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Title: Deformation mechanisms of ultra-thin Al layers in Al/SiC nanolaminates as a function of thickness and temperature
Award ID(s):
1647568
NSF-PAR ID:
10025967
Author(s) / Creator(s):
; ; ; ;
Date Published:
Journal Name:
Philosophical Magazine
Volume:
96
Issue:
32-34
ISSN:
1478-6435
Page Range / eLocation ID:
3336 to 3355
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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  1. Abstract

    The discovery of homodinuclear multiple bonds composed of Group 13 elements represents one of the most challenging frontiers in modern chemistry. A classical triple bond such as N≡N and HC≡CH contains one σ bond and two π bonds constructed from the p orbitals perpendicular to the σ bond. However, the traditional textbook triple bond between two Al atoms has remained elusive. Here we report an Al≡Al triple bond in the designer Na3Al2cluster predicted in silico, which was subsequently generated by pulsed arc discharge followed by mass spectrometry and photoelectron spectroscopy characterizations. Being effectively Al2−due to the electron donation from Na, the Al atoms in Na3Al2undergo a double electronic transmutation into Group 15 elements, thus the Al2−≡Al2−kernel mimics the P≡P and N≡N molecules. We anticipate this work will stimulate more endeavors in discovering materials using Al2−≡Al2−as a building block in the gas phase and in the solid state.

     
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  2. Abstract

    The discovery of homodinuclear multiple bonds composed of Group 13 elements represents one of the most challenging frontiers in modern chemistry. A classical triple bond such as N≡N and HC≡CH contains one σ bond and two π bonds constructed from the p orbitals perpendicular to the σ bond. However, the traditional textbook triple bond between two Al atoms has remained elusive. Here we report an Al≡Al triple bond in the designer Na3Al2cluster predicted in silico, which was subsequently generated by pulsed arc discharge followed by mass spectrometry and photoelectron spectroscopy characterizations. Being effectively Al2−due to the electron donation from Na, the Al atoms in Na3Al2undergo a double electronic transmutation into Group 15 elements, thus the Al2−≡Al2−kernel mimics the P≡P and N≡N molecules. We anticipate this work will stimulate more endeavors in discovering materials using Al2−≡Al2−as a building block in the gas phase and in the solid state.

     
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