Bond length contraction in Au nanocrystals formed by ion implantation into thin SiO2

被引：40

作者：

Kluth, P ^{[1
]}

Johannessen, B

Giraud, V

Cheung, A

Glover, CJ

Azevedo, GD

Foran, GJ

Ridgway, MC

机构：

[1] Australian Natl Univ, Dept Elect Mat Engn, Canberra, ACT 0200, Australia

[2] Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 16期

关键词：

D O I：

10.1063/1.1803619

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Au nanocrystals (NCs) fabricated by ion implantation into thin SiO2 and annealing were investigated by means of extended x-ray absorption fine structure (EXAFS) spectroscopy and transmission electron microscopy. A bond length contraction was observed and can be explained by surface tension effects in a simple liquid-drop model. Such results are consistent with previous reports on nonembedded NCs implying a negligible influence of the SiO2 matrix. Cumulant analysis of the EXAFS data suggests surface reconstruction or relaxation involving a further shortened bond length. A deviation from the octahedral closed shell structure is apparent for NCs of size 25 Angstrom. (C) 2004 American Institute of Physics.

引用

收藏

页码：3561 / 3563

页数：3

相关论文

共 23 条

[1] Real-space multiple-scattering calculation and interpretation of x-ray-absorption near-edge structure [J].

Ankudinov, AL ;

Ravel, B ;

Rehr, JJ ;

Conradson, SD .

PHYSICAL REVIEW B, 1998, 58 (12) :7565-7576

[2]

[Anonymous], 1988, XRAY ABSORPTION

[3] Stress relief in reconstruction [J].

Bach, CE ;

Giesen, M ;

Ibach, H ;

Einstein, TL .

PHYSICAL REVIEW LETTERS, 1997, 78 (22) :4225-4228

[4] EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE AND NEAR-EDGE-STRUCTURE STUDIES ON EVAPORATED SMALL CLUSTERS OF AU [J].

BALERNA, A ;

BERNIERI, E ;

PICOZZI, P ;

REALE, A ;

SANTUCCI, S ;

BURATTINI, E ;

MOBILIO, S .

PHYSICAL REVIEW B, 1985, 31 (08) :5058-5065

[5] A STRUCTURAL INVESTIGATION ON SMALL GOLD CLUSTERS BY EXAFS [J].

BALERNA, A ;

BERNIERI, E ;

PICOZZI, P ;

REALE, A ;

SANTUCCI, S ;

BURATTINI, E ;

MOBILIO, S .

SURFACE SCIENCE, 1985, 156 (JUN) :206-213

[6] Structure and bonding of gold metal clusters, colloids, and nanowires studied by EXAFS, XANES, and WAXS [J].

Benfield, RE ;

Grandjean, D ;

Kröll, M ;

Pugin, R ;

Sawitowski, T ;

Schmid, G .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (10) :1961-1970

[7] Two stages in the kinetics of gold cluster growth in ion-implanted silica during isothermal annealing in oxidizing atmosphere [J].

De Marchi, G ;

Mattei, G ;

Mazzoldi, P ;

Sada, C ;

Miotello, A .

JOURNAL OF APPLIED PHYSICS, 2002, 92 (08) :4249-4254

[8] Characterization of nanoscale silver particles in glasses by temperature-dependent EXAFS spectroscopy [J].

Dubiel, M ;

Brunsch, S ;

Tröger, L .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (22) :4775-4789

[9] A view from the inside: Complexity in the atomic scale ordering of supported metal nanoparticles [J].

Frenkel, AI ;

Hills, CW ;

Nuzzo, RG .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (51) :12689-12703

[10] STRUCTURE OF AU ULTRAFINE PARTICLES IN SILICA GLASS - X-RAY-DIFFRACTION STUDY [J].

FUKUMI, K ;

CHAYAHARA, A ;

MAKIHARA, M ;

FUJII, K ;

HAYAKAWA, J ;

SATOU, M .

APPLIED PHYSICS LETTERS, 1994, 64 (25) :3410-3412