Article
Materials Science, Ceramics
S. Swathi, E. Sunil Babu, R. Yuvakkumar, G. Ravi, Arunachalam Chinnathambi, Sulaiman Ali Alharbi, Dhayalan Velauthapillai
Summary: Photoelectrochemical water splitting using semiconductor materials to generate hydrogen and oxygen is an important method. Synthesized materials can enhance bandgap by controlled size and morphology, improving PEC activity and photoconversion efficiency. Recently, ZnO nanostructures have attracted attention for their multifunctional properties and are considered outstanding for fabrication applications.
CERAMICS INTERNATIONAL
(2021)
Article
Multidisciplinary Sciences
Wiqar Hussain Shah, Azeema Alam, Hafsa Javed, Khadija Rashid, Akhtar Ali, Liaqat Ali, Akif Safeen, Muhammad R. Ali, Naveed Imran, Muhammad Sohail, Gilbert Chambashi
Summary: This study investigated the structural, optical, and dielectric properties of Pure and Mn+2 doped ZnO nanoparticles (Zn1-xMnxO) with x>=20%. The nanoparticles were synthesized using the co-precipitation method and annealed at 450(0)C. Different characterization techniques were employed to analyze the prepared nanoparticles. X-ray Diffraction analysis revealed a hexagonal wurtzite structure for both pure and Mn+2 doped ZnO. The size of the crystallites decreased as the doping concentration increased. Scanning Electron Microscopy showed that the nanoparticles were finely dispersed and had a particle size of 40-50 nm. Energy Dispersive X-ray spectroscopy confirmed the incorporation of Mn(+2) ions in the ZnO structure. UV spectroscopy results indicated a red shift in the band gap as the doping concentration increased, with the band gap changing from 3.3 to 2.75 eV. Dielectric measurements showed a decrease in relative permittivity, dielectric loss factor, and ac conductivity with increasing Mn concentration.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
S. K. Satpathy, U. K. Panigrahi, S. K. Panda, R. Biswal, W. Luyten, P. Mallick
Summary: Nanoparticles of Zn1-xLaxO (x = 0, 0.01, 0.03, and 0.05) were successfully synthesized using a cost-effective chemical method. The influence of La doping on the microstructural, optical, antimicrobial, and magnetic properties of the ZnO nanoparticles was investigated. La doping significantly enhanced the magnetization of ZnO nanorods and had an impact on their antibacterial activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Subhash Sharma, H'Linh Hmok, E. Martinez-Aguilar, Gunjan Srinet, J. M. Siqueiros, O. Raymond Herrera
Summary: In this work, the authors studied the structural, electronic, and magnetic properties of Mn-modified ZnO nanoparticles prepared by a sol-gel route. They used first-principles calculations to describe the electronic and magnetic behavior of different Mn-doped ZnO concentrations. The X-ray diffraction analysis showed that all samples had a wurtzite structure, and the theoretical calculations indicated that 4% and 6% Mn-doped ZnO had more stable structures. Additionally, the bandgap values showed a blue shift with increasing Mn doping concentration, and the magnetic measurements confirmed weak ferromagnetism in all samples, attributed to Mn2+ ions.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
R. Aschwanden, R. Kothernamn, M. Albert, C. Golla, C. Meier
Summary: Silicon oxynitride films grown by plasma-enhanced chemical vapor deposition were investigated, with ammonia found to be the most efficient in achieving high nitrogen content. The balance between adsorption and desorption processes during film growth was studied by examining the growth rate as a function of substrate temperature. Optical properties of the films were thoroughly investigated using spectroscopic ellipsometry, and a parametrized model for the refractive index and extinction coefficient based on Cauchy- and Lorentz-fit was suggested.
Article
Engineering, Electrical & Electronic
Mona A. A. Mohaseba, Ahmed A. A. Aboud
Summary: This study investigated the impact of lead concentration (0-1 wt%) on the physical properties and photo-detection properties of zinc oxide thin films. All films were deposited using Aerosol Assisted Chemical Vapor Deposition (AACVD) techniques and characterized through various methods. X-ray diffraction analysis revealed the formation of single-phase hexagonal ZnO thin films with preferred orientation changes at a Pb concentration of 0.5wt%. The formation of nano-rods was observed in films prepared with 0.5 and 1wt% lead. The band gap values increased with increased Pb doping. The deposited films exhibited high sensitivity to UV light after long exposure.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Xiang Xu, Tingting Zhong, Nian Zuo, Zexin Li, Dongyan Li, Lejing Pi, Ping Chen, Menghao Wu, Tianyou Zhai, Xing Zhou
Summary: In this study, CuCrS2 nanoflakes were successfully synthesized by salt-assisted chemical vapor deposition, demonstrating switchable ferroelectric polarization even at a thickness of 6 nm. The high T-C of around 700 K can be attributed to the robust tetrahedral bonding configurations of Cu cations, with further clarification provided by a theoretically predicted high order-disorder transition barrier and structure evolution from 600 to 800 K. Additionally, interlocked out-of-plane and in-plane ferroelectric domains were observed, leading to the demonstration of two devices based on different polarizations.
Review
Chemistry, Multidisciplinary
Jinhong Du, Bo Tong, Shuangdeng Yuan, Nian Dai, Rui Liu, Dingdong Zhang, Hui-Ming Cheng, Wencai Ren
Summary: This article reviews the recent advances and significant development of CVD-grown graphene towards flexible optoelectronics. The challenges of improving optoelectronic properties, tuning work functions, and controlling interfaces are discussed, and the importance of fabricating large-area devices on flexible substrates is emphasized.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Sergey G. Menabde, In-Ho Lee, Sanghyub Lee, Heonhak Ha, Jacob T. Heiden, Daehan Yoo, Teun-Teun Kim, Tony Low, Young Hee Lee, Sang-Hyun Oh, Min Seok Jang
Summary: The acoustic plasmon mode in a graphene-dielectric-metal structure shows strong light-matter interaction with relatively small propagation loss, allowing for real-space mapping under ambient conditions.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Yuan Zhou, Kasun Fernando, Juanyong Wan, Fangze Liu, Shreetu Shrestha, Jeremy Tisdale, Chris J. Sheehan, Andrew C. Jones, Sergei Tretiak, Hsinhan Tsai, Huihui Huang, Wanyi Nie
Summary: The CVD method was used to grow high quality, large size all-inorganic cesium lead bromide perovskite crystalline film for the first time, exhibiting exceptional optical properties. The growth kinetics revealed that deposition rate and growth temperature are key parameters for achieving large scale crystal growth. This demonstration suggests the potential of CVD grown all-inorganic perovskite thin films for photovoltaic or photo-detector applications.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
F. Mikailzade, H. Tuerkan, F. OEnal, M. Zarbali, A. Goektas, A. Tumbul
Summary: The structure and magnetization of polycrystalline Zn1-xMnxO3 films (0 <= x <= 0.1) grown on glass and Si substrates using Sol-Gel technique have been studied. It has been found that films grown on Si substrates exhibit ferromagnetic properties after thermal annealing while films grown on glass substrates did not exhibit ferromagnetic order even after thermal treatment. This suggests a potential procedure for achieving room temperature ferromagnetism in Mn doped ZnO films on p-type Si substrates for spintronic device applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Kun Ye, Bochong Wang, Anmin Nie, Kun Zhai, Fusheng Wen, Congpu Mu, Zhisheng Zhao, Jianyong Xiang, Yongjun Tian, Zhongyuan Liu
Summary: The high crystallinity one-dimensional Sb2S3 nanowires were grown on SiO2/Si substrates via CVD technique, showing excellent photodetection properties with a broad photoresponse range and outstanding performance indicators, as well as remarkable switch cycling stability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Vishal Saravade, Zahra Manzoor, Alexis Corda, Chuanle Zhou, Ian Ferguson, Na Lu
Summary: This study investigates the optical properties and process-structure-property relationships of Mn-doped zinc oxide grown using metal-organic chemical vapor deposition with varying Mn-doping concentration and growth conditions. The results show that Mn-doping can alter the bandgap and photoluminescence characteristics of ZnMnO.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
E. Kutlu-Narin, P. Narin, A. Yildiz, S. B. Lisesivdin
Summary: The study looked at the effects of magnesium content and growth temperature on the optical and structural properties of magnesium zinc oxide films, finding a linear correlation between magnesium mole fraction and magnesium content in the liquid solution. The peak of the (0002) diffraction for the grown samples shifted to higher angles and became stronger with increasing magnesium content in the liquid solution. Both growth temperature and magnesium content in the liquid solution are crucial parameters in controlling the magnesium mole fraction of the samples.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Luca Lavagna, Mattia Bartoli, Simone Musso, Daniel Suarez-Riera, Alberto Tagliaferro, Matteo Pavese
Summary: In this study, carbon nanotubes (CNTs) were synthesized on an oil-well cement substrate using chemical vapor deposition (CVD) method. The effect of the synthesis process on cement was thoroughly investigated, and FE-SEM, RAMAN, and X-Ray spectroscopy were used to analyze the modifications in the cementitious matrix and the unique morphological features of CNTs.
