Article
Engineering, Electrical & Electronic
Tianyu Yang, Weixiang Yuan, Yue Feng, Chi Liu, Tao Shen
Summary: The detection of ultra-low concentration of Cd2+ is crucial for human health protection and ecological environment stability. Therefore, an MZI fiber optic sensor based on α-Fe2O3@MoS2 nanocomposite functionalization is proposed. The optimal parameters of the sensor, including the lengths of no-core optical fiber (NCF) and few mode optical fiber (FMF), are determined through simulation. Using the functional group functionalization method, the α-Fe2O3@MoS2 nanocomposites are tightly bonded to the fiber surface. Experimental results demonstrate that the designed fiber sensor can achieve ultra-low trace detection of Cd2+ with high sensitivity, selectivity, stability, and responsiveness, making it applicable for water environment Cd2+ detection.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Electrical & Electronic
Nguyen La Ngoc Tran, Bach Thang Phan, Hanh Kieu Thi Ta, Tran Thi Kim Chi, Bui Thi Thu Hien, Nguyen Tran Truc Phuong, Chi Cuong Nguyen, Tan Le Hoang Doan, Nhu Hoa Thi Tran
Summary: This study successfully synthesized and utilized Au NPs/IRMOF-3 material for Raman signal enhancement. By combining localized surface plasmon resonance and porous structure, the nanosensor showed high sensitivity and stability.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
Bohong Zhang, Hanok Tekle, Ronald J. O'Malley, Jeffrey D. Smith, Rex E. Gerald, Jie Huang
Summary: This study presents the first in situ high-temperature fiber-optic Raman probe capable of studying the structure of glass and slag samples at temperatures up to 1400 degrees C. By integrating a customized external telescope into a portable fiber-optic Raman probe, the optical working distance was extended to enable high-temperature operation. The probe successfully collected and analyzed Raman spectra at both room temperature and high temperatures, and a deconvolution algorithm was used to identify molecular structure components. This method holds great potential for applications in materials development, composition and structure monitoring, chemical identification, and process monitoring in industrial production.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Marianne Stely Peixoto e Silva, Thales Henrique Castro de Barros, Henrique Patriota Alves, Jehan Fonseca do Nascimento, Joaquim Ferreira Martins Filho
Summary: Distributed fiber optic temperature sensor based on spontaneous Raman scattering is experimental evaluated over a wide range of temperatures, providing accurate values and fine resolution in temperature measurement.
IEEE SENSORS JOURNAL
(2021)
Article
Physics, Applied
Xuemei Jin, Dongmei Pan, Jingshun Pan, Xuguang Huang
Summary: This paper proposes a novel optical fiber sensor for highly sensitive Hg2+ detection based on the Mach-Zehnder interference (MZI) structure and thiophene-chitosan hydrogel (TCH). The sensor achieved a detection sensitivity of 1.008 x 10(11) mol l(-1) for Hg2+ and a detection limit of 5 x 10(-13) mol l(-1) through theoretical derivation and experimental verification. It also showed performance stability within 24 hours of concentration measurement, with an average standard deviation of 3.2 x 10(-13) mol l(-1) within an hour of observation. Additionally, the sensor has the advantages of specificity, simple preparation, and low cost, making it suitable for monitoring the concentration of Hg2+ in complex water systems.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Analytical
Weijia Bao, Fengyi Chen, Huailei Lai, Shen Liu, Yiping Wang
Summary: The study introduces an all fiber-optic flexible humidity sensor for wearable breath monitoring, showing fast response and high flexibility. The sensor can recognize different breathing patterns and extract breathing frequency. It exhibits excellent reproducibility, high sensitivity, and self-compensation capability.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Lidong Lu, Yishan Wang, Ce Liang, Jiaming Fan, Xingchen Su, Minnan Huang
Summary: A novel distributed optical fiber temperature sensor based on Raman anti-Stokes scattering light is proposed in this paper. It utilizes the relationship between temperature and power of back-scattered Raman anti-Stokes light to obtain the temperature demodulation algorithm. A new temperature calibration method is also proposed for accurate temperature measurement. The experimental results demonstrate the potential of this system for practical engineering applications and its advantage of avoiding the walk-off effect in commonly used temperature demodulation schemes.
APPLIED SCIENCES-BASEL
(2023)
Article
Biochemical Research Methods
Krishna Kumari Swain, Sunil Bhand
Summary: A colorimetric paper-based enzyme-coupled antimony tin oxide nanoparticle (ATONP) nanobiosensor has been developed for selective detection of Cd2+ ions in clams and mussels, showing high selectivity and sensitivity.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Ruiqin Gu, Yunong Zhao, Huibing Fu, Qing Huang, Long Li, Zhixiang Hu, Licheng Zhou, Bingbing Chen, Huan Liu
Summary: The use of metal oxide semiconductor nanocrystals in chemically modified electrodes has shown great potential for the rapid and low-cost detection of heavy metal ions. However, the sensitivity and selectivity for cadmium ion (Cd2+) detection still poses a challenge. This study proposes and demonstrates an ultra-sensitive and selective Cd2+ detection method based on WO3-nanocrystal-modified electrodes. The WO3-nanocrystal-modified electrodes exhibit a remarkable signal transduction capability and show linear current output signals in response to the logarithm of the Cd2+ concentration. The selectivity mechanism is attributed to the high adsorption energy of cadmium on WO3 compared to other heavy metal ions. The use of WO3 in Cd2+-selective electrodes holds potential for portable ion-detection applications.
Review
Optics
Ignazio Floris, Jose M. Adam, Pedro A. Calderon, Salvador Sales
Summary: Fiber Optic Shape Sensing technology utilizes fiber optic cables to track the 3D shape and position of dynamic objects in real-time, offering advantages such as ease of installation, intrinsic safety, compactness, and resistance to harsh environments. This technology has a wide range of applications in various fields and has the potential to bring significant improvements to Civil, Mechanical, Aerospace Engineering, Biomedicine, and Medicine.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Optics
Gengsong Li, Zhen Liu, Jianxun Feng, Guiyao Zhou, Xuguang Huang
Summary: The fiber optic sensor developed for detecting Pb2+ concentration in aqueous solution utilizes a structure of no-core fiber/few-mode fiber coated with a smart hydrogel membrane. It offers high sensitivity, low cost, and remote detection abilities, making it a promising option for applications requiring precise concentration monitoring.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Heming Wei, Zhe Gong, Wenjing Wu, Jiawei Che, Liang Zhang, Fufei Pang, Tingyun Wang
Summary: A broadband fiber-optic acoustic sensing system is proposed and demonstrated, which can detect acoustic waves with frequencies from tens of hertz to hundreds of kilohertz, showing great potential for acoustic emission detection in real applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
S. Narasimman, L. Balakrishnan, Z. C. Alex
Summary: This study enhances the sensitivity and selectivity of ethanol sensors by functionalizing ZnO nanoflakes, providing a potential effective tool for ethanol detection.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Environmental
Yu Xi, Hui Shi, Ru Liu, Xiaocui Yin, Liming Yang, Manhong Huang, Xubiao Luo
Summary: A membrane fabrication method utilizing ion imprinted polymers on PVDF membrane was developed to enhance the selective separation of Cd2+ ions, showing promising results in batch rebind and permeation experiments. The specific binding sites in the ion imprinted membranes improved the rejection of Cd2+ ions and showed higher permselectivity factors compared to non-ion imprinted membranes. Chemical characterization and DFT calculation revealed the Cd2+ recognition sites on the functional groups of the ion imprinted membranes.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Stefano Manago, Giuseppe Quero, Gianluigi Zito, Gabriele Tullii, Francesco Galeotti, Marco Pisco, Anna Chiara De Luca, Andrea Cusano
Summary: This study investigated the influence of geometric configuration of SERS-active substrates on interaction with biological targets of various sizes. Results showed that SERS intensity was dependent on substrate geometry and its specific steric interfacing with biological targets.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Jie Hu, Xue Zou, Sihan Ji, Qiumeng Chen, Dongmei Wang, Zhengjun Gong
Summary: A new method based on NH2-MIL-53(Al) nanoprobe was presented for the direct luminescence assay of tricresyl phosphate (TCP). NH2-MIL-53(Al) exhibited excellent crystal structure and optical qualities, and the introduction of TCP caused significant dampening of the nanoprobe's photoluminescence signal. The technique was effectively used to detect TCP in water, offering a fresh perspective on recognizing organophosphorus flame retardants in environmental water.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Applied
Hangzhou Li, Qiumeng Chen, Zhixiao Zhang, Zhaoli Wang, Zhengjun Gong, Meikun Fan
Summary: A newly amino-functionalized luminescent Zr-based metal-organic framework (NU-1000-NH2) was designed for ultra-sensitive fluorescent detection of nitroaromatic explosives. The amino constructed in cavities of NU-1000NH2 can capture and bind the nitroaromatic molecules, causing fluorescence quenching due to the electron donor-acceptor interaction. The hydrogen-bonding effect between NU-1000-NH2 and analytes was also found assisting for binding and recognizing nitroaromatic explosives molecule.
Article
Chemistry, Analytical
Fan Li, Yuting Huang, Xueqing Wang, Dongmei Wang, Meikun Fan
Summary: In this work, a strategy combining surface-enhanced Raman scattering (SERS) and machine learning was developed to discriminate complex samples, particularly those with similar compositions, such as green tea products with different storage times. Surface-functionalized Ag nanoparticles were used as a SERS substrate to reveal the changes in the sensory components of green tea. The integration of PCA-SVM achieved high predictive accuracy in differentiating green tea with different storage times. The results demonstrate that the SERS-based PCA-SVM platform is a facile and reliable tool for identifying complex matrices with subtle differentiations.
Article
Environmental Sciences
Wenjun Wang, Huan Chen, Wei Zhu, Zhengjun Gong, Hui Yin, Chao Gao, Anni Zhu, Dongmei Wang
Summary: Real-time online monitoring of 117 regulated volatile organic compounds (VOCs) in ambient air was achieved by developing an innovative automated GC/MS system. The system effectively minimized the presence of interfering substances and successfully separated and detected the VOCs without the challenges faced by traditional methods. With optimized conditions, impressive precision and accuracy were achieved, making this system a valuable tool for VOC monitoring.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Chemistry, Analytical
Hangzhou Li, Qiumeng Chen, Yuanyuan Wang, Zhixiao Zhang, Huan Chen, Zhaoli Wang, Zhengjun Gong
Summary: In this study, an amino functionalized pyrene-based Zr-MOF (NU-1000-NH2) was synthesized and used to fabricate a convenient fluorescence turn-on pH sensor. The sensor achieved pH monitoring by inducing the release of a fluorescent ligand through the dissipation of NU-1000-NH2 crystals upon the reaction with hydroxide ions. Furthermore, a solid-phase pH film sensor was successfully constructed by embedding NU-1000-NH2 particles into polyvinyl alcohol (PVA) and combining it with the RGB model and smartphone detector.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Xiaoying Huang, Liping Shen, Huanhuan Zhu, Huan Chen, Zhengjun Gong
Summary: In this study, a UV-induced chemiluminescence (CL) sensing platform with potassium monopersulfate (PMS) as the source of reactive oxygen species (ROS) was established. The CL emission was greatly inhibited with the introduction of triphenyl phosphate (TPHP), a representative harmful organophosphate flame retardant (OPFR). A new CL platform for the sensing of TPHP was fabricated, demonstrating advantages of simple operation, rapid determination, miniaturization potential, high selectivity and sensitivity, with a limit of detection down to 42.3 ng/L. This work paves the way for fast discrimination of emerging contaminants and has great prospects in real-time environmental monitoring.
MICROCHEMICAL JOURNAL
(2023)
Article
Engineering, Environmental
Yuting Huang, Bingxue Yuan, Xueqing Wang, Yongsheng Dai, Dongmei Wang, Zhengjun Gong, Junmin Chen, Li Shen, Meikun Fan, Zhilin Li
Summary: The concept of spectral fingerprint is important in identifying relevant features in nontarget screening of environmental samples. Surface-enhanced Raman scattering (SERS) is an optical method that provides fingerprint-like chemical information at the single-molecule level. In this study, a 1D-CNN approach was used to accurately identify the SERS spectral signature of industrial wastewaters for source tracing. The SERS-1D-CNN platform showed excellent potential in pollution source tracing even in complex and unknown water environments.
Article
Chemistry, Multidisciplinary
Kai Jin, Miao Lv, Tengfei Wang, Zhengjun Gong
Summary: In this study, the fuel properties of hydrochar pellets derived from various N-containing biowastes were investigated through hydrothermal carbonization and pelletization. The introduction of N significantly enhanced the compressive strength of hydrochar pellets. Chlorella-derived hydrochar pellets exhibited the highest tensile strength. Protein/P model hydrochar had a higher water resistance index, while glycine/P model hydrochar was more hydrophilic. The N-containing biowaste had a significant effect on the fuel properties of hydrochar pellets, offering potential for value-added utilization as solid biofuel.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Chemistry, Analytical
Weixing Gao, Weiman Duan, Dandan Peng, Juan Li, Zhangmei Hu, Dongmei Wang, Zhengjun Gong, Meikun Fan
Summary: The complexity of substances in environmental water bodies is leading to severe ecotoxicological problems. Evaluating water quality accurately based on the species and concentration of chemicals alone is difficult due to the intricate interaction among various chemicals. Therefore, the acute toxicity evaluation of water is of significant importance in environmental monitoring, especially in emergency situations. This study proposes a SERS approach to evaluate the acute toxicity of fresh water for the first time, using indole as an indicator. It demonstrates the feasibility of using SERS-based microbial sensors to assess acute toxicity in water.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Yi Deng, Xiaoying Huang, Huanhuan Zhu, Xiaoke Zheng, Zhengjun Gong
Summary: A direct Ce4+/SO32- chemiluminescence system was developed for efficiently and sensitively detecting the TNBP flame retardant. The system showed fast determination, great selectivity, a wide linear range, low limit of detection, and good precision.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Physical
Muhammad Hassan, Raqiqa Tur Rasool, Ghulam Abbas Ashraf, Miao Lv, Abeer A. AlObaid, Suwanna Kitpati Boontanon, Zhengjun Gong
Summary: In this study, CoFe2-xMoxO4 heterogeneous catalysts were prepared and used as peroxymonosulfate (PMS) activators for the degradation of p-phenol sulfonic acid (PSA). The results showed that CoFe2-xMoxO4/PMS exhibited efficient catalytic degradation performance under the reaction conditions, and the Mo content had a positive correlation with catalytic activity, indicating the potential application of this catalyst for recalcitrant pollutant remediation.
SURFACES AND INTERFACES
(2023)
Article
Environmental Sciences
Juan Li, Xinghong Wang, Jiaxi Tang, Fan Li, Xueqing Wang, Tabdar Ali Deip Muhammad, Zhangmei Hu, Dongmei Wang, Zhengjun Gong, Meikun Fan
Summary: This article proposes a spectral fingerprinting and differentiation method based on SERS and machine learning for the identification and differentiation of chemical pollutants in drinking water springs. The results of the study demonstrate that by adjusting the surface adsorption on the SERS substrate, spectral fingerprint features can be extracted for distinguishing different pollution sources.
Article
Chemistry, Analytical
Qiumeng Chen, Nan Li, Yulu Tian, Qian Liu, Xue Zou, Meikun Fan, Zhengjun Gong
Summary: A selective fluorescent sensor for detecting hexavalent chromium (Cr(vi)) was developed using cetyltrimethylammonium chloride (CTAC) modified N-doped carbon dots (N-CDs-CTAC). The CTAC molecules self-assembled into micelles to encapsulate N-CDs, causing aggregation and enhanced fluorescence emission. The positively charged CTAC interacted with the negatively charged Cr(vi), allowing for selective recognition. The sensor achieved a detection limit of 40 nM and showed potential for environmental monitoring of Cr(vi).
