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Title: Sulfur in oleylamine as a powerful and versatile etchant for oxide, sulfide, and metal colloidal nanoparticles: Sulfur in oleylamine as a powerful and versatile etchant

Abstract

Understanding of crystal growth is essential to the design of materials with improved properties. Unfortunately, still very little is understood about the basic growth mechanisms of nanostructures, even in the most established colloidal synthetic routes. Etching is one of the most important mechanisms to consider during particle growth, but it is rarely considered in the syntheses of oxide or chalcogenide nanostructures. Here in this paper, we report that the most common precursor for the synthesis of sulfide nanostructures – the mixture of sulfur and oleylamine – acts as a very powerful etchant for oxide, chalcogenide, and metal nanostructures. Specifically, we discuss its effect on several nanoparticle compositions (PbS, Cu2S, Fe3O4, and Au) and compare it to control conditions in which only oleylamine is present. Our experiments suggest that the etching results from the evolution of H2S from the sulfur–oleylamine precursor. We predict that the simultaneous role of this precursor as both etchant and ligand stabilizer will make it a useful tool for the chemical post-processing (e.g., size reduction, focusing of size distributions, faceting) of nanocrystal dispersions.

Authors:
 [1];  [2];  [2];  [3];  [4]
  1. Iowa State Univ., Ames, IA (United States). Dept. of Materials Science & Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Chemical & Biological Engineering
  2. Iowa State Univ., Ames, IA (United States). Dept. of Materials Science & Engineering
  3. Ames Laboratory, U.S. Department of Energy, Ames IA 50011 USA
  4. Iowa State Univ., Ames, IA (United States). Dept. of Materials Science & Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Chemical & Biological Engineering; Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1368058
Report Number(s):
IS-J-9355
Journal ID: ISSN 1862-6300
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physica Status Solidi. A, Applications and Materials Science
Additional Journal Information:
Journal Volume: 214; Journal Issue: 5; Journal ID: ISSN 1862-6300
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; PbS; Fe3O4; copper sulfide; Au; gold; oleylamine

Citation Formats

Yuan, Bin, Tian, Xinchun, Shaw, Santosh, Petersen, Reese E., and Cademartiri, Ludovico. Sulfur in oleylamine as a powerful and versatile etchant for oxide, sulfide, and metal colloidal nanoparticles: Sulfur in oleylamine as a powerful and versatile etchant. United States: N. p., 2016. Web. doi:10.1002/pssa.201600543.
Yuan, Bin, Tian, Xinchun, Shaw, Santosh, Petersen, Reese E., & Cademartiri, Ludovico. Sulfur in oleylamine as a powerful and versatile etchant for oxide, sulfide, and metal colloidal nanoparticles: Sulfur in oleylamine as a powerful and versatile etchant. United States. doi:10.1002/pssa.201600543.
Yuan, Bin, Tian, Xinchun, Shaw, Santosh, Petersen, Reese E., and Cademartiri, Ludovico. Wed . "Sulfur in oleylamine as a powerful and versatile etchant for oxide, sulfide, and metal colloidal nanoparticles: Sulfur in oleylamine as a powerful and versatile etchant". United States. doi:10.1002/pssa.201600543. https://www.osti.gov/servlets/purl/1368058.
@article{osti_1368058,
title = {Sulfur in oleylamine as a powerful and versatile etchant for oxide, sulfide, and metal colloidal nanoparticles: Sulfur in oleylamine as a powerful and versatile etchant},
author = {Yuan, Bin and Tian, Xinchun and Shaw, Santosh and Petersen, Reese E. and Cademartiri, Ludovico},
abstractNote = {Understanding of crystal growth is essential to the design of materials with improved properties. Unfortunately, still very little is understood about the basic growth mechanisms of nanostructures, even in the most established colloidal synthetic routes. Etching is one of the most important mechanisms to consider during particle growth, but it is rarely considered in the syntheses of oxide or chalcogenide nanostructures. Here in this paper, we report that the most common precursor for the synthesis of sulfide nanostructures – the mixture of sulfur and oleylamine – acts as a very powerful etchant for oxide, chalcogenide, and metal nanostructures. Specifically, we discuss its effect on several nanoparticle compositions (PbS, Cu2S, Fe3O4, and Au) and compare it to control conditions in which only oleylamine is present. Our experiments suggest that the etching results from the evolution of H2S from the sulfur–oleylamine precursor. We predict that the simultaneous role of this precursor as both etchant and ligand stabilizer will make it a useful tool for the chemical post-processing (e.g., size reduction, focusing of size distributions, faceting) of nanocrystal dispersions.},
doi = {10.1002/pssa.201600543},
journal = {Physica Status Solidi. A, Applications and Materials Science},
number = 5,
volume = 214,
place = {United States},
year = {2016},
month = {11}
}

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