Article
Chemistry, Physical
A. G. Abd-Elrahim, Doo-Man Chun
Summary: ZnO-graphene nanosheet photoanodes were deposited at room temperature using a kinetic spray process, and were utilized for PEC water splitting. The hybrid photoanode with 50 wt% graphite content showed the smallest band gap and lowest emission intensity, demonstrating superior photoelectrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Guosheng Li, Zhipeng Xie, Shuming Chai, Xiong Chen, Xinchen Wang
Summary: The study presents a new method to synthesize PCN nanosheets by adding a reusable ammonia decomposition catalyst, leading to the successful fabrication of holey CNS with higher surface area and more active sites. This approach promotes charge transfer ability and enhances solar driven H-2 evolution performance.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Siqi Li, Songwei Zhang, Dejun Dai, Tao Li
Summary: A simple one-step approach was developed to construct metal-organic framework (MOF)@polymer core-shell composite particles using commercially available small-molecule reagents. The polymer chains elongate during polymerization to increase MOF/polymer interfacial interaction, leading to the adsorption of a random copolymer onto the MOF surface and resulting in a uniform polymer coating on the MOF. These MOF@polymer composite particles with tacky polymer surface can further be assembled into highly ordered monolayer composite thin films through the Langmuir-Blodgett technique.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Swati Sharma, Akanksha Adaval, Shiva Singh, Pradip K. K. Maji, Cherumannil Karumuthil Subash, Valiyaveetil Haneefa Shafeeq, Arup R. R. Bhattacharyya
Summary: The present study develops a graphene oxide (GO) incorporated poly(vinyl alcohol) (PVA) nanocomposite hydrogel with higher mechanical stability for triboelectric applications. By adopting high-shear solution mixing followed by solvent exchange, the nanocomposite hydrogel exhibits dense and undulated microstructures with increased GO concentration. The robust gel formation in the PVA/GO nanocomposite hydrogel is a result of enhanced intermolecular H-bonding between PVA and oxygenated groups of GO. The nanocomposite hydrogels also show improved hardness, Young's modulus, and dielectric properties, making them suitable for triboelectric applications.
Article
Chemistry, Multidisciplinary
S. -C. Wang, P. -Y. Lee, C. -S. Hsu, H. -M. Chen, C. -W. Tung, C. Kongvarhodom, L. -Y. Lin, H. -C. Chen
Summary: In this study, ammonium tetrafluoroborate (NH4BF4) was used as a structure directing agent to design a series of zeolitic imidazolate framework-67 (ZIF67) derivatives as electroactive materials for battery and supercapacitor hybrids. The ratio of 2-methylimidazole and NH4BF4 has a significant influence on the composition and surface properties. The optimal ZIF67 derivative exhibits a high specific capacitance and can be assembled into a battery and supercapacitor hybrid with high energy density and cycling stability.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Polymer Science
Valeria Allizond, Giuliana Banche, Matteo Salvoni, Mery Malandrino, Claudio Cecone, Anna Maria Cuffini, Pierangiola Bracco
Summary: Nanofibers, prepared using a simple electrospinning method, containing silver nanoparticles were found to have antimicrobial activity against Staphylococcus epidermidis and Escherichia coli. The release of silver nanoparticles was more efficient in PLA/PEO nanofibers compared to PLA nanofibers. These electrospun mats show potential for biomedical applications, especially in wound dressing to prevent infections.
Article
Environmental Sciences
Gao-yu Zhao, Hai-yan Li, Yu Yang, Qing-hua Zhao, Ting-ting Su, Jiang-li Ma
Summary: This paper reports a rapid and facile one-step method for the successful preparation of PhC2Cu nanowires, which exhibit higher photocatalytic activity compared to those prepared by the traditional two-step method. This remarkable progress holds promise for the large-scale and efficient preparation of PhC2Cu with high photocatalytic activity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Electrochemistry
Jiahong Liu, Guoze Yang, Kuanbin Lu, Chenxin Ye, Ying Ma, Jianshan Ye
Summary: The use of manganese-assisted laser-induced multi-layer graphene-like carbon (MLIGC) technology allows for the production of high-performance supercapacitors. By treating poly(m-phenylene isophthalamide) (PMIA) papers with a modifier (KMnO4), uniform dispersion of manganese oxide nanoparticles is achieved, resulting in improved surface properties. The hybrid structure of manganese oxide nanoparticles inside multi-layer graphene-like carbon (LIGC) enables a breakthrough in capacity while maintaining excellent cycling stability.
ELECTROCHIMICA ACTA
(2024)
Article
Polymer Science
Yuanyuan Xue, Anna Marie LaChance, Jingjing Liu, Maria Farooqui, Marina D. Dabaghian, Fuchuan Ding, Luyi Sun
Summary: Polymer nanocomposites containing alpha-Zirconium phosphate (Zr(HPO4)2) (ZrP) nanosheets were prepared and investigated for their properties. The ZrP nanosheets were well distributed and oriented in a polyvinyl alcohol (PVA) matrix. The coated PLA films showed high clarity even with a high percentage of ZrP nanosheets. The resulting nanocomposites exhibited improved barrier properties and mechanical strength compared to neat PVA.
Article
Chemistry, Analytical
Shuangchen Jiang, Shuangfeng Wan, Hong Du, Chenchen Lin, Xucong Lin
Summary: Efficient synthesis strategy was developed to fabricate high-performance GO/POSS composite-coated fiber via ultra-fast UV polymerization, which exhibited superior extraction performance for PCMs in comparison to commercial fibers and other fibers.
ANALYTICA CHIMICA ACTA
(2022)
Article
Materials Science, Multidisciplinary
Ashwani Kumar Singh, Jagdees Prasad, Ajit Kumar, Amit Srivastava, Uday P. Tyagi, Brijmohan Prajapati, Kedar Singh
Summary: The development of electronic devices has led to electromagnetic interference (EMI) pollution. This study proposes a graphene-based material, MoS2-rGO/ZnO ternary nanostructure, with improved shielding performance in X-band frequencies through absorption. The synthesized ternary nanocomposite exhibits outstanding EM wave absorption and dissipation capabilities, attributed to the combined effects of various relaxations and polarizations. The incorporation of ZnO nanoparticles in the MoS2-rGO composite enhances the shielding effectiveness, making it suitable for widespread applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Applied
Xinyi Wang, Bin Zhou, Di Wu, Xiaojuan Chen, Bin Li, Ling Wang, Hongshan Liang
Summary: In this study, a stabilization system was developed for NOB nanocrystals through an anti-solvent method combined with ultrasonic treatment. The introduction of metal-phenolic networks enhanced the stability of the nanocrystals, which showed promising results in terms of stability, acid resistance, and release properties. This work provides a potential solution for improving the storage and delivery of hydrophobic crystalline bioactive components.
Article
Chemistry, Multidisciplinary
Alexandra I. Zvyagina, Alexey E. Alexandrov, Alexey A. Averin, Ivan N. Senchikhin, Maxim R. Sokolov, Alexander A. Ezhov, Alexey R. Tameev, Maria A. Kalinina
Summary: A one-step protocol for interfacial self-assembly of graphene oxide (GO), glutamine-substituted perylene diimide (PDI-glu), 10,12-pentacosadiynoic acid (PCDA), and zinc acetate into three- and four-component hybrid nanofilms was developed. The assembled hybrids showed light-induced energy transfer and high stability, making them suitable for organic electronics. The method can be extended to other organic chromophores and surfactants to create multicomponent functional GO-based nanohybrids.
Article
Chemistry, Physical
Jiheng Ding, Hongran Zhao, Haibin Yu
Summary: The study developed a method to synthesize edge-selective sulfonic-acid functionalized graphene (ESfG) with high yield, which showed a thermal conductivity of 3.11 W/mK in water-based nanofluids, the highest recorded to date. The ESfG aqueous nanofluids exhibited much higher heat transfer capability compared to water and also demonstrated high storage stability, making it a promising candidate for high-performance thermally conductive nanofluids in efficient thermal management applications.
Article
Chemistry, Multidisciplinary
Aisha Okmi, Xuemei Xiao, Yue Zhang, Rui He, Olugbenga Olunloyo, Sumner B. Harris, Tara Jabegu, Ningxin Li, Diren Maraba, Yasmeen Sherif, Ondrej Dyck, Ivan Vlassiouk, Kai Xiao, Pei Dong, Baoxing Xu, Sidong Lei
Summary: This study reports a newly observed free-standing graphene-water membrane structure, which replaces the conventional solid-state supporting media with liquid film to sustain the graphene integrity and continuity. Experimental observation, theoretical model, and molecular dynamics simulations consistently indicate that the high surface tension of pure water and its large contact angling with graphene are essential factors for forming such a membrane structure.
Article
Materials Science, Multidisciplinary
C. M. Yap, K. Ansari, S. Xiao, S. Y. Yee, R. Chukka, D. S. Misra
DIAMOND AND RELATED MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Soumyendu Roy, Reeti Bajpai, Ronit Popovitz Biro, Hanoch Daniel Wagner
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Materials Science, Composites
Amit Kumar Sonker, Soumyendu Roy, Hanoch Daniel Wagner, Alla Zak, XiaoMeng Sui, Reeti Bajpai
Summary: The study investigated the combined effect of crosslinking and dual reinforcement on the thermal and mechanical properties of PVA. It was found that using dual reinforcement led to significant improvements in tensile strength and toughness of the composite material.
POLYMER COMPOSITES
(2021)
Article
Electrochemistry
Sudipta Choudhury, Soumyendu Roy, Gourav Bhattacharya, Sam Fishlock, Sujit Deshmukh, Sangita Bhowmick, James McLaughlign, Susanta Sinha Roy
Summary: Disposable devices for sensing biomarkers like Na+ ion in sweat were developed using UV-Ozone treated laser-induced graphene electrodes, which showed better performance compared to pristine LIG and screen-printed carbon electrodes.
ELECTROCHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Reeti Bajpai, Soumyendu Roy, Sandeep Verma
Summary: This article presents a simple and fast method for synthesizing nanoflakes/nanoplatelets of transition metal dichalcogenides, such as MoS2, WS2, and VS2. The method involves mixing a transition metal source, a sulfur source, and multiwall carbon nanotubes in a mortar and pestle, and heating in a microwave oven. The synthesized nanomaterials exhibit mixed semiconducting and metallic phases and show impressive electrocatalytic activity.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jyoti Raghav, Tanvi Agarkar, Ashvani Kumar, Soumyendu Roy
Summary: Hierarchical flower-like structures of nanoneedles of ternary metal oxides (MCC) were synthesized on nickel foam using a simple hydrothermal technique. The synthesis involved varying concentrations of manganese and copper, and the products were characterized using X-ray photoelectron spectroscopy, X-ray diffraction, and scanning electron microscopy. Electrochemical studies showed that the MCC electrodes exhibited better performance compared to mono and bimetallic oxide electrodes, attributed to synergistic effects between the metals. The best performing MCC electrode demonstrated a specific capacitance of 1607 F/g at a scan rate of 5 mV/s, with a capacitance retention of 98.33% after 2800 charge-discharge cycles. A symmetric device fabricated using the MCC electrode achieved an energy density of 37 W h/kg at a power density of 228 W/kg.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Energy & Fuels
P. Rosaiah, S. Vadivel, Nunna Guru Prakash, Merum Dhananjaya, Bandar Ali Al-Asbahi, Soumyendu Roy, U. Chalapathi, Si-Hyun Park
Summary: Nowadays, there is a constant demand for the development of energy storage materials using advanced methodologies. In this study, a large-scale environmentally friendly synthesis was used to prepare Ni-Co-layered double hydroxide (LDH) composites for asymmetric supercapacitors. The developed materials had a flower-like porous architecture with low dimensional layers and a large surface area. The Ni-Co/LDH composite electrodes showed impressive specific capacitance and maintained their performance even at high current densities. Furthermore, an asymmetric supercapacitor with Ni-Co/LDH composites demonstrated excellent energy density.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Review
Crystallography
Devi Shanker Misra
Summary: This review presents the X-ray topography results of different types of single crystal diamonds (SCDs). Dislocations and dislocation bundles are observed in all types of SCDs except for type IIa high-pressure, high-temperature (HPHT) SCDs. HPHT type IIa SCDs have shown advancements in growth technology with minimal dislocations. However, only a few groups have perfected the HPHT growth process of type IIa SCDs. There is a distinctive difference in the type of dislocations present in HPHT type Ib SCDs and chemical vapor deposited (CVD) SCDs.
Article
Chemistry, Physical
Jyoti Raghav, Deepak Deepak, Susanta Sinha Roy, Soumyendu Roy
Summary: Hybrid nanostructures of quaternary-composite metal oxide catalyst consisting of silver oxide nanodots over flower-like nanostructures of ternary metal oxide (MnCoCuOx) were synthesized by a hydrothermal method, followed by DC magnetron sputtering. The synthesized catalyst with 45 W sputter decorated silver oxide nanodots over MnCoCuOx showed the best OER performance with an overpotential of 83 mV, Tafel slope of 65 mVdec-1, ECSA of 826 cm2, mass activity of 143.7 A g-1, and a TOF of 0.039 s-1. The symmetric device fabricated using the best performing electrode achieved efficient water splitting activity, with a current density of 10 mA/cm2 at 1.37 V vs RHE.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Energy & Fuels
B. Poornaprakash, Peddathimula Puneetha, A. Subba Reddy, P. Reddy Prasad, M. Siva Pratap Reddy, Ammar M. Tighezza, P. Rosaiah, Sambasivam Sangaraju, Si-Hyun Park, B. Purusottam Reddy, Soumyendu Roy, Y. L. Kim
Summary: In this study, high-quality ZnO and ZnO:Er nanorods were synthesized using a solvothermal route. The substitution of Er ions into the ZnO matrix was confirmed, leading to a slight decrease in the optical band gap and fluorescence efficiency. The ZnO:Er nanorods exhibited efficient H-2 evolution under UV light illumination.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Beng Kang Tay, Qinyu Kong, Laurence Bodelot, Berengere Lebental, Devi Shanker Misra
2018 IEEE 8TH INTERNATIONAL NANOELECTRONICS CONFERENCES (INEC)
(2018)
Article
Chemistry, Multidisciplinary
L. Jain, K. V. Mani Krishna, Aditya Prasad, H. K. Mehtani, D. S. Misra, Abha Misra, I. Samajdar
CRYSTAL GROWTH & DESIGN
(2017)
Article
Nanoscience & Nanotechnology
Soumyendu Roy, Moshe David-Pur, Yael Hanein
ACS APPLIED MATERIALS & INTERFACES
(2017)
Article
Crystallography
L. Jain, D. R. Mohapatra, R. Basu, D. S. Misra, Abha Misra, I. Samajdar
CRYSTAL RESEARCH AND TECHNOLOGY
(2017)
Article
Chemistry, Multidisciplinary
L. Jain, Reeti Bajpai, Ritwik Basu, Devi Shanker Misra, Indradev Samajdar
CRYSTAL GROWTH & DESIGN
(2017)
