Photoluminescence of CdSe and CdSe/CdO · nH2O core/shell nanoparticles prepared in aqueous solution

Xingping Zhou; Zhiyu Shao; Yoshio Kobayashi; Xiaqin Wang; Noriaki Ohuchi; Motohiro Taketa; Atsuo Kasuya

doi:10.1016/j.optmat.2006.04.003

Photoluminescence of CdSe and CdSe/CdO · nH₂O core/shell nanoparticles prepared in aqueous solution

Xingping Zhou, Zhiyu Shao, Yoshio Kobayashi, Xiaqin Wang, Noriaki Ohuchi, Motohiro Taketa, Atsuo Kasuya

MED - Medical Sciences

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

CdSe sols with different colors were prepared by simply mixing CdSO₄ and NaSSeO₃ solutions under [Cd²⁺]/[Se^2-] ratios of 2.0-0.4 at room temperature. The nanoparticles, with average sizes of 1.8-3.6 nm, showed relatively narrow photoemission peaks at 522-556 nm. The strongest photoluminescence with a FWHM of 35 nm was obtained under [Cd²⁺]/[Se^2-] ratio of 1.2. The possible mechanism for achieving the strongest photoluminescence was proposed. Photoluminescence of these particles was greatly increased by surface modification of cadmium (II) hydrous oxide. The photoluminescence of these core-shell particles was kept constant in the pH range of 8.0-10.0, but dramatically decreased with an obvious blue-shifted peak while the pH was lower than 8.0. In addition, the photochemical oxidation of CdSe nanoparticles was markedly inhibited after they were modified with cadmium hydrous oxide.

Original language	English
Pages (from-to)	1048-1054
Number of pages	7
Journal	Optical Materials
Volume	29
Issue number	8
DOIs	https://doi.org/10.1016/j.optmat.2006.04.003
Publication status	Published - 2007 Apr

Keywords

Cadmium (II) hydrous oxide
CdSe
Photoluminescence (PL)
Stability
Surface modification
pH

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Computer Science(all)
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

Access to Document

10.1016/j.optmat.2006.04.003

Cite this

@article{b1964f6332d640b0b00e8f1b60f2b4e2,

title = "Photoluminescence of CdSe and CdSe/CdO · nH2O core/shell nanoparticles prepared in aqueous solution",

abstract = "CdSe sols with different colors were prepared by simply mixing CdSO4 and NaSSeO3 solutions under [Cd2+]/[Se2-] ratios of 2.0-0.4 at room temperature. The nanoparticles, with average sizes of 1.8-3.6 nm, showed relatively narrow photoemission peaks at 522-556 nm. The strongest photoluminescence with a FWHM of 35 nm was obtained under [Cd2+]/[Se2-] ratio of 1.2. The possible mechanism for achieving the strongest photoluminescence was proposed. Photoluminescence of these particles was greatly increased by surface modification of cadmium (II) hydrous oxide. The photoluminescence of these core-shell particles was kept constant in the pH range of 8.0-10.0, but dramatically decreased with an obvious blue-shifted peak while the pH was lower than 8.0. In addition, the photochemical oxidation of CdSe nanoparticles was markedly inhibited after they were modified with cadmium hydrous oxide.",

keywords = "Cadmium (II) hydrous oxide, CdSe, Photoluminescence (PL), Stability, Surface modification, pH",

author = "Xingping Zhou and Zhiyu Shao and Yoshio Kobayashi and Xiaqin Wang and Noriaki Ohuchi and Motohiro Taketa and Atsuo Kasuya",

note = "Funding Information: The authors gratefully thank the Welfare Department of the Japanese Government and Donghua University for their support through a research fund that made this research possible. ",

year = "2007",

month = apr,

doi = "10.1016/j.optmat.2006.04.003",

language = "English",

volume = "29",

pages = "1048--1054",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier",

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TY - JOUR

T1 - Photoluminescence of CdSe and CdSe/CdO · nH2O core/shell nanoparticles prepared in aqueous solution

AU - Zhou, Xingping

AU - Shao, Zhiyu

AU - Kobayashi, Yoshio

AU - Wang, Xiaqin

AU - Ohuchi, Noriaki

AU - Taketa, Motohiro

AU - Kasuya, Atsuo

N1 - Funding Information: The authors gratefully thank the Welfare Department of the Japanese Government and Donghua University for their support through a research fund that made this research possible.

PY - 2007/4

Y1 - 2007/4

N2 - CdSe sols with different colors were prepared by simply mixing CdSO4 and NaSSeO3 solutions under [Cd2+]/[Se2-] ratios of 2.0-0.4 at room temperature. The nanoparticles, with average sizes of 1.8-3.6 nm, showed relatively narrow photoemission peaks at 522-556 nm. The strongest photoluminescence with a FWHM of 35 nm was obtained under [Cd2+]/[Se2-] ratio of 1.2. The possible mechanism for achieving the strongest photoluminescence was proposed. Photoluminescence of these particles was greatly increased by surface modification of cadmium (II) hydrous oxide. The photoluminescence of these core-shell particles was kept constant in the pH range of 8.0-10.0, but dramatically decreased with an obvious blue-shifted peak while the pH was lower than 8.0. In addition, the photochemical oxidation of CdSe nanoparticles was markedly inhibited after they were modified with cadmium hydrous oxide.

AB - CdSe sols with different colors were prepared by simply mixing CdSO4 and NaSSeO3 solutions under [Cd2+]/[Se2-] ratios of 2.0-0.4 at room temperature. The nanoparticles, with average sizes of 1.8-3.6 nm, showed relatively narrow photoemission peaks at 522-556 nm. The strongest photoluminescence with a FWHM of 35 nm was obtained under [Cd2+]/[Se2-] ratio of 1.2. The possible mechanism for achieving the strongest photoluminescence was proposed. Photoluminescence of these particles was greatly increased by surface modification of cadmium (II) hydrous oxide. The photoluminescence of these core-shell particles was kept constant in the pH range of 8.0-10.0, but dramatically decreased with an obvious blue-shifted peak while the pH was lower than 8.0. In addition, the photochemical oxidation of CdSe nanoparticles was markedly inhibited after they were modified with cadmium hydrous oxide.

KW - Cadmium (II) hydrous oxide

KW - CdSe

KW - Photoluminescence (PL)

KW - Stability

KW - Surface modification

KW - pH

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