Open AccessAtomically Precise PdSe2 Pentagonal Nanoribbons
Author(s) -
Giang D. Nguyen,
Akinola D. Oyedele,
Amanda V. Haglund,
Wonhee Ko,
Liangbo Liang,
Alexander A. Puretzky,
David Mandrus,
Kai Xiao,
AnPing Li
Publication year - 2020
Publication title -
acs nano
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.554
H-Index - 382
eISSN - 1936-086X
pISSN - 1936-0851
DOI - 10.1021/acsnano.9b08390
Subject(s) - materials science , stacking , scanning tunneling microscope , substrate (aquarium) , density functional theory , raman spectroscopy , coupling (piping) , dimer , band gap , condensed matter physics , nanotechnology , optoelectronics , crystallography , physics , computational chemistry , chemistry , optics , nuclear magnetic resonance , composite material , oceanography , geology
We report atomically precise pentagonal PdSe 2 nanoribbons (PNRs) fabricated on a pristine PdSe 2 substrate with a hybrid method of top-down and bottom-up processes. The PNRs form a uniform array of dimer structure with a width of 2.4 nm and length of more than 200 nm. In situ four-probe scanning tunneling microscopy (STM) reveals metallic behavior of PNRs with ballistic transport for at least 20 nm in length. Density functional theory calculations produce a semiconducting density of states of isolated PNRs and find that the band gap narrows and disappears quickly once considering coupling between PNR stacking layers or interaction with the PdSe 2 substrate. The coupling of PNRs is further corroborated by Raman spectroscopy and field-effect transistor measurements. The facile method of fabricating atomically precise PNRs offers an air-stable functional material for dimensional control.
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