Article
Physics, Applied
T. Yajima, S. P. Pati
Summary: This study focuses on electrochemically doped protons inside TiO2 thin films to clarify the design principle for volatile memories. The research finds that the volatility of protons on the TiO2 surface can be controlled by the diffusion of protons inside a SiO2 cap layer. These findings provide a basic design principle for volatile memories.
APPLIED PHYSICS LETTERS
(2022)
Article
Polymer Science
Guimao Fu, Qisong Shi, Yongri Liang, Yongqing He, Rui Xue, Shifeng He, Yanjun Chen
Summary: The development of multi-functional piezoelectric polymer film is highly significant for wearable functional devices, flexible sensors, and intelligent wearables. This study prepared a fluorescent labeled multimode pressure sensor using electrospinning technology with P(VDF-HFP) nanocomposite films. The sandwich-structured devices showed high sensitivity, piezoelectric output, fluorescence functionality, flexibility, and thermal properties. The results suggest that sandwich-structured devices based on fluorescent labeled electroactive P(VDF-HFP) composite nanofiber films have great potential for multi-functional flexible sensors and intelligent wearables.
Article
Chemistry, Analytical
Guanglu Lei, Chengming Lou, Xianghong Liu, Jiayue Xie, Zishuo Li, Wei Zheng, Jun Zhang
Summary: Thin film technology, specifically tungsten trioxide (WO3) as a metal oxide semiconductor (MOS) sensing material, shows great promise for gas sensor applications. This review provides an overview of WO3 thin films, their sensing mechanisms, preparation methods, gas sensing performances, and strategies for improving sensor properties. Future perspectives and challenges of WO3 thin film sensors are also discussed.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Nanoscience & Nanotechnology
Sarda Sharma, P. N. Sidhartha, Karumbaiah N. Chappanda
Summary: In this study, TiO2 nanotubes were improved through two types of treatments to enhance the sensitivity and performance of dopamine electrochemical sensors. The dual-treated TiO2 nanotubes exhibited significantly improved sensitivity, reduced charge transfer resistance, increased carrier density, and lowered detection limit compared to plain TiO2 nanotubes sensors. The dual treatment approach shows promise for enhancing the performance of TiO2 nanotubes and other nanomaterial based electrochemical sensors.
Article
Chemistry, Analytical
Mihai Brinza, Stefan Schroeder, Nicolai Ababii, Monja Gronenberg, Thomas Strunskus, Thierry Pauporte, Rainer Adelung, Franz Faupel, Oleg Lupan
Summary: Certain molecules in exhaled breath or outgassing vapors can act as biomarkers for various diseases and food spoilage. The development of small and reliable devices with high sensitivity for detection of these molecules is in demand. Metal-oxide gas sensors present an ideal solution, offering a tradeoff between performance and cost compared to other methods. However, selective detection of low levels of ammonia and multiple gases with one sensor remains a challenge.
Article
Chemistry, Analytical
Aleksei V. Almaev, Nikita N. Yakovlev, Dmitry A. Almaev, Maksim G. Verkholetov, Grigory A. Rudakov, Kristina I. Litvinova
Summary: The gas sensitivity and structural properties of TiO2 thin films deposited by plasma-enhanced atomic layer deposition (ALD) were examined. The ALD-deposited TiO2 thin films demonstrated high sensitivity to O-2 and low concentrations of H-2, NO2. The ALD deposition allowed for enhanced sensitivity of TiO2 thin films to gases.
Article
Engineering, Electrical & Electronic
Sarda Sharma, Sankalp Koduvayur Ganeshan, Souvik Kundu, Karumbaiah N. Chappanda
Summary: The study demonstrates that electrochemical doping can greatly enhance the performance of TiO2 nanotubes based electrochemical sensors, with the Ni-NPs embedded T-NTs-WO3 device showing superior performance in glucose detection. This is mainly attributed to the synergetic effect between WO3 dopant and Ni(OH)(2) electro catalyst.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Fan Zhang, Hailong Hu, Simin Hu, Jianling Yue
Summary: This study utilized TiO2 nanowires to enhance the sensitivity of CF/PDMS composite strain sensors, introducing a more porous structure to improve sensitivity and demonstrating significant strain rate dependent behavior.
JOURNAL OF ADVANCED CERAMICS
(2021)
Article
Chemistry, Analytical
Marco S. Rodrigues, Joel Borges, Filipe Vaz
Summary: This study introduces a thin film with reversible optical response that exhibits localized surface plasmon resonance (LSPR) phenomenon under repeated uniaxial strain. Gold nanoparticles were grown throughout a titanium dioxide dielectric matrix to prepare the sensing platform. The flexible nanoplasmonic transducers showed a higher sensitivity and transmittance gauge factor at maximum strain, indicating a reduction in the refractive index of the matrix surrounding the gold nanoparticles. Optical modeling using discrete dipole approximation suggests a correlation between the optical response of the strained thin film sensor and the reduction in refractive index.
Article
Chemistry, Multidisciplinary
Naida El Habra, Francesca Visentin, Francesca Russo, Alessandro Galenda, Alessia Famengo, Marzio Rancan, Maria Losurdo, Lidia Armelao
Summary: This article discusses the application of titanium dioxide (TiO2) thin films as sensors in harsh environments. By utilizing chemical etching and coating techniques, high surface area TiO2 thin films were obtained for chemical oxygen demand (COD) sensor research. The results demonstrate that acid-etched meshes with optimal surface morphology exhibit the best activity and degradation performance.
Article
Materials Science, Multidisciplinary
Haoxuan Li, Shan Liu, Shaomin Xu, Dandan Sun, Yongming Fu
Summary: This study presents a high-sensitivity optical fiber relative humidity (RH) sensing probe using a U-shaped microfiber coated with molybdenum disulfide (MoS2) films. The experimental results demonstrate that the thickness of the film directly impacts the RH sensitivity of the sensor. By selectively choosing microfibers coated with MoS2 materials of varying thicknesses, the sensor can be optimized for monitoring RH levels in different environments.
Article
Engineering, Electrical & Electronic
M. Sathya, G. Selvan, K. Kasirajan, S. Usha, P. Baskaran, M. Karunakaran
Summary: This study employed a simple and cost-effective SILAR approach to fabricate ZnO and Zr-doped ZnO thin films. The incorporation of Zr improved the NH3 sensing performance of the films, resulting in excellent gas response and stability.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Optics
Xixi Huang, Min Lai, Ziming Zhao, Yang Yang, Jinze Li, Huatang Song, Jixiang He, Yan Ma, Bo Liu
Summary: The SiO2/TiO2 bilayer thin-film-based fiber optic humidity sensor exhibits enhanced sensitivity, two-segmented linearity in measurement within different ranges of relative humidity, and short response and recovery times. It also demonstrates good reproducibility and long-term stability, with the sensing mechanism primarily attributed to the influence of humidity on the properties of the SiO2 film.
Article
Materials Science, Multidisciplinary
Pradeep Sachan, Prakash Chandra Mondal
Summary: Surface engineering with controlled molecular structures, compositions, thicknesses, packing, and orientations is crucial for understanding nanoscale interfacial phenomena. The fabrication of coordination-compound-based oligomer films with well-defined chemical structures, compositions, orientations, and thicknesses is essential for 'on-surface' optoelectronic and electrical applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
K. Khojier, S. Goudarzi, M. Firouzi
Summary: In this study, TiO2 thin films-based ethanol sensors were fabricated and their sensing performance was engineered by changing the sputtering power. The results showed that the variation of sputtering power had a significant effect on the ethanol vapor sensing performance of the devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Analytical
Veena Mounasamy, Ganesh Kumar Mani, Dhivya Ponnusamy, Kazuyoshi Tsuchiya, P. R. Reshma, Arun K. Prasad, Sridharan Madanagurusamy
ANALYTICA CHIMICA ACTA
(2020)
Article
Engineering, Electrical & Electronic
B. K. Balachandar, T. Logu, R. Hari Ramprasath, K. Sankarasubramanian, P. Soundarrajan, M. Sridharan, K. Ramamurthi, K. Sethuraman
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2020)
Article
Engineering, Electrical & Electronic
Reshma P. Radhakrishnan, Arun K. Prasad, Sandip Dhara
IEEE SENSORS JOURNAL
(2020)
Article
Materials Science, Multidisciplinary
Anil Kumar Behera, Raghavan Nadar Viswanath, T. Manovah David, Arun K. Prasad, Puthuparampil K. Ajikumar, Tom Mathews
Summary: In this study, the sensing properties of a chemi-resistive gas sensor were improved by surface functionalization using silicon nanowalls (SiNWs) decorated with platinum (Pt) and palladium (Pd) nanoparticles. The morphological investigation revealed vertically aligned SiNW architecture with original single-crystalline nature even after surface modification. The combinatorial effect of single-crystalline SiNWs and catalytic properties of Pt and Pd resulted in enhanced sensing characteristics, making the fabrication technique economically scalable for real-time and facile industrial applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Veena Mounasamy, Ganesh Kumar Mani, Kazuyoshi Tsuchiya, Sridharan Madanagurusamy
Summary: This study proposed a new method for sensing elements in wearables, using standalone PLLA/V2O5 nanosheets to improve ammonia sensing response. Surface modification of PLLA substrates using nanoimprint lithography was implemented to enhance sensing performance.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
M. Vadivel, R. Ramesh Babu, M. Sridharan
Summary: This study reports the characteristics of Cr3+- and Zn2+-substituted CoFe2O4 thin films prepared by solution-based spray pyrolysis method. The results show that the substitution of transition metal ions significantly affects the surface topography and gas-sensing behavior of the films. Cr3+-substituted CoFe2O4 thin films exhibit excellent sensing behavior towards NH3 gas at room temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Applied
M. Vadivel, R. Ramesh Babu, M. Sridharan
Summary: This study reports the NH3 gas-sensing properties of homemade spray deposited CoFe2O4 thin films substituted with La3+ and Sm3+ ions. The results show that the substitution significantly enhances the gas-sensing characteristics of the films, making them potential materials for room temperature NH3 gas sensors even at low ppm concentrations.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Materials Science, Multidisciplinary
K. Veera Prabu, Vinothkumar Lourdhusamy, Immanuel Paulraj, M. Sridharan, Chia-Jyi Liu
Summary: The weighted mobility is a better descriptor of the optimal performance of electronic transport for thermoelectric materials. Sn doping on the electronegative Sb site lowered the electrical resistivity and enhanced the power factor of p-Mg3Sb2. The highest power factor of the Mg3Sb1.96Sn0.04 alloy is 2.55 mu W/cm-K-2 having 16 times enhancement as compared to the pristine Mg3Sb2 at 700 K.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Thangavel Ravikumar, Logu Thirumalaisamy, Sridharan Madanagurusamy, Kalainathan Sivaperuman
Summary: Ammonia (NH3) production, storage, and transportation are susceptible to leaks, posing risks to the environment and human life. Detecting NH3 within the exposure limit is crucial for eliminating health hazards. Thin films of zinc ferrite (ZF) were deposited using spray pyrolysis at different substrate temperatures. The film deposited at 225 degrees C showed a good sensing response to 25 ppm of NH3 and exhibited stability over 90 days. This research demonstrates that ZF thin films can effectively detect NH3 in the environment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
K. Gayathri, K. Ravichandran, M. Sridharan, S. Suvathi, S. Sriram, R. Mohan, A. Jansi Santhosam, P. K. Praseetha, P. Sakthivel
Summary: Metal oxide based semiconductors, particularly Mo-doped SnO2 films, show promise in the development of cost-effective gas sensors. This study investigated the gas sensing ability of SnO2 films doped with different concentrations of Mo. Results showed that the SnO2:Mo film with 1wt% Mo doping exhibited the best response and recovery times. Changes in crystal structure, oxygen vacancies, surface morphology, grain size, and surface roughness caused by Mo doping were found to enhance the gas sensing performance.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
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)
Proceedings Paper
Materials Science, Multidisciplinary
Veera Prabu Kannan, Immanuel Paulraj, Vinothkumar Lourdhusamy, Chia-Jyi Liu, Sridharan Madanagurusamy
Summary: The chalcopyrite compound zinc tin antimonide (ZnSnSb2) is a promising thermoelectric material with high electrical conductivity, non-toxicity, low cost, and abundant availability. The synthesis of ZnSnSb2 by a simple one-step Solid-State Reaction method and the characterization of its microstructural and electronic transport properties were studied.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Veera Prabu Kannan, Veena Mounasamy, Sridharan Madanagurusamy
Summary: The TiO2-VOx mixed metal oxide thin film deposited by reactive co-sputtering technique shows higher selectivity and sensitivity towards DMA vapor compared to binary oxides VOx and TiO2.
MATERIALS TODAY-PROCEEDINGS
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
P. Kamaraj, M. Sridharan, Vennila raj, J. Arockiaselvi, T. Pushpamalini, P. A. Vivekanand
Summary: A series of ZnO nanoparticles were successfully synthesized via a biosynthesis method, and characterized using various techniques. The nanoparticles showed superior photocatalytic activities for indigo carmine degradation under visible light irradiation, along with high stability and reusability.
MATERIALS TODAY-PROCEEDINGS
(2021)
Article
Chemistry, Multidisciplinary
Veena Mounasamy, Ganesh Kumar Mani, Dhivya Ponnusamy, Kazuyoshi Tsuchiya, P. R. Reshma, Arun K. Prasad, Sridharan Madanagurusamy
NEW JOURNAL OF CHEMISTRY
(2020)
