Hydroxylation of the surface of PbS nanocrystals passivated with oleic acid

Danylo Zherebetskyy, Marcus Scheele, Yingjie Zhang, Noah Bronstein, Christopher Thompson, David Britt, Miquel Salmeron, Paul Alivisatos, Lin Wang Wang

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1380-1384
Number of pages5
JournalScience
Volume344
Issue number6190
DOIs
StatePublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • General

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