Article
Chemistry, Analytical
Junfeng Chao, Zhendong Liu, Shumin Xing, Qianqian Gao, Jianzhou Zhao
Summary: Square-like tungsten oxide submicron materials were successfully synthesized via a simple hydrothermal route, with controlled morphology, size, and crystal structure. Tungsten trioxide sensors showed excellent responses to ammonia, while Pt-loaded square-like WO3 significantly improved the responses, particularly at 1 wt% Pt mass content.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Nanoscience & Nanotechnology
Jiyang Zeng, Qian Rong, Bin Xiao, Baoye Zi, Xinya Kuang, Xiyu Deng, Yiwen Ma, Zhenlin Song, Genlin Zhang, Jin Zhang, Qingju Liu
Summary: A ppb-level TEA gas sensor based on Co3O4/WO3 p-n heterojunction was reported, showing excellent sensing performance and selectivity with linear response to TEA concentration. Experimental results indicated a detection limit of 0.6 ppb, with Co3O4 improving electron separation/transport efficiency and accelerating TEA oxidation rate.
Article
Chemistry, Multidisciplinary
Xueliang Fan, Cong Liu, Boxu Gao, He Li, Yahong Zhang, Hongbin Zhang, Qingsheng Gao, Xiaoming Cao, Yi Tang
Summary: In this study, a Pt/WO3 catalyst consisting of Pt species strongly coupled with defective WO3 polycrystalline nanorods was designed. The electronic structure engineering of Pt sites on WO3 could be regulated, resulting in excellent HER activity. The O vacancies of WO3 effectively mitigated the electron transfer from Pt sites to WO3 and influenced the catalytic activity.
Article
Chemistry, Physical
Hwi Je Woo, Seongchan Kim, Young-Jin Choi, Jeong Ho Cho, Seong Heon Kim, Young Jae Song
Summary: The work function of graphene devices on SiO2 substrates is studied using Kelvin probe force microscopy, revealing gate voltage-dependent work-function hysteresis. The inhomogeneous distribution of chemical species at the graphene/SiO2 interface leads to varying degrees of hysteresis across different positions on the graphene.
Article
Chemistry, Analytical
G. Mineo, K. Moulaee, G. Neri, S. Mirabella, E. Bruno
Summary: An extended experimental investigation and modeling of the interaction between WO3 and H2 were conducted, revealing two microscopic processes leading to gas detection, with quantified kinetic barriers. The chemo-resistive effect of H2 sensing by WO3 was explained through these processes, laying the foundation for the development of fast, sensitive, and low-temperature operating H2 sensors based on WO3.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Jinmei Tian, Bin Jiang, Hong Shao, Yuting Wang, Tianqi Wang, Feng Li, Dan Li, Ying Yang, Xiangting Dong
Summary: In this study, one-dimensional tandem heterojunctions of SnO2 @POMs@WO3 nanofibers were prepared using coaxial electrospinning, and the gas sensing performance was significantly improved compared to SnO2 @WO3 nanofibers. The optimized response to 100 ppm ethanol reached 8.8, providing a new strategy for developing high-performance gas sensors through synthesizing one-dimensional tandem heterojunctions and introducing POMs.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Shangzhi Gu, Wenyu Liu, Shuo Mi, Guoyu Xian, Jiangfeng Guo, Fei Pang, Shanshan Chen, Haitao Yang, Hong-Jun Gao, Zhihai Cheng
Summary: In this study, the twist angle-dependent work functions of twisted bilayer graphene (tBLG) were investigated using Kelvin probe force microscopy (KPFM) and Raman spectroscopy. The surface potentials of Bernal-stacked multilayer graphene were measured to determine the relationship between twist angle and surface potential. It was found that the work function of tBLG decreases and tends to saturate with increasing number of layers. Controlled annealing process showed that tBLG transforms into Bernal-stacked bilayer graphene. This research provides valuable insights into the twist angle-dependent surface potentials and electronic properties of tBLG.
Article
Biochemistry & Molecular Biology
Ryo Ishihara, Yoshihiro Makino, Yuki Yamaguchi, Kenjiro Fujimoto, Keishi Nishio
Summary: This study presents the use of transparent and flexible Pt/WO3 nanoparticle-dispersed membranes as hydrogen gas leakage sensors, which exhibit sufficient color change and high transparency. The heat treatment of the particles enables rapid and sensitive response to the presence of hydrogen gas. The optimized membrane can detect hydrogen gas concentration as low as 0.4% by naked eye, making it an ideal sensor for safe and easy detection of hydrogen gas leakage.
Article
Materials Science, Multidisciplinary
Valentine Saasa, Bonex Mwakikunga
Summary: In this paper, the performance of acetone sensors was improved by enhancing the surface activity, gas diffusion, and decreasing the grain size. n-type semiconducting sensors and their cobalt doped-counterparts were synthesized by a hydrothermal method. The SnO2-Co sensor showed a high sensitivity to 5 ppm acetone at an operating temperature of 100 degrees C and exhibited high selectivity. The results suggest that SnO2-Co architectures can be used for detecting low concentrations of acetone and have potential for early diabetes diagnosis.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Analytical
A. Almaev, V. Nikolaev, N. N. Yakovlev, P. N. Butenko, S. Stepanov, A. Pechnikov, M. P. Scheglov, E. Chernikov
Summary: The gas sensing properties of Pt/α-Ga2O3:Sn/Pt metal-semiconductor-metal (MSM) structures based on epitaxial films of α-Ga2O3 with Pt contacts were investigated. The structures showed high sensitivity to H-2, and it was found that the Pt contacts and Sn doping level played a key role in determining the hydrogen sensing properties. The sensitivity to H-2 was attributed to the modulation of the Schottky barrier height between Pt and α-Ga2O3:Sn.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Paulo Morais, Pedro H. Suman, Ranilson A. Silva, Marcelo O. Orlandi
Summary: The study evaluated the influence of heating rate on WO3 nanofibers and found that continuous nanofibers were obtained at 500 degrees C. WO3 nanofibers calcined at 10 degrees C/min showed high sensor signal and excellent selectivity, making them an attractive sensing material for detecting low and high NO2 concentrations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Igor A. Nechepurenko, Daria P. Kulikova, Vladimir V. Kornienko, Konstantin N. Afanasiev, Landzhik A. Shekoyan, Alexander V. Baryshev, Alexander V. Dorofeenko
Summary: The proposed method analyzes the time evolution of reflection spectra to determine the complex dielectric permittivity dynamics in gasochromic oxides, as well as to estimate the diffusion coefficient in gasochromic oxide layers. Experimental results demonstrated the effectiveness of this method in hydrogen-sensitive trilayers, with response times and detection limits achieved for hydrogen concentrations. The study emphasizes the importance of retrieving the dielectric permittivity dynamics of WO3 for accurately evaluating response times in gasochromic nanostructures.
Article
Materials Science, Ceramics
Zichen Zheng, Kewei Liu, Yiwen Zhou, Marc Debliquy, Chao Zhang
Summary: Geranyl acetone plays a crucial role as a volatile organic compound (VOC) biomarker in food quality assessment, but the detection of its ultralow concentrations has been understudied. In this study, an iron (Fe)-doped WO3-x gas sensor was used for sensitive and selective geranyl acetone detection. The results showed enhanced sensitivity, low limit of detection, optimal selectivity, and outstanding stability. The study also demonstrated the practical application of the sensor for evaluating spoiled cooked rice, ensuring food security and improving palatability.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Chemistry, Multidisciplinary
Zicheng Zheng, Nan Jiang, Rong Liang, Hanwen Chi, Jingmin Wu, Jie Jiang, Zhizhen Ye, Liping Zhu
Summary: Pt-decorated In2O3 hollow microspheres were prepared using a template and reflux method, with the Pt decoration significantly enhancing the response of the In2O3-based sensor towards acetone. The addition of Pt led to an increase in specific surface area and the availability of active sites for the target gas, resulting in alterations to the energy band structure. The proposed sensor has high sensitivity and can detect low concentrations of acetone, making it suitable for applications such as monitoring dietary intake, managing diabetes, and inspecting industrial processes.
Article
Materials Science, Multidisciplinary
Chaitanya Mahajan, Vahid Hasannaeimi, Mayur Pole, Elizabeth Kautz, Bharat Gwalani, Sundeep Mukherjee
Summary: The effect of chemistry change on corrosion mechanisms and passive film characteristics of model Ni-P and Co-P metallic glass coatings on mild steel was investigated. Increasing phosphorus content enhanced corrosion resistance, with the presence of hypophosphite and phosphate anions observed on the corroded surfaces. Enrichment of phosphorus in the passive layer facilitated the restoration of the protective hypophosphite anion layer during dissolution. A correlation between electronic structure and corrosion resistance was established, as the relative work function increased with higher phosphorus content.
Article
Chemistry, Physical
Marta Fiedot-Tobola, Magdalena Ciesielska, Irena Maliszewska, Olga Rac-Rumijowska, Patrycja Suchorska-Wozniak, Helena Teterycz, Marek Bryjak
Article
Chemistry, Analytical
Marta Fiedot-Tobola, Patrycja Suchorska-Wozniak, Kamila Startek, Olga Rac-Rumijowska, Rafal Szukiewicz, Monika Kwoka, Helena Teterycz
Article
Chemistry, Multidisciplinary
Maciej Krawczyk, Patrycja Suchorska-Wozniak, Rafal Szukiewicz, Maciej Kuchowicz, Ryszard Korbutowicz, Helena Teterycz
Summary: Gas sensitive structures made of nanowires have large specific surface area and chemically active centers for sensitive gas sensor applications. Monoclinic beta-Ga2O3 nanowires were synthesized from metallic gallium in the presence of nitrogen and water vapor at atmospheric pressure. The gas sensor based on these nanowires shows high sensitivity to ethanol and acetone.
Article
Chemistry, Analytical
Maciej Krawczyk, Ryszard Korbutowicz, Rafal Szukiewicz, Patrycja Suchorska-Wozniak, Maciej Kuchowicz, Helena Teterycz
Summary: In this study, a beta-Ga2O3 epitaxial layer with a highly developed surface was synthesized on gold electrodes on a Al2O3 substrate, and impregnated with gold nanoparticles to achieve p-type doping. The introduction of the Au nanoparticles led to an increase in conductivity and a reversal of the electric response to air containing DMS.
Article
Chemistry, Physical
Olga Rac-Rumijowska, Helena Teterycz
Summary: This paper presents the mechanism of electrical conductivity in nanocomposite polyacrylonitrile (PAN) fibers modified with silver nanoparticles (AgNPs). The structure of the nanocomposite fibers was determined using SEM, TEM, and XRD, and the electrical properties were determined using the DC and AC methods. The conductivity of the fibers was electronic and based on the percolation theory with tunneling through the polymer phase.
Article
Computer Science, Information Systems
Iwona Karbownik, Olga Rac-Rumijowska, Tomasz Rybicki, Patrycja Suchorska-Wozniak, Helena Teterycz
Summary: The article investigates the influence of temperature on the electrical conductivity of PAN/PANI composite fibers, finding the conductance changes follow a parabolic shape as temperature varies.
Proceedings Paper
Engineering, Electrical & Electronic
Olga Rac-Rumijowska, Marta Fiedot-Tobola, Iwona Karbownik, Helena Teterycz
2018 41ST INTERNATIONAL SPRING SEMINAR ON ELECTRONICS TECHNOLOGY (ISSE)
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
Olga Rac-Rumijowska, Marta Fiedot, Patrycja Suchorska-Wozniak, Helena Teterycz
2017 40TH INTERNATIONAL SPRING SEMINAR ON ELECTRONICS TECHNOLOGY (ISSE)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Marta Fiedot, Olga Rac-Rumijowska, Patrycja Suchorska-Wozniak, Helena Teterycz
2017 40TH INTERNATIONAL SPRING SEMINAR ON ELECTRONICS TECHNOLOGY (ISSE)
(2017)
Article
Materials Science, Paper & Wood
Olga Rac-Rumijowska, Marta Fiedot, Iwona Karbownik, Patrycja Suchorska-Wozniak, Helena Teterycz
Article
Chemistry, Physical
Marta Fiedot, Irena Maliszewska, Olga Rac-Rumijowska, Patrycja Suchorska-Wozniak, Agnieszka Lewinska, Helena Teterycz
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)
