Zhi Wang¹, Jinming Cao¹, Zhonglei Liu¹, Yuhong Zhao^1,2,3,*

CMC-Computers, Materials & Continua, Vol.81, No.1, pp. 213-228, 2024, DOI:10.32604/cmc.2024.055169 - 15 October 2024

Abstract Recent years, the polarization response of ferroelectrics has been entirely studied. However, it is found that the polarization may disappear gradually with the continually applied of electric field. In this paper, taking K_0.48Na_0.52NbO₃(KNN) as an example, it was demonstrated that the residual polarization began to decrease when the electric field frequency increased to a certain extent using a phase-field methods. The results showed that the content of out-of-plane domains increased first and then decreased with the increase of applied electric field frequency, the maximum polarization disappeared at high frequencies, and the hysteresis loop became elliptical. In More >

A. Arulmary^1,*, V. Rajamani², T. Kavitha²

Computer Systems Science and Engineering, Vol.46, No.2, pp. 1617-1630, 2023, DOI:10.32604/csse.2023.034681 - 09 February 2023

Abstract The method opted for accuracy, and no existing studies are based on this method. A design and characteristic survey of a new small band gap semiconducting Single Wall Carbon Nano Tube (SWCNT) Field Effect Transistor as a photodetector is carried out. In the proposed device, better performance is achieved by increasing the diameter and introducing a new single halo (SH) doping in the channel length of the CNTFET device. This paper is a study and analysis of the performance of a Carbon Nano Tube Field Effect Transistor (CNTFET) as a photodetector using the self-consistent Poisson… More >

Yuanjia Xia, Fang Zhao^*, Zhizun Li, Zhaogang Cheng, Jianwei Hu

Journal of Renewable Materials, Vol.11, No.2, pp. 921-936, 2023, DOI:10.32604/jrm.2022.022840 - 22 September 2022

Abstract Sn_1−xEr_xO₂ (x = 0%, 8%, 16%, 24%) micro/nanofibers were prepared by electrospinning combined with heat treatment using erbium nitrate, stannous chloride and polyvinylpyrrolidone (PVP) as raw materials. The target products were characterized by thermogravimetric analyzer, X-ray diffrotometer, fourier transform infrared spectrometer, scanning electron microscope, spectrophotometer and infrared emissivity tester, and the effects of Er³⁺ doping on its infrared and laser emissivity were studied. At the same time, the Sn_1−xEr_xO₂ (x = 0%, 16%) doping models were constructed based on the first principles of density functional theory, and the related optoelectronic properties such as their energy band structure,… More >

Yangyang Hao, Yue Liu^*, Guorui Cao^*

Journal of Renewable Materials, Vol.10, No.12, pp. 3505-3519, 2022, DOI:10.32604/jrm.2022.023122 - 14 July 2022

Abstract Aiming to reduce the defects of perovskite film and improve carrier transport, an organic small molecule, benzo [d]isothiazol-3(2H)-one 1,1-dioxide (OBS), is introduced as an additive in the solution-processing of perovskite and prepare uniform perovskite films with a continuous distribution of OBS at grain boundaries. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy are conducted to reveal the interactions of hydrogen bonding and coordination bonding between OBS and perovskite. Various characterizations (including X-ray diffraction, UV-vis spectroscopy, electrochemical impedance spectroscopy, etc.) are conducted to uncover the effect of OBS on device performance. Consequently, high efficiency of 23.26% More > Graphic Abstract

Alexander Lukin^1,*, Oğuz Gülseren²

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.6, pp. 1763-1779, 2022, DOI:10.32604/fdmp.2022.022016 - 27 June 2022

Abstract Carbyne-enriched nanomaterials are of current interest in nanotechnology-related applications. The properties of these nanomaterials greatly depend on their production process. In particular, structural self-organization and auto-synchronization of nanostructures are typical phenomena observed during the growth and heteroatom-doping of carbyne-enriched nanostructured metamaterials by the ion-assisted pulse-plasma deposition method. Accordingly, fine tuning of these processes may be seen as the key step to the predictive designing of carbyne-enriched nano-matrices with improved properties. In particular, we propose an innovative concept, connected with application of the vibrational-acoustic effects and based on universal Cymatics mechanisms. These effects are used to More >

Yadi Qin, Qiyu Weng, Yuqun Zhuo^*

Energy Engineering, Vol.119, No.1, pp. 35-47, 2022, DOI:10.32604/EE.2022.015477 - 22 November 2021

Abstract In order to improve the ability of SCR catalyst to catalyze the oxidation of gaseous elemental mercury, a series of novel Ce modified SCR (Selection Catalytic Reduction, V₂O₅–WO₃/TiO₂) catalysts were prepared via two-step ultrasonic impregnation method. The performance of Ce/SCR catalysts on Hg⁰ oxidation and NO reduction as well as the catalytic mechanism on Hg⁰ oxidation was also studied. The XRD, BET measurements and XPS were used to characterize the catalysts. The results showed that the pore volume and pore size of catalyst was reduced by Ce doping, and the specific surface area decreased with the increase… More >

Shuaishuai Zhu¹, Zhigang Pan^1,2, Yaqiu Tao^1,2,*, Yue Chen^1,2

Journal of Renewable Materials, Vol.8, No.8, pp. 939-946, 2020, DOI:10.32604/jrm.2020.011197 - 10 July 2020

Abstract Hydrogen is recognized as a promising energy scours in the close future. Online hydrogen preparation from formic acid under mild reaction conditions causes extensive interests. Mo₂C and metal (Fe, Ni, Co, K) doped Mo₂C on granular activated carbon (GAC) were prepared and used as heterogeneous catalysts for H₂ generation from formic acid on a fixed bed reactor at 100–250°C. The formic acid conversions on doped Mo₂C-Me/GAC are clearly improved, especially at lower reaction temperatures. Co doping presents outstanding effect on H₂ selectivity and conversion rate compared to Ni and Fe. A 56.3% formic acid conversion was reached on More >

Taeshik Yoon^1,†, Sumin Kang^1,†, Tae Yeob Kang¹, Taek-Soo Kim^1,2,*

CMES-Computer Modeling in Engineering & Sciences, Vol.120, No.2, pp. 351-361, 2019, DOI:10.32604/cmes.2019.06672

Abstract Detection of cracks is a great concern in production and operation processes of graphene based devices to ensure uniform quality. Here, we show a detection method for graphene cracks by electromagnetic induction. The time varying magnetic field leads to induced voltage signals on graphene, and the signals are detected by a voltmeter. The measured level of induced voltage is correlated with the number of cracks in graphene positively. The correlation is attributed to the increasing inductive characteristic of defective graphene, and it is verified by electromagnetic simulation and radio frequency analysis. Furthermore, we demonstrate that More >

Morteza Eslamian^1,2, M. Ziad Saghir^1,3

FDMP-Fluid Dynamics & Materials Processing, Vol.8, No.4, pp. 353-380, 2012, DOI:10.3970/fdmp.2012.008.353

Abstract In this paper recent advances pertinent to the applications of thermodiffusion or thermomigration in the fabrication of micro and nano metal-doped semiconductor-based patterns and devices are reviewed and discussed. In thermomigration, a spot, line, or layer of a p-type dopant, such as aluminum, which is deposited on a semiconductor surface, penetrates into the semiconductor body due to the presence of a temperature gradient applied across the wafer body. The trails of p-doped regions within an n-type semiconductor, in the form of columns or walls, may be used for several applications, such as the isolation of More >