Article
Chemistry, Analytical
Jiri Kroutil, Alexandr Laposa, Vojtech Povolny, Ladislav Klimsa, Miroslav Husak
Summary: This study presents the design of a polymer-film-based gas detection sensor using different types of polyaniline as active layers. The resistive sensors with PANI layers have the advantages of easy preparation and low production cost. The polymer films exhibit high sensitivity to gas concentrations at room temperature. The developed sensor works based on the principle of electrical resistance shifting with gas concentration. Three different polymerization solutions are used to synthesize the PANI active layers, and the PANI layers polymerized in acetic acid solutions show good sensitivity towards ammonia.
Article
Chemistry, Multidisciplinary
Nhat Xuan An Nguyen, Le Viet Hai, Thi Kim Ngan Nguyen, Thi Nam Pham, Thi Thom Nguyen, Le Thanh Nguyen Huynh, Van Viet Pham, Thi Thu Trang Nguyen, Nguyen Thai Hoang, Tran Dai Lam
Summary: Graphene sheets decorated with nickel or copper oxides anchored on polyaniline were prepared and utilized as sensors for methanol detection, showing excellent selectivity and sensitivity. This novel sensor has the potential to effectively distinguish methanol from other alcohols, offering promising applications in detecting methanol adulteration in beverages.
Article
Chemistry, Physical
R. Souissi, N. Bouguila, M. Bendahan, K. Aguir, T. Fiorido, M. Abderrabba, I Halidou, A. Labidi
Summary: The importance of detecting ozone and its impact on human health; Gas sensors based on In2S3 films prepared have high sensitivity and low detection limits; The gas sensor at a working temperature of 160 degrees Celsius exhibits good rapidity and selectivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Srijeet Tripathy, Avik Sett, Santanab Majumder, Tarun Kanti Bhattacharyya
Summary: This study investigates the effects of gate voltage on ammonia sensing properties of carbon nanotube thin film transistors (CNT TFT). The sensitivity and detection limit of the device are found to be significantly improved under the influence of a gate field. The amplification of sensor response is attributed to the increase in adsorption energy of ammonia due to the gate field, as well as the reversible increase of contact resistance induced by ammonia exposure in the negative gate regime.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
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
Chemistry, Analytical
Edilene A. da Silva, Cedric Samuel, Leonardo N. Furini, Carlos Jose L. Constantino, Nathalie Redon, Caroline Duc
Summary: In this study, highly sensitive ammonia sensors based on acidic-doped polyaniline and polyurethane were proposed. The influence of polyurethane on the film structure and sensing performances of polyaniline was investigated by varying the mass ratios between the polymers. The results showed that the presence of polyurethane significantly enhanced the sensitivity of the sensors without interfering with the main sensing features of polyaniline. Furthermore, polyurethane mitigated the influence of humidity on the sensors and decreased the drift of the devices, increasing their lifespan.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Guanglu Lei, Zishuo Li, Guocai Lu, Jinyuan Hu, Haochuan Shang, Xiaolei Zhang, Xianghong Liu, Jun Zhang, Xiangxin Guo
Summary: Metal oxide semiconductor (MOS) thin films, especially tungsten oxide (WO3) thin films, have shown great potential as sensing layers for gas sensor devices. This study focuses on the deposition and annealing process of WO3 thin films on interdigital electrodes, and explores the impact of oxygen vacancies on sensor properties. The results indicate that the WO3 sensor annealed at 500 degrees C exhibits the best performance in detecting triethylamine (TEA), which is attributed to the enhanced adsorption of oxidative oxygen species due to the presence of abundant oxygen vacancies.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Physical
Qaisar Maqbool, Nevzat Yigit, Michael Stoeger-Pollach, Maria Letizia Ruello, Francesca Tittarelli, Guenther Rupprechter
Summary: By employing spectroscopy of working sensors, we have uncovered a new sensing mechanism that involves reversible physisorption and irreversible chemisorption of methanol, as well as surface electrochemical reactions forming CO2 and H2O resulting in electron/O-2 depletion and restoration.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Youngbo Choi, Yoonseung Lee, Surin Hong
Summary: Trace amounts of volatile organic compounds (VOCs) were detected in Au chip interfaces modified with mesoporous SiO2 nanomaterials using a surface plasmon resonance (SPR) technique. The sensors modified with specific ligands showed high sensitivity and selectivity to the target gas molecules.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Multidisciplinary
Jiahao Hu, Tao Zhang, Ying Chen, Pengcheng Xu, Dan Zheng, Xinxin Li
Summary: ZnMn2O4 nanotubes have been synthesized and utilized for CO2 detection, showing good sensing response to CO2 gas and great application potentials.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Polymer Science
Sabri Ouni, Anis Madaci, Mohamed Haouari, Naim Bel Haj Mohamed, Francois Bessueille, Abdelhamid Elaissari, Abdelhamid Errachid, Nicole Jaffrezic-Renault
Summary: The article introduces a new microconductometric transducer for the detection of methanol vapor. The sensitive part of the sensor is prepared by encapsulating zinc sulfide nanoparticles in chitosan. The sensor shows good response to methanol with lower sensitivity to ethanol and acetone, and has a detection limit of 1400 ppm in the gas phase.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Electrochemistry
Ting-Jen Hsueh, Shih-Hsien Lee
Summary: The study developed La2O3 nanoparticles using ultrasonic wave grinding technology and constructed an Au/La2O3-NPs/ZnO/MEMS SO2 gas sensor. Experimental results showed that the ZnO thin film acts as a path for electron transport, and the sensor exhibits a stronger sensitivity to SO2 gas.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Suriya Duangmanee, Yingyot Poo-arporn, Pattanaphong Janphuang, Pimchanok Leuasoongnoen, Surangrat Tonlublao, Phitsamai Kamonpha, Natawan Saengchai, Narong Chanlek, Chatree Saisombat, Pinit Kidkhunthod, Rungtiva P. Poo-arporn
Summary: In this study, a simple and facile growth method was used to fabricate vertically aligned ZnO thin films, which were then applied in methane gas sensors. The results showed a good correlation between the film structure and sensor response.
Article
Chemistry, Physical
Moonjeong Jang, Juyeon Lee, Se Yeon Park, Jiyun Lee, Kyung Min Lee, Wooseok Song, Sung Myung, Sun Sook Lee, Ha-Kyun Jung, Yun Chan Kang, Sang Kyu Kwak, Ki-Seok An
Summary: This study presents a novel method to enhance the sensing performance of ZnO thin films using a gas-selective layer, achieving effective enhancement of sensing performance under ambient conditions through intermolecular interactions between gas molecules and polymers.
APPLIED SURFACE SCIENCE
(2021)
Article
Polymer Science
Dongzi Yang, Guan Sheng, Jie Lu, Xiaoling Tong, Shuo Li, Xingyu Jiang, Liang Zhang, Jinrong Luo, Yanyan Shao, Zhou Xia, Lizhen Huang, Lifeng Chi, Yuanlong Shao
Summary: Recently, 2D conducting polymer thin films have gained attention for their ability to combine molecular aggregate ordering and in-plane charge transport. This study successfully developed wafer-size polyaniline and tetra-aniline thin films with customized surface morphology and crystallinity through controlled interfacial synthesis. The optimized polyaniline thin film exhibited an ultraflat surface and clear crystalline domains, while also demonstrating impressive ammonia sensing capability.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
G. Mathankumar, P. Bharathi, M. Krishna Mohan, S. Harish, M. Navaneethan, J. Archana, P. Suresh, G. K. Mani, P. Dhivya, S. Ponnusamy, C. Muthamizhchelvan
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2020)
Article
Telecommunications
Parvathy Arulmozhi, N. Hemavathi, J. B. B. Rayappan, Pethuru Raj
WIRELESS PERSONAL COMMUNICATIONS
(2020)
Article
Chemistry, Analytical
Parthasarathy Srinivasan, Jeyashakila Robinson, Jeyasekaran Geevaretnam, John Bosco Balaguru Rayappan
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Chemistry, Physical
Dinesh Kumar Subbiah, Apurba Das, John Bosco Balaguru Rayappan
Summary: Utilizing nanostructured materials modified cotton cellulose for developing protective fabrics with UV blocking and thermo-chromic properties is a versatile and cost-effective solution. The surface modification of cotton cellulose with hydrated non-stoichiometric tungsten oxide enhances UV blocking features and shows ligand to metal charge transfer characteristics, demonstrating potential for protective clothing applications.
APPLIED SURFACE SCIENCE
(2021)
Review
Engineering, Chemical
Selva Balasubramanian, Arockia Jayalatha Kulandaisamy, K. Jayanth Babu, Apurba Das, John Bosco Balaguru Rayappan
Summary: The paper provides a comprehensive review of the history, toxicity, and detoxification research of chemical warfare agents (CWAs), highlighting the advantages and application prospects of metal-organic frameworks (MOFs) as effective degrading agents, as well as the practical application challenges on textiles.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Review
Materials Science, Multidisciplinary
Raghavv Raghavender Suresh, Muthaiyan Lakshmanakumar, J. B. B. Arockia Jayalatha, K. S. Rajan, Swaminathan Sethuraman, Uma Maheswari Krishnan, John Bosco Balaguru Rayappan
Summary: Screen printing has gained popularity in recent times due to its versatility, economic advantages and ease of use. The technique's simplicity in equipment design and requirement of basic materials make it a preferred choice for mass production of electrodes. Optimizing parameters such as ink rheology and mesh size is crucial for achieving desired outcomes in this additive manufacturing technique.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Computer Science, Information Systems
R. Anushiadevi, Padmapriya Praveenkumar, John Bosco Balaguru Rayappan, Rengarajan Amirtharajan
Summary: The rapid development of multimedia cognitive content is shifting the global layout towards cloud-based architecture, providing massive computing storage and high computational platforms. However, there is a security risk in the public cloud environment as data owners outsource their multimedia data on hybrid cloud.
MULTIMEDIA TOOLS AND APPLICATIONS
(2021)
Article
Computer Science, Artificial Intelligence
C. Lakshmi, K. Thenmozhi, C. Venkatesan, A. Seshadhri, John Bosco Balaguru Rayappan, Rengarajan Amirtharajan
Summary: The paper discusses the growth and challenges in the field of image encryption and introduces a new encryption scheme with higher bitplane confusion to resist chosen-plaintext attacks. Neural assisted techniques are proposed as the solution to meet encryption requirements.
NEURAL PROCESSING LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Santhiya R. Devi, K. Thenmozhi, John Bosco Balaguru Rayappan, Rengarajan Amirtharajan, Padmapriya Praveenkumar
Summary: This study introduces a novel architecture based on Quantum Cellular Automata (QCA) for communication, utilizing majority gates in cross-coupled and cross-oriented structures. By optimizing the Random Key Generator and image encryption algorithm, the security of image encryption is effectively enhanced.
NANO COMMUNICATION NETWORKS
(2021)
Article
Chemistry, Physical
Madeshwari Ezhilan, Arockia J. B. B. Jayalatha, K. Jayanth Babu, John Bosco Balaguru Rayappan
Summary: Low-dimensional metal oxide nanostructures with hierarchical connections have been preferred for gas-sensing applications due to their enhanced sensing response. Hierarchical architectures of WO3 nanowires were synthesized using electrospinning technique, with X-ray diffraction and electron microscopy revealing changes in grain features with calcination temperature. X-ray photoelectron spectrometer showed higher oxidation states of tungsten and increased oxygen vacancies in samples calcined at higher temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Madeshwari Ezhilan, Arockia J. B. B. Jayalatha, John Bosco Balaguru Rayappan
Summary: V2O5 nanowires based vapor sensors were successfully fabricated using calcinated electrospun nanofibers, with different V2O5 nanowires (NC1, NC2, NC3) synthesized and characterized for their properties. The V2O5 nanowires showed high selectivity towards acetone with quick response and recovery times, indicating their potential for gas sensing applications.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Analytical
Priyannth Ramasami Sundhar Baabu, Ganesh Kumar Mani, John Bosco Balaguru Rayappan, Yuichiro Tsuyuki, Toshiyuki Inazu, Kazuyoshi Tsuchiya
Summary: Miniaturization of electrochemical components has become less common in the last decade, but the design and development of state-of-the-art microelectrodes for small volume analysis of samples have been the focus. This work presents a potential paradigm shift in miniaturization by using cheaper alternatives such as plastics to build electrochemical components. Through minimal processing procedures, an electrochemical working electrode based on a micropipette tip was designed and realized, showing potential for low-cost miniaturized sensors to detect various bio-analytes in sample solutions.
Article
Nanoscience & Nanotechnology
Veena Mounasamy, Ganesh Kumar Mani, Kazuyoshi Tsuchiya, Sridharan Madanagurusamy
Summary: This study proposes a strategy for the preparation of freestanding nanosheets using sputtering technique for sensing toxic ammonia (NH3). The evaluated sputtered vanadium pentoxide (V2O5) film showed good sensor response to 5 ppm NH3 at room temperature.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2022)
Article
Computer Science, Artificial Intelligence
C. Lakshmi, K. Thenmozhi, John Bosco Balaguru Rayappan, Sundararaman Rajagopalan, Rengarajan Amirtharajan, Nithya Chidambaram
Summary: Current medical technology involves massive reports like electronic patient records and scanned medical images, which need to be securely stored for future references. Cloud storage services meet the demand with scalability and availability, but users need to take responsibility to preserve medical data. Existing image encryption solutions are vulnerable to attacks and new technologies are needed to improve security.
NEURAL COMPUTING & APPLICATIONS
(2021)
Article
Computer Science, Information Systems
C. Lakshmi, K. Thenmozhi, John Bosco Balaguru Rayappan, Rengarajan Amirtharajan
Summary: This paper introduces a genetic algorithm-based image encryption scheme to enhance statistical measures of grayscale cipher images and improve key space through chaotic mapping, ensuring digital image security. Fitness tests with correlation and entropy analyses confirm its simple, optimized encryption and defense against attacks.
MULTIMEDIA TOOLS AND APPLICATIONS
(2021)
