Hydroxylation of the surface of PbS nanocrystals passivated with oleic acid

被引：419

作者：

Zherebetskyy, Danylo ^{[1
]}

Scheele, Marcus ^{[1
,2
]}

Zhang, Yingjie ^{[1
,3
]}

Bronstein, Noah ^{[2
]}

Thompson, Christopher ^{[1
,2
]}

Britt, David ^{[4
]}

Salmeron, Miquel ^{[1
]}

Alivisatos, Paul ^{[1
,2
]}

Wang, Lin-Wang ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Appl Sci & Technol Grad Program, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA

来源：

SCIENCE | 2014年 / 344卷 / 6190期

关键词：

COLLOIDAL NANOCRYSTALS; SHAPE; WATER; DISSOCIATION; CHEMISTRY; EVOLUTION; FACETS; GROWTH; POLAR;

D O I：

10.1126/science.1252727

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 the structure of colloidal nanocrystals (NCs) is key to the generation of their complex functionality. This requires an understanding of the NC surface at the atomic level. The structure of colloidal PbS NCs passivated with oleic acid has been studied theoretically and experimentally. We show the existence of surface OH-groups, which play a key role in stabilizing the PbS(111) facets, consistent with x-ray photoelectron spectroscopy as well as other spectroscopic and chemical experiments. The role of water in the synthesis process is also revealed. Our model, along with existing observations of NC surface termination and passivation by ligands, helps to explain and predict the properties of NCs and their assemblies.

引用

页码：1380 / 1384

页数：5

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