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Ultrastable Crystalline Semiconducting Hydrogenated Borophene
Author(s) -
Hou Chuang,
Tai Guoan,
Hao Jinqian,
Sheng Lihang,
Liu Bo,
Wu Zitong
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202001045
Subject(s) - borophene , materials science , fabrication , thermal stability , boron , crystallinity , sodium borohydride , chemical engineering , nanotechnology , metal , thermal decomposition , composite material , organic chemistry , chemistry , metallurgy , monolayer , medicine , alternative medicine , pathology , engineering , catalysis
Borophene sheets have been synthesized in recent experiments, but the metallic nature and structural instability of the sheets seriously prevent emerging applications. Hydrogenated borophene has been predicted as an ideal material for nanoelectronic applications due to its high stability as well as excellent electronic and mechanical properties. However, the fabrication of hydrogenated borophene is still a great challenge. Here, we demonstrate that hydrogenated borophenes in large quantities can be prepared without any metal substrates by a stepwise in‐situ thermal decomposition of sodium borohydride under hydrogen as the carrier gas. The borophenes with good crystallinity exhibit superior stability in strong acid or base solvents. The structure of the grown borophene is in good agreement with the predicted semiconducting α‐boron sheet. A fabricated borophene‐based memory device shows a high ON/OFF‐current ratio of 3×10 3 and a low operating voltage of less than 0.35 V as well as good stability.