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PbS quantum dots and Ba F_(2):Tm^(3+) nanocrystals co-doped glass for ultra-broadband near-infrared emission [Invited]

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Chinese Optics Letters 2022年第2期20卷 125-130页

作者： Wei Wang Qinpeng Chen Yifei Zhao Yakun Le Shengda Ye Mang Wan Xiongjian Huang Guoping Dong State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesGuangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesSchool of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China Department of Chemistry City University of Hong KongKowloon 999077Hong KongChina Analytical and Testing Center South China University of TechnologyGuangzhou 510640China School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China

With the rapid growth of optical communications traffic,the demand for broadband optical amplifiers continues to *** is necessary to develop a gain medium that covers more optical communication *** precipitated PbS quantum dots(QDs) and Ba F_(2):Tm^(3+) nanocrystals (NCs) in the same glass to form two independent emission *** Ba F_(2)NCs in the glass can provide a crystal field environment with low phonon energy for rare earth (RE) ions and prevent the energy transfer between RE ions and PbS *** adjusting the heat treatment schedule,the emission of the two luminescence centers from PbS QDs and Tm^(3+) ions perfectly splices and covers the ultra-broadband near-infrared emission from 1200 nm to 2000 nm with bandwidth over 430 ***,it is expected to be a promising broadband gain medium for fiber amplifiers.

关键词： PbS quantum dot Tm^(3+) nanocrystal-glass composite broadband near-infrared emission

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A DCA Attack Scheme and a Genetic Algorithm-based Intelligent Fault Injection Algorithm For White-Box AES Implementation

A DCA Attack Scheme and a Genetic Algorithm-based Intelligen...

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IEEE International Workshop on Anti-counterfeiting, Security, Identification, ASID

作者： Yuyang Pan Yi Wu Yulong Shang Bo Gao Yulin Zhao Zhe Ma Yanzhao Li Xin Wang Zusong Zhang Chi Wang Mi Li Ding Zhou Product Testing Department Bank Card Test Center Beijing China Industrial Development Center Beijing SanTel Technology and Trading Co. Ltd. Beijing China Project Development Department Zhiyun Hezhong (Beijing) Technology Co. Ltd. Beijing China Research Institute Shenzhen State Microelectronics Co. Ltd. Shenzhen China Huawei Technologies Co. Ltd. Shenzhen China Beijing Institute of Automatic Control Equipment Beijing China

In this paper we attack the white-box AES implementation with Differential Correlation Analysis (DCA) and fault injection, which are major risks the white-box AES implementation is facing now. A differential computation analysis (DCA) attack strategy is presented targeted at the implementation of the white-box AES algorithm based on a combination T-box. Using the DCA attack method, 16 subkeys are extracted successfully, which underscores the presence of a notable side-channel security vulnerability within the white-box AES encryption scheme. In order to improve the protection ability of the scheme against side-channel attacks, the enhanced rotating S-box masking scheme is adopted. No security risk has been detected which proves the validity of the mask scheme. Moreover, this research performs the fault injection attack on white-box implementation. However, the process typically demands substantial time and resources due to its manual testing nature. To optimize the method, we introduce an intelligent fault injection algorithm utilizing a genetic algorithm, which automates the fault injection attack to white-box implementation. This proposed scheme exemplifies intelligence and automation in the testing process. The empirical comparison highlights that the automated fault injection algorithm significantly enhances attack efficiency by 980% when compared to the random parameter search method.

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Synthesis and characterization of nano dicalcium phosphate dihydrate from biogenic sources

Results in Materials

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Results in Materials 2025年 25卷

作者： Alam, Md. Kawcher Sahadat Hossain, Md. Akash, Mofassel Hossen Bashar, Muhammad Shahriar Bahadur, Newaz Mohammed Ahmed, Samina Glass Research Division Institute of Glass & Ceramic Research and Testing Bangladesh Council of Scientific and Industrial Research (BCSIR) Dhaka 1205 Bangladesh Department of Applied Chemistry and Chemical Engineering Noakhali Science and Technology University Noakhali Bangladesh Institute of Energy Research & Development Bangladesh Council of Scientific and Industrial Research (BCSIR) Dhaka 1205 Bangladesh

In the present study, calcium-enriched marine sources (Turritella, Cardium, and Conch shells) were used to prepare dicalcium phosphate dihydrate (DCPD) in an easy, affordable, and sustainable manner. To produce DCPD, orthophosphoric acid was subjected to a reaction with each type of shell powdered substance, resulting in DCPD in a sheet-like or irregular-type shape. The powdered materials were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and Fourier-transform infrared spectroscopy (FT-IR). FT-IR spectroscopy was employed to determine the presence of functional groups in the prepared DCPD. SEM image confirms plate-like structure, indicating homogeneity in both size and shape. EDX spectrum confirms the presence of Ca, P, and O and the degree of purity of all produced materials. The crystallite size of nano DCPD is determined by a variety of XRD models using the XRD pattern. An acceptable measurement for crystallite size was also obtained using the Size-Strain Plot (17.55, 27.18, 35.55 nm) and Halder-Wagner Model (11.23, 13.15, 28.57 nm). Many crystallographic properties of the synthesized substances were examined, including dislocation density, crystallinity index, relative intensity, preference growth, and microstrain. The DCPD percentage obtained by Rietveld refinement analysis is close to 90 %. Therefore, Turritella, Cardium, and Conch shells will provide an alternate source to fulfil the need for raw materials to manufacture DCPD. © 2025 The Authors

关键词： Calcium carbonate Crystallite size Texture co-efficient Waste source

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Morphological change of ZnO using hydrothermal technique and organic modifiers

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Nano-Structures and Nano-Objects 2025年 41卷

作者： Alam, Md. Kawcher Sahadat Hossain, Md. Akash, Mofassel Hossen Miad, Abdullah Al Bashar, Muhammad Shahriar Bahadur, Newaz Mohammed Ahmed, Samina Glass Research Division Institute of Glass & Ceramic Research and Testing Bangladesh Council of Scientific and Industrial Research (BCSIR) Dhaka 1205 Bangladesh Department of Applied Chemistry and Chemical Engineering Noakhali Science and Technology University Noakhali Bangladesh Institute of Energy Research & Development Bangladesh Council of Scientific and Industrial Research (BCSIR) Dhaka 1205 Bangladesh

This study provides the findings of a novel synthesis of zinc oxide (ZnO) nanoparticles by hydrothermal method. ZnO nanoparticles were synthesized using different organic solvents such as ethylene glycol (EG) and citric acid (CA) as a reaction medium. Utilizing X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and Fourier transform infrared (FT-IR) spectroscopy, the formed nanoflower and nanosphere zinc oxide were characterized. The studies' findings showed that the solvents controlled the dimension and morphology of the formed nanoparticles. X-ray diffraction (XRD) confirmed the formation of the ZnO, and the crystallite size (Scherrer method) of the produced nanoflowers and nanospheres was found to be 46.18 nm and 31.72 nm, respectively. It was evident from the peak of the FT-IR spectrum between 432 and 551 cm^-1 that the ZnO phase is contained in the produced nanoparticles. Using Rietveld refinement analysis, it has been found that the ZnO phase is almost 100 % pure. © 2025 Elsevier B.V.

关键词： Crystallite Size Metal Oxide Morphology Nano-Flower

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Improving stability of MXenes

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Nano Research 2022年第7期15卷 6551-6567页

作者： Jizhou Jiang Saishuai Bai Jing Zou Song Liu Jyh-Ping Hsu Neng Li Guoyin Zhu Zechao Zhuang Qi Kang Yizhou Zhang School of Environmental Ecology and Biological Engineering School of Chemistry and Environmental EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of TechnologyWuhan 430205China Key Laboratory of Rare Mineral Ministry of Natural ResourcesGeological Experimental Testing Center of Hubei ProvinceWuhan 430034China Institute of Chemical Biology and Nanomedicine(ICBN) State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringCollege of BiologyHunan UniversityChangsha 410082China Department of Chemical Engineering “National Taiwan University”Taipei 10617TaiwanChina State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Institute of Advanced Materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing 210044China Department of Chemistry Tsinghua UniversityBeijing 100084China Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China

Due to their superior hydrophilicity and conductivity,ultra-high volumetric capacitance,and rich surface-chemistry properties,MXenes exhibit unique and excellent performance in catalysis,energy storage,electromagnetic shielding,and life *** they are derived from ceramics(MAX phase)through etching,one of the challenges in MXenes preparation is the inevitable exposure of metal atoms on their surface and embedding of anions and *** the as-obtained MXenes are always in a thermodynamically metastable state,they tend to react with trace oxygen or oxygen-containing groups to form metal oxides or degrade,leading to sharply declined activity and impaired ***,improving the stability of MXenesbased materials is of practical significance in relevant ***,there lacks a comprehensive review in the literature on relevant *** help promote the wide applications of MXenes,we review from the following aspects:(i)insights into the factors affecting the stability of MXenes-based materials,including oxidation of MXenes flakes,stability of MXenes colloidal solutions,and swelling and degradation of MXenes thin-film,(ii)strategies for enhancing the stability of MXenes-based materials by optimizing MAX phase synthesis and modifying the MXenes preparation,and(iii)techniques for further increasing the stability of freshly prepared MXenes-based materials via controlling the storage conditions,and forming shielding on the surface and/or edge of MXenes ***,some outlooks are proposed on the future developments and challenges of highly active and stable *** aim to provide guidance for the design,preparation,and applications of MXenes-based materials with excellent stability and activity.

关键词： MXenes stability oxidation swelling and degradation shielding strategies

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Low-temperature spatial atomic layer deposited Ga2O3 films for high-performance flexible deep ultraviolet photodetector

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Materials Letters 2023年 340卷

作者： Hsu, Chia-Hsun Zhu, Run-Feng Kang, Pin-Chun Gao, Peng Wu, Wan-Yu Wuu, Dong-Sing Lien, Shui-Yang Zhu, Wen-Zhang Xiamen Key Laboratory of Development and Application for Advanced Semiconductor Coating Technology School of Opto-electronic and Communication Engineering Xiamen University of Technology Xiamen361026 China National Measurement and Testing Center for Flat Panel Display Industry Xiamen Institute of Measurement and Testing Xiamen361004 China Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Department of Materials Science and Engineering National United University Miaoli36063 Taiwan Department of Applied Materials and Optoelectronic Engineering National Chi Nan University Nantou54561 Taiwan Department of Materials Science and Engineering Da-Yeh University Changhua51591 Taiwan

This research aims to prepare amorphous gallium oxide (α-Ga2O3) films for use in flexible deep ultraviolet photodetectors. The films are deposited using high-speed spatial atomic layer deposition (SALD) at different substrate temperatures. The experimental results show that the saturating deposition rate at 145–155 °C is four to sixteen times higher than that of temporal ALD. Moreover, under the saturated SALD conditions the deposited film has less carbon impurities, oxygen-related defects, and greater compactness than under non-saturated conditions. Finally, a high-performance flexible deep ultraviolet α-Ga2O3 photodetector with fast decay time of 161 µs and low dark current density of 6.8 × 10-10 A/cm2 is achieved. © 2023 Elsevier B.V.

关键词： Gallium compounds

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Plasma Power Effect on Crystallinity and Density of Peald-Aln Thin Films： Toward Increasing Dielectric Constant and Breakdown Electric Field

SSRN

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SSRN 2023年

作者： Zhang, Xiao-Ying Peng, Duan-Chen Yan, Jia-Hao Zhang, Zhi-Xuan Ruan, Yu-Jiao Zuo, Juan Xie, An Wu, Wan-Yu Wuu, Dong-Sing Huang, Chien-Jung Lai, Feng-Min Lien, Shui-Yang Zhu, Wen-Zhang Xiamen Key Laboratory of Development and Application for Advanced Semiconduc tor Coating Technology School of Opto-electronic and Communication Engineering Xiamen University of Technology Xiamen361024 China National Measurement and Testing Center for Flat Panel Display Industry Xiamen Institute of Measurement and Testing Xiamen361024 China School of Materials Science and Engineering Xiamen University of Technology Xiamen361024 China Department of Materials Science and Engineering National United University Miaoli36063 Taiwan Department of Applied Materials and Optoelectronic Engineering National Chi Nan University Nantou54561 Taiwan Department of Applied Physics National University of Kaohsiung Kaohsiung University Rd. Kaohsiung81148 Taiwan Department of Biomedical Engineering Da-Yeh University Changhua51591 Taiwan

Aluminum nitride (AlN) film is a promising material which is used in various fields. In this study, AlN films with different plasma powers were grown by remote plasma atomic layer deposition. Saturation experiments have been applied in the plasma power between 1000 and 3000 W. The influence of plasma power on preferential orientation, chemical, optical, and electrical properties of AlN films are investigated. AlN films displayed multiphase hexagonal wurtzite crystal structure with (002) preferential orientation for higher plasma power, while the predominant orientation shifted toward (100) at lower plasma power. The optical emission spectroscopy analyses show that NH and NH2 radicals conduce to the deposition of AlN films and H radicals selectively dissociate Al-OH bonds which were on AlN film surface and etch deposition films. AFM measurements show that the 1500 W prepared AlN film with smallest surface roughness may be related to the relatively smaller concomitant crystal grains of (100) and (002). X-ray photoelectron spectroscopy investigation presents that oxygen content decreases as the plasma power increases. The obtained maximum value of dielectric constant and breakdown electrical field of AlN film deposited at 3000 W is 8.23 and 5.42 MV/cm, respectively. © 2023, The Authors. All rights reserved.

关键词： Aluminum nitride

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A review on effect of nanoparticle addition on thermal behavior of natural fiber–reinforced composites

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Heliyon 2025年第1期11卷 e41192页

作者： Balaji, D. Kumar, P. Sathish Bhuvaneshwari, V. Rajeshkumar, L. Singh, Manoj Kumar Sanjay, M.R. Siengchin, Suchart Department of Mechanical Engineering KPR Institute of Engineering and Technology Tamil Nadu Coimbatore 641407 India Centre for Research and Development KPR Institute of Engineering and Technology Tamil Nadu Coimbatore 641407 India Natural Composites Research Group Lab Department of Materials and Production Engineering The Sirindhorn International Thai-German Graduate School of Engineering King Mongkut's University of Technology North Bangkok Bangkok 10800 Thailand AU-Sophisticated Testing and Instrumentation Centre and Department of Mechanical Engineering Alliance School of Applied Engineering Alliance University Karnataka Bengaluru 562106 India

Always, the environment in which humans live needs to be saved from various calamities, and one such calamity is usage of petroleum-based products. Petroleum-based products are derived from various synthetic processes that adversely affect the environment. It may not reflect immediately, but it affects in the near future. They are non-environmentally friendly and cannot progress toward the sustainability factor. The alternative to metallic or synthetic fibers is natural fibers that are derived from plant sources. The demerits of using natural fiber is its less strength;however, this strength can be enhanced by incorporating it as a strengthening component in polymer matrix composite (PMC) materials. Still, the major advantage of using metal is its ability to withstand higher temperatures, whereas PMCs fail in these characteristics. The use of nanoparticles as fillers in the natural fiber–reinforced PMCs is a probable solution to the above problem. This review assesses the thermal characteristics of various nanoparticle-filled natural fiber–based polymer composites. It can be seen from most of the research that the filled polymer composites exhibit better thermal behavior compared with non-filled polymer composites. This consolidation would be useful for researchers to further accelerate their research in this domain. © 2024 The Authors

关键词： Nanoparticle Natural fibers Polymer composites Thermal behavior

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Exploring Lead-Free Perovskite-Inspired Materials as Pressed Pellets for X-ray Detector Application

Exploring Lead-Free Perovskite-Inspired Materials as Pressed...

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IEEE Symposium on Nuclear Science (NSS/MIC)

作者： O. L. Maslyanchuk A. Starkholm E. Unger D. Al-Sabbagh F. Emmerling L. Kloo P. H. Svensson S. Sarisozen D. Neher F. Lang Helmholtz-Zentrum Berlin Solution-Processing of Hybrid Materials and Devices Berlin Germany Materials Chemistry Federal Institute for Materials Research and Testing Berlin Germany Department of Chemistry Applied Physical Chemistry KTH Royal Institute of Technology Stockholm Sweden RISE Research Institutes of Sweden Chemical and Pharmaceutical Development Södertälje Sweden Physics of Soft Matter University of Potsdam Potsdam Germany

ISBN: (数字)9798350388152

ISBN: (纸本)9798350388169

Highly sensitive X-ray detectors based on materials containing high atomic-number elements, such as metal halide perovskites (MHPs), would enable reduced dose rates, which is vital for medical applications. However, the instability and the potential toxicity of conventional lead-based MHPs constitute a challenge for commercialization, which prompts the use of alternative perovskite inspired materials based on less toxic elements, such as bismuth and silver to replace lead. Furthermore, to enable large-area, highperformance, detectors, it is paramount to employ methods to produce high-quality, millimetre-thick, layers of the detector material, which currently remains a challenge for MHPs. In this work, different lead-free, perovskite-inspired, materials, which include fully inorganic compounds, such as the double perovskite Cs 2 AgBiBr 6 , as well as novel organic-inorganic ones were investigated as X-ray detectors. The materials were synthesized using ball-milling and polycrystalline pellets produced through scalable cold isostatic-pressing were used to assemble X-ray detectors. X-ray-based spectroscopic and diffraction methods were used to determine the composition and structural properties of the pellets. The detector performance was evaluated by measuring the photocurrent response under X-ray illumination. The results show that the selection of composition, additives, different post-treatment methods of the pellets as well as device architecture significantly affect the properties, potentially improving detector performance for various applications. The obtained sensitivities and detection limits are comparable to or even higher than those reported for similar perovskite-inspired materials. The work demonstrates that the materials are very promising, and could thus pave the way for future application of these materials as X-ray detectors.

关键词： Performance evaluation Silver Semiconductor device measurement X-ray detectors Toxicology Sensitivity Semiconductor detectors

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Superior Performance of ZnGaO Solar-Blind Photodetectors by Implementing TFT Structure and Tunable ZNO Cycle Ratio

SSRN

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SSRN 2024年

作者： Fan, Hui-Chen Wang, Chen Xu, Yi-Hong Fan, Teng-Min Huang, Pao-Hsun Ruan, Yu-Jiao Wu, Tingzhu Kuo, Hao-Chung Wuu, Dong-Sing Lai, Feng-Min Lien, Shui-Yang Xiamen Key Laboratory of Development and Application for Advanced Semiconductor Coating Technology School of Opto-Electronic and Communication Engineering Xiamen University of Technology Xiamen361024 China School of Ocean Information Engineering Jimei University Jimei District Fujian Xiamen361021 China National Measurement and Testing Center for Flat Panel Display Industry Xiamen Institute of Measurement and Testing Xiamen361024 China National Integrated Circuit Industry and Education Integration Innovation Platform Department of Electronic Science Xiamen University Xiamen361005 China Department of Photonics Graduate Institute of Electro-Optical Engineering College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu30010 Taiwan Department of Applied Materials and Optoelectronic Engineering National Chi Nan University Nantou54561 Taiwan Department of Biomedical Engineering Da-Yeh University Changhua51591 Taiwan

In this study, plasma enhanced atomic layer deposition was used to prepare ZnGaO thin films with different ZnO cycle ratios from 0% to 50%, which were employed to fabricate the MSM-type and TFT-type solar-blind photodetector. The properties of the films and the performance of the solar blind photodetector are greatly affected by the ZnO cycle ratio. Appropriate Zn doping content decreases the ratio of oxygen vacancies and Zn interstitials in Ga2O3, while excessive Zn doping degrades the quality of the film. Compared to MSM-type photodetector, an obviously improved performance of ZnGaO TFT-type photodetector has been observed due to its self-amplified photocurrent and the reduced dark current controlled by gate voltage. At a ZnO cycle ratio of 40%, a superior performance of TFT-type solar-blind photodetector with an ultra-low dark current ~4.5×10-13 A, an excellent light switching ratio ~2.2×107, and an outstandingly high sensitivity ~34.31 A/W has been obtained. These results demonstrate that the incorporation of Zn dopants can effectively modulate the performance of Ga2O3 TFT-type photodetector providing a great perspective for cost-effective and high-performance solar-blind PDs. © 2024, The Authors. All rights reserved.

关键词： Zinc oxide

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