Structural confinement effects of an amorphous magneto-semiconductor within nanochannels

Weon Sik Chae, Kyoung Hoon Choi, Yong Rok Kim, Jin Seung Jung, Leszek Malkinski, Charles J. O'Connor

Research output: Contribution to journalArticle

Abstract

Optical and magnetic properties have been investigated for the structurally confined amorphous magneto-semiconductor, ternary chalcogenide, within the nanochannels of the mesoporous host. The structural confinement induced a weak crystallographic ordering of the magneto-semiconductor within the nanochannels. Unique optical properties were observed for this nanocomposite, which were possibly due to the size and energy quantization of the confined guest chalcogenide within the nanochannels. The structural confinement also induced the suppression of the phonon coupling to the photoexcited carriers during the carriers' recombination process. The spin-glass freezing temperature (T f = 4.2 K) which was the characteristic magnetic transition temperature for the amorphous bulk was shifted to 2.3 K for the confined system, possibly due to the generation of the superparamagnetic domains induced by the quantum confinement effect.

Original languageEnglish
Pages (from-to)209-217
Number of pages9
JournalJournal of the Chinese Chemical Society
Volume53
Issue number1
DOIs
Publication statusPublished - 2006 Jan 1

Fingerprint

Plasma confinement
Optical properties
Semiconductor materials
Quantum confinement
Spin glass
Freezing
Magnetic properties
Nanocomposites
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Chae, Weon Sik ; Choi, Kyoung Hoon ; Kim, Yong Rok ; Jung, Jin Seung ; Malkinski, Leszek ; O'Connor, Charles J. / Structural confinement effects of an amorphous magneto-semiconductor within nanochannels. In: Journal of the Chinese Chemical Society. 2006 ; Vol. 53, No. 1. pp. 209-217.
@article{73d1a2838237429497b58ac8a7994595,
title = "Structural confinement effects of an amorphous magneto-semiconductor within nanochannels",
abstract = "Optical and magnetic properties have been investigated for the structurally confined amorphous magneto-semiconductor, ternary chalcogenide, within the nanochannels of the mesoporous host. The structural confinement induced a weak crystallographic ordering of the magneto-semiconductor within the nanochannels. Unique optical properties were observed for this nanocomposite, which were possibly due to the size and energy quantization of the confined guest chalcogenide within the nanochannels. The structural confinement also induced the suppression of the phonon coupling to the photoexcited carriers during the carriers' recombination process. The spin-glass freezing temperature (T f = 4.2 K) which was the characteristic magnetic transition temperature for the amorphous bulk was shifted to 2.3 K for the confined system, possibly due to the generation of the superparamagnetic domains induced by the quantum confinement effect.",
author = "Chae, {Weon Sik} and Choi, {Kyoung Hoon} and Kim, {Yong Rok} and Jung, {Jin Seung} and Leszek Malkinski and O'Connor, {Charles J.}",
year = "2006",
month = "1",
day = "1",
doi = "10.1002/jccs.200600023",
language = "English",
volume = "53",
pages = "209--217",
journal = "Journal of the Chinese Chemical Society",
issn = "0009-4536",
publisher = "Chinese Chemical Society",
number = "1",

}

Structural confinement effects of an amorphous magneto-semiconductor within nanochannels. / Chae, Weon Sik; Choi, Kyoung Hoon; Kim, Yong Rok; Jung, Jin Seung; Malkinski, Leszek; O'Connor, Charles J.

In: Journal of the Chinese Chemical Society, Vol. 53, No. 1, 01.01.2006, p. 209-217.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Structural confinement effects of an amorphous magneto-semiconductor within nanochannels

AU - Chae, Weon Sik

AU - Choi, Kyoung Hoon

AU - Kim, Yong Rok

AU - Jung, Jin Seung

AU - Malkinski, Leszek

AU - O'Connor, Charles J.

PY - 2006/1/1

Y1 - 2006/1/1

N2 - Optical and magnetic properties have been investigated for the structurally confined amorphous magneto-semiconductor, ternary chalcogenide, within the nanochannels of the mesoporous host. The structural confinement induced a weak crystallographic ordering of the magneto-semiconductor within the nanochannels. Unique optical properties were observed for this nanocomposite, which were possibly due to the size and energy quantization of the confined guest chalcogenide within the nanochannels. The structural confinement also induced the suppression of the phonon coupling to the photoexcited carriers during the carriers' recombination process. The spin-glass freezing temperature (T f = 4.2 K) which was the characteristic magnetic transition temperature for the amorphous bulk was shifted to 2.3 K for the confined system, possibly due to the generation of the superparamagnetic domains induced by the quantum confinement effect.

AB - Optical and magnetic properties have been investigated for the structurally confined amorphous magneto-semiconductor, ternary chalcogenide, within the nanochannels of the mesoporous host. The structural confinement induced a weak crystallographic ordering of the magneto-semiconductor within the nanochannels. Unique optical properties were observed for this nanocomposite, which were possibly due to the size and energy quantization of the confined guest chalcogenide within the nanochannels. The structural confinement also induced the suppression of the phonon coupling to the photoexcited carriers during the carriers' recombination process. The spin-glass freezing temperature (T f = 4.2 K) which was the characteristic magnetic transition temperature for the amorphous bulk was shifted to 2.3 K for the confined system, possibly due to the generation of the superparamagnetic domains induced by the quantum confinement effect.

UR - http://www.scopus.com/inward/record.url?scp=34047113852&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34047113852&partnerID=8YFLogxK

U2 - 10.1002/jccs.200600023

DO - 10.1002/jccs.200600023

M3 - Article

VL - 53

SP - 209

EP - 217

JO - Journal of the Chinese Chemical Society

JF - Journal of the Chinese Chemical Society

SN - 0009-4536

IS - 1

ER -