scholarly journals A Novel Approach to the Layer-Number-Controlled and Grain-Size-Controlled Growth of High Quality Graphene for Nanoelectronics

2018 ◽  
Vol 1 (4) ◽  
pp. 1502-1512 ◽  
Author(s):  
Tej B. Limbu ◽  
Jean C. Hernández ◽  
Frank Mendoza ◽  
Rajesh K. Katiyar ◽  
Joshua James Razink ◽  
...  
Keyword(s):  
Grain Size ◽  
Controlled Growth ◽  
High Quality ◽  
Layer Number ◽  
Novel Approach ◽  
Size Controlled

Automatic Extraction of Semantic Relations from Wikipedia

2015 ◽  
Vol 24 (02) ◽  
pp. 1540010 ◽  
Author(s):  
Patrick Arnold ◽  
Erhard Rahm
Keyword(s):  
Finite State Machines ◽  
Background Knowledge ◽  
Semantic Relations ◽  
Automatic Extraction ◽  
State Machines ◽  
High Quality ◽  
Novel Approach ◽  
Finite State ◽  
Semantic Ontology

We introduce a novel approach to extract semantic relations (e.g., is-a and part-of relations) from Wikipedia articles. These relations are used to build up a large and up-to-date thesaurus providing background knowledge for tasks such as determining semantic ontology mappings. Our automatic approach uses a comprehensive set of semantic patterns, finite state machines and NLP techniques to extract millions of relations between concepts. An evaluation for different domains shows the high quality and effectiveness of the proposed approach. We also illustrate the value of the newly found relations for improving existing ontology mappings.

A large grain size perovskite thin film with a dense structure for planar heterojunction solar cells via spray deposition under ambient conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (74) ◽  
pp. 60562-60569 ◽  
Author(s):  
Zhurong Liang ◽  
Shaohong Zhang ◽  
Xueqing Xu ◽  
Nan Wang ◽  
Junxia Wang ◽  
...  
Keyword(s):  
Grain Size ◽  
Surface Coverage ◽  
Spray Deposition ◽  
Deposition Process ◽  
Ambient Conditions ◽  
High Quality ◽  
Dense Structure ◽  
Heterojunction Solar Cells ◽  
Planar Heterojunction Solar Cells ◽  
Planar Heterojunction

A facile spray deposition process was developed to prepare high-quality perovskite films with full surface coverage and large grain size.

Refinement of Size Distributions for Primary Crystallizations

1997 ◽  
Vol 481 ◽  
Author(s):  
E. Pineda ◽  
T. Pradell ◽  
D. Crespo ◽  
N. Clavaguera ◽  
J. ZHU ◽  
...  
Keyword(s):  
Grain Size ◽  
Metastable Phase ◽  
Primary Crystallization ◽  
Controlled Growth ◽  
Diffusion Controlled ◽  
Average Grain Size ◽  
Soft Impingement ◽  
Single Grain ◽  
Kinetics Of ◽  
And Diffusion

ABSTRACTThe microstructure developed in primary crystallizations is studied under realistic conditions. The primary crystallization of an amorphous alloy is modeled by considering the thermodynamics of a metastable phase transition and the kinetics of nucleation and crystal growth under isothermal annealing. A realistic growth rate, including an interface controlled growth at the beginning of the growth of each single grain and diffusion controlled growth process with soft impingement afterwards is considered. The reduction in the nucleation rate due to the compositional change in the remaining amorphous matrix is also taken into account. The microstructures developed during the transformation are obtained by using the Populational KJMA method, from the above thermodynamic and kinetic factors. Experimental data of transformed fraction, grain density, average grain size, grain size distribution and other related parameters obtained from annealed metallic glasses are modeled.

scholarly journals Object Metamorphosis Based on Generalized Morphology Transformation

2001 ◽  
Vol 5 (1) ◽  
pp. 92-103
Author(s):  
Hua Li ◽  
Wenyu Liu ◽  
Guangxi Zhu ◽  
Yaoting Zhu
Keyword(s):  
Computer Animation ◽  
Industrial Design ◽  
Simple Computation ◽  
Shape Transformation ◽  
High Quality ◽  
Growth Simulation ◽  
Novel Approach ◽  
Polyhedral Objects ◽  
2D And 3D

A metamorphosis or a morphing is the process of continuously transforming one object into another, and are popular in computer animation, industrial design, and growth simulation. In this paper, a novel approach is presented for computing continuous shape transformation between polyhedral objects in this paper. Metamorphosis can be achieved by decomposing two objects into sets of individual convex sub-objects respectively and constructing the mapping between two sets, this method can solve the metamorphosis problem of two non-homotopic objects (including concave objects and holey objects). The results of object metamorphosis are discussed in this paper. The experiments show that this method can generate natural, high quality metamorphosis results with simple computation. This method can also be used in font composition and interpolation between two keyframes in 2D and 3D computer animation automatically.

Impact of grain size on the optoelectronic performance of 2D Ruddlesden–Popper perovskite-based photodetectors

2021 ◽  
Vol 9 (1) ◽  
pp. 110-116
Author(s):  
Bohee Hwang ◽  
Youngjun Park ◽  
Jang-Sik Lee
Keyword(s):  
Grain Size ◽  
High Performance ◽  
Solvent Engineering ◽  
Size Controlled

This paper presents the synthesis of grain size-controlled 2D perovskite films for high-performance photodetectors by combining solvent engineering and hot casting.

Preparation of single-crystal metal substrates for the growth of high-quality two-dimensional materials

2021 ◽  
Vol 8 (1) ◽  
pp. 182-200
Author(s):  
Yanglizhi Li ◽  
Luzhao Sun ◽  
Haiyang Liu ◽  
Yuechen Wang ◽  
Zhongfan Liu
Keyword(s):  
Single Crystal ◽  
2D Materials ◽  
Controlled Growth ◽  
Two Dimensional ◽  
High Quality ◽  
Metal Substrates ◽  
Recent Advances ◽  
Two Dimensional Materials

Recent advances on preparing single-crystal metals and their crucial roles in controlled growth of high-quality 2D materials are reviewed.

Controlled growth of large-area and high-quality molybdenum disulfide

2017 ◽  
Vol 56 (11) ◽  
pp. 110302
Author(s):  
Ja-Yeon Kim ◽  
Doo-Hyung Kim ◽  
Min-Ki Kwon
Keyword(s):  
Molybdenum Disulfide ◽  
Controlled Growth ◽  
Large Area ◽  
High Quality

Effect of pH and Concentration of Ca2+ on Spherical Calcium Carbonate Crystallization by Continuous CO2 Gas Bubbling into Phosphogypsum Leaching Solution

2015 ◽  
Vol 814 ◽  
pp. 552-558
Author(s):  
Ya Qing Liang ◽  
Hong Juan Sun ◽  
Tong Jiang Peng
Keyword(s):  
Grain Size ◽  
Calcium Carbonate ◽  
Particle Dispersion ◽  
Ion Concentration ◽  
High Grade ◽  
Solution Ph ◽  
Salt Leaching ◽  
Novel Approach ◽  
Different Temperatures ◽  
Leaching Solution

Spherical calcium carbonate (CaCO3) is a potential component in many industrial fields such as high-grade papermaking, high-grade painting, environment, and pesticide. This paper describes a novel approach to synthesize spherical calcium carbonate (CaCO3) particles via passing CO2 bubbles into phosphogypsum salt leaching solution (CaSO4) in the presence of ammonia (NH3) at different temperatures. The influence of the initial solution pH and concentration of calcium ions on the polymorph and morphology of CaCO3 was studied. The physical characteristics of the precipitate were evaluated using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that compared with different calcium sources the phase and morphology of CaCO3 synthesized by phosphogysum leaching solution had some regularity. The grain size of spherical CaCO3 became bigger, surface became smoother, and particle dispersion became better with the increase of calcium ion concentration. The content of vaterite increased and particle grain size changed a little with the increase of pH. The research results had important environmental significance for phosphogysum resource utilization and CO2 fixation.

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