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Ultrasensitive detection of endocrine disruptors via superfine plasmonic spectral combs

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Light(Science & Applications) 2021年第10期10卷 1849-1862页

作者： Lanhua Liu Xuejun Zhang Qian Zhu Kaiwei Li Yun Lu Xiaohong Zhou tuan guo State Key Joint Laboratory of ESPC School of EnvironmentTsinghua UniversityBeijing 100084China Institute of Photonics Technology Jinan UniversityGuangzhou 510632China

The apparent increase in hormone-induced cancers and disorders of the reproductive tract has led to a growing demand for new technologies capable of detecting endocrine ***,a long-lasting challenge unaddressed is how to achieve ultrahigh sensitive,continuous,and in situ measurement with a portable device for infield and remote environmental *** we demonstrate a simple-to-implement plasmonic optical fiber biosensing platform to achieve an improved light–matter interaction and advanced surface chemistry for ultrasensitive detection of endocrine *** platform is based on a gold-coated highly tilted fiber Bragg grating that excites high-density narrow cladding mode spectral combs that overlap with the broad absorption of the surface plasmon for high accuracy interrogation,hence enabling the ultrasensitive monitoring of refractive index changes at the fiber *** the use of estrogen receptors as the model,we design an estradiol–streptavidin conjugate with the assistance of molecular dynamics,converting the specific recognition of environmental estrogens(EEs)by estrogen receptor into surface-based affinity bioassay for *** ultrasensitive platform with conjugate-induced amplification biosensing approach enables the subsequent detection for EEs down to 1.5×10−3 ng ml−1 estradiol equivalent concentration level,which is one order lower than the defined maximal E2 level in drinking water set by the Japanese *** capability to detect EEs down to nanogram per liter level is the lowest limit of detection for any estrogen receptor-based detection reported thus *** compact size,flexible shape,and remote operation capability open the way for detecting other endocrine disruptors with ultrahigh sensitivity and in various hard-toreach spaces,thereby having the potential to revolutionize environment and health monitoring.

关键词： fiber spectral conjugate

High-sensitive and temperature-self-calibrated tilted fiber grating biological sensing probe

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Chinese Science Bulletin 2013年第21期58卷 2611-2615页

作者： LIU Fu guo tuan LIU Jianguo ZHU XiaoYang LIU Yu GUAN BaiOu ALBERT Jacques Institute of Photonics Technology Jinan University Institute of Semiconductors Chinese Academy of Sciences Department of Biochemistry Medical School Jinan University Department of Electronics Carleton University

High sensitivity biological sample measurement has been achieved by using a 10° tilted fiber Bragg grating sensing probe. Human acute leukemia cells with different intracellular densities were clearly discriminated by identifying their slight refraction index (RI) perturbations in the range from 1.3342 to 1.3344, combining with a temperature self-calibration property. We studied the relationship between the intracellular density of cells (S50 and S60) and their RIs, the experimental results provide a potential way to verify the hypothesis for "density alteration in non-physiological cells (DANCE)".

关键词：传感探头光纤光栅高灵敏度自校准生物温度细胞密度白血病细胞

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Operando optical fiber monitoring of nanoscale and fast temperature changes during photo-electrocatalytic reactions

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Light(Science & Applications) 2022年第9期11卷 2086-2097页

作者： ZHI LI YONGGUANG XIAO FU LIU XIANGYU YAN DAOTONG YOU KAIWEI LI LIXI ZENG MINGSHAN ZHU GAOZHI XIAO JACQUES ALBERT tuan guo Guangdong Key Laboratory of Environmental Pollution and Health School of EnvironmentJinan UniversityGuangzhou 511443China Guangdong Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhouGuangdong 511443China Department of Electronics Carleton UniversityOttawa K1S 5B6Canada Advanced Electronics and Photonics Research Center National Research Council of CanadaOttawa K1A 0R6Canada Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China

In situ and continuous monitoring of thermal effects is essential for understanding photo-induced catalytic processes at catalyst's ***,existing techniques are largely unable to capture the rapidly changing temperatures occurring in sub-μm layers at liquid-solid interfaces exposed to *** address this,a sensing system based on a gold-coated conventional single-mode optical fiber with a tilted fiber Bragg grating inscribed in the fiber core is proposed and *** spectral transmission from these devices is made up of a dense comb of narrowband resonances that can differentiate between localized temperatures rapid changes at the catalyst's surface and those of the *** using the gold coating of the fiber as an electrode in an electrochemical reactor and exposing it to light,thermal effects in photo-induced catalysis at the interface can be decoded with a temperature resolution of 0.1℃and a temporal resolution of 0.1 sec,without perturbing the catalytic operation that is measured *** a demonstration,stable and reproducible correlations between the light-to-heat conversion and catalytic activities over time were measured for two different catalysis processes(linear and nonlinear).These kinds of sensing applications are ideally suited to the fundamental qualities of optical fiber sensors,such as their compact size,flexible shape,and remote measurement capability,thereby opening the way for various thermal monitoring in hard-to-reach spaces and rapid catalytic reaction processes.

关键词： catalysis catalyst thereby

In situ plasmonic optical fiber detection of the state of charge of supercapacitors for renewable energy storage

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Light(Science & Applications) 2018年第1期7卷 729-739页

作者： Jiajie Lao Peng Sun Fu Liu Xuejun Zhang Chuanxi Zhao Wenjie Mai tuan guo Gaozhi Xiao Jacques Albert Guangdong Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhouGuangdong 510632People’s Republic of China Department of Physics Siyuan LaboratoryGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsJinan UniversityGuangzhouGuangdong 510632People’s Republic of China Department of Electronics Carleton UniversityOttawa K1S 5B6Canada Advanced Electronics and Photonics Research Center National Research Council of CanadaOttawa K1A 0R6Canada

In situ and continuous monitoring of electrochemical activity is key to understanding and evaluating the operation mechanism and efficiency of energy storage ***,this task remains *** example,the present methods are not capable of providing the real-time information about the state of charge(SOC)of the energy storage devices while in *** address this,a novel approach based on an electrochemical surface plasmon resonance(SPR)optical fiber sensor is proposed *** approach offers the capability of in situ comprehensive monitoring of the electrochemical activity(the electrode potential and the SOC)of supercapacitors(used as an example).The sensor adopted is a tilted fiber Bragg grating imprinted in a commercial single-mode fiber and coated with a nanoscale gold film for high-efficiency SPR *** conventional“bulk”detection methods for electrode activity,our approach targets the“localized”(sub-μm-scale)charge state of the ions adjacent to the electrode interface of supercapacitors by monitoring the properties of the SPR wave on the fiber sensor surface located adjacent to the electrode.A stable and reproducible correlation between the real-time charge–discharge cycles of the supercapacitors and the optical transmission of the optical fiber has been ***,the method proposed is inherently immune to temperature cross-talk because of the presence of environmentally insensitive reference features in the optical transmission spectrum of the ***,this particular application is ideally suited to the fundamental qualities of optical fiber sensors,such as their compact size,flexible shape,and remote operation capability,thereby opening the way for other opportunities for electrochemical monitoring in various hard-to-reach spaces and remote environments.

关键词： fiber optical charge

Operando monitoring of dendrite formation in lithium metal batteries via ultrasensitive tilted fiber Bragg grating sensors

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Light(Science & Applications) 2024年第1期13卷 153-166页

作者： Xile Han Hai Zhong Kaiwei Li Xiaobin Xue Wen Wu Nan Hu Xihong Lu Jiaqiang Huang Gaozhi Xiao Yaohua Mai tuan guo Institute of Photonics Technology Jinan UniversityGuangzhou 510632China Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632China Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchun 130022China The Key Lab of Low-Carbon Chemistry&Energy Conservation of Guangdong Province School of ChemistrySun Yat-Sen UniversityGuangzhou 510275China Sustainable Energy and Environment Thrust The Hong Kong University of Science and Technology(Guangzhou)NanshaGuangzhouGuangdong 511400China Advanced Electronics and Photonics Research Centre National Research Council of CanadaOttawa K1A OR6Canada

Lithium(Li)dendrite growth significantly deteriorates the performance and shortens the operation life of lithium metal *** the intricate dynamics of surface localized and rapid mass transport at the electrolyte–electrode interface of lithium metal is essential for the understanding of the dendrite growth process,and the evaluation of the solutions mitigating the dendrite growth *** we demonstrate an approach based on an ultrasensitive tilted fiber Bragg grating(TFBG)sensor which is inserted close to the electrode surface in a working lithium metal battery,without disturbing its *** to the superfine optical resonances of the TFBG,in situ and rapid monitoring of mass transport kinetics and lithium dendrite growth at the nanoscale interface of lithium anodes have been *** correlations between the performance of different natural/artificial solid electrolyte interphases(SEIs)and the time-resolved optical responses have been observed and quantified,enabling us to link the nanoscale ion and SEI behavior with the macroscopic battery *** new operando tool will provide additional capabilities for parametrization of the batteries’electrochemistry and help identify the optimal interphases of lithium metal batteries to enhance battery performance and its safety.

关键词： battery lithium electrolyte

In situ plasmonic & electrochemical fiber-optic sensor for multi-metal-ions detection

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Science China(Information Sciences) 2024年第1期67卷 292-302页

作者： Xiaoling PENG Zhiyong YANG Bo PENG Zhi LI Zhicong REN Xicheng WANG Jiahai LI Zhencheng LI Liang CHEN Daotong YOU Kaiwei LI Jianqing LI tuan guo Institute of Photonics Technology Jinan University School of Computer Science and Engineering Macau University of Science and Technology Institute for Environmental and Climate Research Jinan University Key Laboratory of Bionic Engineering of Ministry of Education Jilin University

High precision and high throughput detection of heavy metal ions is essential for water quality monitoring and ***,we propose a plasmonic & electrochemical dual-mode fiber sensing probe for label-free and real-time detection of multiple ions(Pb2+and Cu2+as examples).This sensor comprises a multimode fiber-single mode fiber reflection probe,the outer surface of which is coated with a gold nanofilm to excite the surface plasmon resonance(SPR) optically and simultaneously serves as an electrochemical working *** traditional electrochemical detection,the enrichment of ions cannot be detected in ***,by utilizing the plasmonic & electrochemical dual-mode detection method,various kinds of metal ions can be deposited onto the gold nanofilm and selectively oxidized during forward potential scanning,and the entire electrochemical process can be monitored by SPR *** experimentally demonstrate that the sensor can simultaneously detect Pb2+and Cu2+in a mixed solution in real-time,providing a linear response over the ion concentration range from 10-12to 10-7M and offering an excellent detection limit(1.69×10-14–5.49×10-13M).The proposed dual-mode fiber sensor has the benefits of remote sensing,compact footprint,and cost-effectiveness and shows excellent potential for water quality risk management in difficult-to-reach environments.

关键词： optical fiber sensor surface plasmon resonance electrochemical measurement ions detection water pollution

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Low-Frequency Vibration Measurement by a Dual-Frequency DBR Fiber Laser

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Photonic Sensors 2017年第3期7卷 206-210页

作者： Bing ZHANG Linghao CHENG Yizhi LIANG Long JIN tuan guo Bai-Ou GUAN Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics Technology Jinan University Guangzhou 510632 China

A dual-frequency distributed Bragg reflector （DBR） fiber laser based sensor is demonstrated for low-frequency vibration measurement through the Doppler effect. The response of the proposed sensor is quite linear and is much higher than that of a conventional accelerometer. The proposed sensor can work down to 1 Hz with high sensitivity. Therefore, the proposed sensor is very efficient in low-frequency vibration measurement.

关键词： Fiber laser sensors Doppler effect vibration measurement

Light intensity-referred and temperature-insensitive fiber Bragg grating dynamic pressure sensor

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Frontiers of Optoelectronics 2008年第Z1期1卷 113-118页

作者： tuan guo Qida ZHAO Lihui LIU Guiling HUANG Lifang XUE guoyu LI Bo LIU Weigang ZHANG Guiyun KAI Shuzhong YUAN Xiaoyi DONG Institute of Modern Optics Nankai University

Temperature-insensitive fiber Bragg grating(FBG) dynamic pressure sensing based on reflection spectrum bandwidth modulation and differential optical power detection is proposed and experimentally demonstrated. A special double-hole cantilever beam is designed to induce linear strain-gradient distribution along the sensing FBG, resulting in FBG reflection spectrum symmetrical broadening and optical power *** on the theory of optical waveguide and material mechanics, the causation of FBG spectrum broadening under the linear strain-gradient is analyzed, and the corresponding force-to-bandwidth broadening relation and force-to-optical power relation are formulized. FBG spectrum bandwidth and reflection optical power linearly change with applied pressure and both of them are insensitive to spatially uniform temperature *** a temperature range from-10°C to 80°C, the measured pressure fluctuates less than 1.8% F.S.(120 k Pa) without any temperature compensation. The system acquisition time is up to about 80 Hz for dynamic pressure measurement.

关键词： guided wave and fiber optics fiber sensing fiber Bragg grating (FBG) dynamic pressure sensing bandwidth modulation optical power detection

Superfine multiresonant fiber grating sensors assisted with silica capillaries

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Photonics Research 2024年第11期12卷 2488-2494页

作者： KAIWEI LI YONGGUANG XIAO FU LIU ZHIYONG YANG XIANGYU YAN ZHAOHUI LI tuan guo GAOZHI GEORGE XIAO JACQUES ALBERT Key Laboratory of Bionic Engineering (Ministry of Education) Jilin University Institute of Photonics Technology Jinan University School of Electrical and Information Technology Sun Yat-sen University Department of Electronics Carleton University National Research Council Canada

We propose and demonstrate a superfine multiresonant fiber grating sensor characterized by superior spectral resolution and enhanced sensing capabilities. This sensor can be easily constructed by inserting a tilted fiber Bragg grating(TFBG) probe into a silica capillary filled with a refractive index(RI) matching oil. As the fiber cladding,the RI-matching oil, and the capillary all have the same RI, the cladding modes excited by the TFBG can extend into the RI-matching oil and capillary, facilitating surface sensing outside the capillary. Our study shows that the number of cladding modes increases, and the resonance spectrum becomes denser as the outer diameter of the capillary gets larger. As a result, the detection accuracy of RI based on mode cutoff wavelength identification can be improved. Particularly, with a capillary diameter of 1 mm, the heightened spectral density enhances refractometric accuracy by nearly an order of magnitude compared to the intrinsic TFBG. The superfine multiresonant fiber grating sensor proposed here is flexible in configuration and easy to fabricate, providing a new strategy for developing new fiber sensing devices. ? 2024 Chinese Laser Press

关键词： Effective refractive index Fiber Bragg gratings Fiber optic sensors Microstructured fibers Multicore fibers Multimode fibers