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Lee, Geunsik
Electronic Structure and Transport in Condensed Materials
Research Interests
  • open quantum system, non-equilibrium electron transport
  • electron correlation, dynamical mean field theory
  • 2D materials, metal complexes

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Facile room-temperature self-assembly of extended cation-free guanine-quartet network on Mo-doped Au(111) surface

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Title
Facile room-temperature self-assembly of extended cation-free guanine-quartet network on Mo-doped Au(111) surface
Author
Ghassami, AmirrezaOleiki, ElhamKim, Dong YeonShin, Hyung-JoonLee, GeunsikKim, Kwang S.
Issue Date
2021-05
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE ADVANCES
Abstract
Guanine-quadruplex, consisting of several stacked guanine-quartets (GQs), has emerged as an important category of novel molecular targets with applications from nanoelectronic devices to anticancer drugs. Incorporation of metal cations into a GQ structure is utilized to form stable G-quadruplexes, while formation of a cation-free GQ network has been challenging. Here we report the room temperature (RT) molecular self-assembly of extended pristine GQ networks on an Au(111) surface. An implanted molybdenum atom within the Au(111) surface is used to nucleate and stabilize the cation-free GQ network. Additionally, decoration of the Au(111) surface with 7-armchair graphene nanoribbons (7-AGNRs) enhances the GQ domain size by suppressing the influence of the disordered phase nucleated from Au step edges. Scanning tunneling microscopy/spectroscopy (STM/STS) and density functional theory (DFT) calculations confirm the formation of GQ networks and unravel the nucleation and growth mechanism. Our work, utilizing a hetero-atom doped substrate, provides a facile approach to enhance the stability and domain size of the GQ self-assembly, which would be applicable for other molecular structures.
URI
https://scholarworks.unist.ac.kr/handle/201301/53000
URL
https://pubs.rsc.org/en/content/articlelanding/2021/NA/D1NA00235J#!divAbstract
DOI
10.1039/d1na00235j
ISSN
2516-0230
Appears in Collections:
CHM_Journal Papers
MSE_Journal Papers
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