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The physical attributes of rubidium-based Rb2TlRhF6 double perovskite halide: A first-principles investigation

Physica B: Condensed Matter 2024年 685卷

作者： Qaid, Saif M.H. Murtaza, Hudabia Ain, Quratul Din, Moeen Ud Ghaithan, Hamid M. Ali Ahmed, Abdullah Ahmed Munir, Junaid Department of Physics & Astronomy College of Sciences King Saud University P.O. Box 2455 Riyadh11451 Saudi Arabia Department of Physics Riphah International University Lahore Pakistan Department of Physics University of Management and Technology Lahore Pakistan Department of Physics National Taiwan University Taipei10617 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei11529 Taiwan Physics Division National Center for Theoretical Sciences Taipei1061 Taiwan and Fachbereich Physik Universität Hamburg Hamburg20146 Germany

Rubidium cations (Rb+) significantly improve the overall performance of organic-inorganic hybrid perovskite based devices and have gained exceptional attention due to their good thermal and structural stability. In this paper, we have evaluated the physical attributes of rubidium based Rb2TlRhF6 via DFT code using TB-mBJ potential. Structural stability has been confirmed through negative formation energy and calculated tolerance factor. Band structure and TDOS profile confirm semiconductor nature with 3.2 eV direct bandgap at (L-L) symmetry points. A ductile nature with metallic bonding is observed through the investigation of elastic attributes. Optical analysis of Rb2TlRhF6 indicates great absorption in the UV region. Low thermal conductivity and electrical resistivity, along with a high value for power factor, resulted in high ZT value of 0.8 and 800 K. The combined qualities provide a stunning and exciting picture of this compound for use in thermoelectric advanced technologies. © 2024 Elsevier B.V.

关键词： Density functional theory

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力致发光驱动的咬合控制人机交互界面

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science Bulletin 2023年第6期68卷 559-561,M0003页

作者：王春枫胡鸿杰朱德亮潘曹峰 College of Materials Science and Engineering Guangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen UniversityShenzhen 518060China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China Materials Science and Engineering Program University of California San DiegoLa Jolla CA 92093USA School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Human–machine interfaces (HMIs) enable the intuitive cognition and interaction between users and devices [1–3]. The conventional HMIs such as mouse, keyboard and touchscreen have significantly simplified the manipulations of computers and associated devices, while they suffer from bulk, big footprint and mechanical noncompliance for applications in virtual/augmented reality and Internet of Things, and more importantly, difficulties in operation for people with disabilities such as dexterity impairments or neurological conditions [4,5].

关键词：人机交互界面力致发光 enable

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Enhancing the Absorption Figure of Merit on Solution-Based Cuo Thin Films by Ni Doping

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SSRN 2023年

作者： Nguyen Quoc Trinh, Bui Loi, Nguyen Van Mai, La Thi Ngoc Luong, Nguyen Hoang Faculty of Physics University of Science Vietnam National University 334 Nguyen Trai Thanh Xuan Hanoi Viet Nam Nanotechnology Program Faculty of Advanced Technology and Engineering Vietnam Japan University Vietnam National University Luu Huu Phuoc Nam Tu Liem Hanoi Viet Nam Nano and Energy Center University of Science Vietnam National University 334 Nguyen Trai Thanh Xuan Hanoi Viet Nam Key Laboratory for Micro-Nano Technology University of Engineering and Technology Vietnam National University 144 Xuan Thuy Cau Giay Hanoi Viet Nam

We evaluated an absorbance effectiveness on the solar spectrum using an absorption figure of merit (a-FOM) for the conducting thin films. In particular, Ni-doped and un-doped CuO thin films were deposited by a facile and sustainable solution-processed synthesis, whose Ni doping concentration was varied to be 0.2, 0.6, 1, 2, 3, 4 wt.%. We observed a change of smooth surface to an appearance of nanoparticles by Ni doping, which supported to form of a plasmonic mechanism for improving the light capture and retention. The absorption of long wavelengths was improved and extended to the near-infrared range. That is, the bandgap energy decreased from 2.10 to 1.88 eV with Ni doping. Also, we found that the absorption length decreased from 99.93 nm to 63.80 nm as the Ni doping increased. In addition, the CuO-based film with 4 wt.% Ni doping showed a maximal value of a-FOM as high as 30.88 Ω-1cm-1, corresponding to a resistance of 2.07 MΩ/sq and an absorption length of 63.80 nm. Our finding suggested that Ni-doped CuO thin films can be considered as an excellent selection of absorbent conductive oxide layers for application in optoelectronic devices and solar cell systems. © 2023, The Authors. All rights reserved.

关键词： Copper oxides

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The Effect of Avian Eggshell Membrane Structure on Microbial Penetration: A Simulation Study

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SSRN 2024年

作者： Sim, Seungwoo Park, Cheol-Min Lee, Sang-Hee Cho, Haeun Ji, Youngheum Noh, Heeso Lee, Sang-Im Ecological Technology Research Team National Institute of Ecology Chungnam Seocheon Korea Republic of Division of Industrial Mathematics National Institute for Mathematical Sciences Daejeon Korea Republic of Laboratory of Behaviour and Ecology Interdisciplinary Program of EcoCreative Ewha Womans University Seoul Korea Republic of School of Undergraduate Studies Daegu Gyeongbuk Institute of Science and Technology Daegu Korea Republic of Department of Nano and Electronic Physics Kookmin University Seoul Korea Republic of Department of New Biology Daegu Gyeongbuk Institute of Science and Technology Daegu Korea Republic of

Avian eggshells exhibit excellent antimicrobial properties. In this study, we conducted simulation experiments to explore the defense mechanisms of eggshell membranes with regards to their physical features. We developed a mathematical model for the movement of microorganisms and estimated their penetration ratio into eggshell membranes based on several factors, including membrane thickness, microbial size, directional drift, and attachment probability to membrane fibers. These results not only suggest that an eggshell membrane with multiple layers and low porosity indicates high antimicrobial performance, but also imply that the fibrous network structure of the membrane might contribute to effective defense. Our simulation results aligned with experimental findings, specifically in measuring the penetration time of Escherichia coli through the eggshell membrane. We briefly discuss the significance and limitations of this pilot study, as well as the potential for these results, to serve as a foundation for the development of antimicrobial materials. © 2024, The Authors. All rights reserved.

关键词： Escherichia coli

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Chiral metal-organic framework based spin-polarized flexible photodetector with ultrahigh sensitivity

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Materials Today nano 2023年 21卷

作者： Mustaqeem, M. Kamal, S. Ahmad, N. Chou, P.-T. Lin, K.-H. Huang, Y.-C. Guo, G.-Y. Paul Inbaraj, C.R. Li, W.-K. Yao, H.-C. Lu, K.-L. Chen, Y.-F. Department of Chemistry National Taiwan University No. 1 Section 4 Roosevelt Rd Taipei10617 Department of Physics National Taiwan University No. 1 Section 4 Roosevelt Rd Taipei10617 Nano-Science and Technology Program Taiwan International Graduate Program Institute of Physics Academia Sinica Taipei106 Taiwan Institute of Chemistry Academia Sinica Taipei115 Taiwan Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Institute of Physics Academia Sinica Taipei11529 Taiwan Department of Materials Engineering Ming Chi University of Technology

Spin-optoelectronics plays a key role in developing next-generation technologies with potential applications covering from pharmaceutical synthesis and quantum computing to optical communication. One of the most feasible ways to achieve high-performance spin optoelectronic devices is based on chiral materials. Chiral metal-organic frameworks (CMOFs), an emerging class of chiral hybrid materials, have sparked interest due to their structural variety and flexibility, order nanopores, cost-effectiveness, and unique chirality features. Herein, we have developed CMOF [Sr (9,10-adc) (DMAc)2]n based on achiral building blocks [(9,10-adc)] to detect circularly polarized light (CPL) with ultrahigh sensitivity. Their application in spin-polarized flexible detectors gives a detectivity (D∗) as high as 1.83 × 1012 jones, superior to all reported heterochiral MOF-based detectors. Meanwhile, the anisotropy factor (gIph) is up to 0.38 for CPL detection. The maximum photoresponsivity (Rph) and photogain (η) values of CMOFs reach up to 6.0 × 105 (A/W) and 1.8 × 106, respectively, which are also the record values among reported chiral MOFs. Additionally, the photodetector is mechanically flexible and durable, manifesting an important feature for wearable devices. Therefore, our study shown here is significant and timely to open a route for advancing spin-optoelectronics based on CMOF. © 2023 Elsevier Ltd

关键词： Photodetectors

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Study of Cell Encapsulation System in Using Thai Silk Fibroin-Based Hydrogel

Study of Cell Encapsulation System in Using Thai Silk Fibroi...

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Biomedical Engineering International Conference (BMEiCON)

作者： Nitchaya Suksomthong Sasitorn Aueviriyavit Juthamas Ratanavaraporn Interdisciplinary Program of Biomedical Engineering Faculty of Engineering Chulalongkorn University Bangkok Thailand Nano Safety and Bioactivity Research Team National Nanotechnology Center National Science and Technology Development Agency (NSTDA) Pathum Thani Thailand Biomedical Engineering Program Biomedical Engineering Research Center Biomaterial Engineering for Medical and Health Research Unit Faculty of Engineering Chulalongkorn University Bangkok Thailand

Designing biomimetic tissue models and developing scaffolds under cell-compatible protocols are a challenge in the field of tissue engineering. Cell encapsulation technique was selected with hydrogel fabrication due to its similarity to the condition within the human body. This study proposed SF-based hydrogels with the aim of application as cell encapsulation matrix. The vital properties, including gelation, diffusion, and cell viability were evaluated. SF/DMPG hydrogels exhibited rapid gelation and sufficient diffusion. L929 cells encapsulated in SF/DMPG survived after the fabrication process, with proliferation occurred at day 1 of culture which was done in static condition. The developed hydrogels showed potential application as a cell encapsulation matrix using tissue engineering, especially bioink.

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Role of topological surface states and mirror symmetry in topological crystalline insulator SnTe as an efficient electrocatalyst

arXiv

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arXiv 2021年

作者： Qu, Qing Liu, Bin Liu, Hongtao Liang, Jing Wang, Jiannong Pan, Ding Sou, Iam Keong Nano Science and Technology Program The Hong Kong University of Science and Technology Hong Kong Hong Kong Department of Physics The Hong Kong University of Science and Technology Clear Water Bay Hong Kong Hong Kong William Mong Institute of Nano Science and Technology The Hong Kong University of Science and Technology Hong Kong Hong Kong Department of Chemistry The Hong Kong University of Science and Technology Hong Kong Hong Kong

The surface orientation dependence on the hydrogen evolution reaction (HER) performance of topological crystalline insulator (TCI) SnTe thin films is studied. Their intrinsic activities are determined by linear sweep voltammetry and cyclic voltammetry measurements. It is found that SnTe (001) and (111) surfaces exhibit intrinsic activities significantly larger than the (211) surface. Density functional theory calculations reveal that pure (001) and (111) surfaces are not good electrocatalysts, while those with Sn vacancies or partially oxidized surfaces, with the latter as evidenced by X-ray photoelectron spectroscopy, have high activity. The calculated overall performance of the (001) and (111) surfaces with robust topological surface states (TSSs) is better than that of the lowly symmetric (211) surface with fragile or without TSSs, which is further supported by their measured weak antilocalization strength. The high HER activity of SnTe (001) and (111) is attributed to the enhanced charge transfer between H atoms and TSSs. We also address the effect of possible surface facets and the contrast of the HER activity of the available active sites among the three samples. Our study demonstrates that the TSSs and mirror symmetry of TCIs expedite their HER activity. Copyright © 2021, The Authors. All rights reserved.

关键词： IV-VI semiconductors

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Nonsaturated large magnetoresistance and transport dynamics in a n-doped cryogenic WSe2 field-effect device

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Physical Review B 2025年第12期111卷 125307-125307页

作者： Wei-Chen Lin Ching-Chen Yeh Jia-Zhu Zou Nhat Anh Nguyen Phan Inayat Uddin Hai Yen Le Thi Kenji Watanabe Takashi Taniguchi Gil-Ho Kim Department of Engineering and System Science National Tsing Hua University Hsinchu 300 Taiwan Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Department of Physics National Taiwan University Taipei 106 Taiwan Department of Electrical and Computer Engineering Sungkyunkwan University (SKKU) Suwon 164 Republic of Korea Sungkyunkwan Advanced Institute of Nano Technology (SAINT) Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Research Center for Electronic and Optical Materials National Institute for Materials Science 1-1 Namiki Tsukuba 305-0044 Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science 1-1 Namiki Tsukuba 305-0044 Japan

Interest in the two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDs) continues to intensify, driven by their suitable band gaps to supplant silicon as next-generation semiconductor materials. Among various TMDs, tungsten diselenide (WSe2) is renowned for its superior electrical properties in carrier density and mobility under ambient conditions. Despite its notable attributes, the behavior of monolayer WSe2 in the electron-doped regime under cryogenic conditions remains largely uncharted, particularly concerning its magnetotransport properties. In this study, we reveal the transport mechanisms of monolayer WSe2 from high temperatures down to the cryogenic regime. As evident by Efros–Shklovskii variable-range hopping (E-S VRH) in the cryogenic regime, strong Coulomb interactions arise between electrons. Above 8 K, an uncommon nonsaturated quadratic large magnetoresistance (MR) can be explained by the wave-function shrinkage model, which is consistent with the E-S VRH transport mechanism. Notably, the nonsaturated quadratic large MR shows a magnitude up to 1740% at 13 T. These findings underscore the potential applications for monolayer WSe2 in cryogenic field-effect devices, magnetic sensors, and memory devices and mark a significant advance in magnetotransport research.

关键词： Monolayers

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Facile Manufacturing of Foldable Micro-Supercapacitors Utilizing Pneumatic Printing in Conjunction with Intense Pulsed White Light

SSRN

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SSRN 2024年

作者： Song, Chiho Hwang, Jeonguk Park, Changyoung Lee, Sujin Hwang, Yeon-Taek Kim, Hak-Sung Bansal, Neetu Salunkhe, Rahul R. Ahn, Heejoon Human-Tech Convergence Program Department of Organic and Nano Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Organic and Nano Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Mechanical Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Physics Indian Institute of Technology Jammu Jammu and Kashmir181221 India Department of Battery Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Institute of Nano Science and Technology Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of

The rapid development of foldable and rollable displays and electronic devices has aggravated the need for flexible and miniaturized energy-storage devices, such as micro-supercapacitors (MSCs). Existing devices have several shortcomings, such as high cost of materials, high energy consumption, and complicated fabrication methods. This study introduces a straightforward method for fabricating flexible MSCs based on reduced graphene oxide (rGO) and manganese oxide utilizing a printing technique and intense pulsed white light (IPWL) technology. Using this method, asymmetric microelectrodes can be easily printed on a flexible polymeric substrate, and rGO and manganese oxide can be quickly synthesized under atmospheric pressure at room temperature via irradiation with IPWL. An asymmetric hybrid-type structure composed of rGO-based carbon materials and synthesized manganese mono-oxide exhibits an areal capacitance of 5.1 mF cm-2 and an energy density of 3 μWh cm-2 at a power density of 0.1 mW cm-2. The developed flexible MSCs worked well at various radii of curvature, even under the extreme bending condition of 1 mm radius of curvature, demonstrating excellent areal capacitance retention of up to 99.4% even after 10,000 repetitive bending cycles. © 2024, The Authors. All rights reserved.

关键词： Supercapacitor

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Direct Visualization of a Disorder Driven Electronic Smectic Phase in Dirac Nodal Line Semimetal GdSbTe

arXiv

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arXiv 2024年

作者： Venkatesan, Balaji Guan, Syu-You Chang, Jen-Te Chiu, Shiang-Bin Yang, Po-Yuan Su, Chih-Chuan Chang, Tay-Rong Raju, Kalaivanan Sankar, Raman Fongchaiya, Somboon Chu, Ming-Wen Chang, Chia-Seng Chang, Guoqing Lin, Hsin Del Maestro, Adrian Kao, Ying-Jer Chuang, Tien-Ming Department of Physics National Taiwan University Taipei10617 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica National Taiwan University Taipei11529 Taiwan Institute of Physics Academia Sinica Taipei11529 Taiwan Department of Physics National Cheng-Kung University Tainan701 Taiwan Center for Condensed Matter Sciences National Taiwan University Taipei10617 Taiwan Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei11529 Taiwan Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore Department of Physics and Astronomy University of Tennessee KnoxvilleTN37996 United States Institute for Advanced Materials & Manufacturing University of Tennessee KnoxvilleTN37996 United States Min H. Kao Department of Electrical Engineering and Computer Science University of Tennessee KnoxvilleTN37996 United States Center for Quantum Science and Technology National Taiwan University Taipei10607 Taiwan

Electronic liquid crystal (ELC) phases are spontaneous symmetry breaking states believed to arise from strong electron correlation in quantum materials such as cuprates and iron pnictides. Here, we report a direct observation of a smectic phase in a weakly correlated Dirac nodal line (DNL) semimetal GdSbxTe2-x. Incommensurate smectic charge modulation and intense local unidirectional nanostructure are visualized by using spectroscopic imaging - scanning tunneling microscopy. As topological materials with symmetry protected Dirac or Weyl fermions are mostly weakly correlated, the discovery of such an ELC phase are anomalous and raise questions on the origin of their emergence. Specifically, we demonstrate how chemical substitution generates these symmetry breaking phases before the system undergoes a charge density wave (CDW) - orthorhombic structural transition. Our results highlight the importance of impurities in realizing ELC phases and present a new material platform for exploring the interplay among quenched disorder, topology and electron correlation. Copyright © 2024, The Authors. All rights reserved.

关键词： Charge density waves

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