Review
Engineering, Electrical & Electronic
Julaiba Tahsina Mazumder, Ravindra Kumar Jha, Hyoun Woo Kim, Sang Sub Kim
Summary: With the advancement of technology and our pursuit of better living standards, there has been a concerning surge in pollutants from various sources. Detecting toxic gases is crucial for ensuring public health and safety. This article discusses the development of capacitive gas sensors based on metal oxides, composites, and nanostructures, focusing on their sensing ability, performance, and future applications. It also addresses the limitations and potential improvements in terms of stability, sensitivity, response time, and detection in ambient environments.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Mingfang Kang, Tong Liu, Hongmei Sun, Lin Li, Keliang Wang
Summary: In this study, the absorption performance of ambient nitrogenous toxic gases on a monolayer of blue phosphorus phase germanium selenide (GeSe) was investigated using density-functional theory calculations. The results showed that GeSe monolayer exhibits higher sensitivity and selectivity for the hazardous gas NO.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Nanoscience & Nanotechnology
Xingang Jiang, Guanghui Zhang, Wencai Yi, Tao Yang, Xiaobing Liu
Summary: This study demonstrates that the penta-BeP2 monolayer is an excellent sensor for toxic gases, showing high selectivity, sensitivity, and reversibility.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Environmental
Icell Sharafeldin, Sara Garcia-Rios, Nashaat Ahmed, Miriam Alvarado, Xavier Vilanova, Nageh K. Allam
Summary: A toxic gas detector based on an array of metal-decorated multiwalled carbon nanotubes sensors was reported, with investigation on the sensors' response towards NO2, H2S, NH3, and CO gases. The experimental results demonstrated varied sensitivity and response of different metal-decorated MWCNTs sensors towards exposure to different toxic gases.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Nathan T. Riek, Seth So, Murat Akcakaya, Minhee Yun
Summary: Modern developments in gas sensor technology have led to smaller size, increased sensitivity, and selectivity. In our research, we utilize a sensor array featuring a hybrid combination of metals and organic polymers, along with machine learning, to detect a range of VOCs and toxic gases. Through a thorough analysis of machine learning classifiers, we determined that ensemble classifiers using normalized sensor data as features yield the best classification results.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Amruta B. Nagare, Namdev S. Harale, Suprimkumar D. Dhas, Umesh V. Shembade, Suhas R. Ghatage, Pramod S. Patil, Annasaheb V. Moholkar
Summary: Nanogranular polypyrrole (PPy) thin films were successfully synthesized by in-situ oxidative polymerization and drop casting method. The films exhibited agglomerated granular-like morphology with high roughness. The optimized PPy thin film gas sensor showed excellent response and stability towards NO2 gas even at low concentrations.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Metallurgy & Metallurgical Engineering
Ya-nan Zhou, Xi-bing Li, Chen-di Min, Yun Fan, Lei Gan, Ying Shi
Summary: This study examined the issue of toxic gas generation during the process of cemented backfill with phosphorus waste. The gases were found to be mainly generated from the acidic binder, with a generation sequence of PCl3, PH3, NO, H2S, NH3, and CO. Lowering the pH of the cemented slurry increased the gas yield, but the addition of 12 wt% CaO was able to reduce the gas yield by 99%. When the pH of the backfill slurry reached 10, gas generation could be controlled. These findings have implications for worker health and environmental pollution reduction.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Review
Chemistry, Analytical
Qichao Dong, Min Xiao, Zengyong Chu, Guochen Li, Ye Zhang
Summary: Air pollution is a growing global concern. Sensors are being developed for detecting harmful gases, with graphene showing promise due to its high sensitivity. Recent studies have shown that graphene with a 3D structure can increase gas sensitivity levels.
Review
Environmental Sciences
Manoj Devaraj, Saravanan Rajendran, Tuan K. A. Hoang, Matias Soto-Moscoso
Summary: In the search for viable candidates for pollutant gas sensing, two-dimensional material transition metal carbides (MXenes) have attracted great attention for their outstanding physical and chemical properties. The unique 2D layered structure of MXenes, with high conductivity, mechanical strength, and adsorption properties, allows for strong interactions with gaseous molecules and holds promise for developing ideal gas sensing devices. This review focuses on recent achievements in MXene-based materials for room temperature inorganic gas sensors and provides a comprehensive understanding through theoretical and experimental studies. The review discusses the properties and advantages of MXene as a sensing material compared to other 2D materials, the unique advantages of chemiresistive based sensors, the demerits of other detection methods, the structural design of MXene for improved sensing performance, the interaction between MXene and adsorbed gases, and possible sensing mechanisms. The review concludes with an overview of current progress, opportunities, and perspectives for the future improvement of MXene in gas sensors.
Article
Environmental Sciences
Van Thuan Le, Yasser Vasseghian, Van Dat Doan, Thi Thu Trang Nguyen, Thu-Thao Thi Vo, Ha Huu Do, Khanh B Vu, Quang Hieu Vu, Tran Dai Lam, Vy Anh Tran
Summary: In this study, a Ti3C2-MoS2 composite with high sensitivity and cyclic response curves to dangerous gases at room temperature was created using 2D MXenes and MoS2 materials. The composite demonstrated a significant dependence on NO2 concentration and also showed reaction signals to other hazardous gases.
Article
Chemistry, Physical
Sarfraz Ahmed, Abdul Jalil, Syed Zafar Ilyas, Ather Hassan, Ahsan Ilahi, Ishaq Ahmed, Maaz Khan, Qasim Khan
Summary: First-principles calculations were used to investigate the gas sensing behavior of various gas molecules on the B4C3 monolayer. The results showed that B4C3 exhibited superior gas sensing performance compared to other 2D materials. The adsorption behavior, charge transfer, and bandgap variation of gas molecules on the B4C3 surface played key roles in its gas sensing applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Tongwei Yuan, Zhiheng Ma, Farzin Nekouei, Wenshuang Zhang, Jiaqiang Xu
Summary: A new method of etching-calcination was proposed to produce porous n-ZnO/p-Co3O4 nanoplates with superior gas sensing performance. The characterization analysis revealed that the material had a high specific surface area, abundant surface oxygen vacancies, and a p-n heterojunction. The material exhibited excellent CO detection with high response value and anti-interference ability. Furthermore, a comparison experiment was conducted to investigate the synthesis and gas sensing mechanism in depth.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Engineering, Electrical & Electronic
Zong-Mu Dong, Qian Xia, Xiaojing Lu, Jiarui Huang, Sang Woo Joo
Summary: In2O3 octahedrons with unique morphology and high crystallinity were obtained through a freeze-drying process and calcination treatment, and they exhibited superior sensing performance for volatile organic compounds detection.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Chemical
Jiri Rysavy, Jiri Horak, Frantisek Hopan, Lenka Kubonova, Kamil Krpec, Oleksandr Molchanov, Martin Garba, Tadeas Ochodek
Summary: Two honeycomb catalysts were used for oxidizing CO and C3H8 in flue gas, with Cat B showing higher effectiveness than Cat A. The study observed the significant influence of combustion phase on C3H8 conversion rate.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Doudou Zhao, Mingxin Yan, Leqian Guo, Danmeng Liu, Ruo Zhang, Hong Yan, Pengfei Qu, Shaonong Dang
Summary: This study examined the association between stove cooking during pregnancy and congenital heart disease in offspring. The findings suggest that using electromagnetic, coal, and firewood stoves for cooking during pregnancy, as well as higher cooking frequency, increased the risk of congenital heart disease in offspring.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Analytical
Mengmeng Guo, Na Luo, Yueling Bai, Zhenggang Xue, Qingmin Hu, Jiaqiang Xu
Summary: A porous heterostructure WO3-C/In2O3 was designed and prepared for a miniature H2 sensor, which showed higher response value, lower operating temperature, fast response-recovery speed, and low limit of detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Feng Hu, Hui Hu, Yuting Li, Xiaohui Wang, Xiaowen Shi
Summary: Arsenic contamination in water bodies is a significant health risk. This study developed a chitosan-catechol modified electrode for rapid and accurate detection of trace amounts of arsenic. The modified electrode demonstrated good detection capability and resistance to ionic interference, making it suitable for in situ detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Yantao Zhang, Qian Liu, Tao Tian, Chunhua Xu, Pengli Yang, Lianju Ma, Yi Hou, Hui Zhou, Yongjun Gan
Summary: In this study, a lysosome-targeting buffering fluorogenic probe (Lyso-BFP) was designed and synthesized, demonstrating excellent photostability, pH specificity, and responsiveness to lysosomal acidification in living cells. The performance of Lyso-BFP in pH sensing was attributed to the inhibition of the photo-induced electron transfer process. Lyso-BFP allowed for wash-free imaging and long-term real-time monitoring of lysosome pH changes based on its off-on fluorescence behavior and buffer strategy.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Wei Cai, Wenbo Sun, Jiayue Wang, Xiaokui Huo, Xudong Cao, Xiangge Tian, Xiaochi Ma, Lei Feng
Summary: In this study, a near-infrared fluorescent probe HCBG was developed for imaging of alpha-GLC. HCBG exhibited excellent selectivity and sensitivity towards alpha-GLC in complex bio-samples, and showed good cell permeability for in situ real-time imaging. Through the high-throughput screening system established by HCBG, a natural alpha-GLC inhibitor was successfully isolated and identified. This study provides a novel fluorescence visualization tool for discovering and exploring the biological functions of diabetes-related gut microbiota, and a high-throughput screening approach for alpha-GLC inhibitor.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Trey W. Pittman, Xi Zhang, Chamindie Punyadeera, Charles S. Henry
Summary: Heart failure is a growing epidemic and a significant clinical and public health problem. Researchers have developed a portable and affordable diagnostic device for heart failure that can be used at the point-of-care, providing a valid alternative to current diagnostics approaches.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Anders O. Tjell, Barbara Jud, Roland Schaller-Ammann, Torsten Mayr
Summary: An optical hydrogen peroxide sensor based on catalytic degradation and the detection of produced oxygen is presented. The sensor offers higher resolution and better sensitivity at lower H2O2 concentrations. By removing O2 from the sample solution, a more sensitive O2 sensor can be used for measurement. The sensor has been successfully applied in a flow-through cell to measure H2O2 concentration in different flow rates.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Seong Jae Kim, Ji-hun Jeong, Gaabhin Ryu, Yoon Sick Eom, Sanha Kim
Summary: Surface-enhanced Raman spectroscopy (SERS) is a high-sensitivity, label-free detection method with various analytical applications. Researchers have developed a hydrophobic SERS substrate based on engineered carbon nanotube arrays (CNT-SERS) and studied the role of structural design at both micro and nanoscales. The substrate demonstrated controlled self-enrichment capability and enhanced sensitivity, with a significant increase in the SERS signal. The study also proposed a theoretical model and a concentration strategy inspired by plants for analyte deposition on microarrays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Dan Zhao, Renjun Jiang, Xiaoqiang Liu, Subbiah Alwarappan
Summary: In this study, a novel ternary composite material was constructed by assembling cerium vanadate nanorods on reduced graphene oxide-microcrystalline cellulose nanosheets, and it was used for real-time monitoring of the concentration of superoxide anions in vivo. The ternary composite showed excellent conductivity, large surface area, and abundant active sites, leading to a wider linear range, high sensitivity, low detection limit, and fast response time for superoxide anion detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Tengfei Wang, Liwen Wang, Guang Wu, Dating Tian
Summary: In this study, a covalent organic framework material TaTp-COF with porous and uniform spheres was successfully prepared via hydrothermal reaction, and it was found to significantly enhance the aggregation-induced emission (AIE) of berberine. The unique emission properties of berberine on TaTp-COF were studied and utilized for the sensitive detection of berberine.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Lin Li, Yilei Ding, Lei Xu, Shuoran Chen, Guoliang Dai, Pengju Han, Lixin Lu, Changqing Ye, Yanlin Song
Summary: In this study, a novel TTI based on a ratiometric fluorescent nanosensor is designed, which has the advantages of high accuracy and low cost. Experimental and theoretical investigations confirm its pH responsiveness and demonstrate its good sensitivity and reliability. By monitoring the total volatile basic nitrogen, this TTI can accurately predict food spoilage and can be adaptively modified for different types of food. The TTI based on this nanosensor enables visual monitoring of food quality.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Fangju Chen, Xueting Wang, Wei Chen, Chenwen Shao, Yong Qian
Summary: Lung cancer is the second most common malignant tumor worldwide. Drug resistance in lung cancer leads to treatment failure and recurrence in majority of patients. This study developed a fluorescent prodrug that can be activated in cancer cells to release drugs, and its signal can be tracked by imaging. It shows a unique autophagy-driven ferroptosis effect, indicating its potential for targeting drug-resistant cancer cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Weichao Li, Qiming Yuan, Zhangcheng Xia, Xiaoxue Ma, Lifang He, Ling Jin, Xiangfeng Chu, Kui Zhang
Summary: This study developed a high-performance gas sensor for formaldehyde detection by modifying ZnSnO3 with ZnO QDs and SnO2 QDs. The modified sensor showed improved sensing response and lower working temperature. The presence of ZnO QDs formed rich heterojunctions, increased surface area, and provided oxygen deficiency for formaldehyde sensing reaction, thus enhancing the sensor performance. This research provides an alternative method to enhance the sensing properties of MOS by QDs modification.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Joung-Il Moon, Eun Jung Choi, Younju Joung, Jin-Woo Oh, Sang-Woo Joo, Jaebum Choo
Summary: A novel nanoplasmonic substrate was developed for biomedical applications, which showed strong hot spots for detecting biomarkers at low concentrations. The substrate, called AuNPs@M13, was made by immobilizing 60 nm gold nanoparticles onto the surface of an M13 bacteriophage scaffold. It demonstrated higher sensitivity and lower limit of detection compared to commercially available assays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Ning Li, Ya Zhang, Ying Xu, Xiaofang Liu, Jian Chen, Mei Yang, Changjun Hou, Danqun Huo
Summary: The molecular subtype of breast cancer guides treatment and drug selection. Invasive tests can promote cancer cell metastasis, so the development of high-performance, low-cost diagnostic tools for cancer prognosis is crucial. Liquid biopsy techniques enable noninvasive, real-time, dynamic, multicomponent, quantitative, and long-term observations at the cellular, genetic, and molecular levels. A Cu-Zr metal-organic framework (MOF) nanoenzyme with monatomic Cu attachment has been synthesized and proven to have high catalytic performance. The sensor constructed using this nanoenzyme shows potential for accurate classification of breast cancer serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Jeongmin Kim, Hyemin Kim, Seunghyun Park, Hyeonaug Hong, Yong Jae Kim, Jiyong Lee, Jaeho Kim, Seung-Woo Cho, Wonhyoung Ryu
Summary: This study presents a method to fabricate independently functioning microneedle (MN) electrodes with narrow intervals for high precision electrochemical sensing. The optimized mixture of photocurable polymer and single-wall carbon nanotubes was used to mold single composite MNs, which were then attached to pre-patterned electrodes. Plasma etching and electropolymerization were performed to enhance the electrochemical activity, and Prussian blue and glucose oxidase were electrodeposited on the MNs for glucose detection. The MN electrodes showed good sensitivity and linearity, and the feasibility of glucose detection was demonstrated in an in vivo mouse study.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)