检索结果-内蒙古大学图书馆

Smart Soft materials with Multiscale Architecture and Dynamic Surface Topographies

Accounts of materials Research 2022年第11期3卷 1115-1126页

作者： Songshan Zeng Andrew T.Smith Kuangyu Shen Luyi Sun Polymer Program Institute of Materials Science and Department of Chemical&Biomolecular EngineeringUniversity of ConnecticutStorrsConnecticut 06269United StatesPresent Address:Macao Institute of Materials Science and Engineering(MIMSE)Zhuhai MUST Science and Technology Research InstituteFaculty of Innovation EngineeringMacao University of Science and TechnologyTaipa999078MacaoChina Polymer Program Institute of Materials Science and Department of Chemical&Biomolecular EngineeringUniversity of ConnecticutStorrsConnecticut 06269United States

CONSPECTUS:Smart soft materials have one or more characteristics that can be significantly altered in convertible fashions by external stimuli,such as light,moisture,mechanical force,temperature,electric/magnetic fields,pH,and so *** materials can lead to widespread application in multifunctional smart ***,various smart soft materials have been developed under the inspiration of the intriguing multiscale structures,adaptive mechanisms,and dynamic responses of natural life,with an aim to further design advanced material systems with novel,intriguing,and unprecedented properties.

关键词： Smart properties. Dynamic

来源：评论

学校读者我要写书评

暂无评论

Inserted Al2O3Barrier Layer for Improvement in Stability of Mini Light Emitting Diodes

引用

IEEE Transactions on Electron Devices 2023年第10期70卷 5163-5168页

作者： Hsu, Chia-Hsun Luo, Hai-Long Li, Shi-Tao Bian, Fu-Qiang Gao, Peng Wu, Wan-Yu Wuu, Dong-Sing Lai, Feng-Min Lien, Shui-Yang Zhu, Wen-Zhang Xiamen University of Technology Xiamen Key Laboratory of Development and Application for Advanced Semiconductor Coating Technology School of Opto-Electronic and Communication Engineering Xiamen361026 China Silan Academy of Compound Semiconductor Technology Xiamen361026 China Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian350002 China National United University Department of Materials Science and Engineering Miaoli36063 Taiwan National Chi Nan University Department of Applied Materials and Optoelectronic Engineering Puli54561 Taiwan Da-Yeh University Department of Biomedical Engineering Changhua51591 Taiwan

In this work, aluminum oxide (Al2O3) films are grown using atomic layer deposition (ALD) with trimethylaluminum (TMA) and water, and inserted into blue mini-light-emitting diodes (mini-LEDs) as a moisture barrier layer to provide chip-level encapsulation. The effect of the inserted Al2O3 layer on the stability of the mini-LED performance is investigated. The experimental results show that the optimized substrate temperature for preparing the Al2O3 films under self-limiting surface reaction conditions and linear growth is in the range of 200 °C-250 °C. The highest film density, lowest impurity content, and lowest water vapor transmission rate (WVTR) can be obtained at 250 °C. The performance of the mini-LEDs with the Al2O3 layer does not degrade after 1000 h in 85% relative humidity (RH) and 85 °C temperature aging conditions, while the device without the moisture layer completely fails after 500 h. The degradation is found to be related to the increased series resistance and ideality factor of the devices. Moreover, it is found that the addition of the Al2O3 moisture layer improves the light intensity of mini-LEDs. The inserted Al2O3 layer with a simple process and thin thickness is therefore capable of providing excellent resistance against high humidity and high temperature environment for mini-LEDs. © 1963-2012 IEEE.

关键词： Aluminum oxide

来源：评论

学校读者我要写书评

暂无评论

Filterless narrowband photodetectors enabled by controllable band modulation through ion migration: The case of halide perovskites

引用

InfoMat 2024年第1期6卷 123-138页

作者： Yu Li Shanshan Yu Junjie Yang Kai Zhang Mingyu Hu Weitao Qiu Fumin Guo Wei Qian Sean Reinecke Tao Chen Makhsud I.Saidaminov Jian Wang Shihe Yang Guangdong Provincial Key Lab of Nano-Micro Materials Research School of Chemical Biology and BiotechnologyShenzhen Graduate SchoolPeking UniversityShenzhenGuangdongthe People's Republic of China Shenzhen Bay Laboratory Institute of Biomedical EngineeringShenzhenGuangdongthe People's Republic of China School of Advanced Materials Shenzhen Graduate SchoolPeking UniversityShenzhenGuangdongthe People's Republic of China Department of Chemistry The University of Hong KongHong Kong SARthe People's Republic of China Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefeiAnhuithe People's Republic of China College of Materials and Energy South China Agricultural UniversityGuangzhouGuangdongthe People's Republic of China Department of Chemistry University of VictoriaVictoriaBritish ColumbiaCanada

Narrowband photodetectors conventionally rely on optical structure design orbandpass filters to achieve the narrowband regime. Recently, a strategy forfilterless narrowband photoresponse based on the charge collection narrowing(CCN) mechanism was reported. However, the CCN strategy requires an electrically and optically “thick” photoactive layer, which poses challenges in controlling the narrowband photoresponse. Here we propose a novel strategy forconstructing narrowband photodetectors by leveraging the inherent ion migration in perovskites, which we term “band modulation narrowing” (BMN). Bymanipulating the ion migration with external stimuli such as illumination,temperature, and bias voltage, we can regulate in situ the energy-band structure of perovskite photodetectors (PPDs) and hence their spectral *** the Fermi energy levels obtained by the Kelvin probe force microscopy, the internal potential profiles from solar cell capacitance simulator simulation, and the anion accumulation revealed by the transient ion-drifttechnique, we discover two critical mechanisms behind our BMN strategy: theextension of an optically active but electronically dead region proximal to the top electrode and the down-bending energy bands near the electron transportlayer. Our findings offer a case for harnessing the often-annoying ionmigration for developing advanced narrowband PPDs.

关键词： band structure ion migration narrowband detection perovskite spatial distribution of charge carriers

来源：评论

学校读者我要写书评

暂无评论

Dynamics of self-hybridized exciton–polaritons in 2D halide perovskites

引用

Light(science & Applications) 2024年第1期13卷 13-22页

作者： Surendra B.Anantharaman Jason Lynch Christopher E.Stevens Christopher Munley Chentao Li Jin Hou Hao Zhang Andrew Torma Thomas Darlington Francis Coen Kevin Li Arka Majumdar PJames Schuck Aditya Mohite Hayk Harutyunyan Joshua R.Hendrickson Deep Jariwala Department of Electrical and Systems Engineering University of PennsylvaniaPhiladelphiaPA19104USA KBR Inc. BeavercreekOH45431USA Air Force Research Laboratory Sensors DirectorateWright-Patterson Air Force BaseOH45433USA Department of Physics University of WashingtonSeattleWA98195USA Department of Physics Emory UniversityAtlantaGA30322USA Department of Chemical and Biomolecular Engineering Rice UniversityHoustonTX77005USA Department of Materials Science and Nanoengineering Rice UniversityHoustonTX77005USA Applied Physics Program Smalley‐Curl InstituteRice UniversityHoustonTX77005USA Department of Mechanical Engineering Columbia UniversityNew YorkNY10027USA Department of Electrical and Computer Engineering University of WashingtonSeattleWA98195USA

Excitons,bound electron–hole pairs,in two-dimensional hybrid organic inorganic perovskites(2D HOIPs)are capable of forming hybrid light-matter states known as exciton-polaritons(E–Ps)when the excitonic medium is confined in an optical *** the case of 2D HOIPs,they can self-hybridize into E–Ps at specific thicknesses of the HOIP crystals that form a resonant optical cavity with the ***,the fundamental properties of these self-hybridized E–Ps in 2D HOIPs,including their role in ultrafast energy and/or charge transfer at interfaces,remain ***,we demonstrate that>0.5µm thick 2D HOIP crystals on Au substrates are capable of supporting multiple-orders of self-hybridized E–P *** E–Ps have high Q factors(>100)and modulate the optical dispersion for the crystal to enhance sub-gap absorption and *** varying excitation energy and ultrafast measurements,we also confirm energy transfer from higher energy E–Ps to lower energy E–***,we also demonstrate that E–Ps are capable of charge transport and transfer at *** findings provide new insights into charge and energy transfer in E–Ps opening new opportunities towards their manipulation for polaritonic devices.

关键词： charge polar excitation

来源：评论

学校读者我要写书评

暂无评论

A tomography slice through the entire human brain with less than three micrometer voxels 15

A tomography slice through the entire human brain with less ...

引用

15th SPIE Conference on Developments in X-Ray Tomography

作者： Humbel, Mattia Beckmann, Felix Moosmann, Julian Deyhle, Hans Schulz, Georg Tanner, Christine Rodgers, Griffin Müller, Bert Biomaterials Science Center Department of Biomedical Engineering University of Basel Hegenheimermattweg 167B/C Allschwil4123 Switzerland Institute of Materials Physics Helmholtz-Zentrum Hereon Max-Planck-Strasse 1 Geesthacht21502 Germany Department of Biomedical Engineering University of Basel Hegenheimermattweg 167B/C Allschwil4123 Switzerland

ISBN: (纸本)9781510679641

Imaging anatomical features of the human brain at cellular resolution currently relies on series of physical sections with related slicing artefacts. So far, microtomography has been employed to image an entire human brain at a voxel size of 20 µm and selected regions using 6 µm. This study aims to demonstrate the feasibility of imaging the entire human brain with cellular resolution without the need for physical sectioning using hard X-ray computed tomography. 1.2 mm high sections of two human brains, one embedded in ethanol, the other in paraffin, were imaged using microtomography at the P07 beamline at DESY, Hamburg, Germany with a monochromatic beam at 67 keV. The extended field of view necessary to cover the ca. 10 cm wide specimens at 2.54 µm voxel size was realized by projection tiling with eight to ten rings. The resulting reconstructed slices measured 39,000 × 39,000 voxels. This synchrotron radiation-based study shows the feasibility of employing X-ray tomography to image the entire human brain with isotropic voxels of 2.54 µm resolution. Next, we need to tackle the vertical stitching of several 10,000 slices of 6 GB each, posing the challenge of processing the big data of an entire PB-sized human brain and making it accessible to the research community. © 2024 SPIE.

关键词： Synchrotron radiation

来源：评论

学校读者我要写书评

暂无评论

Low-temperature synthesis of peptized TiO2 hydrosols with tunable surface charges for enhanced photocatalytic activity

引用

Ceramics International 2023年第19期49卷 32104-32115页

作者： Nahak, B.K. Mahata, D. Jhariya, N. Yadav, P. Panda, S. Sahu, S.S. Swatishree, K. Khedulkar, Akhil Pradiprao Bolloju, S. Pandit, Bidhan Mahato, S.S. Mahata, S. Department of Electronics and Communication Engineering National Institute of Science and Technology Berhampur India Department of Electronics and Telecommunication Engineering Kalinga Institute of Industrial Technology Bhubaneswar India School of Chemistry University of Glasgow Glasgow United Kingdom Department of Chemistry and Biomolecular Science Clarkson University Potsdam New York United States Department of Chemistry National Institute of Science and Technology Berhampur India Department of Biomedical and Environmental Science National Tsing Hua University Taiwan Department of Chemical Engineering National Taiwan University Taipei106 Taiwan Department of Materials Science and Engineering and Chemical Engineering Universidad Carlos III de Madrid Avenida de la Universidad 30 Leganés Madrid28911 Spain

Peptized titania sols offer numerous advantages, including uniform distribution, small particle size, good dispersibility in aqueous solutions, and strong interfacial adsorption capabilities. In this study, a novel insight into the systematic analysis of key parameters influencing the characteristics of peptized titania sols synthesized from the hydrolysis-peptization of titanium iso-propoxide (TIP) is presented. The article focuses on electrostatic stabilization, surface area dependent on various modifying conditions including H+/Ti molar ratio, solvent, pH, particle size distribution, peptizing temperature and ageing. The study also establishes the mobility of charges, facilitating charge accumulation on particle surfaces under different conditions. This resulting in enhancing electrostatic potential development in the solution, as indicated by the zeta potential value. Furthermore, the synthesized sols were used to investigate its photocatalytic performance by Methyl Violet and Rhodamine 6G organic dye degradation and other characterizations were performed to validate its properties. © 2023 Elsevier Ltd and Techna Group S.r.l.

关键词： Sols

来源：评论

学校读者我要写书评

暂无评论

Elastic and Self-Healing Copolymer Coatings with Antimicrobial Function

引用

ACS Applied materials and Interfaces 2024年第19期16卷 25194-25209页

作者： Laysandra, Livy Rusli, Randy Arthur Chen, Yu-Wei Chen, Shi-Ju Yeh, Yao-Wei Tsai, Tsung-Lin Huang, Jui-Hsiung Chuang, Kao-Shu Njotoprajitno, Andreas Chiu, Yu-Cheng Department of Chemical Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Taipei Municipal Zhongshan Girls High School Taipei10617 Taiwan Department of Biomedical Engineering College of Engineering National Cheng Kung University Tainan704 Taiwan Department of Oncology National Cheng Kung University Hospital College of Medicine National Cheng Kung University Tainan704 Taiwan Department of Green Material Technology Green Technology Research Institute CPC Corporation Kaohsiung City811 Taiwan Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei10617 Taiwan

The revolutionary self-healing function for long-term and safe service processes has inspired researchers to implement them in various fields, including in the application of antimicrobial protective coatings. Despite the great advances that have been made in the field of fabricating self-healing and antimicrobial polymers, their poor transparency and the trade-off between the mechanical and self-healing properties limit the utility of the materials as transparent antimicrobial protective coatings for wearable optical and display devices. Considering the compatibility in the blending process, our group proposed a self-healing, self-cross-linkable poly{(n-butyl acrylate)-co-[N-(hydroxymethyl)acrylamide]} copolymer (AP)-based protective coating combined with two types of commercial cationic antimicrobial agents (i.e., dimethyl octadecyl (3-trimethoxysilylpropyl) ammonium chloride (DTSACL) and chlorhexidine gluconate (CHG)), leading to the fabrication of a multifunctional modified compound film of (AP/b%CHG)-grafted-a%DTSACL. The first highlight of this research is that the reactivity of the hydroxyl group in the N-(hydroxymethyl)acrylamide of the copolymer side chains under thermal conditions facilitates the "grafting to" process with the trimethoxysilane groups of DTSACL to form AP-grafted-DTSACL, yielding favorable thermal stability, improvement in hydrophobicity, and enhancement of mechanical strength. Second, we highlight that the addition of CHG can generate covalent and noncovalent interactions in a complex manner between the two biguanide groups of CHG with the AP and DTSACL via a thermal-triggered cross-linking reaction. The noncovalent interactions synergistically serve as diverse dynamic hydrogen bonds, leading to complete healing upon scratches and even showing over 80% self-healing efficiency on full-cut, while covalent bonding can effectively improve elasticity and mechanical strength. The soft nature of CHG also takes part in improving the self-healing o

关键词： Substrates

来源：评论

学校读者我要写书评

暂无评论

Three-dimensional bio-printing of decellularized extracellular matrix-based bio-inks for cartilage regeneration:a systematic review

引用

Biomaterials Translational 2022年第2期3卷 105-115页

作者： Melika Sahranavard Soulmaz Sarkari SeyedehMina Safavi Farnaz Ghorbani Biomaterials Research Group Department of Nanotechnology and Advanced MaterialsMaterials and Energy Research CenterTehranIran Department of Biomedical Engineering Science and Research BranchIslamic Azad UniversityTehranIran Institute of Biomaterials Department of Materials Science and EngineeringUniversity of Erlangen-NurembergErlangenGermany.

Cartilage injuries are common problems that increase with the population *** is an avascular tissue with a relatively low level of cellular mitotic activity,which makes it impossible to heal *** compensate for this problem,three-dimensional bio-printing has attracted a great deal of attention in cartilage tissue *** emerging technology aims to create three-dimensional functional scaffolds by accurately depositing layer-by-layer bio-inks composed of biomaterial and *** a novel bio-ink,a decellularized extracellular matrix can serve as an appropriate substrate that contains all the necessary biological cues for cellular ***,this review is intended to provide an overview of decellularized extracellular matrix-based bio-inks and their properties,sources,and preparation *** this,decellularized extracellular matrix-based bio-inks for cartilage tissue engineering are discussed,emphasizing cell behavior and in-vivo ***,the current challenges and future outlook will be discussed to determine the conclusing remarks.

关键词： 3D bio-printing cartilage decellularization dECM tissue engineering

来源：评论

学校读者我要写书评

暂无评论

Co-modification of WO3 nanoplates with β-FeOOH/carbon quantum dots combined with plasma treatment enables high-efficiency photoelectrochemical characteristics

引用

Journal of materials Chemistry A 2024年第30期12卷 19277-19287页

作者： Lee, Jui-Teng Yan, Zhi-Cheng Lin, Kuan-Han Hsiao, Po-Hsuan Liao, Pin-Chao Pu, Ying-Chih Chen, Chia-Yun Department of Materials Science and Engineering National Cheng Kung University Tainan70101 Taiwan Program on Semiconductor Packaging and Testing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan70101 Taiwan Department of Materials Science National University of Tainan Tainan70005 Taiwan Program on Smart and Sustainable Manufacturing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan70101 Taiwan Research Center National Cheng Kung University Tainan701 Taiwan

Dual-modification strategies of conventional WO3 photoanodes are implemented to rationally modulate their photocatalytic activity under irradiation of stimulated sunlight. These are first accomplished by the uniform incorporation of β-FeOOH nanoclusters with WO3 hosts as shell/core heterostructures, followed by argon plasma treatment, which provides synergistic effects for the beneficial transmission and injection of photogenerated holes, including the dramatic increase in oxygen-vacancy mediated active sites due to the in situ formation of Fe2+/Fe3+-coexisting FeOOH facets combined with oxygen-deficient WO3 lattices, and great upward band bending at hybrid photoanode/electrolyte interfaces. Moreover, inspired by naturally existing features, such as nut/scale endowed pine-cone structures, anchoring carbon quantum dots (CQDs) on plasma-treated FeOOH/WO3 photoanodes is artificially imitated to access the band engineering of photoanode design. These multilevel structures offer an effective hole channel that facilitates the extraction of photoexcited holes and direct photovoltaic effect on CQDs, displaying a faradaic efficiency of 88.0% for oxygen generation. In addition, remarkable surface efficiency (83.3%), a substantial decrease in the open-circuit voltage (0.425 V) and interfacial charge transfer resistance (215 Ω) over those of pristine WO3 photoanodes (38.2%, 0.425 V and 2250 Ω) are observed. © 2024 The Royal Society of Chemistry.

关键词： Tungsten compounds

来源：评论

学校读者我要写书评

暂无评论

Influence of post-processing on the properties of 3D-printed poly(propylene fumarate) star polymer hydroxyapatite nanocomposites

RSC Applied Polymers

引用

RSC Applied Polymers 2023年第1期1卷 73-81页

作者： Klein, Taylor R. Kirillova, Alina Gall, Ken Becker, Matthew L. Thomas Lord Department of Mechanical Engineering and Materials Science Duke University Durham 27708 NC United States Department of Biomedical Engineering Department of Orthopaedic Surgery Duke University Durham 27708 NC United States Department of Chemistry Duke University Durham 27708 NC United States

Vat photopolymerization is able to produce intricate parts at high print speed, good part fidelity, and strong mechanical properties. However, as materials become more complex and printing technologies advance, the post-printing processing conditions of these parts must be considered. Poly(propylene fumarate) (PPF) 4-arm stars with a of degree of polymerization (DP) of 120 were photochemically 3D printed with 5 wt% hydroxyapatite (HAp) nanoparticles (<200 nm) as a filler in a nanocomposite scaffold targeted for bone regeneration applications. Nanocomposites and pure polymers were subjected to a number of post-printing processing conditions including UV post-curing times, cure temperatures and drying times in a vacuum oven. The impact of these conditions on mechanical properties were analyzed in compression, tension, and dynamic mechanical analysis (DMA). Mechanical behavior is highly tunable with the variation of each of these different processing conditions. © 2023 RSC.

关键词：

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：