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Crosstalk-free multichannel sensor based on a dual-Sagnac interferometer interrogated by microwave photonic filter

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Optoelectronics Letters 2025年

作者： ZHANG Ailing WANG Bo ZHANG Yongfu chang pengxiang WANG Minghe LIN Rui Engineering Research Center of Optoelectronic Devices & Communication Technology， Ministry of Education， Tianjin Key Laboratory of Film Electronic and Communication Devices， School of Electrical and Electronic Engineering， Tianjin University of Technology

A crosstalk-free multichannel sensor based on a dual-Sagnac interferometer interrogated by microwave photonic filter (MPF) is demonstrated theoretically and experimentally in this paper. The dual-Sagnac interferometer is taken as the sensing element as well as an optical spectrum slicer to implement a dual-passband MPF. Experimental results show that the proposed multichannel sensor is crosstalk-free， and the temperature sensitivity of each channel is -0.9884 MHz/℃ and -1.9302 MHz/℃， respectively. The sensing interrogation system has good linearity and stability and it is suitable for application scenarios where multiple points of temperature are required to monitor simultaneously.

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The Influence of Neutral Beam Injection on the Heating and Current Drive with Electron Cyclotron Wave on EAST

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Plasma Science and Technology 2016年第11期18卷 1064-1068页

作者： chang pengxiang WU Bin WANG Jinfang LI Yingying WANG Xiaoguang XU Handong WANG Xiaojie LIU Yong ZHAO Hailin HAO Baolong YANG Zhen ZHENG Ting HU Chundong Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China Center for Fusion Energy Science and Technology Chinese Academy of Engineering Physics Mianyang 621900 China

Both neutral beam injection （NBI） and electron cyclotron resonance heating （ECRH） have been applied on the Experimental Advanced Superconducting Tokamak （EAST） in the 2015 campaign. In order to achieve more effective heating and current drive, the effects of NBI on the heating and current drive with electron cyclotron wave （ECW） are analyzed utilizing the code TORAY and experimental data in the shot #54411 and #54417. According to the experimental and simulated results, for the heating with ECW, NBI can improve the heating efficiency-and move the power deposition place towards the inside of the plasma. On the other hand, for the electron cyclotron current drive （ECCD）, NBI can also improve the efficiency of ECCD and move the place of ECCD inward. These results will be valuable for the center heating, the achievement of fully non-inductive current drive operation and the suppression of magnetohydrodynamic （MHD） instabilities with ECW on EAST or ITER with many auxiliary heating methods.

关键词： ECRH NBI EAST TORAY

Liquid crystal-amplified optofluidic biosensor for ultra-highly sensitive and stable protein assay

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PhotoniX 2021年第1期2卷 170-185页

作者： Ziyihui Wang Yize Liu Chaoyang Gong Zhiyi Yuan Liang Shen pengxiang chang Kun Liu Tianhua Xu Junfeng Jiang Yu-Cheng Chen Tiegen Liu School of Precision Instrument and Opto-Electronics Engineering Tianjin UniversityTianjin 300072China School of Electrical and Electronics Engineering Nanyang Technological UniversitySingapore 639798Singapore School of Engineering University of WarwickCoventry CV47ALUK.

Protein assays show great importance in medical research and disease *** crystals(LCs),as a branch of sensitive materials,offer promising applicability in the field of ***,we developed an ultrasensitive biosensor for the detection of low-concentration protein molecules,employing LC-amplified optofluidic *** this design,the orientation of LCs was disturbed by immobilized protein molecules through the reduction of the vertical anchoring force from the alignment layer.A biosensing platform based on the whispering-gallery mode(WGM)from the LC-amplified optofluidic resonator was developed and explored,in which the spectral wavelength shift was monitored as the sensing *** microbubble structure provided a stable and reliable WGM resonator with a high Q factor for *** is demonstrated that the wall thickness of the microbubble played a key role in enhancing the sensitivity of the LC-amplified WGM *** is also found that protein molecules coated on the internal surface of microbubble led to their interactions with laser beams and the orientation transition of *** effects amplified the target information and triggered a sensitive wavelength shift in WGM spectra.A detection limit of 1 fM for bovine serum albumin(BSA)was achieved to demonstrate the high-sensitivity of our sensing platform in protein *** to the detection using a conventional polarized optical microscope(POM),the sensitivity was improved by seven orders of ***,multiple types of proteins and specific biosensing were also investigated to verify the potential of LC-amplified optofluidic resonators in the biomolecular *** studies indicate that LC-amplified optofluidic resonators offer a new solution for the ultrasensitive real-time biosensing and the characterization of biomolecular interactions.

关键词： Liquid crystal Biosensor Protein assay Whispering-gallery mode Microfluidic

Carbon nanotube/silicon heterojunctions for photovoltaic applications

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Nano Materials Science 2019年第3期1卷 156-172页

作者： Xiangang Hu pengxiang Hou chang Liu Huiming Cheng Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei230026China Tsinghua-Berkeley Shenzhen Institute Tsinghua UniversityShenzhen518055China

Photovoltaic devices have rapidly developed in recent years as they seek to address the ever-increasing energy requirements and environmental *** to their simple structure and easy,low-temperature fabrication,heterojunctions of carbon nanotube(CNT)films and silicon(Si)have been used in solar cells,photodetectors and optoelectronic gas *** progress has been made on the development of high-performance CNT/Si heterojunction devices,in particular,CNT/Si solar ***,we give a comprehensive overview of state-of-theart CNT/Si heterojunction *** effects of the structure of the CNTs,the interface layer and the silicon structure on the performance of CNT/Si solar cells are *** addition,potential ways to further improve the performance of such photovoltaic devices are ***,the key challenges and developing trends in CNT/Si heterojunction photovoltaic devices are discussed.

关键词： Carbon nanotube Heterojunction Solar cell Photodetector Gas sensor

Lifetime Evaluating and the Effects of Operation Conditions on Automotive Fuel Cells

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Chinese Journal of Mechanical Engineering 2010年第1期23卷 66-71页

作者： PEI Pucheng YUAN Xing LI Pengcheng CHAO pengxiang chang Qianfei State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China School of Transportation Science and Engineering Beihang University Beijing 100191 China

Lifetime isone of the important indicators of automotive proton exchange membrane fuel cells. People used to evaluate the lifetime of vehicular fuel cells by laboratory tests or road tests that usually take thousands hours even years. In order to achieve a rapid evaluation technique and to seek lifetime extension methods, a lifetime calculation formation was drawn out in consideration of the vehicle driving cycle and the working condition factors. Bench experiments were individually carried out on two fuel-cell stacks same as ones applied on vehicle, and the performance decay rates of the two stacks were obtained under four operation conditions of changing load cycle, start-stop cycle, idling and heavy load. As a result, the predicted lifetimes rather conform to the actual running status in road test. And the research on the fuel cell performance decay rates under different load conditions was also done. Consequently, an unexpected finding was discovered that operating under micro-current has an effect on recovering fuel cell performance. The vehicle fuel cell rapid assessment method only requires four laboratory tests of driving cycle, load cycle, idle operating conditions and heavy load conditions, and the whole process merely lasts less than 250 h. These experimental results can be used to predict the vehicular fuel cell lifetimes on various utility models or driving cycles, therefore to optimize the application model to prolong the fuel cell lifetime. Actually in the experiment, it has already been proved successfully that the fuel cell lifetime could be extended from 1 100 h to 2 600 h by optimizing operating mode. The quick evaluation method is helpful to develop extended life fuel cell and to deplete fuel cell for a longer time.

关键词： Proton exchange membrane fuel cell fuel cell durability lifetime evaluating method operation conditions melioration.

Carbon nanotubes prepared by anodic aluminum oxide template method

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Chinese Science Bulletin 2012年第2期57卷 187-204页

作者： HOU pengxiang LIU chang SHI Chao CHENG HuiMing Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

One of the most unique structural characteristics of carbon nanotubes(CNTs) differentiating from other carbon materials is their hollow nanochannles,which can be utilized for encapsulating and loading foreign *** anodic aluminum oxide(AAO) template technique enables the diameter,length,and cap structure control of the replicated CNTs,and thus shows advantages in pore structure control over the traditional CNT growth *** review details the synthesis of CNTs with tunable diameter,length,wall thickness,and crystalline by using the AAO template *** doping of heteroatoms and filling of foreign matters into AAO-CNTs are also ***,the main challenges and developing trends of the AAO template method are discussed.

关键词：阳极氧化铝碳纳米管模板法结构控制多孔氧化铝模板技术发展趋势 AAO

Bulk growth and separation of single-walled carbon nanotubes from rhenium catalyst

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Nano Research 2022年第7期15卷 5775-5780页

作者： Chen Ma Yumin Liu Lili Zhang Liu Qian Yiming Zhao Ying Tian Qianru Wu Dong Li Nan Zhao Xueting Zhang Liantao Xin Huaping Liu pengxiang Hou chang Liu Maoshuai He Jin Zhang State Key Laboratory of Eco-Chemical Engineering Ministry of EducationTaishan Scholar Advantage and Characteristic Discipline Team of EcoChemical Process and TechnologyCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China School of Science Dalian Maritime UniversityDalian 116026China

Bulk synthesis of single-walled carbon nanotubes(SWNTs)using solid catalyst has been challenging,despite of recent breakthrough in the chirality-specific growth on the flat substrate *** this work,we propose a porous magnesia support rhenium catalyst for bulk synthesis of *** is found that the well-dispersed catalyst with a high melting point and the optimal chemical vapor deposition reaction conditions account for the growth of *** characterizations reveal the produced SWNTs are dominant in(n,n−1)and(n,n−2)***,by using a multicolumn chromatography post-growth separation method,SWNTs with three defined diameter ranges were *** work guides the design of porous oxide supported catalyst for bulk synthesis and diameter-dependent sorting of SWNTs,which will ultimately help harness the extraordinary properties of SWNTs.

关键词： single-walled carbon nanotube rhenium catalyst bulk growth gel chromatography diameter separation

气相刻蚀选择性制备单一导电属性单壁碳纳米管

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科学通报 2014年第33期59卷 3280-3292页

作者：侯鹏翔刘畅成会明中国科学院金属研究所沈阳材料科学国家(联合)实验室沈阳110016

单一导电属性单壁碳纳米管的控制制备是目前碳纳米管研究领域的重点和难点,也是制约其在微纳电子器件中应用的瓶颈.近年来,研究者致力于发展获得单一导电属性单壁碳纳米管的方法,并取得了较大进展.其中,气相选择性刻蚀方法因具有工艺简... 详细信息

单一导电属性单壁碳纳米管的控制制备是目前碳纳米管研究领域的重点和难点,也是制约其在微纳电子器件中应用的瓶颈.近年来,研究者致力于发展获得单一导电属性单壁碳纳米管的方法,并取得了较大进展.其中,气相选择性刻蚀方法因具有工艺简单、效果显著、易规模化等特点而备受关注.本文简要介绍了气相选择性刻蚀方法制备单一导电属性碳纳米管的原理及特点,并综述近年来原位生长-刻蚀制备研究所取得的主要进展,最后展望其发展趋势.

关键词：单壁碳纳米管金属性半导体性气相刻蚀

Carbon nanotubes prepared by anodic aluminum oxide template method

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Science Bulletin 2012年第Z1期 187-204页

作者： HOU pengxiang,LIU chang*,SHI Chao & CHENG HuiMing Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

关键词： carbon nanotubes(CNTs) anodic aluminum oxide(AAO) template method controllability