Article
Polymer Science
Jyotirmoy Roy, Raghavendar Chikkonda, Gara Kishor, Akhil Raman Thankamani Sathyanathan, K. C. James Raju, Ramesh Babu Gangineni
Summary: This article investigates the structural, microstructural, and ferroelectric characteristics of polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) thin films in Ag/Cu/PVDF-HFP/Cu capacitor structures. The influence of bottom interfaces, such as glass or Cu/glass, on the crystal structure and microstructure of PVDF-HFP thin films is evaluated using grazing incidence X-ray diffractometer and atomic force microscopy. Quasi-static current-voltage loops and polarization versus electric field loops are used to understand the ferroelectric characteristics of PVDF-HFP thin films, and a linear relationship between coercive field and frequency is observed, supporting the homogeneous domain growth model proposed by Kolmogorov-Avrami-Ishibashi.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Sobi K. Chacko, M. T. Rahul, B. Raneesh, Karthik Vinodan, Jini K. Jose, Nandakumar Kalarikkal
Summary: Free-standing self-polarised films of Ho3+ modified Polyvinylidene fluoride co-hexafluoropropylene (PVDF-HFP) have been prepared using a simple and cost-effective solvent casting method. The impact of rare earth hydrated salt on the electroactive nucleation of PVDF-HFP has been investigated, and Ho3+ acts as an excellent filler to induce electroactive gamma and beta phases of PVDF-HFP. The composite films show remarkable improvement in dielectric constant and polarisation, making them useful in piezo, photonic device applications.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Multidisciplinary Sciences
Meng-Fang Lin, Kang-Wei Chang, Chia-Hsien Lee, Xin-Xian Wu, Yu-Ching Huang
Summary: This paper presents a simple electrospinning approach to fabricate P3HT/PVDF-HFP semiconductive nanofiber TENGs. The experimental results showed that the output voltage of the nanogenerator could reach 78 V, with an output power of 0.55 mW, capable of instantly powering 500 LEDs and a digital watch. The durability of the device was also demonstrated through 20,000 cycles of external force testing.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Subhasree Panda, S. K. Khadheer Pasha
Summary: A simple solution casting technique was used to fabricate SrTiO3-loaded PVDF-HFP nanocomposite films, and their characteristics were studied using various microscopic and spectroscopic methods. The nanocomposite films showed improved optical, thermal, and mechanical behavior compared to pure polymer. The 2 wt % SrTiO3 loaded nanocomposite exhibited the highest dielectric enhancement and AC conductivity.
Article
Chemistry, Inorganic & Nuclear
Abhishek Sasmal, Sourav Maity, A. Arockiarajan, Shrabanee Sen
Summary: Inorganic filler-loaded PVDF-based composites have been widely used for electrical and energy harvesting applications. The effects of various filler parameters on the performance of PVDF have been extensively studied, but the influence of filler crystal symmetry on energy harvesting performance has been rarely explored. In this study, PVDF-based composite films were developed using two types of AlFeO3 fillers with different crystal symmetries, and it was found that crystal symmetry strongly affects the piezoelectric energy harvesting performance.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Ceramics
P. Lavanya Rathi, Bharathi Ponraj, S. Deepa
Summary: PVDF films embedded with magnetic Sn0.2Fe2.8O4 nanoparticles were prepared using a solution casting method, exhibiting superparamagnetic characteristics and good dielectric properties. The study suggests the potential applications of these films in microelectronics and magnetic sensors.
CERAMICS INTERNATIONAL
(2021)
Article
Polymer Science
Fatima Ezzahra Bouharras, Salima Atlas, Simone Capaccioli, Massimiliano Labardi, Abdelghani Hajlane, Bruno Ameduri, Mustapha Raihane
Summary: Core-double-shell-structured nanocomposite films consisting of PVDF-g-BT incorporated into a P(VDF-co-HFP) copolymer matrix were prepared for energy storage applications. The addition of PVDF-g-BT improved the thermal stability and crystallinity of the films. The films exhibited three dielectric processes, and mechanical analysis confirmed the uniform distribution and strong interaction of PVDF-g-BT with the copolymer matrix. The suggested system shows promise for high-energy-density storage devices such as supercapacitors.
Article
Chemistry, Multidisciplinary
Dan Lei, Ning Hu, Liangke Wu, Rongyi Huang, Alamusi Lee, Zhaonan Jin, Yang Wang
Summary: In this study, composite films were prepared by adding Ni nanoparticles into poly(vinylidene fluoride-co-hexafluoropropylene) matrix. It was found that the maximum electric field for poling had a decisive effect on the generated output voltage. By adding Ni nanoparticles, the output voltage increased by 23%.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Chemistry, Physical
Yanyi Wang, Kaixiong Huang, Peixin Zhang, Haowen Li, Hongwei Mi
Summary: The study introduces a high-powered GPEs modified by polymer polyethylene glycol (PEG) and lithium montmorillonite (LiMNT) via bond interactions, which shows excellent ionic conductivity and high Li+ migration number. The three-dimensional porous polymer electrolyte is conducive to fast transport and stable deposition of lithium ions, restraining the occurrence and growth rate of lithium dendrites. This leads to improved cycle performance and rate capability of lithium battery.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Smaranika Dash, Vikas N. Thakur, Ashok Kumar, R. N. Mahaling, S. Patel, R. Thomas, Balaram Sahoo, Dillip K. Pradhan
Summary: The mechanism of enhancing dielectric and ferroelectric behavior of polymer-ceramic composites through surface hydroxylation of filler particles is reported. The optimal filler content of 15 wt% in the composite film showed improved microstructure and enhanced particle-polymer surface interaction, leading to higher energy storage density. This work demonstrates the method of enhancing functional properties through suitable microstructure of composite materials with surface hydroxylation of filler particles.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Andres Lopez-Garcia, Aitor Dominguez-Saldana, Alfonso J. Carrillo, Laura Navarrete, Maria I. Valls, Beatriz Garcia-Banos, Pedro J. Plaza-Gonzalez, Jose Manuel Catala-Civera, Jose Manuel Serra
Summary: Exsolution has become a promising method for generating metallic nanoparticles, offering better stability and robustness compared to conventional deposition methods. Alternative exsolution methods that do not rely on high-temperature reduction are being explored, such as utilizing electrochemical potentials or plasma technologies. In this study, a method based on pulsed microwave radiation is proposed for driving the exsolution of metallic nanoparticles, enabling high scalability with short exposure times and low temperatures.
Article
Multidisciplinary Sciences
Sanoar Molla, Farha Khatun, Ujjwal Rajak, Biswajoy Bagchi, Sukhen Das, Pradip Thakur
Summary: In this research, an electroactive polymer based photo-induced hybrid power cell was developed using a CTAB/PVDF composite film. The cell exhibited good performance and high energy storage capability.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Muhua Yuan, Haijun Wang, Tong Wang, Haibo Yang, Chunlei Yuan
Summary: In this study, a composite film of gamma-phase PVDF with excellent dielectric properties was prepared using a deep eutectic solvent (DES) and montmorillonite (MMT). DES induced the crystallization of gamma-phase and increased the dielectric constant of the composite through increased ion motion. Furthermore, DES promoted the dispersion of MMT layers, inhibiting long-range ion migration and reducing the dielectric loss of the composite. The PVDF/MMT/DES composite films exhibited a high dielectric constant of 32 and a low dielectric loss of 0.06 at 1 kHz. Additionally, the synergistic effect of MMT/DES improved the toughness and optical transmittance of the composite films.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Characterization & Testing
Vera P. Pavlovic, Dragana Tosic, Radovan Dojcilovic, Dusko Dudic, Miroslav D. Dramicanin, Mina Medic, Michael M. McPherson, Vladimir B. Pavlovic, Branislav Vlahovic, Vladimir Djokovic
Summary: NKBT perovskite particles were synthesized and used as fillers in PVDF-HFP copolymer, resulting in enhanced dielectric properties in the composite. Introduction of NKBT particles also induced the appearance of an additional transition peak in the dielectric spectra of the copolymer matrix.
Article
Materials Science, Multidisciplinary
Xiaofeng Xia, Junquan Zhou, Huimin Ding, Qin Li, Maolin Bo, Qihuang Deng, Yefeng Feng
Summary: The introduction of montmorillonite filler into polymer/conductor composites can effectively reduce dielectric loss and conductivity of the composites. The novel ternary composites, with the addition of montmorillonite, show a mildly reduced dielectric constant, but significantly decreased dielectric loss and conductivity.
ELECTRONIC MATERIALS LETTERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Dhananjoy Mondal, Shubham Roy, Souravi Bardhan, Jhilik Roy, Ishita Kanungo, Ruma Basu, Sukhen Das
Summary: Piezocatalysis, utilizing the piezoelectric effect to enhance reactive oxygen species production for pollutant degradation, has emerged as a promising field in wastewater treatment. This technique is non-invasive and attracts researchers globally, with various functional materials being employed for effective wastewater remediation.
DALTON TRANSACTIONS
(2022)
Article
Engineering, Electrical & Electronic
Sanoar Molla, Farha Khatun, Pradip Thakur
Summary: A low-cost and bio-compatible photo-induced K-ion-based power cell has been developed, showing a maximum open circuit voltage of around 1V under light intensity of 110 mW/cm(2). The cell demonstrated a storage capacity of approximately 16 F/m(2) with energy density and power density of around 2.22 mWh/m(2) and 5 W/m(2) respectively. Additionally, a commercially available LED was successfully powered by this fabricated power cell, demonstrating its practical application possibilities.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Debopriyo Ghoshal, Debopriya Bhattacharya, Dheeraj Mondal, Sukhen Das, Navonil Bose, Mousumi Basu
Summary: This study reports the fabrication of multiband laser-filters using dye/polymer composites. The composites exhibit modified optical band gap and flexibility. The fabricated composite films can block and withstand high power laser for a long time, making them suitable for modern optoelectronics applications.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Biochemistry & Molecular Biology
Chiranjit Ghosh, Debashis Patra, Niranjan Bala, Indira Majumder, Nayim Sepay, Prabuddha Mukhopadhyay, Sukhen Das, Rita Kundu, Michael G. B. Drew, Armando Rafael Leon, Tapas Ghosh, Manik Pradhan
Summary: This article reports the synthesis of a family of dioxidovanadium(V) complexes and their activities in the treatment of diabetes and cancer. The complexes showed inhibitory effects on erythrocyte carbonic anhydrase enzyme activity and promising antidiabetic activity in vitro and in vivo. They also exhibited significant cytotoxic activity against cervical cancer cells, and the mechanism of cell death was through apoptosis induced by reactive oxygen species (ROS) generation. The complexes are soluble in water and octanol, and are non-toxic at working concentrations.
Article
Materials Science, Multidisciplinary
Tanumoy Debnath, Tanmoy Chakraborty, Atul Bandyopadhyay, Shivam Sharma, Abhik Sinha Mahapatra, Sukhen Das, Soumyaditya Sutradhar
Summary: This study reports the synthesis of undoped ZnO and Cr-doped ZnO nanomaterials using co-precipitation and hydrothermal methods. The properties of the nanomaterials were investigated, revealing a significant reduction in band gap energy and an increase in dielectric constant in the Cr-doped ZnO nanoparticles. Impedance spectroscopy provided insight into the electrical responses and conducting nature of the nanomaterials.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Review
Instruments & Instrumentation
Shilpa Maity, Umme Karnij Salma Parvin, Sukhen Das, Krishanu Chatterjee
Summary: The breakthrough invention of conducting polymers has opened up new possibilities for their use in thermoelectric applications. Strategies to enhance their structural order and thermoelectric performance have been explored. The use of chalcogenide materials as nano fillers has shown promise in improving thermoelectric properties. Research on composites of conducting polymers and various chalcogenides has gained attention in thermoelectric field.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Spectroscopy
Souravi Bardhan, Shubham Roy, Sanghita Das, Ishita Saha, Dhananjoy Mondal, Jhilik Roy, Dipak Kr Chanda, Solanky Das, Parimal Karmakar, Sukhen Das
Summary: This article presents a facile strategy for detecting hexavalent chromium using a naturally formed mineral-based fluorometric sensor. The sensor shows stable bright blue fluorescence and can effectively detect hexavalent chromium in wastewater and living cells. It offers advantages such as ease of synthesis, low cost, and stability, making it suitable for large-scale production and industrial applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Geosciences, Multidisciplinary
Indrajit Ghosh, Sukhen Das, Nabajit Chakravarty
Summary: This study develops a model to investigate the anomaly temperature in tropical cyclones and discovers its relationship with cyclone velocity. By analogically equating the cyclonic structure to a rotating hollow cylinder, the study provides insights into other critical factors for cyclone development. The empirical approach used in addressing tropical cyclone stability allows for the validation of the model using observational data.
Article
Materials Science, Ceramics
Debmalya Sarkar, Namrata Das, Minarul Saikh, Prosenjit Biswas, Shubham Roy, Sumana Paul, Nur Amin Hoque, Ruma Basu, Sukhen Das
Summary: This study presents a flexible and wearable nanocomposite device that can harvest and convert mechanical energy into electrical energy. The device is made of a nitrogen doped carbon dot (N-CD) modified PVDF (PCD) nanocomposite with a 'sandwiched' structure wrapped with aluminum electrodes. The device exhibits enhanced electrical parameters and a piezoelectric coefficient of 29 pC/N, making it suitable for healthcare monitoring systems and power supplies.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Sanghita Das, Debbethi Bera, Debojyoti De, Dheeraj Mondal, Parimal Karmakar, Sukhen Das, Anindita Dey
Summary: This study focuses on the development of edible, nontoxic, and biodegradable composite films containing natural therapeutics, using polymers. The extraction of psyllium husk mucilage, a natural polysaccharide, and its combination with chitosan to create composite films were investigated. The polymeric films exhibited sustained release of thy-moquinone and demonstrated significant antimicrobial and anticancer activities.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Physical
Namrata Das, Debmalya Sarkar, Md. Minarul Saikh, Prosenjit Biswas, Sukhen Das, Nur Amin Hoque, Partha Pratim Ray
Summary: This study designs two simple, cost-effective, and eco-friendly piezoelectric nanogenerators using biodegradable mud volcano clay. These nanogenerators have good energy harvesting capability and fast charging speed, and can generate voltage through various methods.
Article
Multidisciplinary Sciences
Sanoar Molla, Farha Khatun, Ujjwal Rajak, Biswajoy Bagchi, Sukhen Das, Pradip Thakur
Summary: In this research, an electroactive polymer based photo-induced hybrid power cell was developed using a CTAB/PVDF composite film. The cell exhibited good performance and high energy storage capability.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Dhananjoy Mondal, Souravi Bardhan, Namrata Das, Jhilik Roy, Saheli Ghosh, Anupam Maity, Shubham Roy, Ruma Basu, Sukhen Das
Summary: Scientists have developed a natural clay and multi-walled carbon nanotube-based nanocomposite for creating a multifunctional piezo-responsive membrane. This membrane can generate piezoelectric energy under the flow of water droplets and effectively remove pollutants and eradicate pathogenic bacteria under ultrasonic vibration.
Article
Chemistry, Inorganic & Nuclear
Jhilik Roy, Leenia Mukhopadhyay, Souravi Bardhan, Dhananjoy Mondal, Saheli Ghosh, Sudip Chakraborty, Neelanjana Bag, Shubham Roy, Ruma Basu, Sukhen Das
Summary: This study reports the solvothermal synthesis of ferromagnetic bismuth ferrite nanoparticles and explores their piezo activity in catalytic degradation of carcinogenic dye and pathogenic bacteria. The structural and morphological features of the catalyst were investigated using density functional theory, which revealed high polarizability and dipole moment. The synthesized material exhibited enhanced piezo catalytic degradation efficiency and simple extraction, making it a potential candidate for sustainable wastewater treatment.
DALTON TRANSACTIONS
(2022)
