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Effect of Silver Ion‐Exchange on the Precipitation of Lead Sulfide Quantum Dots in Glasses

This article reports the effect of Ag+ ion‐exchange on the precipitation of PbS quantum dots (QDs) in silicate glasses. The glasses were subjected to ion‐exchange in AgNO3 salt melts at 260°C for 60 s. Ag nanoparticles (NPs) and PbS QDs precipitated after heat treatment at temperatures of 440°C–460°... Full description

Journal Title: Journal of the American Ceramic Society September 2012, Vol.95(9), pp.2880-2884
Main Author: Xu, Kai
Other Authors: Heo, Jong
Format: Electronic Article Electronic Article
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ID: ISSN: 0002-7820 ; E-ISSN: 1551-2916 ; DOI: 10.1111/j.1551-2916.2012.05313.x
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recordid: wj10.1111/j.1551-2916.2012.05313.x
title: Effect of Silver Ion‐Exchange on the Precipitation of Lead Sulfide Quantum Dots in Glasses
format: Article
creator:
  • Xu, Kai
  • Heo, Jong
subjects:
  • Public Television
  • Sulfides
  • Precipitation (Meteorology)
ispartof: Journal of the American Ceramic Society, September 2012, Vol.95(9), pp.2880-2884
description: This article reports the effect of Ag+ ion‐exchange on the precipitation of PbS quantum dots (QDs) in silicate glasses. The glasses were subjected to ion‐exchange in AgNO3 salt melts at 260°C for 60 s. Ag nanoparticles (NPs) and PbS QDs precipitated after heat treatment at temperatures of 440°C–460°C for 10 h. Photoluminescence wavelength λPL of PbS QDs was longer (~1525 ≤ λPL ≤ ~1580 nm) in Ag+ ion‐exchanged regions than in Ag+‐free regions (~1030 ≤ λPL ≤ ~1200 nm). Average diameter D of PbS QDs estimated by calculation and TEM images was larger in Ag+ ion‐exchanged regions (~5.2 ≤ D ≤ ~5.5 nm) than in Ag+‐free regions (~2.4 ≤ D ≤ ~3.3 nm). Ag NPs that formed during heat treatment provided the sites for heterogeneous nucleation of PbS QDs and promoted the precipitation of PbS QDs in glasses.
language:
source:
identifier: ISSN: 0002-7820 ; E-ISSN: 1551-2916 ; DOI: 10.1111/j.1551-2916.2012.05313.x
fulltext: fulltext
issn:
  • 0002-7820
  • 00027820
  • 1551-2916
  • 15512916
url: Link


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descriptionThis article reports the effect of Ag+ ion‐exchange on the precipitation of PbS quantum dots (QDs) in silicate glasses. The glasses were subjected to ion‐exchange in AgNO3 salt melts at 260°C for 60 s. Ag nanoparticles (NPs) and PbS QDs precipitated after heat treatment at temperatures of 440°C–460°C for 10 h. Photoluminescence wavelength λPL of PbS QDs was longer (~1525 ≤ λPL ≤ ~1580 nm) in Ag+ ion‐exchanged regions than in Ag+‐free regions (~1030 ≤ λPL ≤ ~1200 nm). Average diameter D of PbS QDs estimated by calculation and TEM images was larger in Ag+ ion‐exchanged regions (~5.2 ≤ D ≤ ~5.5 nm) than in Ag+‐free regions (~2.4 ≤ D ≤ ~3.3 nm). Ag NPs that formed during heat treatment provided the sites for heterogeneous nucleation of PbS QDs and promoted the precipitation of PbS QDs in glasses.
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titleEffect of Silver Ion‐Exchange on the Precipitation of Lead Sulfide Quantum Dots in Glasses
descriptionThis article reports the effect of Ag+ ion‐exchange on the precipitation of PbS quantum dots (QDs) in silicate glasses. The glasses were subjected to ion‐exchange in AgNO3 salt melts at 260°C for 60 s. Ag nanoparticles (NPs) and PbS QDs precipitated after heat treatment at temperatures of 440°C–460°C for 10 h. Photoluminescence wavelength λPL of PbS QDs was longer (~1525 ≤ λPL ≤ ~1580 nm) in Ag+ ion‐exchanged regions than in Ag+‐free regions (~1030 ≤ λPL ≤ ~1200 nm). Average diameter D of PbS QDs estimated by calculation and TEM images was larger in Ag+ ion‐exchanged regions (~5.2 ≤ D ≤ ~5.5 nm) than in Ag+‐free regions (~2.4 ≤ D ≤ ~3.3 nm). Ag NPs that formed during heat treatment provided the sites for heterogeneous nucleation of PbS QDs and promoted the precipitation of PbS QDs in glasses.
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abstractThis article reports the effect of Ag+ ion‐exchange on the precipitation of PbS quantum dots (QDs) in silicate glasses. The glasses were subjected to ion‐exchange in AgNO3 salt melts at 260°C for 60 s. Ag nanoparticles (NPs) and PbS QDs precipitated after heat treatment at temperatures of 440°C–460°C for 10 h. Photoluminescence wavelength λPL of PbS QDs was longer (~1525 ≤ λPL ≤ ~1580 nm) in Ag+ ion‐exchanged regions than in Ag+‐free regions (~1030 ≤ λPL ≤ ~1200 nm). Average diameter D of PbS QDs estimated by calculation and TEM images was larger in Ag+ ion‐exchanged regions (~5.2 ≤ D ≤ ~5.5 nm) than in Ag+‐free regions (~2.4 ≤ D ≤ ~3.3 nm). Ag NPs that formed during heat treatment provided the sites for heterogeneous nucleation of PbS QDs and promoted the precipitation of PbS QDs in glasses.
doi10.1111/j.1551-2916.2012.05313.x
pages2880-2884
date2012-09