Atomic Layer Structure of Vanadium Oxide Nanotubes Grown on Nanourchin Structures

2007 ◽  
Vol 10 (4) ◽  
pp. A111 ◽  
Author(s):  
C. O’Dwyer ◽  
V. Lavayen ◽  
S. B. Newcomb ◽  
E. Benavente ◽  
M. A. Santa Ana ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Layer Structure ◽  
Atomic Layer ◽  
Vanadium Oxide Nanotubes

scholarly journals Intercalated architecture of MA2Z4 family layered van der Waals materials with emerging topological, magnetic and superconducting properties

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Lei Wang ◽  
Yongpeng Shi ◽  
Mingfeng Liu ◽  
Ao Zhang ◽  
Yi-Lun Hong ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Density Functional ◽  
Layer Structure ◽  
Atomic Layer ◽  
Type I ◽  
Hybrid Functional ◽  
Functional Theory ◽  
Valence Electrons ◽  
Nonmagnetic Metals ◽  
Standard Density

AbstractThe search for new two-dimensional monolayers with diverse electronic properties has attracted growing interest in recent years. Here, we present an approach to construct MA2Z4 monolayers with a septuple-atomic-layer structure, that is, intercalating a MoS2-type monolayer MZ2 into an InSe-type monolayer A2Z2. We illustrate this unique strategy by means of first-principles calculations, which not only reproduce the structures of MoSi2N4 and MnBi2Te4 that were already experimentally synthesized, but also predict 72 compounds that are thermodynamically and dynamically stable. Such an intercalated architecture significantly reconstructs the band structures of the constituents MZ2 and A2Z2, leading to diverse electronic properties for MA2Z4, which can be classified according to the total number of valence electrons. The systems with 32 and 34 valence electrons are mostly semiconductors. Whereas, those with 33 valence electrons can be nonmagnetic metals or ferromagnetic semiconductors. In particular, we find that, among the predicted compounds, (Ca,Sr)Ga2Te4 are topologically nontrivial by both the standard density functional theory and hybrid functional calculations. While VSi2P4 is a ferromagnetic semiconductor and TaSi2N4 is a type-I Ising superconductor. Moreover, WSi2P4 is a direct gap semiconductor with peculiar spin-valley properties, which are robust against interlayer interactions. Our study thus provides an effective way of designing septuple-atomic-layer MA2Z4 with unusual electronic properties to draw immediate experimental interest.

Synthesis of Novel Vanadium Oxide Nanotubes and Nanofibers

2002 ◽  
Vol 740 ◽  
Author(s):  
Samuel T. Lutta ◽  
Hong Dong ◽  
Peter Y. Zavalij ◽  
M. Stanley Whittingham
Keyword(s):  
Thermal Analysis ◽  
Vanadium Oxide ◽  
Electrochemical Behavior ◽  
Redox Reactions ◽  
Sol Gel ◽  
Vanadium Oxides ◽  
Organic Polymer ◽  
Fibrous Morphology ◽  
Surfactant Templates ◽  
Vanadium Oxide Nanotubes

ABSTRACTWe are exploring the synthesis and properties of structured vanadium oxides mainly nanotubes and nanorods. Nanotubes initially formed with surfactant templates have been readily exchanged with simple cations without change of the basal-plane structure. These compounds contain d-like vanadium oxide layers with the vanadium in VO6 octahedra. This structure is particularly suitable for redox reactions. In this paper we report on synthesis of vanadium oxide, (NH4)xV2O5-d·nH2O rods using organic polymer as template. This compound has been synthesized by sol-gel reaction and subsequent hydrothermal treatment. TGA, SEM, XRD and FTIR were used to characterize this compound. Thermal analysis of this compound shows that the fibrous morphology is maintained when it is heated in nitrogen and oxygen above 300 °C. However, in both cases the size of the fibers decreases. Performance of this compound as cathode material in secondary electrolyte has been investigated using LiPF6 as electrolyte. A capacity of 140 mAh/g was obtained which remained fairly constant with up to at least 10 cycles. We also investigated electrochemical behavior of thermal products.

Structural, optical, and electronic properties of vanadium oxide nanotubes

2005 ◽  
Vol 72 (11) ◽  
Author(s):  
X. Liu ◽  
C. Täschner ◽  
A. Leonhardt ◽  
M. H. Rümmeli ◽  
T. Pichler ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Electronic Properties ◽  
Optical And Electronic Properties ◽  
Vanadium Oxide Nanotubes

ChemInform Abstract: Morphology and Topochemical Reactions of Novel Vanadium Oxide Nanotubes.

ChemInform ◽  
2010 ◽  
Vol 30 (51) ◽  
pp. no-no ◽  
Author(s):  
F. Krumeich ◽  
H.-J. Muhr ◽  
M. Niederberger ◽  
F Bieri ◽  
B. Schnyder ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Topochemical Reactions ◽  
Vanadium Oxide Nanotubes

The effect of surface morphology on the response of Fe2O3-loaded vanadium oxide nanotubes gas sensor

2011 ◽  
Vol 257 (16) ◽  
pp. 7071-7075 ◽  
Author(s):  
Wei Jin ◽  
Wen Chen ◽  
Yue Li ◽  
Chunxia Zhao ◽  
Ying Dai
Keyword(s):  
Surface Morphology ◽  
Vanadium Oxide ◽  
Gas Sensor ◽  
Vanadium Oxide Nanotubes ◽  
Effect Of Surface

Lithium Insertion into Vanadium Oxide Nanotubes:  Electrochemical and Structural Aspects

2006 ◽  
Vol 18 (2) ◽  
pp. 495-503 ◽  
Author(s):  
Sara Nordlinder ◽  
Leif Nyholm ◽  
Torbjörn Gustafsson ◽  
Kristina Edström
Keyword(s):  
Vanadium Oxide ◽  
Lithium Insertion ◽  
Vanadium Oxide Nanotubes ◽  
Structural Aspects

A Novel Approach to Vanadium Oxide Nanotubes by Oxidation of V4+ species

2008 ◽  
Vol 112 (50) ◽  
pp. 19930-19933 ◽  
Author(s):  
L. Irais Vera-Robles ◽  
Antonio Campero
Keyword(s):  
Vanadium Oxide ◽  
Novel Approach ◽  
Vanadium Oxide Nanotubes

Graphene/vanadium oxide nanotubes composite as electrode material for electrochemical capacitors

2013 ◽  
Vol 421 ◽  
pp. 77-82 ◽  
Author(s):  
Meimei Fu ◽  
Chongyong Ge ◽  
Zhaohui Hou ◽  
Jianguo Cao ◽  
Binhong He ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Electrode Material ◽  
Electrochemical Capacitors ◽  
Vanadium Oxide Nanotubes
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