Article
Chemistry, Physical
Aishee Dey, Preetam Guha Ray, Santanu Dhara, Sudarsan Neogi
Summary: This study developed a wet-chemical method using Tween-80 to engineer the optical properties of pure ZnO nanoparticles, enabling excitation at visible range and exhibiting good cytocompatibility and antibacterial properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Jositta Sherine, Emayavaramban Indubala, Harsh Anish, Harinipriya Seshadri
Summary: ZnO nanorods were capped with aliphatic, aromatic, and heterocyclic amino acids to study the effects on various properties. Coordination complexes between amino acids and ZnO were confirmed by XRD, XPS, and FTIR, with the nanometer range of the complexes explicitly indicated by a binding energy difference of 23 eV. The ZnO-D-Ala and ZnO-DL-Ala complexes showed reduced band gaps and potential as n-type semiconductor materials for optoelectronic applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Saikat Chattopadhyay, Ashok Kumawat, Kamakhya Prakash Misra, Nilanjan Halder, Atul Bandyopadhyay, Albin Antony, Ashok Rao, P. Poornesh, J. Jedryka, K. Ozga, B. Kucharska, R. D. K. Misra
Summary: The study explored the non-linear behavior of Ce-doped ZnO system and observed that increasing Ce dopant concentration led to a significant increase in second harmonic generation (SHG) signal intensity in ZnO nanoparticles. The SHG signal intensity was governed by micro-strain, increasing with decreasing micro-strain. The dependence of ZnO morphology and SHG intensity on Ce dopant concentration in ZnO has potential applications in bio-imaging and bio-sensing.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Laya Dejam, Slawomir Kulesza, Jamshid Sabbaghzadeh, Atefeh Ghaderi, Shahram Solaymani, Stefan Talu, Miroslaw Bramowicz, Mitra Amouamouha, Amir Hossein Salehi Shayegan, Amir Hossein Sari
Summary: In this study, thin films of undoped ZnO, ZnO doped with Al, ZnO doped with Cu, and co-doped ZnO with Al and Cu were deposited on quartz substrates using RF sputtering. The samples were investigated for their advanced fractal features, crystalline structure, and optical properties. The results showed that the films had different morphologies and transmission spectra, with the co-doped sample exhibiting the highest transparency in the visible region and a desirable band gap.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Physical
Cuiyuan Chai, Hong Liu, Weiwei Yu
Summary: The study shows that strain can achieve tunable band structures and optical properties of Fe, Co, Ni and Cu doped ZnO monolayer, such as indirect-direct band gap transition, shrink and enlargement of band gaps. This indicates a possible new route for tailoring the electronic properties of ultrathin nanofilms through strain engineering.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Noor Zamin Khan, Sayed Ali Khan, Li Zhan, Abdul Jalil, Jahangeer Ahmed, M. A. Majeed Khan, Muhammad Tahir Abbas, Feihong Wang, Xin Xu
Summary: Novel tunable-color emitting phosphors with double perovskite structure, synthesized via high-temperature solid state reaction, exhibit intensive intrinsic emission under UV light excitation, which can be efficiently tuned to different colors through doping Bi3+ and Eu3+.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
S. Aydin
Summary: In this study, the effects of Ho-doping rate on the electronic and optical properties of ZnO films were analyzed using First Principles calculations. The band structure, optical properties, and density of states of different Ho-doped ZnO samples were calculated and compared. The results showed that the band gap first decreased and then increased with increasing Ho content, and the optical properties of Ho-doped ZnO exhibited blue shift and red shifts in various characterizations. The calculations confirmed that Ho-doping could heal ZnO and were consistent with experimental results.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Buse Unlu, Milad Ghasemi, Selcuk Yerci, Cicek Boztug
Summary: This study introduces a method for fabricating tensilely strained germanium microstructures using a room-temperature physical vapor deposition technique. The method involves a single rapid thermal annealing process to crystallize the germanium microstructures via liquid phase epitaxy and transform the capping layer into a stressor. The dimensions and strain levels of the microstructures can be easily adjusted by varying the duration of the wet etching processes.
ACS APPLIED NANO MATERIALS
(2022)
Article
Optics
Smruti Medha Mishra, Biswarup Satpati
Summary: ZnO nanorods were synthesized using a low-cost and low-temperature chemical synthesis method, with both ZnO and metal serving as the seed layer. The addition of gold nanoparticles on the surface of ZnO structures enhanced their visible emissions. The optical band gap of the Au-ZnO heterostructure was found to be lower than that of ZnO nanorods, and the band gap energy can be tuned, which is important for room temperature optical devices.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Multidisciplinary
Shadia J. Ikhmayies
Summary: Coral-like micro/nano zinc oxide thin films were successfully synthesized on glass substrates using a low-cost spray pyrolysis method. The films exhibited polycrystalline structure with hexagonal (wurtzite) structure and contained Cl in addition to Zn and O. The non-catalyst production method may have potential applications in nanoelectronic devices, optoelectronics, sensors, nanoscale mechanics research, and solar cells.
Article
Materials Science, Ceramics
Reziwanguli Yantake, Palidan Aierken, Taximaiti Yusufu, Shihang Zhou, Aierken Sidike
Summary: In this paper, a series of broadband cyan phosphors were prepared and characterized. The K0.96AlSiO4:0.04Ce(3+) phosphor showed the highest emission intensity and wide emission spectrum suitable for commercial LED applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Sk Irsad Ali, Dhanadeep Dutta, Atis Chandra Mandal
Summary: Powdered cadmium substituted tin oxide (Sn1-xCdxO2) nanoparticles (NPs) with various Cd2+ ion concentrations (0%-30%) were synthesized via sol-gel route. The nanocrystallinity of the samples was confirmed by X-ray diffraction (XRD) and high resolution transmission electron microscopic (HRTEM) results. Analysis showed that as the Cd2+ substitution concentration increased, lattice strain decreased and crystallite size increased. The presence of cadmium ion in the Cd-substituted SnO2 powder NPs was confirmed by energy dispersive X-ray spectroscopic (EDS) studies. The study also revealed that the band gap energies (Eg) of the Cd-substituted SnO2 NPs decreased with the increase in Cd2+ substitution levels.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Multidisciplinary Sciences
Xuezhi Ma, Qiushi Liu, Ning Yu, Da Xu, Sanggon Kim, Zebin Liu, Kaili Jiang, Bryan M. Wong, Ruoxue Yan, Ming Liu
Summary: Optical transmission and scattering spectroscopic microscopy is limited by the diffraction limit of light, but a super-resolution hyperspectral imaging technique has been developed to achieve 6 nm spatial resolution in single-walled carbon nanotubes. This technique allows for measurement of optical electronic transitions and chiral indices in nanomaterials.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Feng-Xian Jiang, Gui-Zhi Zhang, Li-Fei Ji, Ling-Mei Zhao, Xiao-Hong Xu
Summary: ZnO films co-doped with Cr and N were successfully fabricated and characterized in terms of their structure and optical properties. It was found that the electrical and optical characteristics of the films can be tuned by doping with Cr and N, but excessive Cr doping degrades the crystal quality of the films.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Y. K. Abeykoon, A. A. I. Lakmal, M. A. H. M. Munasinghe, B. S. Dassanayake, N. Gunawardhana
Summary: The effect of seed layer thickness on the properties of ZnO nanowires grown by chemical bath deposition was investigated. The nanowires exhibited hexagonal structure and preferred orientation on different seed layer thicknesses. SEM analysis showed that all nanowires had a vertical orientation, while their diameter ranged from 47 to 100 nm and length ranged from 1.03 to 1.78 μm. The band gap of the ZnO nanowires decreased with decreasing seed layer thickness. The optimal response for H-2 gas sensing was achieved with a seed layer thickness of 35 nm.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
K. Lakshmanamoorthy, S. Manivannan
Summary: Three different ionic liquids based on 1-butyl-3-methylimidazolium were prepared for synthesizing Ag/AgX-rGO nanocomposites, displaying excellent photocatalytic properties, with the samples containing Ag/AgX structures showing enhanced efficiency. The plasmonic silver in Ag/AgX-rGO samples increased sunlight utilization, while rGO facilitated rapid charge separation, resulting in higher dye degradation efficiency.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Gonzalo Abarzua, Rednam Udayabhaskar, Ramalinga Viswanathan Mangalaraja, Jorge Durango-Petro, Jonathan Usuba, Host Flies
Summary: This study assessed the viability of spray coating as a cost-effective and reliable technique for fabricating solid oxide fuel cells (SOFCs). The compatibility of materials and the variations in coating thickness and morphology were analyzed, confirming the potential of this technique.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Susmitha Balagopalan, I. Abdul Rasheed, Hemant Sharma, Inder Mohan Chhabra, Mahender Kumar Gupta, P. Manimaran, B. Karthikeyan
Summary: Optical component fabrication requires precise polishing and lapping methods, which depend on the application and desired properties. This study investigates the surface roughness of fused silica glass samples using fractal and multifractal analysis, with different matrix and abrasive combinations. The average roughness was measured using white light interferometry, and images were captured using a field emission scanning electron microscope (FESEM).
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
D. Naveena, R. Dhanabal, A. Chandra Bose
Summary: This study analyzes the properties of undoped and La doped CuO thin films and finds that 6 wt% of La doped CuO thin films exhibit high optical absorption and low resistivity, making them suitable as absorber material for solid state solar cells.
Article
Physics, Condensed Matter
N. Chidhambaram, S. Senthil Kumari, W. Nirmala, S. Gobalakrishnan, T. Arun, R. Udayabhaskar, Mauricio J. Morel
Summary: This study presents an insightful investigation on the integrative impact of tin and graphene on the physical features of ZnO-Sn@Graphene nanopowders. The results demonstrate that the in situ synthesis strategy restricts the growth of nanoparticles on graphene sheets, resulting in dispersed semiconductor nanoparticles. Additionally, the amalgamation of ZnO-Sn with graphene significantly reduces the optical bandgap value and enhances the efficiency of photogenerated charge carriers separation and photoluminescence quenching.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Analytical
S. Devendiran, A. Kalai Priya, D. Sastikumar
Summary: The newly proposed fiber optic gas sensor shows excellent gas sensitivity and selectivity, particularly towards acetone gas. Different gas concentrations exhibit distinct characteristics in terms of output light intensity in various modes. The sensor demonstrates a significantly higher sensitivity in evanescent mode compared to transmission mode.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Spectroscopy
T. Pandiyarajan, R. Mangalaraja, B. Karthikeyan, R. Udayabhaskar, David Contreras, Selene Sepulveda-Guzman, M. A. Gracia-Pinilla
Summary: Rare earth doped ZnO nanostructures were prepared via wet chemical precipitation, showing morphological transitions and unique characteristics. XRD measurements revealed highly crystalline nature and no alteration in crystal structure by RE doping, while Raman spectra exhibited energy shifts and intensity variations. The enhanced photocatalytic activity and different decolorization efficiencies of MB were observed in RE doped ZnO compared to bare ZnO.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Energy & Fuels
Biny R. Wiston, Praveena Prabhakaran, M. Ashok
Summary: Attaining high specific energy and detaining the specific power achieved is a significant challenge in modern era supercapacitors. This study proposes a method of incorporating conductive iron (Fe) species with nickel hydroxide matrix to form a LDH structure, solving the challenge. The optimal composition exhibits excellent specific capacity and cycling performance, and is successfully applied in a symmetric supercapacitor, achieving high specific energy and specific power.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Krishnamoorthy Shanmugaraj, Ramalinga Viswanathan Mangalaraja, Cristian H. Campos, Dinesh Pratap Singh, R. Udayabhaskar, Santiago Bedoya, Radhamanohar Aepuru
Summary: This work reports the synthesis of PtNPs-TiO2NTs catalyst, which exhibits high catalytic efficiency and operational stability in the reduction of AZB dye.
Article
Physics, Multidisciplinary
P. Vipin, R. Sankaranarayanan
Summary: The dynamics of a Brownian particle in Morse potential under thermal fluctuations is investigated by numerically integrating the corresponding Langevin equation. The dependence of Kramer's rate on temperature and viscosity of the medium is studied by mean first passage time. An approximate analytical expression for the rate constant is found and it shows a temperature dependent pre-factor for the Arrhenius equation. Numerical simulations are consistent with the analytical approximations.
PRAMANA-JOURNAL OF PHYSICS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Rekha Pilliadugula, N. Gopalakrishnan
Summary: beta-Ga2O3 powders were synthesized by calcinations of GaOOH powders obtained through a hydrothermal method. The powders exhibited sensitive surface morphologies and optical properties to CO2 gas.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Devika Mahesh, John Paul, M. C. Santhosh Kumar
Summary: This study investigates the photocatalytic activity of ZnO seed layers and 1D nanorods on Methylene Blue dye. ZnO thin films are used as seed layers to grow 1D nanorods, and their structural properties are characterized. The photoluminescence spectra show a broad emission in the visible region, and the photocatalytic experiment demonstrates that nanorods exhibit better activity compared to the seed layers.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
S. Mohamed Manjoor Shaib Maricar, D. Sastikumar, P. Reddy Vanga, M. Ashok
Summary: In this study, molybdenum trioxide (MoO3) with long micro sheets morphology was synthesized using clad-modified fiber optic gas sensor technique, and their gas sensing characteristics were characterized. The results showed that the synthesized material exhibited good gas response to methanol at room temperature. The gas sensing mechanism was also discussed.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
E. P. Shuaib, Gaurav Kumar Yogesh, D. Sastikumar
Summary: In this study, amorphous and crystalline SiC nanoparticles were successfully synthesized in water and ethanol through laser ablation, and their properties and photoluminescence characteristics were revealed through spectroscopic analysis.
MATERIALS TODAY-PROCEEDINGS
(2022)
