Singlet oxygen generation by nanoporous silicon: photoluminescence dynamics in magnetic field

Gazimagomed Aliev; Jamaree Amonkosolpan; Daniel Wolverson

doi:10.1088/1361-6528/ab4442

Singlet oxygen generation by nanoporous silicon: photoluminescence dynamics in magnetic field

Gazimagomed Aliev, Jamaree Amonkosolpan, Daniel Wolverson

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

3 Citations (SciVal)

Abstract

Singlet oxygen generation in porous silicon (PSi) was investigated by a magneto-optical experiment. Photoluminescence (PL) quenching due to an energy transfer (ET) process mediated by an exchange interaction was monitored in the spectral range 1.4-2.5 eV and in a magnetic field of 0-6 Tesla at different levels of oxygen concentration and excitation pump power. When a magnetic field was applied, both PL recovery and, for magnetic fields below 2 Tesla and high concentrations of oxygen, an unusual additional pump power dependent quenching of the PL was observed. A rate equation model describing the behavior of PL from PSi with oxygen adsorbed at cryogenic temperatures in magnetic field was developed. The model has been expanded to cover the ET process as a function of the nanoparticle size.

Original language	English
Article number	035703
Pages (from-to)	1-13
Number of pages	13
Journal	Nanotechnology
Volume	31
Issue number	3
DOIs	https://doi.org/10.1088/1361-6528/ab4442
Publication status	Published - 18 Oct 2019

Bibliographical note

Publisher Copyright:
© 2019 IOP Publishing Ltd.

Keywords

Porous silicon
energy transfer
exchange mechanism
magnetic field
photoluminescence
photosensitizing
singlet oxygen

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

Access to Document

10.1088/1361-6528/ab4442Licence: CC BY

Cite this

@article{0c85b11cba4647729c9edb7373024686,

title = "Singlet oxygen generation by nanoporous silicon: photoluminescence dynamics in magnetic field",

abstract = "Singlet oxygen generation in porous silicon (PSi) was investigated by a magneto-optical experiment. Photoluminescence (PL) quenching due to an energy transfer (ET) process mediated by an exchange interaction was monitored in the spectral range 1.4-2.5 eV and in a magnetic field of 0-6 Tesla at different levels of oxygen concentration and excitation pump power. When a magnetic field was applied, both PL recovery and, for magnetic fields below 2 Tesla and high concentrations of oxygen, an unusual additional pump power dependent quenching of the PL was observed. A rate equation model describing the behavior of PL from PSi with oxygen adsorbed at cryogenic temperatures in magnetic field was developed. The model has been expanded to cover the ET process as a function of the nanoparticle size.",

keywords = "Porous silicon, energy transfer, exchange mechanism, magnetic field, photoluminescence, photosensitizing, singlet oxygen",

author = "Gazimagomed Aliev and Jamaree Amonkosolpan and Daniel Wolverson",

note = "Publisher Copyright: {\textcopyright} 2019 IOP Publishing Ltd.",

year = "2019",

month = oct,

day = "18",

doi = "10.1088/1361-6528/ab4442",

language = "English",

volume = "31",

pages = "1--13",

journal = "Nanotechnology",

issn = "0957-4484",

publisher = "IOP Publishing",

number = "3",

}

TY - JOUR

T1 - Singlet oxygen generation by nanoporous silicon: photoluminescence dynamics in magnetic field

AU - Aliev, Gazimagomed

AU - Amonkosolpan, Jamaree

AU - Wolverson, Daniel

PY - 2019/10/18

Y1 - 2019/10/18

N2 - Singlet oxygen generation in porous silicon (PSi) was investigated by a magneto-optical experiment. Photoluminescence (PL) quenching due to an energy transfer (ET) process mediated by an exchange interaction was monitored in the spectral range 1.4-2.5 eV and in a magnetic field of 0-6 Tesla at different levels of oxygen concentration and excitation pump power. When a magnetic field was applied, both PL recovery and, for magnetic fields below 2 Tesla and high concentrations of oxygen, an unusual additional pump power dependent quenching of the PL was observed. A rate equation model describing the behavior of PL from PSi with oxygen adsorbed at cryogenic temperatures in magnetic field was developed. The model has been expanded to cover the ET process as a function of the nanoparticle size.

AB - Singlet oxygen generation in porous silicon (PSi) was investigated by a magneto-optical experiment. Photoluminescence (PL) quenching due to an energy transfer (ET) process mediated by an exchange interaction was monitored in the spectral range 1.4-2.5 eV and in a magnetic field of 0-6 Tesla at different levels of oxygen concentration and excitation pump power. When a magnetic field was applied, both PL recovery and, for magnetic fields below 2 Tesla and high concentrations of oxygen, an unusual additional pump power dependent quenching of the PL was observed. A rate equation model describing the behavior of PL from PSi with oxygen adsorbed at cryogenic temperatures in magnetic field was developed. The model has been expanded to cover the ET process as a function of the nanoparticle size.

KW - Porous silicon

KW - energy transfer

KW - exchange mechanism

KW - magnetic field

KW - photoluminescence

KW - photosensitizing

KW - singlet oxygen

UR - http://www.scopus.com/inward/record.url?scp=85073646926&partnerID=8YFLogxK

U2 - 10.1088/1361-6528/ab4442

DO - 10.1088/1361-6528/ab4442

M3 - Article

SN - 0957-4484

VL - 31

SP - 1

EP - 13

JO - Nanotechnology

JF - Nanotechnology

IS - 3

M1 - 035703

ER -

Singlet oxygen generation by nanoporous silicon: photoluminescence dynamics in magnetic field

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Spin-Dependent Phenomena Mediated by Silicon Nanocrystal Assemblies

Dataset for "Singlet oxygen generation by nanoporous silicon: photoluminescence dynamics in magnetic field"

Cite this

Singlet oxygen generation by nanoporous silicon: photoluminescence dynamics in magnetic field

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Projects

Spin-Dependent Phenomena Mediated by Silicon Nanocrystal Assemblies

Datasets

Dataset for "Singlet oxygen generation by nanoporous silicon: photoluminescence dynamics in magnetic field"

Cite this