Competing Interactions in DNA Assembly on Graphene
TLDR
It is argued that the observed assembly behavior is caused by a crossover in the competition between base-base pi stacking and base-graphenePi stacking and it is inferred that a critical crossover energy of eV is required to cause this crossover.Abstract:
We study the patterns that short strands of single-stranded DNA form on the top graphene surface of graphite. We find that the DNA assembles into two distinct patterns, small spherical particles and elongated networks. Known interaction models based on DNA-graphene binding, hydrophobic interactions, or models based on the purine/pyrimidine nature of the bases do not explain our observed crossover in pattern formation. We argue that the observed assembly behavior is caused by a crossover in the competition between base-base pi stacking and base-graphene pi stacking and we infer a critical crossover energy of eV. The experiments therefore provide a projective measurement of the base-base interaction strength.read more
Citations
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Graphene–Gold Metasurface Architectures for Ultrasensitive Plasmonic Biosensing
Shuwen Zeng,Shuwen Zeng,Kandammathe Valiyaveedu Sreekanth,Jingzhi Shang,Ting Yu,Chih-Kuang Chen,Feng Yin,Dominique Baillargeat,Dominique Baillargeat,Philippe Coquet,Philippe Coquet,Ho-Pui Ho,Andrei V. Kabashin,Ken-Tye Yong,Ken-Tye Yong +14 more
TL;DR: Benefiting from extreme phase singularities of reflected light induced by strong plasmon-mediated energy confinements, the metasurface demonstrates a much-improved sensitivity to molecular bindings nearby and achieves an ultralow detection limit.
References
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TL;DR: The goal of this series is to pinpoint areas of chemistry where recent progress has outpaced what is covered in any available textbooks, and then seek out and persuade experts in these fields to produce relatively concise but instructive introductions to their fields.
Journal ArticleDOI
DNA-assisted dispersion and separation of carbon nanotubes.
Ming Zheng,Anand Jagota,E. D. Semke,Bruce A. Diner,Robert S. Mclean,Steve R. Lustig,Raymond E Richardson,Nancy G. Tassi +7 more
TL;DR: It is demonstrated that DNA-coated carbon nanotubes can be separated into fractions with different electronic structures by ion-exchange chromatography, and opens the door to carbon-nanotube-based applications in biotechnology.
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Structure-based carbon nanotube sorting by sequence-dependent DNA assembly.
Ming Zheng,Ming Zheng,Ming Zheng,Anand Jagota,Anand Jagota,Anand Jagota,Michael S. Strano,Michael S. Strano,Michael S. Strano,A. P. B. Santos,A. P. B. Santos,A. P. B. Santos,Paul W. Barone,Paul W. Barone,Paul W. Barone,S. Grace Chou,S. Grace Chou,S. Grace Chou,Bruce A. Diner,Bruce A. Diner,Bruce A. Diner,Mildred S. Dresselhaus,Mildred S. Dresselhaus,Mildred S. Dresselhaus,Robert S. Mclean,Robert S. Mclean,Robert S. Mclean,G. Bibiana Onoa,G. Bibiana Onoa,G. Bibiana Onoa,Georgii G. Samsonidze,Georgii G. Samsonidze,Georgii G. Samsonidze,E. D. Semke,E. D. Semke,E. D. Semke,Monica L. Usrey,Monica L. Usrey,Monica L. Usrey,Dennis J. Walls,Dennis J. Walls,Dennis J. Walls +41 more
TL;DR: A systematic search of the ssDNA library selected a sequence d(GT)n, n = 10 to 45 that self-assembles into a helical structure around individual nanotubes in such a way that the electrostatics of the DNA-CNT hybrid depends on tube diameter and electronic properties, enabling nanotube separation by anion exchange chromatography.
Journal ArticleDOI
Graphene-Based Single-Bacterium Resolution Biodevice and DNA Transistor: Interfacing Graphene Derivatives with Nanoscale and Microscale Biocomponents
Nihar Mohanty,Vikas Berry +1 more
TL;DR: The fabrication and functioning of a novel CMG-based single-bacterium biodevice, label-free DNA sensor, and bacterial DNA/protein and polyelectrolyte chemical transistor are reported on.
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TL;DR: This unique and practical resource provides the most complete and concise summary of underlying principles and approaches to studying nucleic acid structure, including discussion of x-ray crystallography, NMR, molecular modelling, and databases.