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Au/Ag_(2)S dimeric nanostructures for highly specific plasmonic sensing of mercury(Ⅱ)

Chinese Chemical Letters 2023年第3期34卷 142-147页

作者： Xinyi Liang Xu Du Ao Liu Zhixiong Cai Jingwen Li Maosheng Zhang Qingxiang Wang Jingbin Zeng College of Chemistry and Chemical Engineering and State key laboratory of Heavy Oil Processing China University of Petroleum(East China)Qingdao 266580China College of Chemistry and Environment Fujian Provincial Key Laboratory of Modern Analytical Science and Separation TechnologyMinnan Normal UniversityZhangzhou 363000China

Although many plasmonic nanosenosrs have been established for the detection of mercury(Ⅱ)(Hg^(2+)),few of them is feasible for analyzing natural samples with very complex matrices because of insufficient method *** address this challenge,we propose an epitaxial and lattice-mismatch approach to the synthesis of a unique Au/Ag_(2)S dimeric nanostructure,which consists of an Au segment with excellent plasmonic characteristics,and a highly stable Ag_(2)S portion with minimum solubility product (K_(sp)(Ag_(2)S)=6.3×10^(-50)).The detection relies on the chemical conversion of Ag_(2)S to HgS when reacting with Hg^(2+),resulting in a red shift in the absorption band of the connecting Au *** concurrent color changes of the solution from gray purple to dark green and finally to navy correlate well with Hg^(2+)concentration,thus enables UV-vis quantitation and a naked-eye readout of the Hg^(2+)*** method exhibits superior selectivity towards Hg^(2+) over other interfering ions tested because Hg^(2+) is the only ion that can react with Ag_(2)S to form HgS with even smaller solubility product (K_(sp)(HgS)=4×10^(-53)).The detection limit of this method is 1.21μmol/L,calculated by the signal-to-noise of *** practicability of the method was verified by analyzing the Hg^(2+)in sewage water samples without sample pretreatment with satisfactory recoveries (93.1%-102.8%) and relative standard deviations (1.38%-2.89%).We believe this method holds great potential for on-the-spot detection of Hg^(2+) in environmental water samples with complex matrices.

关键词： Au/Ag_(2)S dimeric nanoparticles Mercury ion Colorimetric detection High selectivity

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Generation of multiphoton quantum states on silicon

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Light(science & Applications) 2019年第1期8卷 811-817页

作者： Ming Zhang Lan-Tian Feng Zhi-Yuan Zhou Yang Chen Hao Wu Ming Li Shi-Ming Gao Guo-Ping Guo Guang-Can Guo Dao-Xin Dai Xi-Feng Ren State key laboratory for Modern Optical Instrumentation Centre for Optical and Electromagnetic ResearchZhejiang Provincial Key Laboratory for Sensing TechnologiesCollege of Optical Science and EngineeringZhejiang UniversityZijingang CampusHangzhou 310058China Ningbo Research Institute Zhejiang UniversityNingbo 315100China key laboratory of Quantum Information CASUniversity of Science and Technology of ChinaHefeiAnhui 230026China Synergetic Innovation Center of Quantum Information&Quantum Physics University of Science and Technology of ChinaHefeiAnhui 230026China

Multiphoton quantum states play a critical role in emerging quantum technologies and greatly improve our fundamental understanding of the quantum *** photonics is well recognized as an attractive technology offering great promise for the generation of photonic quantum states with high-brightness,tunability,stability,and ***,we demonstrate the generation of multiphoton quantum states using a single-silicon nanophotonic *** detected four-photon rate reaches 0.34 Hz even with a low-pump power of 600μ*** multiphoton quantum state is also qualified with multiphoton quantum interference,as well as quantum state *** the generated four-photon states,the quantum interference visibilities are greater than 95%,and the fidelity is 0.78±***,such a multiphoton quantum source is fully compatible with the on-chip processes of quantum manipulation,as well as quantum detection,which is helpful for the realization of large-scale quantum photonic integrated circuits(QPICs)and shows great potential for research in the area of multiphoton quantum science.

关键词： quantum multiphoton realization

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Monitoring of time-resolved singlet oxygen luminescence at 1270 nm by an optical fiber detection system

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Journal of Innovative Optical Health sciences 2022年第6期15卷 68-77页

作者： Cheng Zhang Hongxin Lin Ying Hu Jian Sui Lisheng Lin Buhong Li key laboratory of Optoelectronic science and technology for Medicine of Ministry of Education fujian provincial key laboratory of Photonics technology fujian Normal University Fuzhou Fujian 350007P.R.China Department of Gastrointestinal Surgery fujian provincial Hospital Fuzhou Fujian 350013P.R.China

Singlet oxygen(^(1)O_(2))is the main cytotoxic substance in Type II photodynamic therapy(PDT).The luminescence of ^(1)O_(2) at 1270nm is extremely weak with a low quantum yield,making the direct detection of'O2 at 1270 nm very *** this study,a set of highly sensitive optical fiber detection system is built up to detect the luminescence of photosensitized ^(1)O_(2) We use this system to test the luminescence characteristics of ^(1)O_(2) in pig skin tissue ex vrivo and mouse auricle skin in *** experimental results show that the designed system can quantitatively detect photosensitized ^(1)O_(2) *** ^(1)O_(2) luminescence signal at 1270 nm is successfully detected in pig skin exr *** with RB in an aqueous solution,the lifetime of ^(1)O_(2) increases to 17.4±12pus in pig skin tissue ex *** on living mice suggest that an enhancement of ^(1)O_(2) intensity with the increase of the TMPyP *** the dose is 25 mg/kg,the vasoconstriction can reach more than 80%。The results of this study hold the potential application for clinical PDT dose monitoring using an optical fiber detection system.

关键词： Singlet oxygen photodynamic therapy optical fiber detection system vasoconstriction

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Deep learning-assisted common temperature measurement based on visible light imaging

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Chinese Physics B 2024年第8期33卷 230-236页

作者：朱佳仪何志民黄成曾峻林惠川陈福昌余超群李燕张永涛陈焕庭蒲继雄 College of Physics and Information Engineering Minnan Normal UniversityZhangzhou 363000China fujian provincial key laboratory of Light Propagation and Transformation College of Information Science&EngineeringHuaqiao UniversityXiamen 361021China

Real-time,contact-free temperature monitoring of low to medium range(30℃-150℃)has been extensively used in industry and agriculture,which is usually realized by costly infrared temperature detection *** paper proposes an alternative approach of extracting temperature information in real time from the visible light images of the monitoring target using a convolutional neural network(CNN).A mean-square error ofdetection using visible optical images by the ***,the CNN has a certain illuminance generalization ability capable of detection temperature information from the images which were collected under different illuminance and were not used for *** to the conventional machine learning algorithms mentioned in the recent literatures,this real-time,contact-free temperature measurement approach that does not require any further image processing operations facilitates temperature monitoring applications in the industrial and civil fields.

关键词： convolutional neural network visible light image temperature measurement low-to-medium-range temperatures

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Correlation of in vivo tumor response and singlet oxygen luminescence detection in mTHPC-mediated photodynamic therapy

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Journal of Innovative Optical Health sciences 2015年第1期8卷 106-112页

作者： Brian C.Wilson Michael S.Patterson Buhong Li Mark T.Jarvi Department of Medical Biophysics University of Toronto/University Health Network Toronto Ontario M5G 1L7Canada Juravinski Cancer Centre and McMaster University Hamilton Ontario L8V 5C2Canada MOE key laboratory of OptoElectronic science and technology for Medicine fujian provincial key laboratory for Photonics technology fujian Normal University FuzhouFujian 350007P.R.China

Excited-state singlet axygen(^(1)O_(2)),generated during photodynamic therapy(PDT),is believed to be the primary cytotoxic agent with a number of clinically approved *** relative concentration in cells or tissues can be measured directly through its near-infrared(NIR)luminescence emission,which has correlated well with in vitro cell and in triro normal skin treatment ***,its correlation with the response of tumor tiss1e in vito is examined,using the photosensitizer meso-tetralydroxyphenylchlorin(mTHPC)in an animal model comprising luciferase-and green fluorescent protein(GFP)-transduced gliosarcoma grown in a dorsal window *** change in the bioluminescence signal,imaged pre-treatment and at 2,5 and 9 d post treatment,was used as a quantitative measure of the tumor response,which was classified in individual tumors as"non","moderate"and"strong"in order to reduce the variance in the *** the bioluminescence-based response vs the^(1)O_(2)counts demonstrated clear correlation,indicating tha^(1)O_(2)luminescence provides a valid do-simetric technique for PDT in tumor tissue.

关键词： Photodynamice therapy singlet axygen lumninescence dosinetry bioluminescence

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Evaluation of fiber degree for fish muscle based on the edge feature attention net

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Food Bioscience 2022年第3期47卷 635-644页

作者： Junhua Yu Jinlin Zhu Bowen Yan Xidong Jiao Jianlian Huang Jianxin Zhao Hao Zhang Wei Chen Daming Fan State key laboratory of Food science and technology Jiangnan UniversityWuxi214122China key laboratory of Refrigeration and Conditioning Aquatic Products Processing Ministry of Agriculture and Rural AffairsXiamen361022China School of Food science and technology Jiangnan UniversityWuxi214122China fujian provincial key laboratory of Refrigeration and Conditioning Aquatic Products Processing Xiamen361022China fujian Anjoy Food Share Co.Ltd. Xiamen361022China

The fiber mouthfeel of fish muscle is a highly sought-after goal for surimi gel *** primary aim of research and development has been to quickly and accurately evaluate fiber degree for fish ***,based on the ResNet model,edge feature attentional mechanism was introduced to obtain the edge feature attention net (EFANet) to evaluate fiber degree for fish *** EFANet was trained and tested on a dataset,which was made by collecting microscopic pictures of fish samples with different degrees of *** with the three classic convolutional neural network (CNN) models,the EFANet emphasizes the learning of fiber texture information for fish muscle,reduces the effect of image color change,and significantly improves the detection *** average accuracy and specificity of the EFANet-50 on the testing dataset were 96.22% and 97.92%,respectively,which proved that it can effectively predict the fiber degree of fish muscle.

关键词： Fiber degree Convolutional neural network ResNet Attentional mechanism Color change

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Light absorption distribution of prostate tissue irradiated by diffusing light source

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Optoelectronics Letters 2015年第3期11卷 237-240页

作者：彭东青谢文明郭建唐嘉铭李志芳李晖 key laboratory of Optoelectronic science and technology for Medicine Ministry of Education of China Fujian Pro- vincial Key Laboratory of Photonic Technology College of Photonic and Electronic Engineering Fujian Normal Uni- versity Fuzhou 350007 China School of science Jimei University Xiamen 361021 China School of Information science and Engineering Fujian University of Technology Fuzhou 350118 China

Determination of light absorption distribution in the prostate tissue irradiated by diffusing light source is important for the treatment *** this paper,a three-dimensional(3D)optical model of human prostate is developed,and the light absorption distribution in the prostate tissue is estimated by Monte Carlo simulation *** distribution patterns including 3D distributions in the tissue model irradiated by two diffusing light sources are obtained and ***,the impacts of length and energy of cylinder diffusing light source on the irradiance volume are *** results will be significant for the nondestructive qualitative assessments of photodosimetry in biomedical phototherapy.

关键词： electromagnetic wave absorption Intelligent systems Light absorption Light sources Monte Carlo methods Urology

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A high-precision system of fiber Bragg grating temperature sensing demodulation based on light power detection

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Optoelectronics Letters 2022年第8期18卷 461-467页

作者： HUANG Shuyan HU Xiaohua ZHANG Hao CHEN Weijuan HUANG Youping FAN Mengyi Department of Electronic Information science Fujian Jiangxia UniversityFuzhou 350108China University of Chinese Academy of sciences Beijing 100059China fujian provincial key laboratory for Advanced Micro-nano Photonics technology and Devices Quanzhou Normal UniversityQuanzhou 362000China

A system of fiber Bragg grating(FBG)temperature sensing demodulation based on light power detection is proposed in this *** with the traditional demodulation method based on wavelength scanning,light power detection is more direct and avoids the use of ***,the light power in the system is converted into the electrical signal by the receiver optical subassembly(ROSA)and converted to the digital *** micro controller unit(MCU)processes the digital signal to realize the real-time temperature monitoring,which avoids the use of optical power meter(OPM).With the advantages of simple structure and low cost,the system is portable and *** experimental results show that the linearity coefficients R-square between light power and the sampling voltage are 0.99908 and 0.99893 in the temperature range from 10°C to 85°C,*** to the results,the proved sensor has a repeatability error of 1%,a linearity error of 1.35%,and a hysteresis error of 0.7%,which indicates that the system is of high stability and high *** experimental results are consistent with the theory,which verifies the system’s feasibility.

关键词： system power fiber

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Cloud-based smartphone-assisted chemiluminescent assay for rapid screening of electroactive bacteria

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science China(Technological sciences) 2023年第3期66卷 743-750页

作者： WEN JunLin HE DaiGui LUO SongQing ZHOU ShunGui YUAN Yong Guangdong key laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China College of Artificial Intelligence Guangdong Mechanical&Electrical PolytechnicGuangzhou 510550China fujian provincial key laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China

Electroactive bacteria(EAB)can transfer electrons to exocellular solid acceptors and have widespread applications in the fields of pollutant degradation,biosynthesis,and hydrogen *** EAB screening methods can precisely measure the bacterial extracellular electron transfer ability,but they suffer from time-consuming and labor-intensive *** chemiluminescence technique is effective for the rapid detection of hemoglobin but has not been applied for EAB ***,we utilized a chemiluminescent assay to identify EAB through a multiheme c-type cytochrome(c-Cyt)triggered chemiluminescent *** multiheme c-Cyts-triggered chemiluminescence was conveniently determined by taking photographs with commercial smartphones and cloud-based *** acquired image signal shows a significant and linear relationship with the bacterial *** results of the chemiluminescence intensity triggered by different bacterial species with the proposed method are strongly associated with those of the microplate reading method(Pearson’s r of 0.9795;Pscience,and bioenergy.

关键词： electroactive bacteria c-type cytochrome chemiluminescence cloud computing smartphone

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Supercritical fluid-assisted fabrication of C-doped Co_(3)O_(4) nanoparticles based on polymer-coated metal salt nanoreactors for efficient enzyme-mimicking and glucose sensor properties

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Nano Research 2023年第5期16卷 7431-7442页

作者： Ze-Wen Kang Jun-Yu Zhang Ze-Zhen Li Ranjith Kumar Kankala Shi-Bin Wang Ai-Zheng Chen Institute of Biomaterials and Tissue Engineering Huaqiao UniversityXiamen 361021China fujian provincial key laboratory of Biochemical technology(Huaqiao University) Xiamen 361021China Instrumental Analysis Center Laboratory and Equipment Management DepartmentHuaqiao UniversityXiamen 361021China

Nanomaterials doped with non-metallic C have attracted tremendous attention as potential nano-artificial enzymes due to their ability to change the energy band structure to improve their intrinsic ***,we report a green,facile,efficient,fast strategy to access high-performance nanozymes via supercritical CO_(2)fluid technology-fabricated polymer nanoreactor of poly-(methyl vinyl ether-co-maleic anhydride)(PVM/MA)coated Co(NO_(3))_(2)into C-doped Co_(3)O_(4)(C-Co_(3)O_(4))nanozyme by a onestep calcination *** PVM/MA to C doping into Co_(3)O_(4)shortens the entire lattice constant of the crystal structure,and the overall valence band energy level below the Fermi level shifts toward the lower energy *** as-prepared CCo_(3)O_(4)demonstrated significant peroxidase-like catalytic activity,significantly greater than the undoped Co_(3)O_(4)nanoparticle *** following density functional theory(DFT)calculations revealed that the doped nano-enzyme catalytic site displayed a unique electronic structure,altering the material surface with more electrons to fill the anti-bond of the two molecular orbitals,significantly improving the peroxidase-like enzyme catalytic and glucose sensor *** resultant enzymatic glucose sensing in a linear range of 0.1–0.6 mM with a detection limit of 3.86μM is in line with standard Michaelis–Menten ***,this work demonstrates that converting polymers into nanozymes of C-doped form by supercritical CO_(2)fluid technology in a step is an effective strategy for constructing high-performance glucose sensor *** cost-effective,reliable,precise system offers the potential for rapid analyte detection,facilitating its application in a variety of fields.

关键词： supercritical fluid poly-(methyl vinyl ether-co-maleic anhydride)(PVM/MA) C-doped Co_(3)O_(4) nanozymes density functional theory(DFT)calculation

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