检索结果-内蒙古大学图书馆

Mechanoluminescent hybrids from a natural resource for energy-related applications

InfoMat 2021年第11期3卷 1272-1284页

作者： Chunfeng Wang Ronghua Ma Dengfeng Peng Xianhu Liu Jing Li Boru Jin Aixian Shan Yu Fu Lin Dong Wenchao Gao Zhong Lin Wang Caofeng Pan Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina Key Laboratory of Materials Processing and Mold(Ministry of Education) Henan Key Laboratory of Diamond Optoelectronic Materials and DevicesKey Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhouChina Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceSchool of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijingChina Department of Civil Engineering Monash UniversityClaytonAustralia

Mechanoluminescent(ML)materials that directly convert mechanical energy into photon emission have emerged as promising candidates for various *** the recent advances in the development of both novel and conventional ML materials,the limited access to ML materials that simultaneously have the attributes of high brightness,low cost,self-recovery,and stability,and the lack of appropriate designs for constructing ML devices represent significant challenges that remain to be addressed to boost the practical application of ML ***,ML hybrids derived from a natural source,waste eggshell,with the aforementioned attributes are *** introduction of the eggshell not only enables the preparation of the hybrid in a simple and cost-effective manner but also contributes to the homochromatism(red,green,or blue emission),high brightness,and robustness of the resultant ML *** significant properties of the ML hybrids,together with the proposed structural design,such as porosity or core–shell structure,could expedite a series of mechanic-optical applications,including the self-luminous shoes for the conversion of human motions into light and light generators that efficiently harvest water wave *** fascinating properties,versatile designs,and the efficient protocol of“turning waste into treasure”of the ML hybrids represent significant advances in ML materials,promising a leap to the practical applications of this flouring material family.

关键词： blue energy harvesting eggshell waste mechanoluminescent hybrids smart sensing

来源：评论

学校读者我要写书评

暂无评论

Case study of LoRaWAN-based smart elements in urban environment

引用

AIP Conference Proceedings 2024年第1期2898卷

作者： Syed Muhammad Mamduh Syed Zakaria Ammar Zakaria Latifah Munirah Kamarudin Retnam Visvanathan Yuzairi Abdul Rahim Noraini Azmi Md Fauzan Elham Faculty of Electronic Engineering Technology Universiti Malaysia Perlis Kampus Pauh Putra Perlis Malaysia Centre of Excellence for Advanced Sensor Technology (CEASTech) Arau Perlis Malaysia Faculty of Electrical Engineering Technology Universiti Malaysia Perlis Kampus Pauh Putra Perlis Malaysia Faculty of Mechanical Engineering Technology Universiti Malaysia Perlis Kampus Pauh Putra Perlis Malaysia Selangor Industrial Corporation Sdn. Bhd. Shah Alam Selangor Malaysia Malaysia

Communication is one of the enablers for smart elements in a smart city. The ability of these smart elements to communicate with each other enables them to react intelligently to dynamically changing conditions. Most communication radios like Zigbee, BLE, and WiFi, among others, are short-ranged and while others such as 3G and 4G LTE, are power-hungry and subscription-based. While these protocols and communication modes work for certain applications, it carries two main limitations; difficulties in deploying IoT solutions in areas without cellular (GPRS, EDGE, 3G, LTE/4G) coverage and reduction in battery life. Thus, the future implementation of IoT and the connection of all kinds of “things” located in all kinds of places, needs a communication medium tailor-made for IoT which is low power, significantly long range, cheap, secure, and easy to deploy. This work presents the results of LoRaWAN coverage tests in Selangor Cyber Valley which is a greenfield development area where smart systems are designed into the blueprint. The data collected are during the early development phase with minimal buildings and foliage. The data demonstrates that the LoRaWAN covers a maximum radius of 2.49 km reliably with less than 10% packet loss. This strongly suggests that LoRaWAN is a reliable connection protocol for outdoor end-devices in urban environments. Future data collection after further developments may demonstrate the impact of buildings and foliage in urban environments on LoRaWAN.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A wearable noncontact free-rotating hybrid nanogenerator for self-powered electronics

引用

InfoMat 2020年第6期2卷 1191-1200页

作者： Dongjie Jiang Han Ouyang Bojing Shi Yang Zou Puchuan Tan Xuecheng Qu Shengyu Chao Yuan Xi Chaochao Zhao Yubo Fan Zhou Li CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina Beijing Advanced Innovation Centre for Biomedical Engineering Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina School of Nanoscience and Technology University of Chinese Academy of SciencesBeijingChina Department of Biomedical Engineering School of Medical EngineeringFoshan UniversityFoshanChina

Self-powerability is a new trend in the development of portable *** biomechanical energy to power personal information electronics is of great *** this work,we report a wearable noncontact freerotating hybrid nanogenerator(WRG),which is constituted by a triboelectric nanogenerator and an electromagnetic generator.A continuous output over 2 seconds can be achieved during one instantaneous incentive by external force,which is improved by two orders of magnitude compared to other wearable nanogenerators due to its unique mechanical energy storage *** WRG can be integrated into shoes to generate an output energy of 14.68 mJ in each stepping,which meets the power requirements of most personal information *** wireless sensor,GPS,and smartphone can be powered by the WRG *** WRG is expected to be applied in self-powered information electronics extensively in the future.

关键词： electromagnetic generator hybrid nanogenerator self-powered electronics triboelectric nanogenerator wearable electronics

来源：评论

学校读者我要写书评

暂无评论

Enhancing the electroactivity of supercapacitors through nitrogen doping on cellulose-derived carbon materials

引用

Chinese Chemical Letters 2025年

作者： Siling Chen Yang Hu Sijia Zhang Xuesong Liu Zhuqun Shi Chuanxi Xiong Weiwei Wu Ruizhi Ning Quanling Yang Engineering Research Center of Molecular & Neuroimaging Ministry of Education School of Life Science and Technology Xidian University Xi'an 710126 China Interdisciplinary Research Center of Smart Sensor Academy of Advanced Interdisciplinary Research Xidian University Xi’an 710126 China School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Wuhan 430070 China Shenzhen Institute Wuhan University of Technology Shenzhen 518000 China

Nowadays, higher requirements are put forward to the storage and utilization of energy, and supercapacitor is a kind of energy storage electronic devices. The resulting CA-N, with a specific surface area of 320.6 m²/g and a pore volume of 0.28 cm³/g, demonstrated a remarkable supercapacitance of 283.3 F/g. As a mesoporous material, CA-N offers numerous channels for the diffusion and absorption of electrolyte ions. Furthermore, it exhibited an impressive capacity retention rate of 98.48% after 5,000 charge-discharge cycles. These outstanding electrochemical properties highlight the potential of CA-N for applications in energy storage.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Exploring the impressive nonlinear optical and dielectric properties of cadmium thiourea acetate crystal doped with oxalic acid

引用

Materials Today: Proceedings 2020年 23卷 423-429页

作者： Rupali B. Kulkarni S.S. Hussaini Mahendra D. Shirsat RUSA Centre for Advanced Sensor Technology Dr. Babasaheb Ambedkar Marathwada University Aurangabad 431004 MS India Crystal Growth Laboratory Department of Physics Milliya Arts Science & Management Science College Beed 431122 Maharashtra India

The present communication is aimed to investigate the remarkably improved properties of oxalic acid (OA) doped bis cadmium thiourea acetate (CTA) crystal. The commercial slow solvent evaporation method has been employed to grow the pure and OA doped CTA crystal. The structure and unit cell parameters of grown crystal were determined by means of powder X-ray diffraction technique, which confirmed orthorhombic crystal structure. The optical transparency of OA doped CTA crystal (78%) has been ascertained in the visible region (200-900 nm) using the UV-visible spectral analysis. The assertive influence of OA on the dielectric behavior of host CTA crystal was investigated in the temperature range 35-120 o C by means of dielectric studies. Doped crystal showed lower dielectric nature than parent. The nonlinear response of OA-CTA crystal was confirmed by Kurtz-Perry test.. The SHG efficiency of OA-CTA crystal is found to be higher than potassium dihydrogen phosphate (KDP) crystal. Obtained results confirmed suitability of OA doped CTA crystal for photonic device applications.

关键词： Crystal growth Optical studies Dielectric studies Nonlinear optical materials

来源：评论

学校读者我要写书评

暂无评论

Review of analysis of EEG signals for stress detection

引用

AIP Conference Proceedings 2024年第1期2934卷

作者： Muhammad Rasydan Mazlan Abdul Syafiq Abdull Sukor Abdul Hamid Adom Ruzita Jamaluddin Faculty of Electrical Engineering Technology Universiti Malaysia Perlis (UniMAP) Pauh Putra Campus 02600 Arau Perlis Malaysia Faculty of Mechanical Engineering Technology Universiti Malaysia Perlis (UniMAP) Pauh Putra Campus 02600 Arau Perlis Malaysia Centre of Excellence for Advanced Sensor Technology (CEASTech) Universiti Malaysia Perlis (UniMAP) 02600 Arau Perlis Malaysia Department of Psychiatry and Mental Health Hospital Tuanku Fauziah 01000 Kangar Perlis Malaysia

Mental stress is one of the major contributors to a variety of health issues. Various measures and diagnoses have been created by neurologists and psychiatrists to determine the intensity of mental stress in its early phases. In the literature, several neuroimaging devices and methods for assessing mental stress have been presented. The key candidate chosen is the electroencephalogram (EEG) signal which contains valuable information regarding mental states and conditions. This paper presents reviews of current works on EEG signal analysis for assessing mental stress. The reviews emphasize the significant disparities in the research outcomes and claims of different results from various data analysis methodologies. Accordingly, methods of EEG signals analysis will be used to study the effect of various extracted features and classification methods that associate with mental stress. Apart from that, the utilization of Artificial Intelligence (AI) approach is also investigated to study its significance towards stress detection.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Electrolyte design for lithium-sulfur batteries: Progress and challenges

引用

Renewable and Sustainable Energy Reviews 2025年 221卷

作者： W. Jan A.D. Khan F.J. Iftikhar M.Z. Abbasi G. Ali E. Iwuoha S. Shahzad F. Ahmad N. Ahmad U.S-Pakistan Center for Advanced Studies in Energy (USPCAS-E) University of Engineering & Technology Peshawar 25000 Pakistan NUTECH School of Applied Sciences and Humanities National University of Technology (NUTECH) Islamabad 44000 Pakistan Sarhad University of Information Technology Peshawar 25000 Pakistan U.S.-Pakistan Center for Advanced Studies in Energy (USPCAS-E) National University of Sciences and Technology (NUST) H-12 Islamabad 44000 Pakistan UWC Sensor Laboratories (SensorLab) Department of Chemistry University of the Western Cape Bellville 7535 Cape Town South Africa Department of Chemical and Materials Engineering College of Engineering Northern Border University Arar Saudi Arabia

Lithium-sulfur batteries (LiSBs) have gained popularity in recent years because of their high specific capacity (1675 mAh/g), high energy density (2600 Wh/kg) and abundance of sulfur in nature. Yet, unlike Lithium-ion batteries, their commercialization has been challenging. In spite of significant studies on cathodes made of sulfur, lithium metal anodes, changes in separator topologies, embedded layers in cell topologies, and electrolyte architecture, it is still difficult to explain the polysulfide shuttling effect in electrolytes used in LiSBs. This review provides a comprehensive perspective on electrolyte design and critically examines recent research on electrolytes in LiSBs. It additionally provides distinctive techniques for improving the performance and lifespan of these batteries. In short, this review provides a clear and insightful evaluation of the development, prospects, and challenges related to LiSB electrolytes. The advancement of LiSBs holds immense potential to significantly enhance the sustainability and efficiency of our energy landscape. Hence, this field presents an impactful opportunity for researchers and investors to contribute to a more sustainable future.

关键词： Ceramic-based electrolytes Gel polymer-based electrolytes Ionic liquid based electrolytes Lithium sulfur batteries Solid-state polymer electrolyte

来源：评论

学校读者我要写书评

暂无评论

A Hybrid Biofuel and Triboelectric Nanogenerator for Bioenergy Harvesting

引用

Nano-Micro Letters 2020年第4期12卷 53-64页

作者： Hu Li Xiao Zhang Luming Zhao Dongjie Jiang Lingling Xu Zhuo Liu Yuxiang Wu Kuan Hu Ming‑Rong Zhang Jiangxue Wang Yubo Fan Zhou Li Beijing Advanced Innovation Centre for Biomedical Engineering Key Laboratory for Biomechanics and Mechanobiology of Chinese Education MinistrySchool of Biological Science and Medical EngineeringBeihang UniversityBeijing 100083People’s Republic of China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro‑Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Physical Education Jianghan UniversityWuhan 430056People’s Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China Department of Radiopharmaceuticals Development National Institute of Radiological SciencesNational Institutes for Quantum and Radiological Science and TechnologyChiba 263‑8555Japan

Various types of energy exist everywhere around us,and these energies can be harvested from multiple sources to power micro-/nanoelectronic system and even personal electronic *** this work,we proposed a hybrid energy-harvesting system(HEHS)for potential in vivo *** HEHS consisted of a triboelectric nanogenerator and a glucose fuel cell for simultaneously harvesting biomechanical energy and biochemical energy in simulated body *** two energy-harvesting units can work individually as a single power source or work simultaneously as an integrated *** design strengthened the flexibility of harvesting multiple energies and enhanced corresponding electric *** with any individual device,the integrated HEHS outputs a superimposed current and has a faster charging *** the harvested energy,HEHS can power a calculator or a green light-emitting diode *** the widely existed biomechanical energy and glucose molecules in the body,the developed HEHS can be a promising candidate for building in vivo self-powered healthcare monitoring system.

关键词： Self-powered Triboelectric nanogenerator Glucose fuel cell Hybrid energy harvester Bioenergy

来源：评论

学校读者我要写书评

暂无评论

Ultrafast demagnetization in ferromagnetic materials: origins and progress

arXiv

引用

arXiv 2024年

作者： Chen, Xiaowen Adam, Roman Bürgler, Daniel E. Wang, Fangzhou Lu, Zhenyan Pan, Lining Heidtfeld, Sarah Greb, Christian Liu, Meihong Liu, Qingfang Wang, Jianbo Schneider, Claus M. Cao, Derang College of Physics Qingdao University Qingdao266071 China National Demonstration Center for Experimental Applied Physics Education Qingdao University Qingdao266071 China Spin-X Institute South China University of Technology Guangzhou511442 China Peter Grünberg Institute Forschungszentrum Jülich Jülich52425 Germany Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and Electronics Hunan University of Science and Technology Xiangtan411201 China CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education Lanzhou University Lanzhou730000 China Key Laboratory of Special Functional Materials and Structural Design Ministry of Education Lanzhou University Lanzhou730000 China Faculty of Physics University of Duisburg-Essen Duisburg47057 Germany Department of Physics University of California Davis DavisCA95616-5270 United States

Since the discovery of ultrafast demagnetization in Ni thin films in 1996, laser-induced ultrafast spin dynamics have become a prominent research topic in the field of magnetism and spintronics. This development offers new possibilities for the advancement of spintronics and magnetic storage technology. The subject has drawn a substantial number of researchers, leading to a series of research endeavors. Various models have been proposed to elucidate the physical processes underlying laser-induced ultrafast spin dynamics in ferromagnetic materials. However, the potential origins of these processes across different material systems and the true contributions of these different origins remain challenging in the realm of ultrafast spin dynamics. This predicament also hinders the development of spintronic terahertz emitters. In this review, we initially introduce the different experimental methods used in laser-induced ultrafast spin dynamics. We then systematically explore the magnetization precession process and present seven models of ultrafast demagnetization in ferromagnetic materials. Subsequently, we discuss the physical processes and research status of four ultrafast demagnetization origins (including spin-flipping, spin transport, non-thermal electronic distribution, and laser-induced lattice strain). Since attosecond laser technique and antiferromagnetic materials exhibit promising applications in ultrahigh-frequency spintronics, we acknowledge the emerging studies used by attosecond pules and studies on ultrafast spin dynamics in antiferromagnets, noting the significant challenges that need to be addressed in these burgeoning field. © 2024, CC BY.

关键词： Spin dynamics

来源：评论

学校读者我要写书评

暂无评论

Ultrafast polarization modulation with high-purity chiral quasi-BIC metasurfaces

引用

Chinese Optics Letters 2025年第5期23卷 053605-053605页

作者： Fangxing Lai Yubin Fan Xinbo Sha Huachun Deng Xiong Jiang Shumin Xiao Can Huang Qinghai Song Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China Department of Electrical Engineering City University of Hong Kong Hong Kong 999077 China Heilongjiang Provincial Key Laboratory of Advanced Quantum Functional Materials and Sensor Devices Harbin 150001 China

Precise control of the polarization state of light on ultrafast time scales plays a key role in revealing the inherent chiral or anisotropic optical responses in various material systems, and it is crucial for applications that require complex polarization encoding. Here, we explore ultrafast polarization control enabled by silicon-based chiral bound state in the continuum (BIC) metasurfaces. By utilizing the intrinsic chiral mode, we achieve high-purity chiral reflection light (S 3 ∼ −0.92) and rapid modulation (∼0.4 ps) of polarization states through all-optical methods. Unlike traditional polarization modulation techniques, our approach leverages the unique advantages of slanted etching dielectric chiral BIC metasurfaces, which facilitate high- Q resonance and exhibit narrow linewidths. These advantages allow swift alterations in polarization states with minimal modulation energy consumption, which should help for greater control of light in integrated photonic applications.

关键词： Light matter interactions Modulation techniques Polarization control Q factor Refractive index Scanning electron microscopy

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：