Article
Polymer Science
Silvia Beatriz Brachetti-Sibaja, Diana Palma-Ramirez, Aide Minerva Torres-Huerta, Miguel Antonio Dominguez-Crespo, Hector Javier Dorantes-Rosales, Adela Eugenia Rodriguez-Salazar, Esther Ramirez-Meneses
Summary: The optimal conditions for synthesizing and purifying carbon nanotubes from ferrocene were determined through CVD, with key parameters being processing temperature and purification method. The CNTs produced by CVD were found to be superior to commercial ones for preparing composites with conductive polymers, enhancing structural stability and electrical properties. The synergistic effects among hydrogen bonds, stability, and conductivity were more pronounced in PANI/MWCNTs composites, suggesting potential for various technological applications.
Article
Materials Science, Multidisciplinary
A. Bajorek, B. Szostak, M. Dulski, J. -m. Greneche, J. Kubacki, S. Lewinska, B. Liszka, M. Pawlyta, A. Slawska-Waniewska, M. Szczepanik, E. Partyka-Jankowska, T. Sobol
Summary: This study compares the NZFO/f-MWCNTs composites based on Ni0.5Zn0.5Fe2O4 (NFZO) nanoparticles with 5 wt % and functionalized multi-walled carbon nanotubes (f-MWCNTs), synthesized by ex-situ and in-situ methods. The notable difference in the NZFO average crystallite size between the two nanohybrids is revealed. Raman spectroscopy confirms a slight redistribution of cations over tetrahedral and octahedral sites depending on the synthesis route. Electronic structure analysis exposes the dominant role of the f-MWCNTs matrix. Photoemission and absorption spectra confirm the formation of NZFO/f-MWCNTs composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Munaji, Mochamad Zainuri, Triwikantoro
Summary: A polyaniline/zirconia (PANI/ZrO2) composite was synthesized using an in situ method with HCl as a doping agent, SDBS as a surfactant, and APS as an oxidant. The electrical properties of PANI/ZrO2 were significantly affected by the filler phase, as observed through impedance, dielectric constant, dielectric losses, and electrical conductivity measurements. The amount and types of ZrO2 filler also influenced the morphology and structure of the composite.
Article
Engineering, Electrical & Electronic
Haiyi Peng, Feifei Wang, Huixing Lin, Xiaogang Yao, Huarong Zeng
Summary: In recent years, highly sensitive and flexible pressure sensors have become widely used in the fields of wearable electronics, soft robots, medical monitoring, etc. This study constructed a through-hole structure using multi-walled carbon nanotubes (MwCNTs)/carboxymethyl cellulose (CMC)/polydimethylsiloxane (PDMS) via an ice template method, serving as the dielectric layer of a new flexible capacitive pressure sensor. The sensor demonstrated high sensitivity, stability, low detection limit, and fast response time, making it suitable for human applicability tests and offering promising prospects in wearable electronics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Riki M. McDaniel, Michael S. Carey, Olivia R. Wilson, Michel W. Barsoum, Andrew J. D. Magenau
Summary: This study addresses limitations in the large-scale production of MXene nanocomposites by proposing a simple method of covalently modifying MXenes with isocyanates, enabling their successful dispersion within a hydrophobic matrix. The method is scalable and highly modular, providing a valuable tool for easily quantifying reactive terminations on MXene surfaces and accessing well-dispersed nanocomposites.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Mohannad Naeem, Hsu-Chiang Kuan, Andrew Michelmore, Sirong Yu, Adrian P. Mouritz, Sanjay S. Chelliah, Jun Ma
Summary: A green and novel method was developed for preparing epoxy/graphene nanocomposites by microwave radiation and mechanical stirring, which successfully produced surface-modified graphene platelets without the need for organic solvents and surfactants. The process resulted in exfoliated and well-dispersed graphene platelets with improved mechanical and functional properties of the epoxy resin.
Article
Chemistry, Physical
Yaoning Bai, Xinru Li, Taoyuan Ouyang, Weiyao Wang, Yuwei Yan, Xiaodi Jiang, Xu Wang, Zichen Wang, Xiaoming Cai, Jinming Cai, Zhenhua Ge, Honglin Tan
Summary: In this study, functionalized multi-walled carbon nanotubes (f-MWCNTs) were successfully incorporated into a Bi2S3 matrix using a simple hydrothermal synthesis technique, resulting in improved thermoelectric properties. The inclusion of f-MWCNTs optimized the electrical transport properties of the matrix material, leading to a significantly higher power factor compared to pure Bi2S3. Additionally, the enhanced phonon scattering effect resulted in a lower thermal conductivity for the nanocomposite. The overall thermoelectric merit (ZT) of the Bi2S3+xwt%f-MWCNTs (x = 0.5, 1, 1.5, 2) nanocomposites was improved to varying degrees.
Article
Chemistry, Physical
Mahmoud Al-Gharram, Inshad Jum'h, Ahmad Telfah, Mahmoud Al-Hussein
Summary: Conductive and optically tunable PANI/CoFe2O4 NPs nanocomposite films were successfully prepared by potentiostatic electrochemical polymerization. The addition of CoFe2O4 NPs improved the crystallinity and conductivity of the films, and magnetic hysteresis was observed. These results indicate the potential applications of these nanocomposite films.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Ziyu Lin, Ning Cao, Zhonghui Sun, Wenying Li, Yirong Sun, Haibo Zhang, Jinhui Pang, Zhenhua Jiang
Summary: Confined polymerization is an effective method for controlling the micro-nano structure inside composite materials. With this technique, high PANI content PANI/PEEK composite films have been successfully synthesized, showing potential applications in various fields.
Article
Engineering, Electrical & Electronic
Shaoli Guo, Guoxiang Chen, Junqing Wen, Shuai Liu, Jinfeng Qu, Wanlin He, Lina Song, Bohan Zheng
Summary: Graphene/PANI/CuO ternary nanocomposites were synthesized through hydrothermal reaction and heat treatment, with physical exfoliation of graphite into graphene being the main process. Prolonging the reaction time did not significantly affect graphene exfoliation and electromagnetic wave absorption of the nanocomposites. The synthesized ternary nanocomposite showed promising electromagnetic wave absorption properties, especially for double-layer absorbers.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Karthikeyan Ramachandran, Constance L. Gnanasagaran, Ashwath Pazhani, Vishaal Harikrishna Kumar, M. Anthony Xavior, R. Ram Subramani, T. Arunkumar
Summary: Due to their high strength to weight ratio and high stiffness, composites are potential candidates for aerospace applications. This study focused on the impact behavior of two nanoceramic composites, yttria stabilized zirconia (YSZ) and aluminum oxide (Al2O3), reinforced with multi-walled carbon nanotubes (MWCNTs). The results showed that YSZ composites with 1% MWCNTs demonstrated lower penetration, while alumina reinforced MWCNTs showed higher depth of penetration. The addition of CNTs up to 3% improved the impact behavior of ceramics, but further increase in MWCNTs content resulted in increased penetration values.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Xueliang Wu, Yanmin Wang, Yuansong Xiao, Yongqin Han, Tingxi Li, Yong Ma
Summary: Polyaniline nanotubes with a 3D porous network structure were successfully prepared using facile aqueous solution polymerization and a soft template method. The influence of polymerization conditions on the morphology and chemical structure of PANI was studied, and the formation mechanism of the nanotubes was analyzed using various measurement techniques.
Article
Chemistry, Inorganic & Nuclear
N. C. Nepomuceno, A. A. A. Seixas, E. S. Medeiros, T. J. A. Melo
Summary: The study combines cellulose nanocrystals (CNC) and polyaniline through an in situ polymerization of PANI in CNC suspensions to create a nanostructured material. Results show that particle size, thermal stability and polymerization time increase with CNC concentration, indicating that cellulose nanostructure serves as a backbone for PANI deposition. Additionally, the nanostructured PANI/CNC with a higher content of PANI exhibits a conductivity value of 8.9 x 10(-1) S/cm(-1), showing great potential as an alternative nanostructured material compared to neat polyaniline.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Mohd Sarvar, Shah Masheerul Aalam, Mohd Shahid Khan, Javid Ali
Summary: This study proposes a new technique for improving the efficiency of field emission devices by using metal organic framework composites. The composites, made of multi-walled carbon nanotubes and ZnO, exhibit unique structural features that provide easily available electro active sites, low surface work function, and improved electronic conductivity. The synthesized ZnO@MOF/MWCNTs composite shows impressive and stable field emission properties, providing a simpler way to enhance electron field emission in various field emission display systems based on MOF composites.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Polymer Science
Laura Sisti, Grazia Totaro, Annamaria Celli, Loris Giorgini, Simone Ligi, Micaela Vannini
Summary: In situ intercalative polymerization has been studied to obtain poly(propylene 2,5-furandicarboxylate) and poly(hexamethylene 2,5-furandicarboxylate) nanocomposites with different graphene types and amounts. The results showed that graphene affects crystallization and mechanical properties, while XT500 presents different effects compared to graphene.
Article
Engineering, Electrical & Electronic
Varsha Gautam, Avshish Kumar, Ramesh Kumar, Mushahid Husain, Vinod Kumar Jain, Suman Nagpal
Summary: The reported work presents an ultrafast and ultrasensitive sensing platform for precise and reliable detection of Methyl nicotinate (MN) to diagnose Tuberculosis (TB) at an early stage. The sensor was designed and fabricated using silicon nanowires and titanium dioxide nanoparticles-based nanocomposite, and showed good accuracy and reproducibility.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Mohammad Moeen Hasan Raza, Shah Masheerul Aalam, Mohd Sadiq, Mohd Sarvar, Mohammad Zulfequar, Samina Husain, Javid Ali
Summary: Carbon nanotubes (CNTs) are promising candidates for electron field emission due to their advanced electrical and structural properties. In this study, post-plasma treatment improved the performance of CNT field emitters with attached silver nanoparticles (Ag NPs), reducing turn-on and threshold fields while increasing emission current density. The plasma-treated Ag NPs coated CNT field emitter exhibited better temporal stability and could be a potential candidate for cold-cathode electron field emission applications in vacuum devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Mohammad Moeen Hasan Raza, Shah Masheerul Aalam, Mohd Sadiq, Mohd Sarvar, Mohammad Zulfequar, Samina Husain, Javid Ali
Summary: The structural tuning of vertically aligned carbon nanotube field emitters using ammonia-based dense resonating plasma improved electron field emission properties and temporal stability. This treatment led to the formation of horn type protrusions, influencing electron field emission properties significantly.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Condensed Matter
Anshika Nagar, Avshish Kumar, Utkarsh Tyagi, Hrishikesh Dhasmana, M. A. Majeed Khan, Samina Husain, Abhishek Verma, V. K. Jain
Summary: An ultrafast sensor for trace-level detection of Ammonia gas was developed using hexagonal-shaped ZnO nanoparticles grown through a low-cost green synthesis process. The sensor exhibited excellent response value of 2.5 at 5 ppm NH3 with quick response and recovery times, attributed to the optimum number of oxygen species and active sites on the ZnO NPs.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Analytical
S. Shalvi, Varsha Gautam, Kanak Lata Verma, Avshish Kumar, Vinod Kumar Jain, Suman Nagpal
Summary: This study aims to develop a novel sensor for detecting trace amounts of arsenite (As-III) in human serum by utilizing reduced graphene oxide/gold nanoparticles (rGO/AuNPs) based nanocomposite structure. Under optimized conditions, the sensor demonstrated remarkable sensitivity and stability, with a detection limit of 10 ppb for As-III in standard samples.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Mohd Sarvar, Mohammad Moeen Hasan Raza, Shah Masheerul Aalam, Mohd Sadiq, Mohammad Shahid Khan, Mohammad Zulfequar, Javid Ali
Summary: In this study, multi-walled carbon nanotubes (MWCNTs) were grown on silicon substrate using low-pressure chemical vapor deposition (LPCVD) technique with iron and silver colloidal solutions as catalysts. The concentration of catalysts was found to affect the morphology and properties of the synthesized MWCNTs. MWCNTs catalyzed by Fe-0.025M/Ag-0.100M showed a lower I-D/I-G ratio and stronger electron emission compared to other samples.
Article
Environmental Studies
Virender Sharma, Hrishikesh Dhasmana, Abhishek Verma, Avshish Kumar, C. Kannan, Yash Pal, Shivangi Jha, V. K. Jain
Summary: This study investigates enhanced surface passivation in the existing industrial process line of large area n-type silicon solar cells. The researchers optimize the Rapid Thermal Process (RTP) in the temperature range of 500-900 degrees C and evaluate the devices with respect to regularly processed solar cells. They find that annealing with hydrogenation from a silicon nitride layer improves surface passivation, resulting in significant improvements in effective minority carrier lifetime, implied open circuit voltage, and surface recombination velocity.
ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Mohd Sadiq, M. Ajmal Khan, Mohammad Moeen Hasan Raza, Shah Masheerul Aalam, Mohammad Zulfequar, Javid Ali
Summary: New polymer blend composite electrolytes were prepared using PVA-PEG, NaNO3, and MWCNTs. The addition of MWCNTs improved the ionic conductivity and electrochemical stability of the polymer blend, making it suitable for energy storage device applications.
Article
Materials Science, Multidisciplinary
Mohammad Moeen Hasan Raza, Mohd Sadiq, Shah Masheerul Aalam, Mohd Sarvar, Mohammad Zulfequar, Samina Husain, Javid Ali
Summary: In this study, the influence of growth temperature on the emission stability of CNT field emitters was investigated. The growth and quality of field emitters were controlled by the growth temperature, as confirmed by FESEM micrograph and Raman spectra. The results showed a decrease in the turn-on and threshold fields, as well as an increase in the emission current density, with increasing growth temperature. Furthermore, the emission stability improved with higher growth temperature, possibly due to controlled growth of field emitters and diminished screening effect.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Physics, Condensed Matter
Imran Ahmad Salmani, Mohd. Shahid Khan, Javid Ali, Aurangzeb Khurram Hafiz, Mohd Mehkoom, S. M. Afzal, Mohd Saleem Khan
Summary: This study examines the multiferroic and nonlinear optical properties of pristine and Yttrium (Y3+) substituted BiFeO3 nanoparticles synthesized by sol-gel technique, as well as the thin films of these nanoparticles. Various techniques, including XRD, Fullprof, XPS, AFM, FESEM, and TEM with SAED, were used to study the structure and morphology of the nanoparticles. The doping of Y3+ ions in the nanoparticles significantly modified and improved their optical, structural, and multiferroic properties. The linear optical properties were characterized using UV-Visible, Raman, and Photoluminescence techniques, while the third-order nonlinear absorption coefficient and third-order susceptibility were investigated using a single beam Z-scan technique. The films exhibited saturation absorption behavior, which increased with increasing Yttrium (Y3+) substitution in BiFeO3, making them promising materials for optoelectronic devices.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Environmental Studies
Mohd Sadiq, M. Ajmal Khan, Mohammad Moeen Hasan Raza, Mohammad Zulfequar, Javid Ali
Summary: Biopolymer composite electrolytes were prepared using cellulose acetate, magnesium perchlorate, and different weight percent of Zinc Oxide fillers. The effects of ZnO fillers on electrical and structural properties, as well as ion transference numbers, were investigated. The ionic conductivity of the electrolyte with 40 wt.% ZnO fillers was found to be 8.75x10(-4) S/cm at 30 degrees C. The fabricated cell with this electrolyte exhibited enhanced energy and high-power density, along with 100% capacitance retention and high coulombic efficiency after the 129(th) cycle.
ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Mohd Sarvar, Mohd Yaseen Lone, Shah Masheerul Aalam, Md Faiz Akram, Islam Uddin, Mohammad Shahid Khan, Javid Ali
Summary: Multi-walled carbon nanotubes were grown on a silicon substrate using low-pressure chemical vapor deposition with iron and aluminum as catalysts. Different concentrations of iron in the composite catalysts were found to affect the growth of multi-walled carbon nanotubes. The purpose of adding iron in the catalyst is to increase carbon solubility and diffusion rate, while aluminum can change the catalyst activity temperature and increase carbon yields.
JOURNAL OF NANOPARTICLE RESEARCH
(2023)
Article
Optics
M. A. Majeed Khan, Anees A. Ansari, Wasi Khan, Maqusood Ahamed, Jahangeer Ahmed, Avshish Kumar
Summary: In this study, SWCNTs/MnO2 nanocomposite was prepared by growing MnO2 nanoparticles directly on single-walled carbon nanotubes (SWCNTs) through a hydrothermal process. The nanocomposite was characterized using various techniques, including FESEM, HRTEM, Raman, BET, XPS, FTIR, UV-Vis, photoluminescence, and EIS. The results showed excellent growth of SWCNTs and decoration with MnO2 nanoparticles. The prepared nanocomposite exhibited superior electrochemical performance and photocatalytic activity compared to MnO2 nanoparticles alone, making it a promising material for wastewater treatment.
OPTICS AND LASER TECHNOLOGY
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Pooja Singh, Avshish Kumar, Hrishikesh Dhasmana, Abhishek Verma, Amit Kumar, V. K. Jain
Summary: In this study, a new class of infrared photodetectors comprising zinc oxide nanoparticles and silicon nanowires was reported. The hybrid nanostructure showed a high photoresponse under 1064 nm illumination, and its photo-resistive response was observed to be very fast. This work holds promise for the development of efficient miniaturized NIR detectors.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Energy & Fuels
Mohd Sadiq, Shweta Tanwar, Mohammad Moeen Hasan Raza, Shah Masheerul Aalam, Mohd Sarvar, Mohammad Zulfequar, A. L. Sharma, Javid Ali
Summary: In this study, a nanocomposite blend of polyvinyl alcohol (PVA), polyethylene glycol (PEG), sodium nitrate (NaNO3), and nanofillers, BaTiO3, was synthesized using a solution casting technique. The prepared nanocomposites were characterized for their crystal structure, morphology, and chemical bond formation. The nanocomposites showed suitable ionic conductivity and high electrochemical stability, making them suitable for supercapacitor applications.
