A method of detecting the single channel triaxial magnetic field information based on diamond nitrogen-vacancy(NV)color center is introduced.Firstly,the incident angle of the bias magnetic field which can achieve the ...A method of detecting the single channel triaxial magnetic field information based on diamond nitrogen-vacancy(NV)color center is introduced.Firstly,the incident angle of the bias magnetic field which can achieve the equal frequency difference optically-detected magnetic resonance(ODMR)spectrum of diamond NV color center is calculated theoretically,and the triaxial magnetic information solution model is also constructed.Secondly,the microwave time-controlled circuit module is designed to generate equal timing and equal frequency difference microwave pulse signals in one channel.Combining with the optical detection magnetic resonance technology,the purpose of sequentially locking and detecting the four formant signals on one side of the diamond NV color center(m_(s)=-1 state signal)is achieved,and the vector magnetic field information detection is accomplished by combining the triaxial magnetic information solution model.The system can obtain magnetic field detection in a range of 0 mT-0.82 mT.The system's magnetic noise sensitivity is 14.2 nT/Hz^(1/2),and the deviation angle errors of magnetic field detectionθ_(x) andθ_(y) are 1.3° and 8.2° respectively.展开更多
Electron paramagnetic resonance(EPR)is a spectroscopic approach that can directly and non-destructively detect and char-acterize species with unpaired electrons,such as radicals,transi-tion metal ions,defects in mater...Electron paramagnetic resonance(EPR)is a spectroscopic approach that can directly and non-destructively detect and char-acterize species with unpaired electrons,such as radicals,transi-tion metal ions,defects in materials,and the excited triplet state of molecules[1].To date,the EPR technique has become an indis-pensable component in the toolbox of environmental studies.Using various diamagnetic probes(e.g.,5,5-dimethyl-1-pyrroline-N-oxide(DMPO))as the spin traps,transient reactive species can be transformed to EPR-detectable(meta)stable spin adducts,which enables radical identification and mechanism interpretation.Therefore,EPR constitutes a versatile platform for the mechanistic investigation of advanced oxidation processes(AOPs)in the field of water purification and contaminated groundwater remediation[2].展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 51635011, 51805493, 51775522, 51727808, and 51922009)the Applied Basic Research Program in Shanxi Province,China (Grant No. 201901D111011(ZD))+3 种基金the Key Research and Development Program in Shanxi Province,China(Grant No. 201803D121067)the Fund from the Key Laboratory for Information Detection and Processing of Shanxi Province,China (Grant No. ISPT2020-2)the Fund from the Key Laboratory of Shanxi Province,China (Grant No. 201905D121001)the Shanxi “1331 Project” Key Subjects Construction,China
文摘A method of detecting the single channel triaxial magnetic field information based on diamond nitrogen-vacancy(NV)color center is introduced.Firstly,the incident angle of the bias magnetic field which can achieve the equal frequency difference optically-detected magnetic resonance(ODMR)spectrum of diamond NV color center is calculated theoretically,and the triaxial magnetic information solution model is also constructed.Secondly,the microwave time-controlled circuit module is designed to generate equal timing and equal frequency difference microwave pulse signals in one channel.Combining with the optical detection magnetic resonance technology,the purpose of sequentially locking and detecting the four formant signals on one side of the diamond NV color center(m_(s)=-1 state signal)is achieved,and the vector magnetic field information detection is accomplished by combining the triaxial magnetic information solution model.The system can obtain magnetic field detection in a range of 0 mT-0.82 mT.The system's magnetic noise sensitivity is 14.2 nT/Hz^(1/2),and the deviation angle errors of magnetic field detectionθ_(x) andθ_(y) are 1.3° and 8.2° respectively.
文摘Electron paramagnetic resonance(EPR)is a spectroscopic approach that can directly and non-destructively detect and char-acterize species with unpaired electrons,such as radicals,transi-tion metal ions,defects in materials,and the excited triplet state of molecules[1].To date,the EPR technique has become an indis-pensable component in the toolbox of environmental studies.Using various diamagnetic probes(e.g.,5,5-dimethyl-1-pyrroline-N-oxide(DMPO))as the spin traps,transient reactive species can be transformed to EPR-detectable(meta)stable spin adducts,which enables radical identification and mechanism interpretation.Therefore,EPR constitutes a versatile platform for the mechanistic investigation of advanced oxidation processes(AOPs)in the field of water purification and contaminated groundwater remediation[2].
