Article
Chemistry, Inorganic & Nuclear
Amruta B. Nagare, Namdev S. Harale, Suprimkumar D. Dhas, Umesh V. Shembade, Suhas R. Ghatage, Pramod S. Patil, Annasaheb V. Moholkar
Summary: Nanogranular polypyrrole (PPy) thin films were successfully synthesized by in-situ oxidative polymerization and drop casting method. The films exhibited agglomerated granular-like morphology with high roughness. The optimized PPy thin film gas sensor showed excellent response and stability towards NO2 gas even at low concentrations.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Neetika, Arvind Kumar, Ramesh Chandra, V. K. Malik
Summary: MoS2 thin films of different thicknesses were deposited using direct current magnetron sputtering and utilized as gas sensors without additional processing. The change in morphology from nanoparticle to nanoworm structures in MoS2 thin films resulted in an increased NO2 sensing response, demonstrating the potential application of MoS2 nanostructures for a highly sensitive gas sensor.
Article
Chemistry, Multidisciplinary
Merel J. Lefferts, Ben Armitage, Krishnan Murugappan, Martin R. Castell
Summary: This study demonstrates the use of PEDOT conducting polymer percolation networks for sensitive and reversible NO2 sensing. By adjusting the polymerization and doping conditions, control over sensing behavior is achieved, resulting in reversible NO2 sensors with higher sensitivity compared to traditional thin film sensors. A detection limit of 907 +/- 102 ppb was achieved.
Article
Chemistry, Analytical
Enza Panzardi, Nicola Calisi, Nicoleta Enea, Ada Fort, Marco Mugnaini, Valerio Vignoli, Anna Vinattieri, Mara Bruzzi
Summary: The response of resistive In2O3-x sensing devices to different concentrations of NO2 under various operative conditions was investigated. The sensing layers were 150 nm thick films manufactured by oxygen-free room temperature magnetron sputtering deposition, which allowed for easy and fast manufacturing process while providing advantages in terms of gas sensing performances. The oxygen deficiency during growth created high densities of oxygen vacancies that facilitated NO2 absorption reactions on the surface and acted as donors in the bulk. The sensor exhibited a baseline resistance of kilohms and showed remarkable performances in terms of gas sensitivity.
Article
Chemistry, Analytical
Sunil Babu Eadi, Hyun-jin Shin, Kim Thanh Nguyen, Ki-Woo Song, Hyun-Woong Choi, Seong-Hyun Kim, Hi-Doek Lee
Summary: In this study, IGZO thin films were prepared in a N-2 environment by varying the annealing pressure and tested for NO2 gas detection. The results showed that increasing the annealing pressure led to superior sensor response and decreased recovery time. The IGZO thin film annealed at 400 degrees C at 3 atm exhibited excellent selectivity to various gases and long-term stability.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Manreet Kaur Sohal, Aman Mahajan, Sahil Gasso, R. K. Bedi, Ravi Chand Singh, A. K. Debnath, D. K. Aswal
Summary: In this study, yttrium-incorporated tin oxide thin film gas sensors were developed for sub-ppb level detection of NO2 at room temperature, showing high sensing response, selectivity, and stability, while being insensitive to humidity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Yuan-Chang Liang, Yu-Wei Hsu
Summary: In this study, a two-layered thin-film structure consisting of a dispersed nanoscaled Ag2O phase and SnO2 layer (SA) and a mono-composite film layer (CSA) consisting of a nanoscale Ag2O phase in the SnO2 matrix were designed and fabricated for NO2 gas sensor applications. Both SA and CSA thin films exhibited enhanced gas-sensing responses toward low-concentration NO2 gas.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Chemistry, Analytical
Wenlong Yang, Chengjiu Zhao, Bingsheng Du, Rong Wu, Xiaofang Lai, Yong He, Jikang Jian
Summary: A high-performance room temperature NO2 gas sensor based on tin selenide nanosheet arrays films has been developed, which can quickly respond to different concentrations and has high selectivity and repeatability.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Electrical & Electronic
Maloy Das, Amit Kumar Shringi, Mahesh Kumar
Summary: Metal oxide-based thin-film sensors have been widely studied and commercialized for gas sensing applications, but they suffer from poor sensing response and high-temperature operation. In this study, a MoS2 decorated alpha-Fe2O3 thin-film-based gas sensor was demonstrated, which showed improved response and high sensitivity and selectivity towards NO2 gas.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
Necmettin Kilinc, Senem Sanduvac, Mustafa Erkovan
Summary: Platinum-nickel alloy thin films deposited on a glass substrate by sputter technique exhibit good hydrogen sensing properties, with the Pt-79-Ni-21 alloy thin film showing the best performance across all temperature ranges. The detection limit for Pt and Pt-Ni alloy thin films is below 1 ppm, and the response times decrease with increasing H-2 concentration and temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Kailasa S. Ganapathi, Manmeet Kaur, M. Shaheera, Ankita Pathak, S. C. Gadkari, A. K. Debnath
Summary: This study utilized SILAR technique to prepare pristine ZnO thin films for highly sensitive, selective, and rapid detection of sub-ppm level NO2. The synthesized films exhibited high sensitivity and selectivity to NO2 with fast response and recovery times. XPS studies revealed interactions of NO2 with both adsorbed and lattice oxygen, while optical studies confirmed the existence of defects in the ZnO films contributing to their superior sensor response.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Jyoti Jaiswal, Abhijeet Das, Vivek Chetry, Sanjeev Kumar, Ramesh Chandra
Summary: This study presents room temperature operable ultrasensitive NO2 gas sensors fabricated from vertically aligned crystalline MoSe2 porous nanowall thin films, showing excellent sensing characteristics including high sensor response rate, fast response/recovery time, and high stability at room temperature.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Nanoscience & Nanotechnology
Mameaseng Siriwalai, Matawee Punginsang, Kanittha Inyawilert, Anurat Wisitsoraat, Adisorn Tuantranont, Chaikarn Liewhiran
Summary: In this study, flame-made La2O3-loaded WO3 nanoparticle films were investigated for NO2 detection. The addition of La2O3 nanoparticles to WO3 sensors resulted in high response and selectivity towards NO2 at low working temperatures. The optimal parameters for the film preparation were determined to be 0.2 wt % La content and three spin coating cycles.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
M. M. Gomaa, M. H. Sayed, V. L. Patil, M. Boshta, P. S. Patil
Summary: This study successfully obtained nickel oxide thin films using a cost-effective chemical spray pyrolysis approach, which showed a polycrystalline cubic structure. The optical transmittance decreased with increasing deposition time, and the highest sensitivity for NO2 detection was found in the NiO thin film deposited for 5 minutes, demonstrating good stability and selectivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Hongyin Pan, Chen Yang, Wei Zheng, Xianghong Liu, Yong Wan, Jun Zhang
Summary: A gas sensor based on porous Co3O4 thin films decorated by dual Pt/Rh catalysts is demonstrated for efficient NO2 detection in humid environment. The sensor exhibits high response and moisture resistance due to the three-dimensional ordered microstructure of the Co3O4 thin films and the loading of Pt/Rh catalysts by atom layer deposition (ALD). With optimized ALD Pt and Rh thickness, the sensor shows fast response/recovery speed, a low detection limit and the capability to operate under high humidity.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Ceramics
Pratyay Amrit, Surbhi Jain, Monika Tomar, Vinay Gupta, Bhawana Joshi
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2020)
Article
Materials Science, Composites
Nisha Gill, Vinay Gupta, Monika Tomar, Amit L. Sharma, O. P. Pandey, Dwijendra P. Singh
COMPOSITES SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Electrical & Electronic
Pragati Kumar, Nupur Saxena, Vinay Gupta
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
Article
Chemistry, Physical
Sujit Kumar, Anjali Sharma, Yen Teng Ho, Akhilesh Pandey, Monika Tomar, A. K. Kapoor, Edward Yi Chang, Vinay Gupta
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Energy & Fuels
Shiva Lamichhane, Savita Sharma, Monika Tomar, Ashok Kumar, Vinay Gupta
JOURNAL OF ENERGY STORAGE
(2020)
Article
Engineering, Electrical & Electronic
Savita Sharma, Anjali Sharma, Vinay Gupta, Nitin K. Puri, Monika Tomar
Summary: Multilayer thin film structures of BFO/BTO were prepared using chemical solution deposition and pulsed laser deposition techniques to investigate the effect on ferroelectric-photovoltaic properties. The structures showed enhanced ferroelectric and ferromagnetic properties with increasing layers. Under specific conditions, the PLD-grown multilayer BFO/BTO PV cell demonstrated higher photocurrent and light-to-electricity conversion efficiency compared to CSD-grown PV cells.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Physics, Applied
Sneha Sinha, Sujit Kumar, Sunil K. Arora, Anjali Sharma, Monika Tomar, Han-Chun Wu, Vinay Gupta
Summary: This study reports the successful growth of large-area MoS2-WS2 vdW heterostructures on oxidized Si substrates using the pulsed laser deposition technique, and the interlayer interactions between the constituent 2D layers were analyzed using Raman spectroscopy. The research demonstrates that the fabrication of vdW heterostructures using a simple and scalable direct growth method can lead to excellent photodetector performance.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Sujit Kumar, Anjali Sharma, Monika Tomar, Vinay Gupta
Summary: Molybdenum disulfide (MoS2) layers were successfully grown and optimized for low power thin film transistors (TFTs) using pulsed laser deposition (PLD) technique. Among different metal systems, Au/Ag bilayer was found to be the best electrode for efficient charge injection into MoS2 layers, resulting in good electrical characteristics of the fabricated transistors.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Aakash Gupta, Sujit Kumar, Kajal Jindal, Anjali Sharma, Monika Tomar
Summary: Innovative material configurations incorporating MoS2 layers with Fe doped ZnO thin films exhibit high thermoelectric properties at lower temperatures due to the low dimensionality of MoS2 enhancing the thermoelectric power factor. Multilayered structures of MoS2 and Fe:ZnO samples display higher power factor and figure of merit values at a very low operating temperature of 300 K, indicating promising practical applications.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Sujit Kumar, Anjali Sharma, Vinay Gupta, Monika Tomar
Summary: In this study, the capability of two-dimensional material MoS2 for developing efficient seawater energy harvester was investigated, resulting in the successful fabrication of hydrovoltaic nanogenerators generating voltage >7 V. The quality large area growth of MoS2 monolayer using pulsed laser deposition technique was confirmed, and the unintentional doping of MoS2 provided by underlying substrates was found to be crucial for enhancing power generation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Aakash Gupta, Shweta Sharma, Reema Gupta, Anjali Sharma, Monika Tomar
Summary: The exploitation of the non-linear optical property of potassium sodium niobate (KNN-50) thin film using an external electric field has been demonstrated. The study prepared KNN-50 thin film on a fused quartz substrate, confirming the formation of perovskite phase and densely packed micro-structured film. The band gap of the thin film was found to be 4.1 eV, showing promise for electric field assisted nonlinear optical studies and potential application in nonlinear optical devices.
Article
Biophysics
Surbhi Jain, Ayushi Paliwal, Vinay Gupta, Monika Tomar
BIOSENSORS & BIOELECTRONICS
(2020)
Article
Chemistry, Multidisciplinary
Shiva Lamichhane, Savita Sharma, Monika Tomar, Vinay Gupta
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2020)
Proceedings Paper
Physics, Applied
Shiva Lamichhane, Savita Sharma, Monika Tomar, Vinay Gupta
3RD INTERNATIONAL CONFERENCE ON CONDENSED MATTER & APPLIED PHYSICS (ICC-2019)
(2020)
Article
Engineering, Electrical & Electronic
Rakesh Saini, Anil Kumar, Geeta Bhatt, Avinashi Kapoor, Ayushi Paliwal, Monika Tomar, Vinay Gupta
IEEE SENSORS JOURNAL
(2020)
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)
