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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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Rational Design of Ultrastable Conjugated Microporous Polymers Based on Pyrene and Perylene Units as High-Performance Organic Electrode materials for Supercapacitor Applications

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ACS Applied Energy materials 2023年第15期6卷 8277-8287页

作者： Singh, Poonam Nagendra Mohamed, Mohamed Gamal Chaganti, Swetha V. Sharma, Santosh U. Ejaz, Moshin Lee, Jyh-Tsung Kuo, Shiao-Wei Department of Materials and Optoelectronic Science Center for Functional Polymers and Supramolecular Materials National Sun Yat-Sen University Kaohsiung804 Taiwan Department of Chemistry Faculty of Science Assiut University Assiut71515 Egypt Department of Chemistry National Sun Yat-Sen University Kaohsiung80424 Taiwan International PhD Program for Science National Sun Yat-Sen University Kaohsiung80424 Taiwan Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung807 Taiwan

We successfully synthesized three perylene dianhydride (PDI)-based conjugated microporous polymers (CMPs), namely, Py-Ph-Pery, TPE-Ph-Pery, and TPA-Ph-Pery CMPs, through a Suzuki-Miyaura coupling reaction. The precursors used in the reaction contained brominated compounds of pyrene (Py), tetraphenylethylene (TPE), triphenylamine (TPA), and 1,4-benzeneboronic acid, which were coupled with redox-active PDI unit. To evaluate the thermal stability, molecular structure, and porosity properties of the synthesized CMPs, we conducted an examination of their Brunauer-Emmett-Teller isotherm, along with spectroscopic and microscopic analyses. These CMPs demonstrated moderate thermal stability based on thermogravimetric analysis. In terms of electrochemical performance, the Py-Ph-Pery CMP exhibited a high capacitance of 300 F g-1 (measured at 0.5 A g-1), indicating its excellent capacitive properties. Furthermore, the Py-Ph-Pery CMP displayed exceptional cycle stability at 10 A g-1, retaining more than 93% of its capacity over 5000 cycles. The findings illustrate the potential of these CMPs for reliable and durable energy storage applications. Additionally, we utilized synthesized CMPs to assess the electrochemical characteristics of a symmetric coin supercapacitor. The results further validate the suitability of these CMPs for practical electrical energy storage applications, highlighting their significant promise. © 2023 American Chemical Society.

关键词： Supercapacitor

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Eclipse timing variations in the WD + dM eclipsing binary RR Cae

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Monthly Notices of the Royal Astronomical Society 2023年第4期523卷 5086-5108页

作者： Rattanamala, R. Awiphan, S. Komonjinda, S. Phriksee, A. Sappankum, P. A-Thano, N. Chitchak, S. Rittipruk, P. Sawangwit, U. Poshyachinda, S. Reichart, D.E. Haislip, J.B. PhD Program in Astronomy Department of Physics and Materials Science Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Physics and General Science Program Faculty of Science and Technology Nakhon Ratchasima Rajabhat University Nakhon Ratchasima30000 Thailand 260 Moo 4 Donkaew Mae Rim Chiang Mai50180 Thailand Department of Physics and Materials Science Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Institute of Astronomy National Tsing Hua University Hsinchu30013 Taiwan Department of Physics Faculty of Science Udon Thani Rajabhat University Udon Thani41000 Thailand Department of Physics and Astronomy University of North Carolina at Chapel Hill Chapel HillNC27599 United States

We present the binary model and the eclipse timing variations of the eclipsing binary RR Cae, which consists of a white dwarf eclipsed by an M-type dwarf companion. The multiwavelength optical photometry from the Transiting Exoplanet Survey Satellite (TESS), the 0.6-m PROMPT-8 telescope, and the 0.7-m Thai Robotic Telescope at Spring Brook Observatory, combined with archive H α radial velocities from the Very Large Telescope (VLT) are analysed. From the data, the physical parameters of the system are obtained along with 430 new times of minima. The TESS light curves in 2018 and 2020 show out-of-eclipse variations, which might be caused by a large spot on the secondary component. The light travel time effect models due to the gravitational interaction of one or two circumbinary objects are adopted to fit the cyclic variations in the RR Cae’s O-C curve. The fitting solution of the O-C curve with one circumbinary object model shows a periodic variation with a period of 16.6 ± 0.2 yr and an amplitude of 14 ± 1 s, which can be caused by a planet with a minimum mass of 3.4 ± 0.2 MJup. When we consider the model with two circumbinary objects, the O-C curve shows cyclic variations with periods of 15.0 ± 0.5 yr and 39 ± 5 yr and amplitudes of 12 ± 1 s and 20 ± 5 s, respectively, corresponding to minimum masses of 3.0 ± 0.3 MJup and 2.7 ± 0.7 MJup © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.

关键词： Travel time

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Period variation of an eclipsing binary system BQ Ari 17

Period variation of an eclipsing binary system BQ Ari

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17th Siam Physics Congress: Carbon Neutrality, SPC 2022

作者： Rattanamala, R. Komonjinda, S. Awiphan, S. Wutsang, S. Sappankum, P. Deesuan, L. Department of Physics and General Science Faculty of Science and Technology Nakhon Ratchasima Rajabhat University Nakhon Ratchasima30000 Thailand PhD Program in Astronomy Department of Physics and Materials Science Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Department of Physics and Materials Science Faculty of Science Chiang Mai University Chiang Mai50200 Thailand 260 Moo 4 Donkaew Mae Rim Chiang Mai50180 Thailand

This study was aimed to study the period variation of the eclipsing binary BQ Ari. The system was observed from Thai Robotic Telescope at Spring Brook Observatory (TRT-SBO) between 2019 and 2020, Regional Observatory for Public, Chachoengsao (ROP-CCO) in 2021, and Transiting Exoplanet Survey Satellite (TESS) in Sector 42 and 43. The data obtained were used to create the light curves in each wavelength and compute the times of minima. As the result, we receive 311 time of minima. We combined the time of minima from the previously published with our values to calculate the O - C diagram. The O - C diagram shown the period variation with a period about 6-8 years and amplitude about 0.0020 days. The possibility of the period variation of BQ Ari may be due to the third body component with the mass of 0.0948 M o (M dwarf) and the orbital separation (a 3sini) around 3.96 AU. © Published under licence by IOP Publishing Ltd.

关键词： Observatories

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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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Novel (Ce,Mo) Co-Doped Bivo4 with Enhanced Photocatalytic Activity for the Degradation of Methyl Orange

SSRN

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SSRN 2023年

作者： Sriwichai, Surassa Sakulsermsuk, Sumet Wetchakun, Khatcharin Wetchakun, Natda PhD’s Degree Program in Materials Science Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Department of Physics and Materials Science Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Faculty of Science Ubon Ratchathani Rajabhat University Ubon Ratchathani34000 Thailand

Novel (Ce,Mo) co-doped BiVO4 is synthesized via the hydrothermal method. The effect of Ce and Mo ions co-doping on the physicochemical and photocatalytic characteristics of BiVO4 is investigated. The presence of Ce and Mo in BiVO4 induces a tetragonal zircon phase, rod-like morphology, and wide band gap. The synergistic effect of optimal Ce and Mo allows (0.0312Ce, 0.0312Mo) co-doped BiVO4 to show a ~15-fold increase in the methyl orange (MO) degradation. The enhanced photocatalytic performance of (Ce,Mo) co-doped BiVO4 is attributed to the increased surface adsorption ability, increased band gap, and improved effective separation of the photogenerated electron and hole pairs. Furthermore, active species trapping experiments reveal that h+ is the dominant radical in the photodegradation process. © 2023, The Authors. All rights reserved.

关键词： Morphology

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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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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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