A total scattering Debye function analysis study of faulted Pt nanocrystals embedded in a porous matrix

被引：27

作者：

Bertolotti, Federica ^{[1
,2
]}

Moscheni, Daniele ^{[1
,2
]}

Migliori, Andrea ^{[3
]}

Zacchini, Stefano ^{[4
]}

Cervellino, Antonio ^{[5
]}

Guagliardi, Antonietta ^{[6
,7
]}

Masciocchi, Norberto ^{[1
,2
]}

机构：

[1] Univ Insubria, Dipartimento Sci & Alta Tecnol, Via Valleggio 11, I-22100 Como, Italy

[2] Univ Insubria, To Sca Lab, Via Valleggio 11, I-22100 Como, Italy

[3] CNR, Ist Microelettron & Microsistemi, Via Piero Gobetti 101, I-40129 Bologna, Italy

[4] Univ Bologna, Dipartimento Chim Ind Toso Montanari, Viale Risorgimento 4, I-40136 Bologna, Italy

[5] Paul Scherrer Inst, Lab Synchrotron Radiat C, SLS, CH-5232 Villigen, Switzerland

[6] CNR, Ist Cristallog, Via Valleggio 11, I-22100 Como, Italy

[7] CNR, To Sca Lab, Via Valleggio 11, I-22100 Como, Italy

来源：

ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES | 2016年 / 72卷

关键词：

Debye scattering equation; stacking faults; platinum nanocrystals; X-RAY-DIFFRACTION; LATTICE-PARAMETERS; SURFACE-STRESS; STACKING-FAULTS; NANOPARTICLES; SIZE; GOLD; TEMPERATURE; PATTERN; METALS;

D O I：

10.1107/S205327331601487X

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Faulted face-centred cubic platinum nanocrystals, grown within a nanoporous silica matrix, have been extensively characterized by the Debye function analysis method applied to wide-angle synchrotron X-ray total scattering data. A method for building databases of sampled interatomic distances of weakly faulted materials is proposed, maintaining statistical significance and allowing complete populations of differently sized and shaped nanocrystals to be used within the DEBUSSY approach. This study suggests that anisotropic Pt nanoclusters are formed in the presence of a shape-directing (templating) agent, and tentatively describes the effects of post-synthetic temperature treatments on fault probability, size, shape and dispersion of the nanocrystal populations. Surface relaxation effects are also observed in the smallest particles.

引用

页码：632 / 644

页数：13

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