Low-Temperature Nanocrystal Unification through Rotations and Relaxations Probed by in Situ Transmission Electron Microscopy

被引：164

作者：

van Huis, Marijn A. ^{[1
]}

Kunneman, Lucas T. ^{[2
]}

Overgaag, Karin ^{[2
]}

Xu, Qiang ^{[1
]}

Pandraud, Gregory ^{[1
]}

Zandbergen, Henny W. ^{[1
]}

Vanmaekelbergh, Daniel ^{[2
]}

机构：

[1] Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands

[2] Univ Utrecht, Debije Inst, NL-3508 TH Utrecht, Netherlands

来源：

NANO LETTERS | 2008年 / 8卷 / 11期

关键词：

D O I：

10.1021/nl8024467

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Through the mechanism of "oriented attachment", small nanocrystals can fuse into a wide variety of one- and two-dimensional nanostructures. This fusion phenomenon is investigated in detail by low-temperature annealing of a two-dimensional array of 10 nm-sized PbSe nanocrystals, in situ in the transmission electron microscope. We have revealed a complex chain of processes; after coalescence, the connected nanocrystals undergo consecutive rotations in three-dimensional space, followed by drastic interfacial relaxations whereby full fusion is obtained.

引用

页码：3959 / 3963

页数：5

共 25 条

[1] Spontaneous crystallographic instabilities of Pb nanoparticles in a SiO matrix [J].

Be'er, Avraham ;

Kofman, Richard ;

Phillipp, Fritz ;

Lereah, Yossi .

PHYSICAL REVIEW B, 2007, 76 (07)

[2] Designing PbSe nanowires and nanorings through oriented attachment of nanoparticles [J].

Cho, KS ;

Talapin, DV ;

Gaschler, W ;

Murray, CB .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (19) :7140-7147

[3] Large triangular single crystals formed by mild annealing of self-organized silver nanocrystals [J].

Courty, A. ;

Henry, A.-I. ;

Goubet, N. ;

Pileni, M.-P. .

NATURE MATERIALS, 2007, 6 (11) :900-907

[4] Atomic-scale electron microscopy at ambient pressure [J].

Creemer, J. F. ;

Helveg, S. ;

Hoveling, G. H. ;

Ullmann, S. ;

Molenbroek, A. M. ;

Sarro, P. M. ;

Zandbergen, H. W. .

ULTRAMICROSCOPY, 2008, 108 (09) :993-998

[5] The hidden role of acetate in the PbSe nanocrystal synthesis [J].

Houtepen, Arjan J. ;

Koole, Rolf ;

Vanmaekelbergh, Daniel ;

Meeldijk, Johannes ;

Hickey, Stephen G. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (21) :6792-6793

[6] Spontaneous ordering of bimodal ensembles of nanoscopic gold clusters [J].

Kiely, CJ ;

Fink, J ;

Brust, M ;

Bethell, D ;

Schiffrin, DJ .

NATURE, 1998, 396 (6710) :444-446

[7] Dipolar structures in colloidal dispersions of PbSe and CdSe quantum dots [J].

Klokkenburg, Mark ;

Houtepen, Arjan J. ;

Koole, Rolf ;

de Folter, Julius W. J. ;

Erne, Ben H. ;

van Faassen, Ernst ;

Vanmaekelbergh, Daniel .

NANO LETTERS, 2007, 7 (09) :2931-2936

[8] Synthesis and characterization of PbSe quantum wires, multipods, quantum rods,and cubes [J].

Lifshitz, E ;

Bashouti, M ;

Kloper, V ;

Kigel, A ;

Eisen, MS ;

Berger, S .

NANO LETTERS, 2003, 3 (06) :857-862

[9] Variable orbital coupling in a two-dimensional quantum-dot solid probed on a local scale [J].

Liljeroth, Peter ;

Overgaag, Karin ;

Urbieta, Ana ;

Grandider, Bruno ;

Hickey, Stephen G. ;

Vanmaekelbergh, Daniel .

PHYSICAL REVIEW LETTERS, 2006, 97 (09)

[10] The Pb-Se (lead-selenium) system [J].

Lin, JC ;

Sharma, RC ;

Chang, YA .

JOURNAL OF PHASE EQUILIBRIA, 1996, 17 (03) :253-260

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