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Scanning Tunneling Microscopy and Spectroscopy of Novel Silver–Containing DNA Molecules
Author(s) -
FardianMelamed Natalie,
Eidelshtein Gennady,
Rotem Dvir,
Kotlyar Alexander,
Porath Danny
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201902816
Subject(s) - materials science , scanning tunneling microscope , nanotechnology , molecule , nanoelectronics , molecular electronics , carbon nanotube , conductivity , characterization (materials science) , scanning tunneling spectroscopy , bioelectronics , spectroscopy , biosensor , chemistry , physics , organic chemistry , quantum mechanics
The quest for a suitable molecule to pave the way to molecular nanoelectronics has been met with obstacles for over a decade. Candidate molecules such as carbon nanotubes lack the appealing trait of self‐assembly, while DNA seems to lack the desirable feature of conductivity. Silver‐containing poly(dG)–poly(dC) DNA (E‐DNA) molecules have recently been reported as promising candidates for molecular electronics, owing to the selectivity of their metallization, their thin and uniform structure, their resistance to deformation, and their maximum possible high conductivity. Ultrahigh vacuum (UHV) scanning tunneling microscopy (STM) of E‐DNA presents an elaborate high‐resolution morphology characterization of these unique molecules, along with a detailed depiction of their electronic level structure. The energy levels found for E‐DNA indicate a novel truly hybrid metal–molecule structure, potentially more conductive than other DNA‐based alternatives.