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2023 Advances in science and engineering Technology International Conferences, ASET 2023

作者： Alashkar, Adnan Ayoub, Mohamad Ali Al-Alami, Abdul Hai Abdelkareem, Mohammad Ali Olabi, Abdul Ghani Mdallal, Ayman American University of Sharjah Materials Science and Engineering PhD Program Sharjah United Arab Emirates University of Sharjah Sustainable and Renewable Energy Engineering Sharjah United Arab Emirates

ISBN: (纸本)9781665454742

The search for novel multi-functional material has been on the rise for the past decades. These materials ought to possess flexible structures and tunable properties in order to be utilized for a variety of applications. Perovskite materials are predominantly used in solar cell applications due to their broad absorption spectrum, long carrier lifetime, and long transport distance of electrons and holes. Nevertheless, their unique and tunable properties allow for their utilization in a wide range of applications. In this work, a review on the application of perovskite materials in hydrogen production, supercapacitors, and optoelectronic devices is presented. The role of perovskite in the improvement of said applications is investigated, and future outlook and remarks are presented. This paper highlights the potential utilization of perovskite material outside the scope of photoelectric devices and solar cells. © 2023 IEEE.

关键词： Perovskite

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An ultraefficient surface functionalized Ti3C2Tx MXene piezocatalyst: synchronous hydrogen evolution and wastewater treatment

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Journal of materials Chemistry A 2023年第6期12卷 3340-3351页

作者： Lai, Sz-Nian Chen, Winston Yenyu Yen, Chao-Chun Liao, Yin-Song Chen, Po-Han Stanciu, Lia Wu, Jyh Ming Department of Materials Science and Engineering National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan PhD Program in Prospective Functional Materials Industry National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan High Entropy Materials Center National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan Tsing Hua Interdisciplinary Program National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan School of Materials Engineering Purdue University 610 Purdue Mall West LafayetteIN47907 United States Department of Materials Science and Engineering National Chung Hsing University 145 Xingda Road Taichung402 Taiwan

The Ti3C2Tx surface contains hydroxyl groups that can be modified through self-assembled monolayers by using (3-chloropropyl) trimethoxysilane (CPTMS) and fluoroalkylsilane (FOTS). This study demonstrates that an ultrahigh level of piezoelectricity can be achieved by modifying the Si-O bond of organo-silane headgroups in Ti3C2Tx. The theoretical calculation of surface functionalized Ti3C2Tx-FOTS reveals that its Si-O bond causes localized lattice distortion and enhances the noncentrosymmetric structure on the Ti3C2Tx surface. Ti3C2Tx-FOTS exhibits significantly higher butterfly loops than pristine Ti3C2Tx. The calculated rate constant of Ti3C2Tx-FOTS for dye degradation was 0.9 min−1, 15-fold higher than that of Ti3C2Tx-CPTMS and 111-fold higher than that of pristine Ti3C2Tx. The hydrogen evolution rate of Ti3C2Tx-FOTS is 900.46 μmo1 g−1 h−1, three times higher than that of Ti3C2Tx. The bifunctional surface functionalized Ti3C2Tx-FOTS can simultaneously catalyse the hydrogen evolution reaction (HER) and decomposition of wastewater, demonstrating that Ti3C2Tx-FOTS, obtained through the surface engineering of Ti3C2Tx, is a superior piezocatalyst. © 2024 The Royal Society of Chemistry.

关键词： Rate constants

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An expandable chamber for safe brain retraction: new technologies in the field of transcranial endoscopic surgery

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Journal of Zhejiang University-science B(Biomedicine & Biotechnology) 2023年第4期24卷 326-335页

作者： Elena ROCA Anna GOBETTI Giovanna CORNACCHIA Oscar VIVALDI Barbara BUFFOLI Giorgio RAMORINO Head and Neck Department NeurosurgeryIstituto Ospedaliero Fondazione Poliambulanza25124 BresciaItaly Technology for Health PhD Program University of Brescia25124 BresciaItaly Materials Science and Technology at Department of Mechanical and Industrial Engineering University of Brescia25123 BresciaItaly Metallurgy at Department of Mechanical and Industrial Engineering University of Brescia25123 BresciaItaly Anatomy and Physiopathology Division Department of Clinical and Experimental SciencesUniversity of Brescia25123 BresciaItaly

Neurosurgery is a highly specialized field:it often involves surgical manipulation of noble structures and cerebral retraction is frequently necessary to reach deep-seated brain *** are still no reliable methods preventing possible retraction *** objective of this study was to design work chambers well suited for transcranial endoscopic surgery while providing safe retraction of the surrounding brain *** chamber is designed to be inserted close to the intracranial point of interest;once it is best placed it can be *** should guarantee an appreciable workspace similar to that of current neurosurgical *** experimental aspect of this study involved the use of a force sensor to evaluate the pressures exerted on the brain tissue during the retraction *** pterional craniotomy,pressure measurements were made during retraction with the use of a conventional metal spatula with different *** that,although the force values necessary for retraction and exerted on the spatula by the neurosurgeon are the same,the local pressure exerted on the parenchyma at the edge of the spatula at different inclinations varied greatly.A new method of cerebral retraction using a chamber retractor(CR)has been designed to avoid any type of complication due to spatula edge overpressures and to maintain acceptable pressure values exerted on the parenchyma.

关键词： Brain retraction Spatula Brain retractor design Brain retraction injury Retraction complication Transcranial endoscopic surgery

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The Scalability of Third Generation Photovoltaics: Deposition Techniques and Modularity

The Scalability of Third Generation Photovoltaics: Depositio...

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2023 Sharjah International Conference on Physics of Advanced materials, SICPAM 2023

作者： Ayoub, Mohamad Alashkar, Adnan Mdallal, Ayman Ibrahim, Taleb Khamis, Mustafa Alami, Abdul Hai Sustainable and Renewable Energy Engineering Department University of Sharjah Sharjah27272 United Arab Emirates PhD Program in Materials Science and Engineering American University of Sharjah Sharjah26666 United Arab Emirates Department of Chemical Engineering American University of Sharjah Sharjah26666 United Arab Emirates Department of Biology Chemistry and Environmental Sciences College of Arts and Sciences American University of Sharjah Sharjah26666 United Arab Emirates Center for Advanced Materials Research Research Institute of Science and Engineering University of Sharjah Sharjah27272 United Arab Emirates

The development of third-generation photovoltaic (TGPV) technologies promises to address some of the limitations of conventional silicon-based solar cells. However, the scalability of these technologies is a critical factor in their practical application. TGPV include Perovskite Solar Cells (PSC), Organic Solar Cells (OSC), and Dye-Sensitized Solar Cell (DSSC). This paper reviews and summarizes the recent trends and research on the deposition techniques and modularity of TGPV. Various deposition techniques such as slot-die coating, thermal evaporation, and spray pyrolysis are discussed, along with their advantages and limitations. Modularity, which allows for the integration of TGPV cells into different structures, is also examined as a critical factor in scalability. The paper concludes that the scalability of TGPV technologies depends on the development of efficient and cost-effective deposition techniques and modularity, which will facilitate the integration of the TGPV cells into various structures and enable the widespread use of these promising technologies. © Published under licence by IOP Publishing Ltd.

关键词： Perovskite solar cells

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Prediction of Weather Patterns Using Linear Angstrom Model

Prediction of Weather Patterns Using Linear Angstrom Model

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2022 Advances in science and engineering Technology International Conferences, ASET 2022

作者： Aljaghoub, Haya Alashkar, Adnan Alami, Abdul Hai Tawalbeh, Muhammad University of Sharjah Department of Industrail Engineering and Engineering Management Sharjah United Arab Emirates American University of Sharjah Materials Science and Engineering PhD Program Sharjah United Arab Emirates University of Sharjah Department of Sustainable and Renewable Energy Engineering Sharjah United Arab Emirates

ISBN: (纸本)9781665418010

The paper investigates the correlation between solar irradiance and sunlit hours for the city of Sharjah, United Arab Emirates. This correlation is a strong function of the weather conditions, and is vital for the design and operation of solar energy systems. The Angstrom Model is a straightforward tool that establishes a linear relationship where the model parameters b and a (slope and y-intercept, respectively) are evaluated through plotting of experimental measurements. Wind speed and relative humidity are collected to interpret their effect on the quality of incident solar radiation. The model takes into consideration winter and summer months of the year 2021, hence it provides a complete weather pattern for the year. With continuous data logging, the model will be developed to predict the weather patterns of the city of Sharjah. © 2022 IEEE.

关键词： Solar energy

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Preparation of Graphene Aerogel for Application in Solar Energy Harvesting

Preparation of Graphene Aerogel for Application in Solar Ene...

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2022 Advances in science and engineering Technology International Conferences, ASET 2022

作者： Alhammadi, Alya Alnaqbi, Amna Almarashda, Meera Alasad, Shamma Alashkar, Adnan Inayat, Abrar Abdelkareem, Mohammad Alami, Abdul Hai University of Sharjah Sustainable and Renewable Energy Engineering Department Sharjah United Arab Emirates American University of Sharjah Mechanical Engineering Department Sharjah United Arab Emirates American University of Sharjah Materials Science and Engineering PhD Program Sharjah United Arab Emirates

ISBN: (纸本)9781665418010

In this paper, Graphene Aerogel (GA) is prepared and investigated for its potential employment for solar energy harvesting applications. GA can be applied in solar cells applications as an absorption material and as a catalyst for fuel cells. GA is characterized by its extraordinary electrical conductivity and mechanical strength, in addition to a large surface and a low density. The electrical, mechanical, thermal, and absorption characteristics of GA can be tuned depending on the manufacturing process. Hence, GA is utilized in a multitude of applications such as: supercapacitors, air purification, oil and dye absorption from water, and water waste treatment. GA is also an excellent candidate for superior electrodes. In addition, GA are environmentally friendly materials since they are 100% recyclable and do not produce any ozone-depleting compounds. In this paper, GA is synthesized, characterized, and assessed for solar energy harvesting applications with the aid of absorption and Cyclic voltammetry (CV) tests. Results show that GA has immense potential in solar application due to its low band gap and outstanding optical and electrochemical properties. © 2022 IEEE.

关键词： Cyclic voltammetry

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Biomass-Based Discrete Furan Oligomers as materials for Electrochromic Devices

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ACS Sustainable Chemistry and engineering 2024年第1期12卷 459-469页

作者： Atayde, Eduardo C. Fong, Guan-Lun Yeh, Jyun-Yi Matsagar, Babasaheb M. Wang, Yu-Cheng Chen, De-Chian Peng, Chi-How Li, Yi-Pei Yamauchi, Yusuke Ho, Kuo-Chuan Wu, Kevin C.-W. Molecular Science and Technology Program Taiwan International Graduate Program (TIGP-MST) Academia Sinica No. 128 Sec. 2 Academia Road Taipei 11529 Taiwan Department of Chemistry National Tsing Hua University No. 101 Sec. 2 Kuang-Fu Road Hsinchu 30013 Taiwan Department of Chemical Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan Sustainable Chemical Science and Technology Program Taiwan International Graduate Program (TIGP-SCST) Academia Sinica No. 128 Sec. 2 Academia Road Taipei 11529 Taiwan School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensl Brisbane 4072 QLD Australia Department of Materials Process Engineering Graduate School of Engineering Nagoya University Nagoya 464-8603 Japan Institute of Polymer Science and Engineering National Taiwan University No.1 Sec. 4 Roosevelt Rd. Taipei 10617 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University No. 135 Yuandong Rd. Taoyuan 320 Taiwan

Electrochromic devices (ECDs) are materials that can undergo reversible changes in transmittance when exposed to different applied potentials. While many conjugated heterocyclic oligomers, such as oligothiophenes, have been developed for this purpose, there is no reported study on the use of discrete oligomeric furans as ECD materials. In this work, we introduce a furan trimer that can be utilized as a discrete electrochromic material, which transitions from light yellow to red and has a very high coloration efficiency of 1940 cm²/C at 507 nm. We propose that the reversible π-stack formation of the oligomer radical cations is behind this phenomenon, as evidenced by both experimental and computational results. The derivability of this oligomer from biomass and its facile synthesis make it an interesting alternative for other existing organic electrochromic materials. © 2023 American Chemical Society

关键词： electrochromism furan oligomer hydroxyalkylation−alkylation reaction solvatochromism π-stacks

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An Outlook on the Utilization of Perovskite Films in Photocatalytic and Optoelectronic Devices

An Outlook on the Utilization of Perovskite Films in Photoca...

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Advances in science and engineering Technology International Conferences (ASET)

作者： Adnan Alashkar Mohamad Ali Ayoub Abdul Hai Al-Alami Mohammad Ali Abdelkareem Abdul Ghani Olabi Ayman Mdallal Materials Science and Engineering PhD Program American University of Sharjah Sharjah United Arab Emirate Sustainable and Renewable Energy Engineering University of Sharjah Sharjah United Arab Emirate

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Control of sphalerite-chalcopyrite phase transition in CdSnAs2 for n-type thermoelectrics with high power factor

arXiv

引用

arXiv 2024年

作者： Kishida, Shoki Okamoto, Norihiko L. Katsube, Ryoji Nagaoka, Akira Nose, Yoshitaro Department of Materials Science and Engineering Kyoto University Kyoto606-8501 Japan Institute for Materials Research Tohoku University Sendai980-8577 Japan Department of Materials Process Engineering Nagoya University Nagoya464-8603 Japan Electrical and Electronic Engineering Program University of Miyazaki Miyazaki889-2192 Japan

Practical applications of thermoelectric (TE) materials are constrained by less developments of high-performance n-type materials compared to their p-type counterparts. Chalcopyrite CdSnAs2 is a promising n-type semiconductor for thermoelectrics from its narrow bandgap around 0.2 eV and exceptionally high electron mobility of 103−104 cm2 V−1s−1. In this study, we investigated the crystal growth, microstructure, and thermoelectric properties of CdSnAs2. Contrary to conventional theory of unidirectional melt growth, CdSnAs2 samples at higher cooling rates exhibited better crystallinity, while some cracks were observed in samples cooled more slowly. Thermal analyses clarified that a phase transition from sphalerite to chalcopyrite occurred after solidification in the case of slow cooling, leading to dislocations and cracks due to the lattice mismatch between phases. The analysis at rapid cooling suggested that supercooling lowers the solidification temperature and produces an appropriate microstructure. Consequently, the sample grown at the highest cooling rate (7.6 ∘C min−1) achieved an ultrahigh power factor of 3180 μW m−1K−2 at 600 K and a peak zT of 0.62 at 682 K. In the power factor, CdSnAs2 surpasses conventional binary n-type TE materials such as SnSe and PbTe, proving that CdSnAs2 is a high potential candidate for mid-temperature TE applications. © 2024, CC BY-NC-ND.

关键词： Lattice mismatch

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Photoresponse of Thermally Evaporated Copper Oxide-Based Solar Cells 1

Photoresponse of Thermally Evaporated Copper Oxide-Based Sol...

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1st Middle East and North Africa Solar Conference, MENA-SC 2023

作者： Alami, Abdul Hai Ayoub, Mohamad Alashkar, Adnan Alasad, Shamma Mdallal, Ayman Khuri, Siren Aljaghoub, Haya University of Sharjah Sustainable Energy & Power Systems Research Centre Sustainable and Renewable Energy Engineering Department Sharjah United Arab Emirates American University of Sharjah Materials Science and Engineering PhD Program Sharjah United Arab Emirates American University of Sharjah Mechancial Engineering Department Sharjah United Arab Emirates University of Sharjah Sustainable Energy & Power Systems Research Centre Sharjah United Arab Emirates University of Sharjah Industrial Engineering and Engineering Management Department Sharjah United Arab Emirates

ISBN: (纸本)9781665491464

This study reports on the fabrication and characterization of a copper oxide (CuO)-based photoactive cell. Copper was thermally evaporated onto two substrates and post-treated using chemical and thermal treatments to obtain different semiconducting types of CuO. Absorption measurements were conducted to obtain the bandgaps of CuO, which were found to be 1.51 eV and 1.21 eV, for the chemically and thermally treated CuO, respectively. Finally, a chronoamperometry test was conducted to confirm the photoresponse of the cell, which showed a doubling of output current values under light conditions compared to dark conditions. © 2023 IEEE.

关键词： Copper oxides

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