Article
Materials Science, Multidisciplinary
M. Benamara, S. Soreto Teixeira, M. P. F. Graca, M. A. Valente, Suresh Kumar Jakka, H. Dahman, E. Dhahri, L. El Mir, M. Debliquy, D. Lahem
Summary: ZnO nanoparticles were prepared using the auto-combustion method, exhibiting hexagonal wurtzite structure. The samples showed high conductivity and promising gas detection capabilities, with a sensor response to NO2 concentrations and wavelengths, especially at UV wavelengths, resulting in high response rates for gas detection applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Engineering, Environmental
Chaohan Han, Xiaowei Li, Yu Liu, Xinghua Li, Changlu Shao, Jisong Ri, Jiangang Ma, Yichun Liu
Summary: A room-temperature NO2 sensor with greatly enhanced sensitivity and rapid response/recovery speed under ultraviolet (UV) illumination has been proposed. The sensor based on In2O3/ZnO yolk-shell nanofibers exhibits remarkable sensitivity and quick response/recovery time, outperforming the performance in dark conditions. These results were attributed to the improved photo-generated charge separation efficiency and increased reactive sites and gas adsorption provided by the heterojunction effect of In2O3/ZnO yolk-shell nanofibers.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Jae-Hyoung Lee, Jin-Young Kim, Myung-Sung Nam, Ali Mirzaei, Hyoun Woo Kim, Sang Sub Kim
Summary: Ternary hybrid composite of PANI-loaded Co3O4-TiO2 nanoparticles was synthesized and investigated for acetone sensing at 25°C. The 0.01 wt% PANI-loaded 0.85TiO2-0.15 Co3O4 composite nanoparticles showed the highest response to acetone under UV illumination. The improved performance was attributed to the formation of p-n heterojunctions, promising effects of PANI, and the UV light effect. This study highlights the potential of these compounds or related compounds for highly reliable acetone sensing at 25°C.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Young-Woo Jang, Jingu Kang, Jeong-Wan Jo, Yong-Hoon Kim, Jaekyun Kim, Sung Kyu Park
Summary: This study demonstrates a versatile approach to realize room-temperature operable and fast recovery amorphous oxide semiconductor-based gas sensors using multi-wavelength ultraviolet illumination. The research shows that different wavelengths of UV light can enable a gas sensor to monitor nitrogen dioxide at various concentrations down to sub-ppm level. By controlling the illumination time, the detachment of NO2 gas from the surface of the semiconductor can be significantly reduced, enhancing the gas-sensing properties.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Lijia Zhao, Shupeng Sun, Su Zhang, Zhi Liu, Baoyu Huang, Nan Wang, Jianwei Zhang, Xiaogan Li
Summary: The hollow ZnO@TiO2 heterostructured nanospheres were successfully synthesized by hydrothermal method, and the response and recovery time of the sensor towards formaldehyde were significantly improved by UV activation.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Kun Hu, Yuanfan Li, Chuanxin Ge, Ling Bai, Guiwu Liu, Guanjun Qiao, Sung Gu Kang, Eui Jung Kim, Mingsong Wang
Summary: In this work, a three-dimensional ordered macroporous Au-loaded SnO2 sensor was developed, demonstrating ultrahigh room-temperature ppb-level NO2 sensitivity under intermittent UV light irradiation. The Au/SnO2 inverse opal structure was fabricated using a polystyrene opal crystal template, with finely dispersed Au nanoparticles anchored on the interconnected walls of SnO2. The decoration of Au nanoparticles improved the NO2 response of SnO2, especially under intermittent UV irradiation. The sensing mechanism responsible for the enhanced response toward NO2 was explained.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Zhirui Li, Hui Huang, Danna Zhao, Shunji Chen, Weicheng Cai, Tianlin Tang
Summary: A reliable and high-performance oxygen sensor based on TiO2-decorated GaN nanowires was fabricated, which can operate under UV irradiation at room temperature. Experimental results showed that the sensor had maximum response and a limit of detection as low as 0.45% O2 when the TiO2 film thickness was 5 nm. In addition, the sensor exhibited enhanced O2 sensing with lower wavelength UV illumination. The sensor also demonstrated excellent repeatability, selectivity and long-term stability, making it suitable for various applications in the field of O2 gas sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Multidisciplinary
Bo Zhang, Shuai Zhang, Yi Xia, Pingping Yu, Yin Xu, Yue Dong, Qufu Wei, Jing Wang
Summary: Optical excitation is an effective method for balancing sensor responses and response/recovery properties at room temperature. In this study, Au/SnO2 nanowires were synthesized and compared with pure SnO2 in terms of sensing properties, highlighting the crucial role of localized surface plasmon resonance.
Article
Nanoscience & Nanotechnology
Phung Dinh Hoat, Yeonghun Yun, ByungJin Park, Pham Tien Hung, Vu Xuan Hien, Joon-Hyung Lee, Sangwook Lee, Young-Woo Heo
Summary: A thin film of Cs2TeI6 perovskite was prepared on a glass substrate via a non-solution process, and its gas-sensing properties, especially the high selectivity and low detection limit for NO2 gas, were studied. The results show the potential application of this sensor for NO2 gas sensing at room temperature.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Bo Zhang, Nan Bao, Tao Wang, Yin Xu, Yue Dong, Yi Ni, Pingping Yu, Qufu Wei, Jing Wang, Lanlan Guo, Yi Xia
Summary: A batch of In2O3 nanowires were prepared using a simple electrospinning method and sintering process, showing high purity and crystallinity through XRD analysis. The nanowires exhibited high quality and uniformity based on FESEM and TEM analysis. The sensor based on In2O3 NWs showed high selectivity towards NO2 and low detection limit, but had a significant defect of long recovery process, which was successfully solved by introducing visible light irradiation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Chandrakalavathi Thota, Jeevan Kumar Reddy Modigunta, Maddaka Reddeppa, Young Ho Park, Hyejin Kim, Hansol Kang, Samanth Kokkiligadda, Seongeun Lee, G. Murali, Sung Young Park, Insik In
Summary: In this study, a light-activated gas sensor utilizing carbon quantum dots and silver nanoparticles was successfully developed. By controlling the flow direction of photogenerated electrons and utilizing excellent oxygen dissociation ability, the sensor exhibited exceptional selectivity and sensitivity towards hydrogen sulfide gas, enabling detection at low concentrations.
Article
Materials Science, Multidisciplinary
Qingyu Liu, Shuxing Fan, Lijuan Fu, Chaoqiang Liu, Jiapeng Xu, Wei Tang
Summary: A flexible gas sensor based on carbon quantum dot decorated TiO2 nanofibers (CQD/TiO2) was developed to detect formaldehyde at room temperature, showing lower detection limit and faster response/recovery time.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
Youzhi Yang, Sini Wu, Yuehong Cao, Shuang Li, Tengfeng Xie, Yanhong Lin, Ziheng Li
Summary: The development of room-temperature formaldehyde gas sensors with superior response-ability is crucial for various applications. In this study, Ni-doped ZnO hierarchical porous structures decorated with NiS composite materials were synthesized and used in room-temperature UV light-activated formaldehyde sensors. The 0.2% NiS/0.4% Ni-ZnO material showed a higher response value and faster response/recovery time compared to pure ZnO, which was attributed to the synergistic effect of Ni doping and NiS modification.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Jaehyeok Shin, Sangmoon Han, Siyun Noh, Yeon-Tae Yu, Jin Soo Kim
Summary: This study demonstrates the successful development of a light-assisted NO2 gas sensor with high response at room temperature, using high-crystalline undoped-GaN nanowires and graphene. The sensor shows good long-term stability and selectivity to NO2 gas, surpassing previous GaN-based sensors. The use of undoped-GaN nanowires simplifies the fabrication process for room-temperature gas sensors without the need for additional catalysts.
Article
Engineering, Electrical & Electronic
Xingxin He, Zhihua Ying, Fei Wen, Lili Li, Xiaolong Zheng, Peng Zheng, Gaofeng Wang
Summary: MoS2, a two-dimensional material, has potential in gas sensor field due to its large specific surface area and remarkable electrical performance. However, previous studies found drawbacks in MoS2-based gas sensors, leading to low response and instability. By forming a composite material with a suitable amount of MoS2 and metal oxide (SnO2) through hydrothermal method, a SnO2/MoS2 sensor showed improved response at low SO2 concentration. The enhanced sensing characteristics of the sensor were discussed based on the depletion layer and SnO2/MoS2 heterojunction.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(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)