In situ analysis of free radicals from the photodecomposition of hydrogen peroxide using a frequency-mixing magnetic detector

Hyobong Hong; Hans Joachim Krause; Kibong Song; Chel Jong Choi

doi:10.1063/1.4742740

In situ analysis of free radicals from the photodecomposition of hydrogen peroxide using a frequency-mixing magnetic detector

Hyobong Hong
, Hans Joachim Krause
, Kibong Song
, Chel Jong Choi^*

^*Corresponding author for this work

Department of Semiconductor Science and Technology

Electronics and Telecommunications Research Institute
Jülich Research Centre

Research output: Contribution to journal › Journal article › peer-review

8 Scopus citations

Abstract

We present an analytical method for the real-time detection of free radicals from the photodecomposition (ultraviolet radiation, λ 254 nm) of hydrogen peroxide (H ₂O ₂) using frequency-mixing magnetic detection. We monitored the free radicals in situ without catalysts or probe molecules. Both water and H ₂O ₂ produced frequency-mixing signals under UV radiation, but the water signal was much weaker. The root mean square amplitude of the frequency-mixing signal was found to depend on the initial H ₂O ₂ concentration. Considering the physical properties of the reactants, the frequency-mixing signal is attributed to the generation of paramagnetic free radicals by the photodecomposition of H ₂O ₂.

Original language	English
Article number	054105
Journal	Applied Physics Letters
Volume	101
Issue number	5
DOIs	https://doi.org/10.1063/1.4742740
State	Published - 2012.07.30

Quacquarelli Symonds(QS) Subject Topics

Physics & Astronomy

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10.1063/1.4742740

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@article{43f3486ee86647f7991db44145508b1f,

title = "In situ analysis of free radicals from the photodecomposition of hydrogen peroxide using a frequency-mixing magnetic detector",

abstract = "We present an analytical method for the real-time detection of free radicals from the photodecomposition (ultraviolet radiation, λ 254 nm) of hydrogen peroxide (H 2O 2) using frequency-mixing magnetic detection. We monitored the free radicals in situ without catalysts or probe molecules. Both water and H 2O 2 produced frequency-mixing signals under UV radiation, but the water signal was much weaker. The root mean square amplitude of the frequency-mixing signal was found to depend on the initial H 2O 2 concentration. Considering the physical properties of the reactants, the frequency-mixing signal is attributed to the generation of paramagnetic free radicals by the photodecomposition of H 2O 2.",

author = "Hyobong Hong and Krause, \{Hans Joachim\} and Kibong Song and Choi, \{Chel Jong\}",

year = "2012",

month = jul,

day = "30",

doi = "10.1063/1.4742740",

language = "English",

volume = "101",

journal = "Applied Physics Letters",

issn = "0003-6951",

number = "5",

}

TY - JOUR

T1 - In situ analysis of free radicals from the photodecomposition of hydrogen peroxide using a frequency-mixing magnetic detector

AU - Hong, Hyobong

AU - Krause, Hans Joachim

AU - Song, Kibong

AU - Choi, Chel Jong

PY - 2012/7/30

Y1 - 2012/7/30

N2 - We present an analytical method for the real-time detection of free radicals from the photodecomposition (ultraviolet radiation, λ 254 nm) of hydrogen peroxide (H 2O 2) using frequency-mixing magnetic detection. We monitored the free radicals in situ without catalysts or probe molecules. Both water and H 2O 2 produced frequency-mixing signals under UV radiation, but the water signal was much weaker. The root mean square amplitude of the frequency-mixing signal was found to depend on the initial H 2O 2 concentration. Considering the physical properties of the reactants, the frequency-mixing signal is attributed to the generation of paramagnetic free radicals by the photodecomposition of H 2O 2.

AB - We present an analytical method for the real-time detection of free radicals from the photodecomposition (ultraviolet radiation, λ 254 nm) of hydrogen peroxide (H 2O 2) using frequency-mixing magnetic detection. We monitored the free radicals in situ without catalysts or probe molecules. Both water and H 2O 2 produced frequency-mixing signals under UV radiation, but the water signal was much weaker. The root mean square amplitude of the frequency-mixing signal was found to depend on the initial H 2O 2 concentration. Considering the physical properties of the reactants, the frequency-mixing signal is attributed to the generation of paramagnetic free radicals by the photodecomposition of H 2O 2.

UR - https://www.scopus.com/pages/publications/84864651739

U2 - 10.1063/1.4742740

DO - 10.1063/1.4742740

M3 - Journal article

AN - SCOPUS:84864651739

SN - 0003-6951

VL - 101

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 5

M1 - 054105

ER -

In situ analysis of free radicals from the photodecomposition of hydrogen peroxide using a frequency-mixing magnetic detector

Abstract

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