Azulene-bridged coordinated framework based quasi-molecular rectifier

2017 ◽  
Vol 5 (9) ◽  
pp. 2223-2229 ◽  
Author(s):  
Sai Sun ◽  
Xiaodong Zhuang ◽  
Luxin Wang ◽  
Bin Zhang ◽  
Junjie Ding ◽  
...  
Keyword(s):  
Rectification Ratio ◽  
Cycle Stability ◽  
Promising Candidate ◽  
Practical Applications ◽  
Molecular Rectifier

A novel azulene-bridged coordinated framework based quasi-molecular rectifier exhibits typical and breakthrough stable rectification performance with an average rectification ratio as high as 5.7 and very good cycle stability over 300 cycles, rendering it a very promising candidate for practical applications.

scholarly journals Process-Induced Nanostructures on Anatase Single Crystals via Pulsed-Pressure MOCVD

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1668 ◽  
Author(s):  
Rukmini Gorthy ◽  
Susan Krumdieck ◽  
Catherine Bishop
Keyword(s):  
Metalorganic Chemical Vapor Deposition ◽  
Crystal Size ◽  
Chemical Vapor ◽  
Competitive Growth ◽  
Promising Candidate ◽  
Columnar Crystal ◽  
Practical Applications ◽  
Global Pandemic ◽  
Crystal Diameter ◽  
Plate Width

The recent global pandemic of COVID-19 highlights the urgent need for practical applications of anti-microbial coatings on touch-surfaces. Nanostructured TiO2 is a promising candidate for the passive reduction of transmission when applied to handles, push-plates and switches in hospitals. Here we report control of the nanostructure dimension of the mille-feuille crystal plates in anatase columnar crystals as a function of the coating thickness. This nanoplate thickness is key to achieving the large aspect ratio of surface area to migration path length. TiO2 solid coatings were prepared by pulsed-pressure metalorganic chemical vapor deposition (pp-MOCVD) under the same deposition temperature and mass flux, with thickness ranging from 1.3–16 μm, by varying the number of precursor pulses. SEM and STEM were used to measure the mille-feuille plate width which is believed to be a key functional nano-dimension for photocatalytic activity. Competitive growth produces a larger columnar crystal diameter with thickness. The question is if the nano-dimension also increases with columnar crystal size. We report that the nano-dimension increases with the film thickness, ranging from 17–42 nm. The results of this study can be used to design a coating which has co-optimized thickness for durability and nano-dimension for enhanced photocatalytic properties.

High Stability of Dielectric Permittivity for Pb(Mg1/3Nb2/3)O3-Based Composite Ceramics Prepared by Coating Method

2011 ◽  
Vol 687 ◽  
pp. 450-456
Author(s):  
Jing Bo Zhao ◽  
Hong Liang Du ◽  
Shao Bo Qu ◽  
Hong Mei Zhang ◽  
Zhuo Xu
Keyword(s):  
Dielectric Permittivity ◽  
Curie Temperature ◽  
High Stability ◽  
Sintering Temperature ◽  
Temperature Stability ◽  
The Other ◽  
Composite Ceramics ◽  
Promising Candidate ◽  
Practical Applications ◽  
Coating Method

To improve the temperature stability of PMN(Pb(Mg1/3Nb2/3)O3)-based ceramics, PMN-based composite ceramics were prepared by co-sintering two kinds of ceramics with different curie temperature. One unit is MHT(0.82PMN (Pb (Mg1/3Nb2/3) O3) -0.18PT (PbTiO3) (the curie temperature Tm=74°C)), and the other unit is MLT (0.88PMN (Pb (Mg1/3Nb2/3) O3)-0.12BT (BaTiO3) (the curie temperature Tm=-50°C)). The effects of the sintering temperature and the ratio of high and low Tm units on dielectric temperature stability were studied. The results show that the temperature stability can be improved greatly by co-sintering and coating method. The results show that PMN(Pb(Mg1/3Nb2/3)O3)-based composite ceramics are promising candidate for practical applications.

scholarly journals Wafer-Scale Synthesis of Monolayer MoS2 and Their Field-Effect Transistors toward Practical Applications

2021 ◽  
Author(s):  
Yuchun Liu ◽  
Fuxing Gu
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Chemical Properties ◽  
Dimensional Structure ◽  
Two Dimensional ◽  
Monolayer Mos2 ◽  
Promising Candidate ◽  
Practical Applications ◽  
Integrated Electronics ◽  
Considerable Research

Molybdenum disulfide (MoS2) have attracted considerable research interest as a promising candidate for downscaling integrated electronics due to the special two-dimensional structure and unique physic-chemical properties. However, it is still...

scholarly journals Interface Engineering via Ti3C2Tx MXene Electrolyte Additive toward Dendrite-Free Zinc Deposition

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Chuang Sun ◽  
Cuiping Wu ◽  
Xingxing Gu ◽  
Chao Wang ◽  
Qinghong Wang
Keyword(s):  
Coulombic Efficiency ◽  
Low Cost ◽  
Nucleation And Growth ◽  
Promising Candidate ◽  
Zinc Deposition ◽  
Electrolyte Additive ◽  
Practical Applications ◽  
Zinc Metal ◽  
Electrolyte Interface ◽  
Cycling Performances

AbstractZinc metal batteries have been considered as a promising candidate for next-generation batteries due to their high safety and low cost. However, their practical applications are severely hampered by the poor cyclability that caused by the undesired dendrite growth of metallic Zn. Herein, Ti3C2Tx MXene was first used as electrolyte additive to facilitate the uniform Zn deposition by controlling the nucleation and growth process of Zn. Such MXene additives can not only be absorbed on Zn foil to induce uniform initial Zn deposition via providing abundant zincophilic-O groups and subsequently participate in the formation of robust solid-electrolyte interface film, but also accelerate ion transportation by reducing the Zn2+ concentration gradient at the electrode/electrolyte interface. Consequently, MXene-containing electrolyte realizes dendrite-free Zn plating/striping with high Coulombic efficiency (99.7%) and superior reversibility (stably up to 1180 cycles). When applied in full cell, the Zn-V2O5 cell also delivers significantly improved cycling performances. This work provides a facile yet effective method for developing reversible zinc metal batteries.

scholarly journals Advanced Hand Gesture Prediction Robust to Electrode Shift with an Arbitrary Angle

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1113 ◽  
Author(s):  
Zhenjin Xu ◽  
Linyong Shen ◽  
Jinwu Qian ◽  
Zhen Zhang
Keyword(s):  
Hand Gesture ◽  
Arbitrary Angle ◽  
Promising Candidate ◽  
Practical Applications ◽  
Signal Collection ◽  
Trained Classifier ◽  
Shift Detection ◽  
Peak Location ◽  
Bioelectric Signals ◽  
Insight Into

Recent advances in myoelectric controlled techniques have made the surface electromyogram (sEMG)-based sensing armband a promising candidate for acquiring bioelectric signals in a simple and convenient way. However, inevitable electrode shift as a non-negligible defect commonly causes a trained classifier requiring continuous recalibrations. In this study, a novel hand gesture prediction is firstly proposed; it is robust to electrode shift with arbitrary angle. Unlike real-time recognition which outputs target gestures only after the termination of hand motions, our proposed advanced prediction can provide the same results, even before the completion of signal collection. Moreover, by combining interpolated peak location and preset synchronous gesture, the developed simplified rapid electrode shift detection and correction at random rather than previous fixed angles are realized. Experimental results demonstrate that it is possible to achieve both electrode shift detection with high precision and gesture prediction with high accuracy. This study provides a new insight into electrode shift robustness which brings gesture prediction a step closer to practical applications.

scholarly journals A saccharide-based binder for efficient polysulfide regulations in Li-S batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yingyi Huang ◽  
Mahdokht Shaibani ◽  
Tanesh D. Gamot ◽  
Mingchao Wang ◽  
Petar Jovanović ◽  
...  
Keyword(s):  
Cycle Stability ◽  
Binder System ◽  
Sulfur Cathode ◽  
Capacity Retention ◽  
Practical Applications ◽  
Energy Storage Technology ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur ◽  
Reducing Properties

AbstractThe viability of lithium-sulfur batteries as an energy storage technology depends on unlocking long-term cycle stability. Most instability stems from the release and transport of polysulfides from the cathode, which causes mossy growth on the lithium anode, leading to continuous consumption of electrolyte. Therefore, development of a durable cathode with minimal polysulfide escape is critical. Here, we present a saccharide-based binder system that has a capacity for the regulation of polysulfides due to its reducing properties. Furthermore, the binder promotes the formation of viscoelastic filaments during casting which endows the sulfur cathode with a desirable web-like microstructure. Taken together this leads to 97% sulfur utilisation with a cycle life of 1000 cycles (9 months) and capacity retention (around 700 mAh g−1 after 1000 cycles). A pouch cell prototype with a specific energy of up to 206 Wh kg−1 is produced, demonstrating the promising potential for practical applications.

Molecular rectifier composed of DNA with high rectification ratio enabled by intercalation

2016 ◽  
Vol 8 (5) ◽  
pp. 484-490 ◽  
Author(s):  
Cunlan Guo ◽  
Kun Wang ◽  
Elinor Zerah-Harush ◽  
Joseph Hamill ◽  
Bin Wang ◽  
...  
Keyword(s):  
Rectification Ratio ◽  
Molecular Rectifier

Effect of Fluorine-Containing Additive on the Electrochemical Properties of Silicon Anode for Lithium-Ion Batteries

2019 ◽  
Vol 944 ◽  
pp. 699-704 ◽  
Author(s):  
Jing Wang ◽  
Xiao Hang Yang ◽  
Yue Feng Su ◽  
Shi Chen ◽  
Feng Wu
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Solid Electrolyte Interphase ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Silicon Anode ◽  
Cycle Stability ◽  
Promising Candidate ◽  
Sem Images ◽  
The Stability

Silicon anode is a promising candidate as an alternative to the conventional graphitic anode in lithium-ion batteries. In this work, silicon anode is modified by NH4F using a facile method in air. The concentration of NH4F on the electrochemical performance is systematically checked. The 5wt%NH4F-modified silicon anode exhibits enhanced cycle and rate performances, the first discharge specific capacity is 3958 mAh·g-1 with 86.45% as the coulombic efficiency at 0.4A·g-1. The capacity can maintain at 703.3 mAh·g-1 after 50 cycles, exhibiting a much better cycle stability than pristine silicon anode (329.9 mAh·g-1 after 50 cycles). SEM images confirm that NH4F can alleviate the volume expansion of silicon since LiF can be generated at the surface which is beneficial to the stability of solid-electrolyte interphase (SEI).

SUBSTRATE MODULATED GRAPHENE QUANTUM DOTS

2012 ◽  
Vol 26 (25) ◽  
pp. 1250162
Author(s):  
QIONG MA ◽  
TAO TU ◽  
LI WANG ◽  
HAI-OU LI ◽  
ZHI-RONG LIN ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Spectrum ◽  
Quantum Dot ◽  
Transport Properties ◽  
Coupling Strength ◽  
Graphene Quantum Dots ◽  
Two Dimensional ◽  
Promising Candidate ◽  
Gapped Graphene ◽  
Practical Applications

We propose a method to use gapped graphene as barriers to confine electrons in gapless graphene and form a good quantum dot, which can be realized on an oxygen-terminated SiO 2 substrate partly hydrogen-passivated. In particular, we use deposited ferromagnetic insulators as contacts which give rise to spin-dependent energy spectrum and transport properties. Furthermore, we upgrade this method to form two-dimensional quantum dot arrays, whose coupling strength between neighboring dots can be uniquely anisotropic. Compared to complexity of other approaches to form quantum dot in graphene, the setup suggested here is a promising candidate for practical applications.

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