Article
Chemistry, Physical
Muhammad Waqas Khan, M. Munir Sadiq, Karuppasamy Gopalsamy, Kai Xu, Azmira Jannat, Bao Yue Zhang, Md Mohiuddin, Muhammad Haris, Rui Ou, Sanjida Afrin, Turki Alkathiri, Suraj Loomba, Xavier Mulet, Nasir Mahmood, Ravichandar Babarao, Jian Zhen Ou
Summary: Metal-organic frameworks (MOFs) are considered promising candidates for gas sensing applications, with hetero-metallic MOFs showing enhanced room temperature NO2 sensing performances through partial metal replacement. This work demonstrates the strong potential of carefully engineered hetero-metallic MOFs for power-saving and high-performance gas sensing applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
V. L. Patil, D. S. Dalavi, S. B. Dhavale, N. L. Tarwal, S. A. Vanalakar, A. S. Kalekar, J. H. Kim, P. S. Patil
Summary: This report focuses on the deposition of nanocrystalline aluminium doped ZnO (Al doped ZnO: AZO) samples on seeded glass substrates using a cost-effective reflux method. The doping concentration of 'Al' ions ranged from 1 to 3 vol%. The study found that the deposited AZO samples exhibited a wurtzite hexagonal crystal structure and the formation of nanorods for undoped ZnO, with a reduction in diameter and the formation of fine tips for AZO samples. The photoluminescence study confirmed the presence of oxygen vacancies and defects in the AZO samples. Furthermore, the AZO samples demonstrated excellent gas sensing performance towards NO2 gas at a temperature of 175 degrees C, with a gas sensitivity of 85% for 5 ppm NO2 gas. This work shows promise for practical applications in the gas sensor technology field, particularly for low detection limits at low operating temperatures.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Nanoscience & Nanotechnology
Yixuan Huang, Donglin Li, Wenxiang Chai, Dingfeng Jin, Hongxiao Jin
Summary: To enhance the gas sensing property of MoS2 nanoflowers, fluorine was doped using a hydrothermal method. The fluorine-doped samples showed shorter recovery time and increased sensitivity compared to pure MoS2. This study contributes to the development of new molybdenum sulfide-based gas sensor.
Article
Chemistry, Analytical
Xiuyu Wang, Tao Tao, Zhinan Qi, Binxin Leng, Wen Xu, Jiajun Ma, Mingming Wang
Summary: In this study, Al-doped ZnSn(OH)(6) crystalline precursors were synthesized with the addition of 4 wt% triethanolamine. After dehydration and phase transition, amorphous Zn1-xAlxSnO3+x/2 samples were obtained. Al-doping weakened UV absorption of ZnSnO3, but nano-TiO2 decoration strengthened it. By discussing the effects of Al-doping and nano-TiO2 decoration, the gas-sensing properties of ZnSnO3 were improved.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Environmental
Jianhong Zhou, Ke Xue, Yaoda Liu, Tingting Liang, Pengfei Zhang, Xu Zhang, Wentao Zhang, Zhengfei Dai
Summary: In this study, two-dimensional SnS2 nanosheets doped with Mo were synthesized and used for the highly sensitive and selective detection of NO2. The Mo doping significantly enhanced the sensing response and revealed an abnormal p-n sensing transition characteristic.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Analytical
Xiqian Sun, Qing Lan, Jing Geng, Mengli Yu, Yecheng Li, Xiaohong Li, Li Chen
Summary: By assembling TiO2 nanoparticles decorated with polyoxometalate (POM) and organic dye molecules, we have achieved accelerated room-temperature sensing of NO2 gas under visible light illumination. This method improves the sensitivity and response/recovery time of the gas sensors, while maintaining high selectivity and relatively low detection concentration.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Yongguang Liu, Jianxin Ma, Lei Dai, Weiwei Meng, Ling Wang
Summary: This paper proposes the use of halogen doping to improve the performance of the impedimetric NO2 sensor. The effects of halogen anion doping on the NO2 sensing performance of the sensors were investigated. Among all sensors, the sensor based on LSCF0.05-SE exhibits the highest response and sensitivity at 450 degrees, and has good stability and anti-interference ability.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Multidisciplinary
Tianding Chen, Wenhao Yan, Ying Wang, Jinli Li, Haibo Hu, Derek Ho
Summary: The study presents a new method for achieving ultra-fast NO2 gas sensing and recovery dynamics using a nanohybrid of SnS2 and MXene derived TiO2, achieving unprecedented levels of dynamic performance.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Ceramics
S. C. Kulkarni, Krishna D. Bhalerao, Sayantra Shirse, Yogesh T. Nakate, Umesh T. Nakate, Bidhan Pandit, M. A. Yewale
Summary: The pristine and various mole% (1, 3, 5, 7, and 9) Zn-doped In2O3 nanocrystalline materials were successfully prepared using sol-gel and screen-printing thick film methods. The 7% mole Zn doped In2O3 sensor showed superior gas sensing properties and excellent selectivity towards NO2 gas compared to other doped and pure In2O3 sensors. The highest response of 117 was obtained for 100 ppm NO2 gas at 50 degrees C temperature.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Yan Gong, Xiaofeng Wu, Xiaofei Li, Anqi Wang, Min Zhang, Yunfa Chen
Summary: Core-shell Pt@Al-doped ZnO nanoparticles were synthesized and assembled into a sensor, showing excellent sensitivity and low detection limit towards acetone. The synergistic effect between Al doping and metal-ZnO hetero-interfaces significantly improves the acetone sensing properties of the sensor.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Lifeng Han, Yuheng Liu, Chaoqun Chang, Meng Liu, Zhikun Peng, Feilong Gong
Summary: In this study, we reported the design of a cactus-like Mo-WO3 nanoarchitecture which exhibited significantly improved NO2 sensing performance. The nanoarchitecture showed enhanced sensitivity and decreased recovery time compared to pristine WO3.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Xin Lv, Caihui Feng, Tingting Lin
Summary: This paper investigates the ability of boron (B) as a dopant in TiO2 nanofibers for use in humidity sensing. The influences of B content on the phase transition, specific surface area, morphology, and surface valence of TiO2 nanofibers are studied. The results show that B is successfully incorporated into the TiO2 lattice using interstitial mode, inducing an increase in humidity sensitivity. The B-doped TiO2 nanofibers based on the optimum B/Ti molar ratios exhibit high sensitivity, quick response and recovery time, and favorable repeatability and stability.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Chemistry, Analytical
Huimin Yang, Xiang Li, Qirui Wu, Huiyu Su, Chaofan Ma, Xiaoxia Wang, Changsheng Xie, Dawen Zeng
Summary: SnS2 with special layer stacking structure is widely studied as a gas sensing material, but faces challenges of high baseline resistance and poor sensitivity at low operating temperatures. Here, doped Ce-SnS2 with enlarged interlayer spacing was prepared and showed outstanding gas sensing performance for NO2. At a low temperature of 100 degrees C, it exhibited significant gas sensing response to 500 ppb NO2, while pristine SnS2 showed no response. The gas sensing enhancement mechanism was explained by DFT, indicating that the introduction of highly active Ce sites and interlayer engineering improved the gas sensing performance of Ce-SnS2.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Nanoscience & Nanotechnology
Quan Sun, Yanqiu Li, Juanyuan Hao, Shengliang Zheng, Tianyue Zhang, Tingting Wang, Ruozhen Wu, Haitao Fang, You Wang
Summary: The SnS2/TiO2 heterostructure sensor showed excellent performance in detecting NO2, with a high response factor of 526% towards 1 ppm NO2 and a short response/recovery time of 43/102 s at room temperature. The decrease in surface-adsorbed oxygen content confirmed that light illumination helped in clearing the surface of SnS2/TiO2, providing more active sites for NO2 sensing. Additionally, a flexible SnS2/TiO2 sensor was fabricated to confirm its potential application in portable and wearable devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Siwei Liu, Mingyuan Wang, Guiwu Liu, Neng Wan, Chuanxin Ge, Shahid Hussain, Haining Meng, Mingsong Wang, Guanjun Qiao
Summary: In this study, Ti3C2/TiO2 nanocomposites were synthesized through in-situ growth of TiO2 on the surface of multilayer Ti3C2 MXene, showing improved response to NO2 gas and excellent gas-sensing performance. The formation of a Schottky barrier at the Ti3C2/TiO2 interface contributed to the outstanding response and selectivity of the composites. This work provides a simple method to enhance the gas-sensing performance of MXene materials in practical applications.
APPLIED SURFACE SCIENCE
(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)