Charge Transport across DNA-Based Three-Way Junctions.
Journal Article (Journal Article)
DNA-based molecular electronics will require charges to be transported from one site within a 2D or 3D architecture to another. While this has been shown previously in linear, π-stacked DNA sequences, the dynamics and efficiency of charge transport across DNA three-way junction (3WJ) have yet to be determined. Here, we present an investigation of hole transport and trapping across a DNA-based three-way junction systems by a combination of femtosecond transient absorption spectroscopy and molecular dynamics simulations. Hole transport across the junction is proposed to be gated by conformational fluctuations in the ground state which bring the transiently populated hole carrier nucleobases into better aligned geometries on the nanosecond time scale, thus modulating the π-π electronic coupling along the base pair sequence.
Full Text
Duke Authors
Cited Authors
- Young, RM; Singh, APN; Thazhathveetil, AK; Cho, VY; Zhang, Y; Renaud, N; Grozema, FC; Beratan, DN; Ratner, MA; Schatz, GC; Berlin, YA; Lewis, FD; Wasielewski, MR
Published Date
- April 2015
Published In
Volume / Issue
- 137 / 15
Start / End Page
- 5113 - 5122
PubMed ID
- 25822073
Electronic International Standard Serial Number (EISSN)
- 1520-5126
International Standard Serial Number (ISSN)
- 0002-7863
Digital Object Identifier (DOI)
- 10.1021/jacs.5b00931
Language
- eng