Ultrathin PbS Sheets by Two-Dimensional Oriented Attachment

被引：731

作者：

Schliehe, Constanze ^{[1
]}

Juarez, Beatriz H. ^{[2
]}

Pelletier, Marie ^{[1
]}

Jander, Sebastian ^{[1
]}

Greshnykh, Denis ^{[1
]}

Nagel, Mona ^{[1
]}

Meyer, Andreas ^{[1
]}

Foerster, Stephan ^{[1
]}

Kornowski, Andreas ^{[1
]}

Klinke, Christian ^{[1
]}

Weller, Horst ^{[1
]}

机构：

[1] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

[2] IMDEA Nanosci, Madrid 28049, Spain

来源：

SCIENCE | 2010年 / 329卷 / 5991期

关键词：

NANOCRYSTALS; AGGREGATION; GROWTH; PHASE; SHAPE; SIZE;

D O I：

10.1126/science.1188035

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Controlling anisotropy is a key concept in the generation of complex functionality in advanced materials. For this concept, oriented attachment of nanocrystal building blocks, a self-assembly of particles into larger single-crystalline objects, is one of the most promising approaches in nanotechnology. We report here the two-dimensional oriented attachment of lead sulfide (PbS) nanocrystals into ultrathin single-crystal sheets with dimensions on the micrometer scale. We found that this process is initiated by cosolvents, which alter nucleation and growth rates during the primary nanocrystal formation, and is finally driven by dense packing of oleic acid ligands on {100} facets of PbS. The obtained nanosheets can be readily integrated in a photodetector device without further treatment.

引用

页码：550 / 553

页数：4

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