Article
Chemistry, Analytical
Guillem Domenech-Gil, Jordi Sama, Cristian Fabrega, Isabel Gracia, Carles Cane, Sven Barth, Albert Romano-Rodriguez
Summary: We present a methodology for localized growth of nanowires on micro-hotplates that allows independent adjustment of the device's resistance and gas response. Fabrication of nanowire-containing stripes with or without gaps enables nanowires to bridge current, and we demonstrate this approach with SnO2 nanowire-based chemoresistors. The results show the capability of tailoring nanowire stripe sizes and empty areas along the sensing material, resulting in up to 500 times response increase. The absence of nucleation seeds in the gap areas restricts current flow along the nanowire bridges, enhancing surface conduction controlled by nanowire-gas interaction.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Jun Min Suh, Tae Hyung Lee, Kootak Hong, Young Geun Song, Sung Hwan Cho, Chong-Yun Kang, Young-Seok Shim, Donghwa Lee, Ki Chang Kwon, Ho Won Jang
Summary: The heterostructure between two-dimensional metal sulfides and metal oxides is an effective strategy to enhance the gas sensing performance. This study focuses on enhancing gas sensing response under highly humid conditions by using 2D tin sulfides-SnO2 heterostructures in the form of vertically aligned 1D nanostructures. The results show superior gas response and recovery to NO2 under high humidity, as well as diverse selectivity towards various gases using noble metal catalyst decoration.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Environmental
Pil Gyu Choi, Akihiro Tsuruta, Yoshitake Masuda
Summary: Detection and discrimination of gases are crucial in various fields and the demand for easy and fast detection of various gas substances is increasing. This study improved the sensing property by modifying carbon nanotubes (CNT) with nanosheet-type tin oxide (SnO2), resulting in superior sensing properties and improved selectivity for ammonia gas. The accuracy of ammonia gas classification was significantly increased when using the modified sensor in the sensor array, showing its potential for ammonia gas detection and discrimination.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Bharat Tandon, Stephen L. Gibbs, Christopher Dean, Delia J. Milliron
Summary: Electron transfer to and from metal oxide nanocrystals can modulate their infrared localized surface plasmon resonance (LSPR), leading to dynamic optical applications. By synthesizing and reducing dopant-segregated Sn-doped In2O3 nanocrystals, researchers discovered that core-doped nanocrystals exhibit large LSPR shifts and near-field enhancement (NFE) changes during chemical titration, enabling broad LSPR energy modulation and peak extinction changes. Simulations showed that the evolution of the LSPR spectra is a result of raising the surface Fermi level and increasing the donor defect density in the shell region. These findings demonstrate the usefulness of dopant segregation in engineering dynamic optical modulation in plasmonic semiconductor nanocrystal heterostructures beyond traditional plasmonic metals.
Article
Chemistry, Analytical
Xukun Wang, Wenjian Zhang, Xijuan Li, Xinyi Sui, Guo Liu, Bingsheng Li, Jinyuan Zhou, Erqing Xie, Zhenxing Zhang
Summary: In this study, a p-type nickel oxide foam/n-type tin-doped indium oxide nanowires composite was fabricated for ethylene glycol gas sensing, which showed a unique response to 100 ppm ethylene glycol at a low temperature of 125 degrees C, along with fast response/recovery time. The excellent gas-sensitive performance of the composite can be attributed to the formation of p/n heterojunctions and the In and Sn doping of NiO during ITO growth. This fabrication method provides an effective strategy for building NiO-based heterostructures for high-performance gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Engineering, Electrical & Electronic
Golezar Gilanizadehdizaj, Kean C. Aw, Jonathan Stringer, Debes Bhattacharyya
Summary: Electronic skins, with flexible pressure sensors as an essential component, have attracted significant interest due to their broad applications in daily lives. This study reports on the fabrication of flexible piezo-resistive pressure sensor arrays using reduced graphene oxide on flexible PCB, demonstrating excellent mechanical stability, high sensitivity, and a wide working range of pressure. The research findings provide important technological foundations for achieving high-performance electronic skins.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Analytical
Yoshitake Masuda
Summary: This review focuses on tin oxide nanomaterials, which are actively researched as semiconductor-type gas sensors. The development and applications of novel tin oxide nanomaterials in the past decade are discussed, with a focus on how dimensions and morphology affect sensing performance. The dendritic structure formed by 2D nanosheets connected by crystal growth points towards future sensor development, while the high gas adsorption performance and reactivity of metastable crystal planes provide guidance for future sensor development.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Run-Hui Wang, Wei Wen, Shilie Zheng, Zhizhen Ye, Jin-Ming Wu
Summary: In this study, a layered mesoporous aggregate of tin oxide nanocrystals with high specific surface area and mesoporous structure was synthesized. The tin oxide showed high ethanol sensing performance at low temperatures, with high selectivity and stability. The ethanol sensing mechanism changed with increasing operating temperature.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Jihao Bai, Chengming Sui, Yuanzhen Liu, Fengmin Liu, Peng Sun, Geyu Lu
Summary: Compared with single metals, alloy nanocrystals (NCs) usually exhibit novel properties and are emerging in gas sensor field. PdCu NCs uniformly dispersed on W18O49 nanowire array were synthesized and used for hydrogen detection. The MEMS-based PdCu-W18O49 gas sensor showed excellent selectivity and responsiveness to hydrogen at low operating temperature. This work is significant for hydrogen detection and has potential in monitoring hydrogen leakage.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Sevda Saritas
Summary: Fe2-xSnxO3 structures were grown using RF-DC magnetron co-sputtering. The band gap, morphology, and structural features of the film were studied, revealing their influence on the gas sensor response.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Dipyaman Mohanta, Abhinandan Mahanta, Soumya Ranjan Mishra, Sk Jasimuddin, Md Ahmaruzzaman
Summary: A novel synthetic strategy was proposed to prepare engineered SnO2@ZIF-8/gC3N4 nanohybrids for electrochemical sensing of p-nitrophenol (p-NP). The developed nanohybrid sensor exhibited excellent electrochemical performance with a detection limit of 0.565 μM and a sensitivity of 2.63 μAcm-2 μM-1. Additionally, the sensor showed remarkable selectivity in the presence of common interferents and consistent sensing response for up to 30 days.
ENVIRONMENTAL RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Wan Jae Dong, Won Seok Cho, Jong-Lam Lee
Summary: The study introduces a photorechargeable supercapacitor that can convert solar energy into chemical energy and store it effectively. The supercapacitor, composed of indium tin oxide branched nanowires and semiconducting polymers, demonstrates high performance and promising applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Chunbo Duan, Zhe Li, Jing Zhang, Chunmiao Han, Hui Xu
Summary: The synergy between blue and yellow TADF dopants is crucial for achieving high-performance TADF WOLEDs. The complementary effect enhances emission efficiency and mitigates emission quenching.
Article
Chemistry, Analytical
Kuo Zhan, Peng Qin, Yunzhe Jiang, Yunlin Chen, Lars Heinke
Summary: A sensor array based on SURMOF inverse opal films has been developed for reliable detection and discrimination of different volatile organic compounds, including various alcohols. The sensor array has a low limit of detection (10-60 ppm range) and can reliably discriminate between different alcohols. This SURMOF-based sensor array offers great potential for precise and cost-efficient detection of various analytes.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Shixiang Zhou, Li Yao, Hui Mei, Konstantinos G. Dassios, Laifei Cheng, Litong Zhang
Summary: Chiral-rotating gas sensing structures composed of chemiresistive-sensitized SiCuOC have been proposed to reduce thermal expansion of gas sensors at high temperatures. The structures disperse thermal stress by heat-induced torsion, maintaining dimensional stability. The synergistic sensitization effect of the substrate and surface sensing layer results in high response/recovery speed and value, with long-term detection maintained. The structures exhibit low thermal expansion coefficient, high deformation resistance, and can perform gas detection under pressure and thermal loading.
CHEMISTRY OF MATERIALS
(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)