From One-Dimensional Linear Chain to Two-Dimensional Layered Chalcogenides XBi4S7(X = Mn, Fe): Syntheses, Crystal and Electronic Structures, and Physical Properties

2013 ◽  
Vol 13 (9) ◽  
pp. 4118-4124 ◽  
Author(s):  
Zhong-Zhen Luo ◽  
Chen-Sheng Lin ◽  
Wen-Dan Cheng ◽  
Wei-Long Zhang ◽  
Yuan-Bing Li ◽  
...  
Keyword(s):  
Physical Properties ◽  
Electronic Structures ◽  
Linear Chain ◽  
Two Dimensional ◽  
Layered Chalcogenides ◽  
One Dimensional

scholarly journals Synthesis and Application of One-Dimensional La(OH)3Nanostructures: An Overview

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Xiang Xiao ◽  
Yu Huang ◽  
Fan Dong
Keyword(s):  
Physical Properties ◽  
Electronic Structures ◽  
Growth Mechanisms ◽  
One Dimensional ◽  
New Directions ◽  
Potential Applications ◽  
Transition Modes ◽  
Semiconductor Nanomaterials ◽  
Comprehensive Introduction ◽  
Solvothermal Methods

One-dimensional (1D) semiconductor nanomaterials are of particular importance owing to their unique properties and potential applications. This review attempts to provide a comprehensive introduction of 1D La(OH)3nanostructures including nanowires, nanoneedles, nanobelts, and nanorods. Firstly, various strategies developed to fabricate the 1D La(OH)3nanostructures are discussed, such as precipitation and composite-hydroxide-mediated, hydrothermal, and solvothermal methods, accompanying the description of the corresponding growth mechanisms. Then, the unique properties such as novel physical properties of 1D La(OH)3nanostructures resulting from their unique electronic structures and numerous transition modes involving the 4f shells of these ions are represented in detail. Also, the wide applications in photocatalyst, capacitors, and photoluminescence based on the unique properties are discussed. Finally, the paper ends with a summary and some perspectives on the challenges and new directions in this emerging area.

scholarly journals Blue emission at atomically sharp 1D heterojunctions between graphene and h-BN

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Gwangwoo Kim ◽  
Kyung Yeol Ma ◽  
Minsu Park ◽  
Minsu Kim ◽  
Jonghyuk Jeon ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Boron Nitride ◽  
Physical Properties ◽  
Hexagonal Boron Nitride ◽  
Graphene Quantum Dots ◽  
Blue Emission ◽  
Electronic States ◽  
Optoelectronic Property ◽  
Two Dimensional ◽  
One Dimensional

Abstract Atomically sharp heterojunctions in lateral two-dimensional heterostructures can provide the narrowest one-dimensional functionalities driven by unusual interfacial electronic states. For instance, the highly controlled growth of patchworks of graphene and hexagonal boron nitride (h-BN) would be a potential platform to explore unknown electronic, thermal, spin or optoelectronic property. However, to date, the possible emergence of physical properties and functionalities monitored by the interfaces between metallic graphene and insulating h-BN remains largely unexplored. Here, we demonstrate a blue emitting atomic-resolved heterojunction between graphene and h-BN. Such emission is tentatively attributed to localized energy states formed at the disordered boundaries of h-BN and graphene. The weak blue emission at the heterojunctions in simple in-plane heterostructures of h-BN and graphene can be enhanced by increasing the density of the interface in graphene quantum dots array embedded in the h-BN monolayer. This work suggests that the narrowest, atomically resolved heterojunctions of in-plane two-dimensional heterostructures provides a future playground for optoelectronics.

Symmetrically 4,6-disubstituted 2-aminopyrimidines and 2-amino-5-nitrosopyrimidines: interplay of molecular, molecular–electronic and supramolecular structures

2004 ◽  
Vol 60 (1) ◽  
pp. 76-89 ◽  
Author(s):  
Antonio Quesada ◽  
Antonio Marchal ◽  
Manuel Melguizo ◽  
John N. Low ◽  
Christopher Glidewell
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Electronic Structures ◽  
Three Dimensional ◽  
Supramolecular Structures ◽  
Nitroso Compounds ◽  
Stacking Interactions ◽  
Two Dimensional ◽  
Molecular Electronic ◽  
One Dimensional

The structures of six symmetrically 4,6-disubstituted 2-aminopyrimidines, four of them containing a 5-nitroso substituent, have been determined. The nitroso compounds, in particular, exhibit polarized molecular–electronic structures leading to extensive charge-assisted hydrogen bonding. The intermolecular interactions observed include hard hydrogen bonds of N—H...N and N—H...O types together with O—H...O and O—H...N types in 2-amino-4,6-bis(2-hydroxyethylamino)-5-nitrosopyrimidine; soft hydrogen bonds of the C—H...O type in both 2-amino-4,6-bis(morpholino)-5-nitrosopyrimidine (3) and 2-amino-4,6-bis(benzylamino)-5-nitrosopyrimidine (4), and of the C—H...π(arene) type in both 2-amino-4,6-bis(piperidino)pyrimidine (1) and 2-amino-5-nitroso-4,6-bis(3-pyridylmethoxy)pyrimidine (5); and aromatic π...π stacking interactions in 2-amino-5-nitroso-4,6-bis(3-pyridylmethoxy)pyrimidine. The supramolecular structures formed by the hard hydrogen bonds are finite, zero-dimensional in (1), one-dimensional in 2-amino-4,6-bis(3-pyridylmethoxy)pyrimidine (2), two-dimensional in both (3) and (4), and three-dimensional in both (5) and 2-amino-4,6-bis(2-hydroxyethylamino)-5-nitrosopyrimidine.

scholarly journals MAGNETISM IN GRAPHENE SYSTEMS

NANO ◽  
2008 ◽  
Vol 03 (06) ◽  
pp. 433-442 ◽  
Author(s):  
ERJUN KAN ◽  
ZHENYU LI ◽  
JINLONG YANG
Keyword(s):  
Electronic Structures ◽  
Materials Science ◽  
Graphene Nanoribbons ◽  
Localized States ◽  
Theoretical Research ◽  
Two Dimensional ◽  
Spin Filter ◽  
Comprehensive Review ◽  
One Dimensional ◽  
Half Metal

Graphene has attracted great interest in materials science, owing to its novel electronic structures. Recently, magnetism discovered in graphene-based systems has opened up the possibility of their spintronics application. This paper provides a comprehensive review of the magnetic behaviors and electronic structures of graphene systems, including two-dimensional graphene, one-dimensional graphene nanoribbons, and zero-dimensional graphene nanoclusters. Theoretical research suggests that such metal-free magnetism mainly comes from the localized states or edges states. By applying an external electric field, or by chemical modification, we can turn the zigzag nanoribbon systems into half metal, thus obtaining a perfect spin filter.

Synthons and design in metal phosphates and oxalates with open architectures

2001 ◽  
Vol 57 (1) ◽  
pp. 1-12 ◽  
Author(s):  
C. N. R. Rao ◽  
Srinivasan Natarajan ◽  
Amitava Choudhury ◽  
S. Neeraj ◽  
R. Vaidhyanathan
Keyword(s):  
Linear Chain ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Ladder Structure ◽  
One Dimensional ◽  
Metal Phosphates ◽  
Open Framework ◽  
Framework Materials ◽  
Layer Structures ◽  
The One

We briefly describe the structures of open-framework metal phosphates with different dimensionalities, such as the one-dimensional linear-chain and ladder structures, two-dimensional layer structures and three-dimensional structures with channels. We demonstrate the role of the zero-dimensional four-membered ring monomer and of the one-dimensional ladder structure as the starting building units or synthons involved in the formation of the complex architectures. Thus, we show how the one-dimensional ladder structure transforms to two- and three-dimensional structures under mild conditions. The two-dimensional layer structures also transform to three-dimensional structures, while the zero-dimensional monomer transforms to layered and three-dimensional structures under ordinary reaction conditions. These transformations provide an insight into the possible pathways involved in the building up of the complex structures of metal phosphates. The isolation of amine phosphates during the hydrothermal synthesis of metal phosphates and also the facile reactions between amine phosphates and metal ions to yield a variety of open-framework materials have thrown light on the mechanism of formation and design of these structures. The existence of a hierarchy of open-framework metal oxalates and their ready formation by employing amine oxalates as intermediates provides additional support to the observations made earlier with regard to the phosphates.

catena-Poly[[aquachlorodimethylformamidecopper(II)]-μ-chloro]

2006 ◽  
Vol 62 (5) ◽  
pp. m962-m964
Author(s):  
Qi-Wei Zhang ◽  
Yi-Hang Wen ◽  
Yun-Long Feng
Keyword(s):  
Crystal Structure ◽  
Linear Chain ◽  
Chain Structure ◽  
Title Complex ◽  
Two Dimensional ◽  
One Dimensional ◽  
Pyramidal Geometry ◽  
Dimensional Network ◽  
Square Pyramidal Geometry ◽  
Linear Chain Structure

In the title complex, [CuCl2(C3H7NO)(H2O)] n , each CuII atom is in a Cl3O2 five-coordinate environment with a slightly distorted square-pyramidal geometry. Cu atoms are linked by μ2-Cl ions, resulting in a one-dimensional linear chain structure. In the crystal structure, intermolecular O—H...Cl hydrogen bonds link adjacent chains to form a two-dimensional network.

scholarly journals Decoding the conductance of disordered nanostructures: a quantum inverse problem

2021 ◽  
Author(s):  
Shardul Mukim ◽  
J. O’Brien ◽  
Maryam Abarashi ◽  
Mauro S Ferreira ◽  
Claudia Gomes da Rocha
Keyword(s):  
Electronic Structures ◽  
Graphene Nanoribbons ◽  
Hexagonal Boron Nitride ◽  
Linear Chain ◽  
Nanoscale Device ◽  
One Dimensional ◽  
Conductance Fluctuations ◽  
Conductance Spectrum ◽  
Nanoscale Sensing ◽  
Delta Functions

Abstract Obtaining conductance spectra for a concentration of disordered impurities distributed over a nanoscale device with sensing capabilities is a well-defined problem. However, to do this inversely, i.e., extracting information about the scatters from the conductance spectrum alone, is not an easy task. In the presence of impurities, even advanced techniques of inversion can become particularly challenging. This article extends the applicability of a methodology we proposed capable of extracting composition information about a nanoscale sensing device using the conductance spectrum. The inversion tool decodes the conductance spectrum to yield the concentration and nature of the disorders responsible for conductance fluctuations in the spectra. We present the method for simple one-dimensional systems like an electron gas with randomly distributed delta functions and a linear chain of atoms. We prove the generality and robustness of the method using materials with complex electronic structures like hexagonal boron nitride, graphene nanoribbons, and carbon nanotubes. We also go on to probe distribution of disorders on the sublattice structure of the materials using the proposed inversion tool.

A one-dimensional self-gravitating stellar gas

1966 ◽  
Vol 25 ◽  
pp. 46-48 ◽  
Author(s):  
M. Lecar
Keyword(s):  
Gravitational Field ◽  
Phase Space ◽  
Motion Picture ◽  
Space Distribution ◽  
Two Dimensional ◽  
One Dimensional ◽  
Phase Space Distribution ◽  
Dimensional Phase Space ◽  
The Mean

“Dynamical mixing”, i.e. relaxation of a stellar phase space distribution through interaction with the mean gravitational field, is numerically investigated for a one-dimensional self-gravitating stellar gas. Qualitative results are presented in the form of a motion picture of the flow of phase points (representing homogeneous slabs of stars) in two-dimensional phase space.

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