Bond contraction and lone pair interaction at nitride surfaces

C. Q. Sun; B. K. Tay; Shu Ping Lau; X. W. Sun; X. T. Zeng; S. Li; H. L. Bai; H. Liu; Z. H. Liu; E. Y. Jiang

doi:10.1063/1.1390305

Bond contraction and lone pair interaction at nitride surfaces

C. Q. Sun, B. K. Tay, Shu Ping Lau, X. W. Sun, X. T. Zeng, S. Li, H. L. Bai, H. Liu, Z. H. Liu, E. Y. Jiang

Research output: Journal article publication › Journal article › Academic research › peer-review

85 Citations (Scopus)

Abstract

It is shown that bond contraction and nonbonding lone-pair interaction dominate at nitride surfaces. The maximum elastic recovery of a nitride surface was found to be 100% under a relatively lower nanoindentation load (< 1.0 mN) and the hardness of the surface was found to be 100% higher than the bulk value. It is interpreted that the spontaneous bond contraction, estimated at 12%-14%, strengthens the binding energy and hence the hardness and Young's modulus at the surface. The lone-pair weak interaction claims the responsibility for (i) the high elastic recovery, (ii) the lower Raman frequencies of vibration, and (iii) the existence of critical loads for slide friction or lone-pair broken.

Original language	English
Pages (from-to)	2615-2617
Number of pages	3
Journal	Journal of Applied Physics
Volume	90
Issue number	5
DOIs	https://doi.org/10.1063/1.1390305
Publication status	Published - 1 Sept 2001
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Bond contraction and lone pair interaction at nitride surfaces",

abstract = "It is shown that bond contraction and nonbonding lone-pair interaction dominate at nitride surfaces. The maximum elastic recovery of a nitride surface was found to be 100% under a relatively lower nanoindentation load (< 1.0 mN) and the hardness of the surface was found to be 100% higher than the bulk value. It is interpreted that the spontaneous bond contraction, estimated at 12%-14%, strengthens the binding energy and hence the hardness and Young's modulus at the surface. The lone-pair weak interaction claims the responsibility for (i) the high elastic recovery, (ii) the lower Raman frequencies of vibration, and (iii) the existence of critical loads for slide friction or lone-pair broken.",

author = "Sun, {C. Q.} and Tay, {B. K.} and Lau, {Shu Ping} and Sun, {X. W.} and Zeng, {X. T.} and S. Li and Bai, {H. L.} and H. Liu and Liu, {Z. H.} and Jiang, {E. Y.}",

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AU - Sun, C. Q.

AU - Tay, B. K.

AU - Lau, Shu Ping

AU - Sun, X. W.

AU - Zeng, X. T.

AU - Li, S.

AU - Bai, H. L.

AU - Liu, H.

AU - Liu, Z. H.

AU - Jiang, E. Y.

PY - 2001/9/1

Y1 - 2001/9/1

N2 - It is shown that bond contraction and nonbonding lone-pair interaction dominate at nitride surfaces. The maximum elastic recovery of a nitride surface was found to be 100% under a relatively lower nanoindentation load (< 1.0 mN) and the hardness of the surface was found to be 100% higher than the bulk value. It is interpreted that the spontaneous bond contraction, estimated at 12%-14%, strengthens the binding energy and hence the hardness and Young's modulus at the surface. The lone-pair weak interaction claims the responsibility for (i) the high elastic recovery, (ii) the lower Raman frequencies of vibration, and (iii) the existence of critical loads for slide friction or lone-pair broken.

AB - It is shown that bond contraction and nonbonding lone-pair interaction dominate at nitride surfaces. The maximum elastic recovery of a nitride surface was found to be 100% under a relatively lower nanoindentation load (< 1.0 mN) and the hardness of the surface was found to be 100% higher than the bulk value. It is interpreted that the spontaneous bond contraction, estimated at 12%-14%, strengthens the binding energy and hence the hardness and Young's modulus at the surface. The lone-pair weak interaction claims the responsibility for (i) the high elastic recovery, (ii) the lower Raman frequencies of vibration, and (iii) the existence of critical loads for slide friction or lone-pair broken.

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DO - 10.1063/1.1390305

M3 - Journal article

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 5

ER -

Bond contraction and lone pair interaction at nitride surfaces

Abstract

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