Electron tomography and 3D molecular simulations of platinum nanocrystals

被引：8

作者：

Florea, Ileana ^{[1
]}

Demortiere, Arnaud ^{[2
,3
]}

Petit, Christophe ^{[2
]}

Bulou, Herve ^{[1
]}

Hirlimann, Charles ^{[1
]}

Ersen, Ovidiu ^{[1
]}

机构：

[1] CNRS UdS, UMR 7504, Inst Phys & Chim Mat Strasbourg, F-67034 Strasbourg 2, France

[2] CNRS UPMC, LM2N, UMR 7070, F-75252 Paris 05, France

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

NANOSCALE | 2012年 / 4卷 / 16期

关键词：

SHAPE-CONTROLLED SYNTHESIS; OXIDE NANOCRYSTALS; PRACTICAL APPROACH; Z-CONTRAST; NANOPARTICLES; SIZE; STEM; GROWTH; GOLD; RECONSTRUCTION;

D O I：

10.1039/c2nr30990d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This work reports on the morphology of individual platinum nanocrystals with sizes of about 5 nm. By using the electron tomography technique that gives 3D spatial selectivity, access to quantitative information in the real space was obtained. The morphology of individual nanoparticles was characterized using HAADF-STEM tomography and it was shown to be close to a truncated octahedron. Using molecular dynamics simulations, this geometrical shape was found to be the one minimizing the nanocrystal energy. Starting from the tomographic reconstruction, 3D crystallographic representations of the studied Pt nanocrystals were obtained at the nanometer scale, allowing the quantification of the relative amount of the crystallographic facets present on the particle surface.

引用

页码：5125 / 5131

页数：7

共 66 条

[1] Nanoparticle shape and configuration analysis by transmission electron tomography [J].

Ahrenkiel, S. P. ;

Yu, P. R. ;

Murphy, J. E. ;

Nedeljkovic, J. M. ;

Donohoe, B. S. .

JOURNAL OF MICROSCOPY, 2008, 230 (03) :382-387

[2] Comparing electron tomography and HRTEM slicing methods as tools to measure the thickness of nanoparticles [J].

Alloyeau, D. ;

Ricolleau, C. ;

Oikawa, T. ;

Langlois, C. ;

Le Bouar, Y. ;

Loiseau, A. .

ULTRAMICROSCOPY, 2009, 109 (07) :788-796

[3] Three-Dimensional Atomic Imaging of Colloidal Core-Shell Nanocrystals [J].

Bals, Sara ;

Casavola, Marianna ;

van Huis, Marijn A. ;

Van Aert, Sandra ;

Batenburg, K. Joost ;

Van Tendeloo, Gustaaf ;

Vanmaekelbergh, Daniel .

NANO LETTERS, 2011, 11 (08) :3420-3424

[4] 3D imaging of nanomaterials by discrete tomography [J].

Batenburg, K. J. ;

Bals, S. ;

Sijbers, J. ;

Kuebel, C. ;

Midgley, P. A. ;

Hernandez, J. C. ;

Kaiser, U. ;

Encina, E. R. ;

Coronado, E. A. ;

Van Tendeloo, G. .

ULTRAMICROSCOPY, 2009, 109 (06) :730-740

[5] STEM HAADF electron tomography of palladium nanoparticles with complex shapes [J].

Benlekbir, S. ;

Epicier, T. ;

Bausach, M. ;

Aouine, M. ;

Berhault, G. .

PHILOSOPHICAL MAGAZINE LETTERS, 2009, 89 (02) :145-153

[6] Mechanisms of exchange diffusion on fcc(111) transition metal surfaces [J].

Bulou, H ;

Massobrio, C .

PHYSICAL REVIEW B, 2005, 72 (20)

[7] Local strain analysis of the herringbone reconstruction of Au(111) through atomistic simulations [J].

Bulou, H ;

Goyhenex, C .

PHYSICAL REVIEW B, 2002, 65 (04) :1-10

[8] New atomic mechanism of preferential nucleation on the herringbone reconstruction of Au(111) [J].

Bulou, Herve ;

Massobrio, Carlo .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (24) :8743-8746

[9] Magnetite morphology and life on Mars [J].

Buseck, PR ;

Dunin-Borkowski, RE ;

Devouard, B ;

Frankel, RB ;

McCartney, MR ;

Midgley, PA ;

Pósfai, M ;

Weyland, M .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2001, 98 (24) :13490-13495

[10] THE EQUILIBRIUM OF CRYSTAL SURFACES [J].

CABRERA, N .

SURFACE SCIENCE, 1964, 2 :320-345

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