Article
Materials Science, Multidisciplinary
Amitkumar R. Patil, Tukaram D. Dongale, Sunil S. Nirmale, Rajanish K. Kamat, Keshav Y. Rajpure
Summary: This study demonstrates the development and investigation of bipolar resistive switching characteristics of the Al/Bi2WO6/FTO thin-film memristive device. The optimized device shows maximum current and the highest memristive area, with the ability to switch in consecutive cycles and retain data up to a certain period of time without degradation. The device possesses double valued charge-flux property, indicating the presence of memristive properties.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Rohit Patil, Yogesh Khollam, Aniket Kadam, Bhaurao Bond, Revati Potdar, Baliram Nadekar, Umesh T. Nakate, Shoyebmohamad F. Shiakh, Pravin S. More
Summary: This study investigates the synthesis and characterization of cadmium sulfide (CdS) and graphene oxide (GO) composite films, which show promising optical and electric properties for solar cell applications. The composite films exhibit enhanced optical properties compared to pure CdS films, indicating their potential for use in solar cell applications. The spray deposition method used in this study offers a simple and cost-effective way to prepare large-area films for practical applications.
SURFACES AND INTERFACES
(2023)
Article
Polymer Science
P. Kalyani, T. Muthupandeeswari
Summary: This study investigates the fabrication of pore-free PVA@MgO nanocomposite films by dispersing MgO filler in PVA matrix using solution casting technique. The films exhibited improved structural, optical, thermal, mechanical, dielectric and biodegradable properties with increasing MgO loading. The findings suggest the potential application of these nanocomposites in future power electronics, optoelectronics and semiconducting devices.
Article
Chemistry, Multidisciplinary
Inho Song, Liyan You, Ke Chen, Won-June Lee, Jianguo Mei
Summary: Homogeneous chiral electrochromics using chiral assembly of conjugated polymers have been developed through a transient solidification process with molecular chiral templates. The circular dichroism can be tuned by adjusting the doping level of the electrochemically active polymer films. The differential circularly polarized transmission in the chiral see-through display can make a well-resolved color change, demonstrating proof-of-concept devices for information encryption.
ADVANCED MATERIALS
(2023)
Article
Biotechnology & Applied Microbiology
K. R. Srivastava, S. Dixit, D. B. Pal, P. K. Mishra, Pradeep Srivastava, Neha Srivastava, Abeer Hashem, Abdulaziz A. Alqarawi, Elsayed Fathi Abd Allah
Summary: In this study, PVA-banana pseudostem fiber lignocellulosic composite films were prepared by solution casting method and reinforced with nanocellulose filler to enhance mechanical and barrier properties. The addition of nanocellulose significantly improved the mechanical and water barrier properties of the films, making them a suitable alternative to plastic packaging films.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Materials Science, Multidisciplinary
B. Kamecki, J. Karczewski, G. Cempura, P. Jasinski, S. Molin
Summary: This study reported the preparation of (Mn,Co,Fe,Ni,Cr)3O4 high-entropy spinel oxide thin film with a thickness of -500 nm using a facile spray pyrolysis technique. The structural and electrical properties of the film were characterized after heat treatment at temperatures ranging from 400-900°C. The as-deposited film was amorphous and crystallized at 500°C, showing a homogeneous elemental distribution and the desired Fd-3m cubic spinel structure. The electrical conductivity of the film was found to depend on the processing temperature, with the highest conductivity obtained at 700°C.
MATERIALS CHARACTERIZATION
(2023)
Article
Polymer Science
Muhammad Aslam, Mazhar Ali Kalyar, Zulfiqar Ali Raza
Summary: Flexible, strong, and optically tunable nano-CuO-loaded poly(vinyl alcohol) (PVA) composite films were fabricated using a solution casting approach, showing significant changes in material properties with a small loading of CuO nanofiller. Experimental results suggest potential applications of these nanocomposite films in optoelectronic devices.
Article
Materials Science, Multidisciplinary
Mane Seck, Abdou Karim Diallo, Mohsen Erouel, Meriem Saadi, Belgacem Tiss, Mohammed Amine Wederni, Abdoulaye Tall, El Hadji Babacar Ly, Diouma Kobor, Noureddine Bouguila, Kamel Khirouni
Summary: This study investigates the dielectric and material properties of almond gum, revealing that its dielectric parameters are temperature and frequency dependent. The almond gum thin films exhibit high transmittance and hydrophobic surfaces, making it a potentially interesting candidate for electronic applications.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Composites
Omid Aghababaei Tafreshi, Zia Saadatnia, Shahriar Ghaffari-Mosanenzadeh, Tianhao Chen, Sophie Kiddell, Chul B. Park, Hani E. Naguib
Summary: This study presents the fabrication of novel polyimide composite aerogel films with tunable dielectric properties by incorporating graphene nanoplatelet fillers. The addition of graphene improved the nanostructure of aerogels, resulting in improved homogeneity and uniformity of the composite gel films. The inclusion of graphene nanoplatelets proved to be an effective strategy for improving the mechanical properties, machinability, and thermal stability of aerogels.
COMPOSITES COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Y. P. Shinde, P. N. Sonone, R. K. Kendale, P. M. Koinkar, A. U. Ubale
Summary: Nanostructured Sb2O3 thin films were deposited on glass substrates using the chemical spray pyrolysis technique, and the impact of precursor solution volume on physical properties was investigated. The study revealed that the phase transformation from senarmontite cubic phase to valentinite orthorhombic phase is complete as the precursor solution volume increases. The films exhibited nano-dimensional cubic hexagonal and orthorhombic octahedral morphologies with varying bandgap energies, semiconducting behavior, and electrical resistivity dependent on spray solution volume.
Article
Biochemistry & Molecular Biology
Liu Yang, Lixuan Ren, Yanzhen Zhao, Siqun Liu, Huifang Wang, Xianghua Gao, Baolong Niu, Wenfeng Li
Summary: In this study, arginineated chitosan (ACS) was used to synthesize ACS-ZnO NPs, which were then incorporated into a polyvinyl alcohol (PVA) matrix to form antimicrobial films. The ACS and ACS-ZnO NPs exhibited better water solubility and good cytocompatibility. The addition of ACS and ACS-ZnO NPs improved the mechanical properties, water barrier, and antibacterial activities of the composite film, and it also showed biodegradability. Therefore, PVA films based on ACS and ACS-ZnO NPs have great potential for food packaging applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Esra Kaya, Ali Ugur, Arife Gencer Imer, Murat Aycibin, Yusuf Selim Ocak
Summary: The physical properties of ultrasonically spray deposited Yttrium (Y) doped tin dioxide (SnO2) have been experimentally and theoretically investigated in this study. The results show that yttrium doping influences the structural, optical and electrical properties of the SnO2 films, with an increase in optical transmittance and optical band gap observed with increasing yttrium doping. Y-doped films also exhibit lower resistivity, higher carrier concentration, and sufficient mobility, suggesting the important effect of yttrium doping on the optoelectronic properties of the nanostructured SnO2 film.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Polymer Science
A. S. Abouhaswa, H. M. Abomostafa
Summary: FeCl3 loading in PVA matrix improves the structural and optical properties of composite films. PVA/FeCl3 composite films with different FeCl3 contents were prepared. FTIR and XRD were used to examine the structural characteristics and composition. Optical performance was analyzed using UV-visible-NIR spectra measurements. Increasing FeCl3 content in PVA matrix decreased the direct band gap and increased nonlinear optical parameters, making PVA/FeCl3 films suitable for flexible optoelectronic applications.
Article
Materials Science, Multidisciplinary
Yingying Huang, Hongmei Zhao, Shaojuan Chen, Gang Wan, Dagang Miao
Summary: The study describes the preparation of waterproof and breathable bandages using plasma-treated PE films and a blend of polyvinyl alcohol-alginic acid. The composited bandages showed excellent cooling ability and improved waterproof and breathable properties, enhancing wound healing.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Anayantzi Luna Zempoalteca, Jose Alvaro David Hernandez de la Luz, Adan Luna Flores, Jose Alberto Luna Lopez, Alfredo Benitez Lara
Summary: This study reports on the characterization of manganese phthalocyanine (MnPc) films deposited on glass substrates using the ultrasonic spray-pyrolysis technique and subjected to thermal annealing. The MnPc films were characterized using spectroscopic and microscopy techniques, and their optical and structural properties were determined. The results obtained are consistent with those reported in the literature for MnPc films deposited using other techniques.
Article
Materials Science, Multidisciplinary
Koppole Kamakshi, J. P. B. Silva, N. S. Kiran Kumar, K. C. Sekhar, M. Pereira
MRS COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Kevin Varghese Alex, Parthiban Tamil Pavai, Radhasaran Rugmini, Madavi Shiva Prasad, Koppole Kamakshi, Koppole Chandra Sekhar
Article
Materials Science, Composites
Tarun Garg, Venkateswarlu Annapureddy, K. C. Sekhar, Dae-Yong Jeong, Navneet Dabra, Jasbir S. Hundal
POLYMER COMPOSITES
(2020)
Review
Chemistry, Physical
Jose P. B. Silva, Koppole C. Sekhar, Hao Pan, Judith L. MacManus-Driscoll, Mario Pereira
Summary: Dielectric capacitors are optimal energy storage systems with high power density and long lifetime. HfO2 and ZrO2-based thin films show strong potential, particularly in their ferroelectric properties that play a significant role in various modern technologies.
ACS ENERGY LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Tarun Garg, Venkateswarlu Annapureddy, K. C. Sekhar, Dae-Yong Jeong, Navneet Dabra, Jasbir S. Hundal
Summary: PVDF is a semi-crystalline ferroelectric polymer that can be stabilized in its distinct electroactive polymorphs through selective processing techniques. The introduction of BCZT ceramic particles in PVDF matrix enhances the overall crystallinity of the polymer but has no significant effect on PVDF phase stabilization. The dielectric studies show that the composite films with BCZT content have higher relative permittivity and lower loss tangent values, improving the overall electrical properties of ceramic/polymer composites.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jose P. B. Silva, Raluca F. Negrea, Marian C. Istrate, Sangita Dutta, Hugo Aramberri, Jorge Iniguez, Fabio G. Figueiras, Corneliu Ghica, Koppole C. Sekhar, Andrei L. Kholkin
Summary: Zirconia- and hafnia-based thin films have attracted significant attention due to their ferroelectric behavior at the nanoscale. This study reveals a new ferroelectric rhombohedral phase of ZrO2 in thin films grown on (111)-Nb:SrTiO3 substrates, exhibiting high ferroelectric polarization and low coercive field with characteristics in agreement with the nucleation limited switching (NLS) model for ferroelectric domain reversal.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Materials Science, Multidisciplinary
Ampattu R. Jayakrishnan, Anuj Kumar, Sahana Druvakumar, Rosmin John, Meera Sudeesh, Venkata Sreenivas Puli, Jose P. B. Silva, Maria J. M. Gomes, Koppole C. Sekhar
Summary: Scientific research has shown that ferroelectric materials, particularly inorganic ferroelectric materials, play a crucial role in flexible energy devices. These devices, including energy harvesters, infrared sensors, and energy storage capacitors, focus on self-powered flexible sensors and energy harvesters to promote sustainability. By combining inorganic ferroelectric materials with organic/inorganic polymers, flexible devices can meet the requirements of high mechanical strength, piezoelectric and pyroelectric coefficients, and energy storage properties essential for harvesting, sensing, and storage applications. This review article provides a systematic analysis of flexible inorganic ferroelectric-based energy materials, discussing the importance of inorganic ferroelectrics and their current state-of-the-art in energy harvesting, IR sensing, and energy storage. It also explores the challenges and future prospects of developing high-quality flexible inorganic ferroelectric devices for real-world applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Ceramics
Muhassinah Tasneem, Carlos R. P. Monteiro, N. S. Kiran Kumar, J. P. B. Silva, K. C. Sekhar, K. Kamakshi, M. Pereira
Summary: In this work, the effects of thickness on the properties of BZCT-STO thin films were studied. XRD analysis showed a polycrystalline tetragonal structure with strain relaxation in thicker films. SEM analysis revealed a dense columnar structure with varying grain size. The P-E loops indicated enhanced relaxor behavior and the RS effect was significant at low thickness. The energy storage properties were investigated, showing robust performance in a wide frequency range and over a large number of cycles.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Kevin V. Alex, Jose P. B. Silva, Koppole Kamakshi, Koppole C. Sekhar
Summary: This study demonstrates the fabrication of a highly efficient ternary heterostructure photocatalyst composed of ferroelectric BaTiO3 (BTO), semiconductor MoO3, and plasmonic silver nanoparticles (Ag NPs). The BaTiO3/MoO3/Ag (BMA) heterostructure exhibits superior photodegradation and photocatalytic efficiency compared to its binary counterparts. The enhanced photocatalytic activity in the BMA heterostructure is attributed to the enhanced interfacial electric field and electron transfer towards the top Ag NPs layer. The improved charge carrier generation and separation in the BMA heterostructure are evident from the higher resistive switching ratio, increased difference in voltage minima, and enhanced photocurrent generation observed in the I-V characteristics.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
A. R. Jayakrishnan, J. P. B. Silva, K. Kamakshi, V Annapureddy, I. F. Mercioniu, K. C. Sekhar
Summary: The study presents a novel strategy to enhance the dielectric breakdown strength and energy storage performance of lead-free relaxor ferroelectric ceramics by fabricating semiconductor/relaxor 0-3 type composites. The energy storage properties were found to be optimal at 1 wt. % ZnO, with a recoverable energy density of 2.61 J/cm(3) and an efficiency of 74.2%.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2021)
Article
Engineering, Electrical & Electronic
Jose P. B. Silva, Koppole C. Sekhar, Katerina Veltruska, Vladimir Matolin, Raluca F. Negrea, Corneliu Ghica, Marcelo J. S. Oliveira, Joaquim Agostinho Moreira, Mario Pereira, Maria J. M. Gomes
ACS APPLIED ELECTRONIC MATERIALS
(2020)
Article
Chemistry, Physical
J. P. B. Silva, J. M. B. Silva, K. C. Sekhar, H. Palneedi, M. C. Istrate, R. F. Negrea, C. Ghica, A. Chahboun, M. Pereira, M. J. M. Gomes
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Chemistry, Physical
J. P. B. Silva, E. M. F. Vieira, J. M. B. Silva, K. Gwozdz, F. G. Figueiras, K. Veltruska, V. Matolin, M. C. Istrate, C. Ghica, K. C. Sekhar, A. L. Kholkin, L. M. Goncalves, A. Chahboun, M. Pereira
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Nanoscience & Nanotechnology
A. R. Jayakrishnan, Penna Venkata Karthik Yadav, J. P. B. Silva, K. C. Sekhar
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2020)
