Article
Materials Science, Ceramics
Hongfei Liu, Chenjun Zhang, Zhiping Zhang, Xiangdong Meng, Xianghua Zeng
Summary: Orthorhombic Sc2Mo3O12 films were successfully prepared via spin coating technique followed by annealing at 500-750 degrees C. The crystallinity of the films improved with higher post-annealing temperatures, demonstrating stable negative thermal expansion properties. The coefficients of thermal expansion in different directions were also determined, showing the overall shrinkage and expansion of the thin film.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Mohini Panday, Gaurav K. Upadhyay, L. P. Purohit
Summary: Antimony-doped SnO2 thin films were prepared and tested as gas and humidity sensors. The results showed that the doping of antimony can significantly affect the optical and electrical properties of the films, leading to excellent sensing response at different temperatures and humidities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Ksh Priyalakshmi Devi, Pranab Goswami, Harsh Chaturvedi
Summary: Although TiO2 is a popular semiconductor photocatalyst, its efficiency for solar energy conversion is limited due to its large bandgap. This paper introduces a cost-effective Sol-Gel technique using spin coating technology to fabricate nanocrystalline TiO2 thin films. The authors managed to achieve a dopant-free pure anatase nanocrystalline TiO2 thin film with a low band gap. Thorough investigations on the film's structure, optical characteristics, and surface morphology were conducted and presented.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Hao Li, Jiawei Wang, Ziwei You, Yuxi Yu, Pai Li, Liwei Xiong, Yunbin He
Summary: Nb-doped VO2 films were synthesized to enhance thermal sensing abilities, with the thermal hysteresis and resistivity decreasing while the transition temperature range widened as doping content increased. The strategy of Nb doping in VO2 showed promising results for thermal-sensing applications.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Multidisciplinary
Tiankun Wang, Sha Shiong Ng, Way Foong Lim, Hock Jin Quah, Muhammad Fadhirul Izwan Bin Abdul Malik, Wei Sea Chang
Summary: High-contrast green luminescence was achieved in molybdenum (Mo)-doped beta-phase gallium oxide (/3-Ga2O3) through sol-gel spin coating. The doping did not significantly alter the crystal structure, surface morphology, and energy bandgap of the films. The Mo-doped films exhibited a beta phase structure with smooth surface morphology, and the luminescence changed from blue to green, with improved contrast.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Sabhya, Akshayakumar Kompa, Dhananjaya Kekuda, M. S. Murari, K. Mohan Rao
Summary: This study investigates HfO2 thin films synthesized from various precursor concentrations using sol-gel processed spin coating method. It was found that films with 0.1 M Hf sol-concentration exhibited larger grain size and better crystallinity. Optical studies revealed the transparency of the films in the wavelength range of 300-1100 nm. Surface morphology studies showed low roughness values and fine spherical grains.
Article
Physics, Condensed Matter
Akshay Surani, Davit Dhruv, Divyarajsinh Zala, D. K. Chudasama, Kush Vachhani, Faizal Mirza, Himanshu Dadhich, P. S. Solanki, N. A. Shah, A. D. Joshi
Summary: In this study, the structural, microstructural, dielectric and impedance properties of low cost Bi0.85La0.15FeO3 thin film grown on FTO glass substrate were investigated. The growth of the film was confirmed by XRD analysis, and surface morphology was examined using scanning probe method. The results showed that the film exhibited complex magnetic field dependent dielectric behavior, indicating the presence of magnetoelectric coupling between spin and lattice.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Raphael D. C. Balboni, Camila M. Cholant, Luana U. Kruger, Elton A. Moura, Guilherme K. Maron, Wladimir H. Flores, André Gundel, Darci A. Gatto, Agnieszka Pawlicka, Cesar A. O. Avellaneda, Robson Andreazza
Summary: Thin films of cerium dioxide and cerium dioxide doped with vanadium pentoxide were prepared as smart materials using a sol-gel route and spin coating deposition. Weathering processes and temperature effects were studied, showing that doping reduced degradation, increased resistance of the film with temperature, and enhanced charge insertion capacity at higher temperatures.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Materials Science, Ceramics
Yuxia Zhu, Xiangqian Xiu, Fei Cheng, Yuewen Li, Zili Xie, Tao Tao, Peng Chen, Bin Liu, Rong Zhang, You-Dou Zheng
Summary: Beta-Ga2O3 thin films have been successfully prepared on (0001) sapphire substrate using a simple and effective sol-gel spin-coating method with post-annealing process. The films exhibit good crystallinity and smooth surface morphology, comparable or even better than other epitaxial methods. The single-domain-growth mode of beta-Ga2O3 thin film prepared on slightly off-angled (0001) sapphire substrate has been confirmed, showing potential applications in high-quality free-standing GaN substrates.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Bogdan Alexandru Sava, Ana Violeta Filip, Lucica Boroica, Mihai Eftimie, Marius Catalin Dinca, Andrei Soroaia, Alexandra Maria Isabel Trefilov, Mihaela Filipescu, Simona Brajnicov, Antoniu Moldovan, Ana-Maria Iordache, Mihail Elisa
Summary: A new composite glass was obtained by sol-gel method, with specific composition suitable for various applications such as magneto-optical devices and laser mirrors. Different deposition speeds and layers can affect the uniformity and roughness of the thin films.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Condensed Matter
Harish Sharma Akkera, Peddavarapu Sivakumar, Yugandhar Bitla, Ganesh Vanga, Nagaiah Kambhala, C. S. Naveen, T. Ranjeth Kumar Reddy, G. Srinivas Reddy
Summary: Different concentrations of Bi doped SnO2 thin films were synthesized using the sol-gel spin coating method. The films exhibited polycrystalline tetragonal rutile structure with good transmittance and optical properties.
PHYSICA B-CONDENSED MATTER
(2022)
Review
Materials Science, Multidisciplinary
Ankit Kumar, Gaurav Gupta, Komal Bapna, D. D. Shivagan
Summary: This review presents humidity sensors based on semiconductor metal oxide (SMO) nanostructures and their composites, discussing their sensing characteristics, humidity generation methods, sensing mechanism, and the influence of material engineering. The review also explores the challenges and future developments of these sensors.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Optics
A. A. M. Farag, M. I. Mohammed, V. Ganesh, H. Elhosiny Ali, A. M. Aboraia, Yasmin Khairy, H. H. Hegazy, V. Butova, Alexander V. Soldatov, H. Algarni, H. Y. Zahran, I. S. Yahia
Summary: A low-cost and high-operational sol-gel spin coating technique was used to prepare undoped and various Europium (Er)-doped CdO films. X-ray diffraction revealed polycrystalline nature with preferred orientations of (111) and (200). The mean crystallite size increased from 20.95 to 49.37 nm with increasing Eu-dopant content. Atomic force microscopy images showed deteriorated granular distribution homogeneity with Eu-content. The optical band gaps increased from 2.2 to 2.46 eV with Eu-doping.
Article
Chemistry, Physical
Valentina Trovato, Eti Teblum, Yulia Kostikov, Andrea Pedrana, Valerio Re, Gilbert Daniel Nessim, Giuseppe Rosace
Summary: A novel method is proposed to turn insulating cotton fabrics into electrically conductive materials by depositing VACNT, with shorter VACNT-based composite showing the best electrical conductivity. The developed e-textiles are suitable for application as humidity sensing smart textiles, demonstrating adequate response time and repeatability for end-users.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Gokhan Algun, Namik Akcay, Halim Onur Oztel, Musa Mutlu Can
Summary: This study investigates the effect of strontium (Sr) concentration on the ultrafast humidity sensing performance of Sr doped zinc oxide (SrxZn1-xO) nanostructured thin films. The films were synthesized using the sol gel method with varying Sr concentrations. The results showed that the SrxZn1-xO films had a hexagonal wurtzite structure, and the preferential orientation changed with Sr doping. The films exhibited high sensitivity, stability, and fast response and recovery times, with Sr0.10Zn0.90O being the best sample in terms of humidity sensitivity and response and recovery times. This study highlights the potential of SrxZn1-xO nanostructured thin films for high-performance humidity sensor applications.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
M. Velumani, S. R. Meher, Z. C. Alex
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2018)
Article
Materials Science, Multidisciplinary
Charanya Sukumaran, Venkateswaran Vivekananthan, Velumani Mohan, Zachariah C. Alex, Arunkumar Chandrasekhar, Sang-Jae Kim
APPLIED MATERIALS TODAY
(2020)
Article
Chemistry, Analytical
A. Prasanth, Selamawit Getachew, Tseganesh Shewa, M. Velumani, S. R. Meher, Z. C. Alex
Summary: This study developed two sets of fiber optic sensors for detecting acetone concentrations, using SnO2 thin film and a bilayer of SnO2/MoS2 as the sensing layers. The SnO2/MoS2-coated sensor showed enhanced response and recovery time, indicating its potential for creating a handheld sensor system for monitoring diabetes.
Review
Materials Science, Multidisciplinary
Mohan Velumani, Asokan Prasanth, Subramaniyam Narasimman, Arunkumar Chandrasekhar, Abraham Sampson, Samir Ranjan Meher, Sivacoumar Rajalingam, Elizabeth Rufus, Zachariah C. Alex
Summary: The quantification of gases in breath has gained attention as a non-invasive and painless method for early detection of physiological disorders. Nanomaterial-based sensors show promise in identifying volatile organic compounds associated with diseases. This review provides details about biomarkers in exhaled breath, sensor technologies, and discusses the challenges of sensor characteristics.
Proceedings Paper
Physics, Applied
M. Velumani, S. R. Meher, L. Balakrishnan, R. Sivacoumar, Z. C. Alex
DAE SOLID STATE PHYSICS SYMPOSIUM 2015
(2016)
Proceedings Paper
Engineering, Electrical & Electronic
B. Karthikeyan, M. Velumani, R. Kumar, Srinivasa Rao Inabathini
2015 2ND INTERNATIONAL CONFERENCE ON ELECTRONICS AND COMMUNICATION SYSTEMS (ICECS)
(2015)
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)