Results 131 to 140 of about 10,115,539 (327)

Achieving High ON State Current through Ferroelectric Polarization‐Dependent Interfacial Resistance Switching in Undoped Orthorhombic HfO2 Films

open access: yesAdvanced Functional Materials, EarlyView.
Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand   +13 more
wiley   +1 more source

Solvothermal synthesis and properties of Layered/Spinel heterostructured Li-rich and Mn-based cathode materials of Li-ion batteries [PDF]

open access: yes, 2016
随着化石能源的快速消耗和环境污染问题的日益突出,人类社会的可持续发展对于电动汽车的需求日渐迫切。具有较高能量密度的锂离子电池已成为了新能源极为重要的组成部分。相较于负极材料,正极材料是进一步提高锂离子电池能量密度的决定性因素,也决定着锂电池的安全性能及使用寿命。其中,富锂锰基固溶体材料(Li2MnO3•LiMO2)具有较高的放电比容量(≥250mAh/g)、低成本、较好的热稳定性等优点受到了广泛关注,并被认为是极具前景的下一代锂离子电池正极材料。但富锂材料存在的一些的问题严重制约了其发展应用,
邓亚平
core  

Rate‐Adaptive Site Transformation Catalyst for Parallel Water Dissociation and Hydrogen Adsorption in Alkaline Hydrogen Evolution

open access: yesAdvanced Functional Materials, EarlyView.
This work presents a rate‐adaptive site transformation strategy in Ag‑ethylenediamine intercalated Co9S8, which not only enables parallel water dissociation and H* adsorption, but also allows the catalyst to provide more active sites under high demand, removing a major bottleneck. The catalyst achieves a record current density of 4.2 A cm−2@2.0 V, with
Yongqi Ye   +3 more
wiley   +1 more source

CdSe nanorod/TiO2 nanoparticle heterojunctions with enhanced solar- and visible-light photocatalytic activity

open access: yesBeilstein Journal of Nanotechnology, 2017
CdSe nanorods (NRs) with an average length of ≈120 nm were prepared by a solvothermal process and associated to TiO2 nanoparticles (Aeroxide® P25) by annealing at 300 °C for 1 h. The content of CdSe NRs in CdSe/TiO2 composites was varied from 0.5 to 5 wt
Fakher Laatar   +7 more
doaj   +1 more source

Atomic Layer Deposition in Transistors and Monolithic 3D Integration

open access: yesAdvanced Functional Materials, EarlyView.
Transistors are fundamental building blocks of modern electronics. This review summarizes recent progress in atomic layer deposition (ALD) for the synthesis of two‐dimensional (2D) metal oxides and transition‐metal dichalcogenides (TMDCs), with particular emphasis on their enabling role in monolithic three‐dimensional (M3D) integration for next ...
Yue Liu   +5 more
wiley   +1 more source

Sensitized Triplet Exciton Generation in Nanostructured Polymer Scintillators: Toward Improved γ/Neutron Discrimination

open access: yesAdvanced Functional Materials, EarlyView.
Rapid γ/neutron discrimination through PSD is achieved in liquid droplet containing nanostructured polymeric scintillator where a TTA‐active dye is dissolved. The inclusion of a properly selected and dosed sensitizer metalated porphyrin enhances discrimination sensitivity and speed by doubling the density of annihilating triplets and increasing the ...
Luca Pollice   +9 more
wiley   +1 more source

Creating multifunctionality with hierarchical heterostructures

open access: yesMaterials Research Letters
Materials with multifunctionalities are essential for saving energy and conserving natural resources, but intrinsic multiple trade-offs among material properties often limit the development of next-generation multifunctional materials.
Yuntian Zhu
doaj   +1 more source

A route to room temperature ferromagnetic ultrathin SrRuO$_3$ films

open access: yes, 2015
Experimental efforts to stabilize ferromagnetism in ultrathin films of transition metal oxides have so far failed, despite expectations based on density functional theory (DFT) and DFT+U. Here, we investigate one of the most promising materials, SrRuO$_3$
Held, Karsten   +3 more
core   +2 more sources

Multi‐Functional ZnO–Te Heterojunction Devices Enabling Compact Frequency Quadrupler

open access: yesAdvanced Functional Materials, EarlyView.
Wafer‐scale ZnO–Te heterojunction devices featuring tunable double negative differential transconductance (D‐NDT) are demonstrated at ≤ 200°C. Leveraging this unique characteristic, a single‐stage frequency quadrupler is realized, achieving a 64%–75% reduction in device count.
Jae Hyeon Jun   +8 more
wiley   +1 more source

Ultrafast Charge Transfer in Atomically Thin MoS2/WS2 Heterostructures

open access: yes, 2014
Van der Waals heterostructures have recently emerged as a new class of materials, where quantum coupling between stacked atomically thin two-dimensional (2D) layers, including graphene, hexagonal-boron nitride, and transition metal dichalcogenides (MX2),
Hong, Xiaoping   +9 more
core   +1 more source

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