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [24686026] Funding Source: KAKEN
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The elucidation of the electrical double layer (EDL) structure including biomolecules is helpful in controlling biointerfacial functions in biosensing devices. In this study, the effect of double-stranded DNA (ds-DNA) on the EDL structure at the SiO2/NaClaq interface in a concentrated solution was investigated by classical molecular dynamics (MD) simulation. In 1.0 M NaClaq, negatively charged ds-DNA shielded electrically by cations did not affect the potential profile of the EDL structure. This finding indicates that the simulated bio-interfacial structure allows the detection of ionic charges adsorbed directly onto substrates in a concentrated solution regardless of the presence of shielded biomolecular charges. (C) 2014 Elsevier B.V. All rights reserved.
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