Results 61 to 70 of about 13,698 (193)

Band Edge Reorganization via Symmetry Constraints in Covalent Bonding Heterojunctions Boosts Photocatalytic Metronidazole Degradation

open access: yesRare Metals, EarlyView.
ABSTRACT The covalent bonds at heterojunction interfaces enable more efficient charge carrier separation than traditional weakly coupled heterojunctions, with enhanced photocatalytic performance for organic wastewater purification. The interfacial covalent bonds drive energy band reorganization, rendering the conventional independent band edge ...
Jing‐Yu Ren   +5 more
wiley   +1 more source

Modification of Ge surface by plasma technology and its application in GOI and Al/n-Ge contact [PDF]

open access: yes, 2016
锗材料由于具有比硅材料高的电子和空穴迁移率,在通信波段有较高的吸收系数并且与成熟的硅工艺相兼容等优点,使其成为下一代高性能微电子器件的首选替代材料。然而Ge器件存在着漏电流大的致命缺点,同时Ge器件尺寸的缩小会引入一些小尺寸效应。绝缘体上锗(Germanium-on-Insulator,GOI)结合了Ge材料及SOI(Silicon-on-Insulator)结构的优点,其独特的全介质隔离结构可以很好地解决体Ge材料器件的不足。虽然采用智能剥离技术(Smart-cutTM ...
赖淑妹
core  

Multifunctionality of Magnetic La(Fe, Si/Al)13‐Based Materials: Negative Thermal Expansion and Magnetocaloric Effect

open access: yesRare Metals, EarlyView.
ABSTRACT In recent years, the field of magnetic materials has witnessed a paradigm shift from single‐function applications to multifunctional integration, driven by the growing demand for smart materials in advanced technologies. Among various magnetic systems, La(Fe, Si/Al)13‐series materials have emerged as particularly promising candidates due to ...
Irfan Liaquat   +2 more
wiley   +1 more source

Transition metal compounds and alloys: A first-principles investigation [PDF]

open access: yes, 2015
含过渡金属的化合物与合金在数据存储、光催化和能量存储与转换等领域有重要的应用,主要得益于其特定的电子结构、力学性能等性质。本论文利用基于密度泛函理论的第一性原理计算方法,选取特定的研究体系,系统地探索了过渡金属化合物与合金的电子结构(第三章)、内部原子扩散(第四章)、力学性能(第五章)以及压力与温度对其性质的影响(第六章)。 为了研究缺陷和掺杂对过渡金属氧化物电子结构的调制,我们以SrZrO3为研究对象,首先研究了内部含有有序氧空位和部分无序氧空位体系的电子结构。计算结果表明 ...
郭忠路
core  

Electronic Modulation of Cu Sites via Iron Incorporation in Cu5FeS4 Bimetallic Sulfide for High‐Efficiency Oxygen Reduction Reaction

open access: yesRare Metals, EarlyView.
ABSTRACT The sluggish kinetics of the oxygen reduction reaction (ORR) necessitate developing oxygen electrodes with enhanced electrocatalytic activity for practical zinc–air battery applications. In this study, an iron‐doped copper sulfide electrocatalyst (CuFeNS‐PNC) anchored on metal–organic framework‐derived carbon substrates was designed, featuring
Taichong Chitboonyakasem   +4 more
wiley   +1 more source

添加剂粉料的颗粒度对ZnO压敏电阻通流能力的影响

open access: yesDianci bileiqi, 1996
ZnO压敏电阻的原材料中,除了主原料ZnO粉的颗粒形状和大小对压敏电阻性能产生影响外,添加剂粉料的颗粒度也会对压敏电阻性能产生影响,尤其会影响压敏电阻的通流能力。本文采用液相化学方法制备了颗粒细的添加剂粉,结果表明,采用液相化学方法对添加剂进行处理是提高压敏电阻通流能力的一条有效途径。
袁方利, 季幼章
doaj  

Controllable growth of Hexagonal Boron Nitride/Graphene Heterostructures [PDF]

open access: yes, 2017
具有sp2杂化碳原子紧密排列的六角蜂窝状结构的石墨烯,展现出许多优异的物理化学特性,使其在透明导电膜、场效应晶体管、传感器、储能材料等领域都具备极大的应用前景。除石墨烯以外,一系列具有相似结构的二维层状材料包括六方氮化硼(h-BN)、过渡金属硫化物(MoS2、WS2等)等相继被发现。其中h-BN凭借着其与石墨烯相似的结构以及展现出来的宽禁带、低介电常数、高机械强度等独特优异的特性受到极大的关注。尤其h-BN与石墨烯堆叠组成的异质结更是展现出光诱导掺杂、新狄拉克点和霍夫斯塔特蝴蝶等不同于单一材料的性能 ...
李秀婷
core  

Cu‐Enhanced Medium‐Entropy TiZrCoCrMo Alloys: Balancing Superior Antibacterial and Osteogenic Properties for Orthopedic Implants

open access: yesRare Metals, EarlyView.
ABSTRACT This study introduces novel nonequiatomic TiZrCoCrMoCux (x = 0, 5, 10; at%) medium‐entropy alloys (MEAx) tailored for orthopedic implants, synergistically combining the biocompatibility of Ti‐based alloys, the wear resistance of CoCrMo alloys, and the antibacterial/osteogenic attributes of Cu. The alloy's microstructure, mechanical properties,
Hang Yu   +9 more
wiley   +1 more source

化学沉淀法的醇水比对氧化锌压敏电阻性能的影响研究

open access: yesDianci bileiqi
通过化学沉淀法制备得到ZnO压敏电阻样品并分析研究了样品的显微结构特性、宏观电学参量和介电响应特性,包括阻抗谱和介电损耗谱。采用XRD和SEM观测分析了ZnO压敏电阻的物相组成和微观结构。电学参数测试结果表明,当化学沉淀法的醇水比为2∶1时,ZnO压敏电阻表现出的各项电性能均比较好:电压梯度为584.01 V/mm,非线性系数为73.43,泄漏电流为0.13 μA/cm2。该结果表明化学沉淀法可以作为制造高性能ZnO压敏电阻的有效途径。另外,通过介电谱的测试结果可以看出 ...
董曼玲   +6 more
doaj  

Investigation on atomic layer deposition of HfOxNy film and its resistive switching device [PDF]

open access: yes, 2017
随着半导体技术的不断发展,目前占据非易失性存储器市场主流的闪存存储器由于器件等比例缩小带来的电荷泄漏、可靠性差等一系列难以克服的问题发展受到制约。近年来一种新型阻变存储器(RRAM)的研究正得到广泛关注,有望成为下一代主流非挥发存储器。与传统存储器相比,RRAM具有结构简单、存储密度高和功耗低等优势。尽管阻变特性在过渡金属氧化物、氮化物、硫系材料和非晶硅等材料体系中都得到广泛研究,但是基于氮氧化物的阻变特性研究还较为缺乏。氮氧化物与CMOS工艺兼容,热稳定性好。本论文选取HfOxNy作为阻变功能材料 ...
余珏
core  

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