Article
Chemistry, Physical
Qihua Liang, Jingjing Zheng, Xiaotian Li, Bo Zhang, Ni Bai, Guo-Dong Li
Summary: Porous spinel gallate nanospheres prepared by solvothermal method and low temperature calcination exhibit excellent gas sensing properties, with CdGa2O4 nanospheres showing outstanding formaldehyde sensing performance at 120 degrees Celsius.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Zhicheng Cai, Sunghoon Park
Summary: In this study, Co3O4-decorated porous TiO2 nanofibers were synthesized and characterized. The nanofiber exhibited a porous body structure and large surface area, which facilitated the adsorption of acetone gas. The nanofiber-based gas sensor showed good response and recovery times towards acetone gas, and could be a promising material for the fabrication of high selectivity acetone gas sensors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Zhicheng Cai, Jiho Park, Sunghoon Park
Summary: In this study, porous In2O3-ZnO nanofibers were prepared via electrospinning method to fabricate a toluene gas sensor. The sensor could operate at room temperature with the illumination of ultraviolet light (365 nm). The structural properties of the sensor were characterized, and it was found that the nanofibers consisted of subnanograins with numerous pores, resulting in a large surface area for increased gas-sensor contact. The sensor showed excellent toluene-sensing properties with high selectivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Zhicheng Cai, Jiho Park, Sunghoon Park
Summary: A series of porous Au nanoparticles (NPs) decorated with In2O3 nanoparticles (NPs) was embedded in ZnO nanofibers (NFs) using electrospinning and calcination methods. The gas-sensing properties of the resulting sensors were evaluated and it was found that the addition of In2O3 improved the response properties. The sensor with 0.03 g In(NO3)3 (S2) showed excellent stability, selectivity, and a high response to NO2 gas under UV irradiation at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Zhicheng Cai, Jiho Park, Sunghoon Park
Summary: Pd and Fe2O3 nanoparticles-embedded porous NiO nanofibers with high specific surface area were prepared using electrospinning. Adjusting the amount of Fe2O3 nanoparticles in the precursor solution regulated the morphological evolution and crystallization of oxide heterostructures, leading to enhanced gas sensing performance for hydrogen gas. The sensors exhibited excellent response towards 1000 ppm H-2 gas, with a response time of 11 seconds and good selectivity and stability.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
He Wang, Sirui Li, Hang Zhu, Shaoyuan Yu, Tianye Yang, Hongwei Zhao
Summary: We have successfully prepared a metal-organic-framework (MOF) derived In2O3 flower-like hierarchical architecture sensor using a near room-temperature template-free strategy and a subsequent accurate annealing process. The In2O3 flower-like hierarchical architecture sensor exhibits good sensitivity to trimethylamine, with a relatively low working temperature of 140 degrees C and a response of 35.2 for 20 ppm trimethylamine. The sensor's enhanced gas sensing performance can be attributed to the synergistic effect of its unique flower-like hierarchical architecture, porous hierarchical morphology, and abundant oxygen vacancies.
NEW JOURNAL OF CHEMISTRY
(2023)
Review
Chemistry, Inorganic & Nuclear
Ruksana Shaik, Roopa Kishore Kampara, Amit Kumar, Chandra Shekhar Sharma, Mahesh Kumar
Summary: With industrial escalation, air toxicity increases, leading to a decline in air quality. Monitoring environmental pollutants is essential for protecting animals and humans, as dangerous gases like NH3, H2S, CO2, etc., can cause fatal diseases.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Materials Science, Ceramics
Hyeon-Kyung Chang, Dong-Su Ko, Deok-Hyun Cho, Sungjin Kim, Ho-Nyun Lee, Hyo Sug Lee, Hyun-Jong Kim, Tae Joo Park, Young Min Park
Summary: The nanoporous SnO2@TiO2 heterostructure was synthesized through a modified thermal evaporation and atomic layer deposition process, enabling high sensitivity detection of formaldehyde. This structure exhibited a low detection limit, good linearity range, and high response, paving the way for exploring various applications such as biosensors, photocatalysts, and optoelectronic devices.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Analytical
Anton Bobkov, Victor Luchinin, Vyacheslav Moshnikov, Svetlana Nalimova, Yulia Spivak
Summary: Approaches are being developed to create composite materials with a fractal-percolation structure on intercalated porous matrices for increasing the sensitivity of gas adsorption sensors. Porous silicon, nickel-containing porous silicon, and zinc oxide have been synthesized as materials for such structures. Impedance spectroscopy analysis shows that the obtained materials exhibit high sensitivity to organic solvent vapors and can be used in gas sensors. A proposed model explains the high sensitivity and inductive nature of impedance at low frequencies by considering the structural features and fractal-percolation properties of the obtained oxide materials.
Article
Chemistry, Analytical
Qingting Li, Wen Zeng, Yanqiong Li
Summary: This article reviews the NO2 gas sensor based on metal oxides. It discusses the hazards of NO2, the disadvantages of chemiresistive sensors based on metal oxides, and different sensitive materials. It also explores NO2 gas sensors based on metal oxides from various aspects such as morphology, preparation, modification, doping, and composite.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Elena Lopez-Aymerich, Guillem Domenech-Gil, Mauricio Moreno, Paolo Pellegrino, Albert Romano-Rodriguez
Summary: Active research in nanostructured materials is aimed at improving electronic device characteristics, particularly in the field of gas sensors. Mixing different metal oxides on the same nanowire can broaden the response of gas sensors, resulting in improved performance without compromising miniaturization. This study focuses on the synthesis, characterization, and gas sensing performance of (GaxIn1-x)(2)O-3 nanowires, demonstrating promising results for the development of portable devices.
Article
Materials Science, Multidisciplinary
Bakyt Khaniyev, Margulan Ibraimov, Yerulan Sagidolda, Yerbolat Tezekbay, Tolagay Duisebayev, Ayan Tileu, Ainur Khaniyeva
Summary: The present study investigated the sensing characteristics of a gas sensor based on surface-modified porous silicon (PS) by depositing a metal oxide semiconductor layer. The PS layer was prepared through electrochemical etching of crystalline silicon, and a p-CuO layer was obtained on the surface of the p-PS using DC magnetron sputtering technology. The material's structural, morphological, and sensing behavior were analyzed, and the CuO/PS-based gas sensors showed good sensitivity for toluene and chloroform vapors. The sensing mechanism was explained using schematic energy band diagrams. This approach is beneficial for the development of a simple and cost-effective sensor for detecting non-polar chemical analytes.
Article
Chemistry, Physical
C. A. Betty, Sipra Choudhury, Alpa Shah
Summary: Nanocrystalline metal oxide thin films have higher sensitivity for toxic gas sensing at lower temperatures than their bulk counterparts, allowing for the miniaturization of sensors for wearable and portable field trials without sacrificing sensitivity, but with improved selectivity. The properties of nanomaterials, such as size, morphology, geometry, preparation methods, and composition, play a crucial role in the sensor's sensitivity, selectivity, response time, and stability. However, the commercialization of nanostructured materials for toxic gas sensing has been hindered by reliability issues. This review focuses on the advances in room temperature operating sensors and their toxic gas sensing mechanism based on the design of nanostructured metal oxide semiconductors and heterostructures, highlighting their high sensitivity, selectivity, and reliability.
SURFACES AND INTERFACES
(2023)
Review
Materials Science, Ceramics
Chenyang Wang, Yanyan Wang, Zhi Yang, Nantao Hu
Summary: Graphene is considered a promising gas sensing material due to its high specific surface area and good conductivity. Recent studies have shown that graphene-based gas sensors doped with metals, polymers, and metal oxides exhibit good sensitivity, selectivity, and repeatability. Possible improvement methods and common problems characteristic of graphene-based gas sensors are discussed in this review.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Xingtai Chen, Tao Liu, Zhaoru Li, Xi-Tao Yin
Summary: Gas sensors, especially metal oxide semiconductors, have been widely used in various fields, and modification methods such as special structures, doping, and precious metal loading can improve their gas-sensitive performance. This review summarizes the progress in the modification of metal oxides, including their response, selectivity, and operating temperature, and focuses on the gas-sensitive mechanisms. The bottlenecks and future development prospects of current metal oxide semiconductor n-Butanol gas sensors are also discussed.
MATERIALS TODAY CHEMISTRY
(2023)
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)