Role of organosulfur compounds in the growth and final surface chemistry of PbS quantum dots

Martin R. McPhail, Emily A Weiss

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

This paper describes the mechanism by which reaction of sulfur with 1-octadecene (ODE) induces a change in the shape of PbS quantum dots (QDs), synthesized from the S/ODE precursor and lead(II) oleate, from cubic to hexapodal by altering the ligand chemistry of the growing QDs. 1H NMR and optical spectroscopies indicate that extended heating of sulfur and ODE at 180 °C produces a series of organosulfur compounds with optical transitions in the visible region and that the binding of organosulfur ligands to the growing QD induces a preferential growth at the 100 faces (over the 111 faces) and, therefore, a hexapodal geometry for the particles. The study shows that S/ODE can be made a more reliable precursor by reducing the temperature and duration of the sulfur dissolution step and that any metal sulfide QD synthesis using elemental sulfur heated to high temperatures should take steps to reduce the in situ yield of organosulfur byproducts by avoiding olefinic solvents.

Original languageEnglish
Pages (from-to)3377-3384
Number of pages8
JournalChemistry of Materials
Volume26
Issue number11
DOIs
Publication statusPublished - Jun 10 2014

Fingerprint

Surface chemistry
Sulfur
Semiconductor quantum dots
Ligands
Optical transitions
Sulfides
Oleic Acid
Nuclear magnetic resonance spectroscopy
Byproducts
Dissolution
Lead
Metals
Heating
Temperature
Geometry
1-octadecene

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Role of organosulfur compounds in the growth and final surface chemistry of PbS quantum dots. / McPhail, Martin R.; Weiss, Emily A.

In: Chemistry of Materials, Vol. 26, No. 11, 10.06.2014, p. 3377-3384.

Research output: Contribution to journalArticle

@article{fabe83a5e1c2494baa7b4b80f2f4b446,
title = "Role of organosulfur compounds in the growth and final surface chemistry of PbS quantum dots",
abstract = "This paper describes the mechanism by which reaction of sulfur with 1-octadecene (ODE) induces a change in the shape of PbS quantum dots (QDs), synthesized from the S/ODE precursor and lead(II) oleate, from cubic to hexapodal by altering the ligand chemistry of the growing QDs. 1H NMR and optical spectroscopies indicate that extended heating of sulfur and ODE at 180 °C produces a series of organosulfur compounds with optical transitions in the visible region and that the binding of organosulfur ligands to the growing QD induces a preferential growth at the 100 faces (over the 111 faces) and, therefore, a hexapodal geometry for the particles. The study shows that S/ODE can be made a more reliable precursor by reducing the temperature and duration of the sulfur dissolution step and that any metal sulfide QD synthesis using elemental sulfur heated to high temperatures should take steps to reduce the in situ yield of organosulfur byproducts by avoiding olefinic solvents.",
author = "McPhail, {Martin R.} and Weiss, {Emily A}",
year = "2014",
month = "6",
day = "10",
doi = "10.1021/cm4040819",
language = "English",
volume = "26",
pages = "3377--3384",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "11",

}

TY - JOUR

T1 - Role of organosulfur compounds in the growth and final surface chemistry of PbS quantum dots

AU - McPhail, Martin R.

AU - Weiss, Emily A

PY - 2014/6/10

Y1 - 2014/6/10

N2 - This paper describes the mechanism by which reaction of sulfur with 1-octadecene (ODE) induces a change in the shape of PbS quantum dots (QDs), synthesized from the S/ODE precursor and lead(II) oleate, from cubic to hexapodal by altering the ligand chemistry of the growing QDs. 1H NMR and optical spectroscopies indicate that extended heating of sulfur and ODE at 180 °C produces a series of organosulfur compounds with optical transitions in the visible region and that the binding of organosulfur ligands to the growing QD induces a preferential growth at the 100 faces (over the 111 faces) and, therefore, a hexapodal geometry for the particles. The study shows that S/ODE can be made a more reliable precursor by reducing the temperature and duration of the sulfur dissolution step and that any metal sulfide QD synthesis using elemental sulfur heated to high temperatures should take steps to reduce the in situ yield of organosulfur byproducts by avoiding olefinic solvents.

AB - This paper describes the mechanism by which reaction of sulfur with 1-octadecene (ODE) induces a change in the shape of PbS quantum dots (QDs), synthesized from the S/ODE precursor and lead(II) oleate, from cubic to hexapodal by altering the ligand chemistry of the growing QDs. 1H NMR and optical spectroscopies indicate that extended heating of sulfur and ODE at 180 °C produces a series of organosulfur compounds with optical transitions in the visible region and that the binding of organosulfur ligands to the growing QD induces a preferential growth at the 100 faces (over the 111 faces) and, therefore, a hexapodal geometry for the particles. The study shows that S/ODE can be made a more reliable precursor by reducing the temperature and duration of the sulfur dissolution step and that any metal sulfide QD synthesis using elemental sulfur heated to high temperatures should take steps to reduce the in situ yield of organosulfur byproducts by avoiding olefinic solvents.

UR - http://www.scopus.com/inward/record.url?scp=84902147145&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84902147145&partnerID=8YFLogxK

U2 - 10.1021/cm4040819

DO - 10.1021/cm4040819

M3 - Article

AN - SCOPUS:84902147145

VL - 26

SP - 3377

EP - 3384

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 11

ER -