%0 Journal Article
%A Hong, H.B.
%A Krause, H.-J.
%A Song, K.
%A Choi, C.-J.
%T In situ analysis of free radicals from the photodecomposition of hydrogen peroxide using a frequency-mixing magnetic detector
%J Applied physics letters
%V 101
%@ 0003-6951
%C Melville, NY
%I American Institute of Physics
%M PreJuSER-22814
%P 054105
%D 2012
%Z This research was supported financially by the Converging Research Center Program (2011K000677) and the World Class University (WCU) Program (R31-20029) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, Republic of Korea.
%X We present an analytical method for the real-time detection of free radicals from the photodecomposition (ultraviolet radiation, lambda = 254 nm) of hydrogen peroxide (H2O2) using frequency-mixing magnetic detection. We monitored the free radicals in situ without catalysts or probe molecules. Both water and H2O2 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 H2O2 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 H2O2. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.47427401
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000307676600111
%R 10.1063/1.4742740
%U https://juser.fz-juelich.de/record/22814