scholarly journals First exfoliated Ru–Ru–Au organometallic polymer with layered structure

2020 ◽  
Vol 56 (66) ◽  
pp. 9441-9444
Author(s):  
Franco Scalambra ◽  
Benjamin Sierra-Martin ◽  
Manuel Serrano-Ruiz ◽  
Antonio Fernandez-Barbero ◽  
Antonio Romerosa
Keyword(s):  
Layered Structure ◽  
Large Scale ◽  
Organometallic Polymer ◽  
Heterometallic Polymer

A novel Ru–Ru–Au 3D heterometallic polymer self-assembles in single layers with large scale hexagonal conformation, as well as forming 3D stacks of polymer sandwiches.

Large-scale synthesis of organometallic polymer flowers with ultrathin petals for hydrogen peroxide sensing

2015 ◽  
Vol 6 (24) ◽  
pp. 4447-4454 ◽  
Author(s):  
Guodong Liang ◽  
Xiaodong Li ◽  
Suping Bao ◽  
Haiyang Gao ◽  
Fangming Zhu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Large Scale ◽  
Organometallic Polymer ◽  
Efficient Approach ◽  
Large Scale Synthesis

A facile and efficient approach for large-scale synthesis of organometallic polymer flowers with ultrathin petals has been developed.

Hydrogen-bond structure and anharmonicity in croconic acid

2014 ◽  
Vol 16 (47) ◽  
pp. 26234-26239 ◽  
Author(s):  
Sanghamitra Mukhopadhyay ◽  
Matthias Gutmann ◽  
Felix Fernandez-Alonso
Keyword(s):  
Hydrogen Bond ◽  
Layered Structure ◽  
Large Scale ◽  
Md Simulations

Layered structure of croconic acid and radial distributions from large scale MD simulations, highlighting a distinct broadening even at 300 K where the material remains ferroelectric.

Inorganic nanotubes and fullerene-like nanoparticles

2006 ◽  
Vol 21 (11) ◽  
pp. 2726-2743 ◽  
Author(s):  
R. Tenne
Keyword(s):  
Layered Structure ◽  
Large Scale ◽  
Rechargeable Batteries ◽  
Layered Compounds ◽  
Inorganic Nanotubes ◽  
Metal Dichalcogenides ◽  
Substantial Progress ◽  
Novel Applications ◽  
Defense Medical

We have proposed in 1992 that nanoparticles of layered compounds will be unstable against folding and close into fullerene-like structures and nanotubes (IF). Nanotubes and fullerene-like structures were prepared from numerous compounds with layered and recently also non-layered structure by various groups. Much progress has been achieved in the synthesis of inorganic nanotubes and fullerene-like nanoparticles of WS2 and MoS2 and many other metal dichalcogenides over the last few years. Substantial progress has been accomplished in the use of such nanoparticles for tribological applications and lately for impact resilient nanocomposites. These tests indicated that IF-MoS2 and IF-WS2 are heading for large scale applications in the automotive, machining, aerospace, electronics, defense, medical and numerous other kinds of industries. A few products based on these nanoparticles have been recently commercialized by “ApNano Materials, Inc”. Novel applications of inorganic nanotubes and fullerene-like nanoparticles in the fields of catalysis; microelectronics; Li rechargeable batteries; medical and opto-electronics will be discussed.

Top-Down Processing Towards Ångström-Thin Two-Dimensional (2D) Elemental Metals

2020 ◽  
Author(s):  
Md Rubayat-E Tanjil ◽  
Stanley Agbakansi ◽  
Keegan Phayden Suero ◽  
Ossie Douglas ◽  
Yunjo Jeong ◽  
...  
Keyword(s):  
Layered Structure ◽  
Large Scale ◽  
Hexagonal Boron Nitride ◽  
2D Materials ◽  
Van Der Waals ◽  
Emergent Properties ◽  
Two Dimensional ◽  
Metallic Materials ◽  
Fabrication Technique ◽  
Top Down

Abstract Two-dimensional (2D) materials have recently garnered significant interest due to their novel and emergent properties. A plethora of 2D materials have been discovered and intensively studied, such as graphene, hexagonal boron nitride, transitionmetal dichalcogenides (TMDCs), and other metallic compound MXenes (nitrides, phosphides, and hydroxides), as well as elemental 2D materials (borophene, germanene, phosphorene, silicene, etc.). Considering the widespread interest in conventional van der Waals 2D materials, two-dimensional metallic nanosheets (2DMNS), a recent addition to the 2D materials family, have exhibited diverse potential spanning optics, electronics, magnetics, catalysis, etc. However, the close-packed, non-layered structure and non-directional, isotropic bonding of metallic materials make it difficult to access metals in their 2D forms, unlike 2D van der Waals materials, which have intrinsically layered structure (strong in-plane bonding in addition to the weak interlayer interaction). Until now, conventional top-down and bottom-up synthesis schemes of these 2DMNS have encountered various limitations such as precursor availability, substrate incompatibility, difficulty of control over thickness and stoichiometry, limited thermal budget, etc. To overcome these manufacturing limitations of 2DMNS, here we report a facile, rapid, large-scale, and cost-effective fabrication technique of nanometer-scale copper (Cu) 2DMNS via iterative rolling, folding, and calendering (RFC) that is readily generalizable to other conventional elemental metallic materials. Overall, we successfully show a scalable fabrication technique of 2DMNS.

Synthesis of Large-Area Monolayer and Few-Layer MoSe2 Continuous Films by Chemical Vapor Deposition without Hydrogen assisted and Formation Mechanism

Nanoscale ◽  
2021 ◽  
Author(s):  
Hui Yan ◽  
Tong Yu ◽  
Heng Li ◽  
Zhuocheng Li ◽  
Haitao Tang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Chemical Vapor Deposition ◽  
Layered Structure ◽  
Vapor Deposition ◽  
Large Scale ◽  
Chemical Vapor ◽  
Controlled Synthesis ◽  
Two Dimensional ◽  
Large Area ◽  
High Quality

Two dimensional (2D) MoSe2 with layered structure has attracted extensive research due to its excellent electronic and optical properties. Controlled synthesis of large-scale and high-quality MoSe2 is highly desirable but...

Some comments about observations and image processing of comet 29P/Schwassmann-Wachmann 1

1999 ◽  
Vol 173 ◽  
pp. 243-248
Author(s):  
D. Kubáček ◽  
A. Galád ◽  
A. Pravda
Keyword(s):  
Image Processing ◽  
Large Scale ◽  
Harvard College ◽  
Oak Ridge ◽  
Large Scale Structures ◽  
Short Period Comet ◽  
Short Period ◽  
Scale Structures ◽  
Harvard College Observatory ◽  
Period Comet

AbstractUnusual short-period comet 29P/Schwassmann-Wachmann 1 inspired many observers to explain its unpredictable outbursts. In this paper large scale structures and features from the inner part of the coma in time periods around outbursts are studied. CCD images were taken at Whipple Observatory, Mt. Hopkins, in 1989 and at Astronomical Observatory, Modra, from 1995 to 1998. Photographic plates of the comet were taken at Harvard College Observatory, Oak Ridge, from 1974 to 1982. The latter were digitized at first to apply the same techniques of image processing for optimizing the visibility of features in the coma during outbursts. Outbursts and coma structures show various shapes.

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

Large-scale Motion of Solar Filaments

2000 ◽  
Vol 179 ◽  
pp. 205-208
Author(s):  
Pavel Ambrož ◽  
Alfred Schroll
Keyword(s):  
Magnetic Flux ◽  
Proper Motion ◽  
Time Scale ◽  
Large Scale ◽  
Accuracy Of Measurements ◽  
Solar Filaments ◽  
General Movement ◽  
Scale Motion ◽  
Velocity Scatter

AbstractPrecise measurements of heliographic position of solar filaments were used for determination of the proper motion of solar filaments on the time-scale of days. The filaments have a tendency to make a shaking or waving of the external structure and to make a general movement of whole filament body, coinciding with the transport of the magnetic flux in the photosphere. The velocity scatter of individual measured points is about one order higher than the accuracy of measurements.

Some applications of electron beam microanalysis techniques in VLSI process evaluation

1983 ◽  
Vol 41 ◽  
pp. 160-161
Author(s):  
Simon Thomas
Keyword(s):  
Integrated Circuits ◽  
Process Evaluation ◽  
Large Scale ◽  
Technology Development ◽  
Analytical Techniques ◽  
Successful Implementation ◽  
Analysis Of Failures ◽  
Characterization Of Materials ◽  
Circuits Vlsi

Trends in the technology development of very large scale integrated circuits (VLSI) have been in the direction of higher density of components with smaller dimensions. The scaling down of device dimensions has been not only laterally but also in depth. Such efforts in miniaturization bring with them new developments in materials and processing. Successful implementation of these efforts is, to a large extent, dependent on the proper understanding of the material properties, process technologies and reliability issues, through adequate analytical studies. The analytical instrumentation technology has, fortunately, kept pace with the basic requirements of devices with lateral dimensions in the micron/ submicron range and depths of the order of nonometers. Often, newer analytical techniques have emerged or the more conventional techniques have been adapted to meet the more stringent requirements. As such, a variety of analytical techniques are available today to aid an analyst in the efforts of VLSI process evaluation. Generally such analytical efforts are divided into the characterization of materials, evaluation of processing steps and the analysis of failures.

Electron microscopy study of reactively sputter-deposited Ti/N films on silicon

1992 ◽  
Vol 50 (2) ◽  
pp. 1362-1363
Author(s):  
V. C. Kannan ◽  
A. K. Singh ◽  
R. B. Irwin ◽  
S. Chittipeddi ◽  
F. D. Nkansah ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Large Scale ◽  
Hexagonal Phase ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Process Conditions ◽  
Tin Films ◽  
Wide Range ◽  
Fcc Phase ◽  
Circuits Vlsi

Titanium nitride (TiN) films have historically been used as diffusion barrier between silicon and aluminum, as an adhesion layer for tungsten deposition and as an interconnect material etc. Recently, the role of TiN films as contact barriers in very large scale silicon integrated circuits (VLSI) has been extensively studied. TiN films have resistivities on the order of 20μ Ω-cm which is much lower than that of titanium (nearly 66μ Ω-cm). Deposited TiN films show resistivities which vary from 20 to 100μ Ω-cm depending upon the type of deposition and process conditions. TiNx is known to have a NaCl type crystal structure for a wide range of compositions. Change in color from metallic luster to gold reflects the stabilization of the TiNx (FCC) phase over the close packed Ti(N) hexagonal phase. It was found that TiN (1:1) ideal composition with the FCC (NaCl-type) structure gives the best electrical property.

Sign in / Sign up

Export Citation Format

Share Document