Article
Chemistry, Multidisciplinary
Shama Sadaf, Hongpeng Zhang, Ali Akhtar
Summary: In this study, a series of MoS2 and NiO nanocomposites were synthesized and used for detecting low concentrations of H2S gas. The MNO-10 gas sensor exhibited the highest response value, good selectivity, and long-term stability.
Article
Engineering, Electrical & Electronic
M. S. Lekshmi, K. J. Suja
Summary: Measuring exhaled volatile organic compounds (VOC) in human breath is a promising method for diagnosing diseases. Acetone, a VOC found in human breath, can indicate diabetes when its levels are higher than 1.8 ppm. This study investigates the dynamics of acetone sensors based on nickel oxide nanoparticles, analyzing the effects of temperature and UV activation. The results show that combining temperature and UV activation greatly improves the responsiveness and selectivity of the gas sensor for acetone.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Analytical
Eric Y. Li, Elluz Pacheco, Andrew F. Zhou, Peter X. Feng
Summary: This study reports the fabrication of multifunctional nanostructured diamond composites using chemical vapor deposition techniques. Four sensor prototypes were designed and tested based on different grain sizes of diamond materials. The experimental results showed that the UNCD composite exhibited good sensitivity to gases and high photocurrent response to deep UV illumination. The UNCD prototypes displayed a good balance in performance for multifunctional sensor applications in terms of responsivity, stability, and repeatability.
Article
Chemistry, Physical
Yanming Sun, Zhezhe Ding, Yupeng Zhang, Zhe Dong, Lei Sun, Neng Wang, Meijie Yin, Jian Zhang, Guo Ping Wang
Summary: In this study, a NO2 sensor based on NiO nanosheets composited with carbon nanocoils (CNCs) was developed, demonstrating significantly higher sensitivity compared to bare NiO nanosheets. The nanocomposite showed nearly 8 times higher response to 60 ppm NO2 at room temperature and had a detection concentration limit of 60.3 ppb, making it suitable for sensing NO2 at low concentrations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Shi-Chao Wang, Xiao-Hu Wang, Gao-Qun Qiao, Xiao-Yan Chen, Xin-Zhen Wang, Nan-Nan Wu, Jian Tian, Hong-Zhi Cui
Summary: A three-dimensional hierarchical ZnO structure modified with ultrafine NiO particles was synthesized successfully, exhibiting excellent isopropanol sensing properties. The Ni:Zn atomic ratio of 7.42:100 was found to be optimal for enhancing gas sensing performance. The composite showed high selectivity and sensitivity, fast response rate, low operating temperature, and a wide sensing range to isopropanol.
Article
Chemistry, Analytical
Hoang Thi Hien, Do Thi Anh Thu, Pham Quang Ngan, Giang Hong Thai, Do Thanh Trung, Tran Trung, Man Minh Tan, Ho Truong Giang
Summary: In this study, NiO/PPy hybrid nanostructured films were fabricated by chemical vapor-phase polymerization with NiO nanoparticles drop-coated with FeCl3 oxidant on Al2O3 substrates. By adjusting the content of FeCl3 oxidant, the ratios between NiO and PPy in the hybrid films were modified. The gas-sensing performance of the NiO/PPy films showed high sensitivity to NH3 gas, with the main contribution coming from the hybrid nanostructure between NiO nanoparticles and PPy.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Lili Jiang, Sihao Tu, Kang Xue, Haitao Yu, Xingang Hou
Summary: In this study, a SnO2/NiO composite material was prepared through co-precipitation, followed by the synthesis of a GO/SnO2/NiO ternary composite material. The ternary composite showed improved gas sensitivity to acetone compared to SnO2/NiO, with enhanced response time, recovery time, and sensitivity. GO/SnO2/NiO demonstrated great potential in acetone gas detection due to its unique structures and synergistic effects.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Analytical
Chen Su, Lu Zhang, Yutong Han, Cong Ren, Bolong Li, Tao Wang, Min Zeng, Yanjiu Su, Nantao Hu, Zhihua Zhou, Ying Wang, Zhi Yang, Lin Xu
Summary: A novel flower-like hierarchical NiO-ZnO heterostructure was synthesized using a one-step hydrothermal method with the assistance of glucose and further calcination treatment. Gas sensors based on this heterojunction showed excellent response and stability for glycol detection at relatively low operating temperature. This work demonstrates a great potential for efficient glycol gas detection by directly synthesizing G-NiO-ZnO heterojunction in a one-step approach.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Inorganic & Nuclear
S. Sudha, R. Ramprasath, S. Cholan, B. Gokul, S. Sridhar, H. Elhosiny Ali, Mohd Shkir
Summary: This study reports the synthesis, triethylamine gas sensing, and photocatalytic activity of Sn doped NiO nanoparticles using solvothermal technique. Characterization techniques such as XRD, Raman Spectroscopy, FE-SEM, TEM, UV-vis spectroscopy, and XPS were used to analyze the structural and optical properties of SNO particles. The SNO nanoparticles showed high triethylamine sensing response and efficient photocatalytic activity for Rhodamine B dye degradation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Haohua Li, Baibo Ding, Jian Wu, Quanjiang Lv
Summary: In this study, pure MoO3 and MoO3/NiO nanolamellas were fabricated and their structural and morphological properties were investigated. The gas sensing measurements showed that MoO3/NiO-5MN exhibited the best hydrogen sensing capability and selectivity, with a response rate 1.85 times higher than that of pure MoO3.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Ying Gao, Jinniu Zhang, Deying Leng, Gang Li, Yuanyi Zhang, Wei Wang, Qingfei Liang, Xiaorui Chen, Hongbing Lu, Jianzhi Gao
Summary: A series of porous Rh-NiO heterojunction nanofibers with different molar ratios were fabricated by a facile electrospinning technique to improve the sensing properties of p-type NiO. The sensor with an optimal Rh amount of 5 mol% showed the highest p-type response to acetone and excellent selectivity. The improved sensing response was attributed to the formation of ohmic contacts between Rh and NiO nanoparticles, chemical sensitization effect of Rh nanoparticles, and increased BET surface area.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
M. Amarnath, K. Gurunathan
Summary: In this study, room temperature operative carbon dioxide gas sensing electrodes were developed using a simple sonication assisted hydrothermal method. The sensor, particularly the rGO-8:2 type, showed high sensitivity of 40% towards 50 ppm CO2, with a quick response time of 6 seconds and recovery time of 5 seconds. The optimized amount of indium addition with nickel oxide significantly influenced CO2 sensing. This cost-effective method has the potential to be a candidate for fabricating room temperature CO2 gas sensors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
M. M. Gomaa, M. H. Sayed, V. L. Patil, M. Boshta, P. S. Patil
Summary: This study successfully obtained nickel oxide thin films using a cost-effective chemical spray pyrolysis approach, which showed a polycrystalline cubic structure. The optical transmittance decreased with increasing deposition time, and the highest sensitivity for NO2 detection was found in the NiO thin film deposited for 5 minutes, demonstrating good stability and selectivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
R. C. Ramola, Sandhya Negi, Mukesh Rawat, R. C. Singh, Fouran Singh
Summary: Zinc oxide (ZnO) is a versatile material with high thermal conductivity, electron mobility, wide band gap, and exciton binding energy, making it suitable for various device applications. Among these applications, gallium-doped ZnO thin films annealed at 700 degrees Celsius show the highest sensitivity and shortest response and recovery time for ethanol and acetone gases, demonstrating the potential for gas sensing applications.
Article
Chemistry, Physical
Yan Wang, Mengxia Yao, Rongfeng Guan, Zhanying Zhang, Jianliang Cao
Summary: In this study, In2O3 nanospheres and NiO nanoparticles decorated In2O3 nanospheres were successfully synthesized for enhanced methane sensing performance. Various characterization techniques were employed to identify their compositions, morphologies, and nanostructures. The results showed that the decorating of NiO significantly enhanced the sensing capability, reduced the optimal operating temperature, and exhibited excellent selectivity, repeatability, and stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
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)