Browsing Materials Science & Technology by Title
Now showing items 264-283 of 294
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Telecommunication-wavelength lasing in er-doped gan multiple quantum wells at room temperature
( OSA - The Optical Society , 2018 , Conference Paper)We report the realization of room-temperature, stimulated-emission in Er-doped-GaN multiple-quantum-wells at the 1.5-µm. Structures were grown by MOCVD and lasing was confirmed by threshold-behaviors of emission-intensity ... -
Template synthesis of metal tungsten nanowire bundles with high field electron emission performance
( Royal Society of Chemistry , 2016 , Article)One-dimensional (1D) metal nanowires are of great importance for nanodevices due to their distinctive optical, electronic and mechanical properties. Here, for the first time, we report a simple H2 reduction-assisted ... -
The advanced photocatalytic degradation of atrazine by direct Z-scheme Cu doped ZnO/g-C3N4
( Elsevier B.V. , 2019 , Article)Herein, Cu was incorporated into ZnO lattice to reduce its band gap as well as to extend its visible radiation response. The obtained Cu-ZnO was continuously integrated with g-C3N4 to create Cu-ZnO/g-C3N4 Z-direct scheme ... -
The basis number of the strong product of paths and cycles with bipartite graphs
( Central Missouri State University , 2007 , Article)The basis number of a graph G is defined to be the least integer d such that there is a basis B of the cycle space of G such that each edge of G is contained in at most d members of B. MacLane [13] proved that a graph G ... -
The cycle-complete graph Ramsey number r ( C 8 , K 8 )
( Tokyo University of Science , 2007 , Article)The cycle-complete graph Ramsey number r ( C m , K n ) is the smallest integer N such that every graph G of order N contains a cycle C m on m vertices or has independent number α ( G ) ≥ n . ... -
The cycle-complete graph Ramsey number r(C6,K8)≤38
( Tokyo University of Science , 2008 , Article)The cycle-complete graph Ramsey number r ( C m , K n ) is the smallest integer N such that every graph G of order N contains a cycle C m on m vertices or has independent number α ( G ) ≥ n . ... -
The ramsey number for theta graph versus a clique of order three and four
( University of Zielona Gora , 2014 , Article)For any two graphs F1 and F2, the graph Ramsey number r(F1, F2) is the smallest positive integer N with the property that every graph on at least N vertices contains F1 or its complement contains F2 as a subgraph. In ... -
The recent advances in the mechanical properties of self-standing two-dimensional MXene-based nanostructures: Deep insights into the supercapacitor
( MDPI AG , 2020 , Article)MXenes have emerged as promising materials for various mechanical applications due to their outstanding physicochemical merits, multilayered structures, excellent strength, flexibility, and electrical conductivity. Despite ... -
The theta-complete graph Ramsey number r(θk, K5); k = 7, 8, 9
( Forum-Editrice Universitaria Udinese SRL , 2021 , Article)Finding the Ramsey number is an important problem of the well-known family of the combinatorial problems in Ramsey theory. In this work, we investigate the Ramsey number r(θs, K5) for s = 7, 8, 9 where θs is the set of ... -
Thermal and mechanical stability of microwave sintered cold compact bismuth telluride thermoelectric material
( Elsevier , 2022 , Article)Both p-type and n-type bismuth telluride (Bi2Te3)-based thermoelectric materials demonstrate high thermoelectric efficiency in the low-temperature thermoelectric modules, but their constrained thermal and mechanical stability ... -
Thermal characterization of phase change materials based on linear low-density polyethylene, paraffin wax and expanded graphite
( Elsevier Ltd , 2016 , Article)Thermal characterization of Phase Change Materials (PCMs) based on linear low-density polyethylene (LLDPE), paraffin wax (W) and expanded graphite (EG) is reported in this paper. Investigated PCMs showed high potential for ... -
Thermal properties of TiO 2 NP/CNT/LDPE hybrid nanocomposite films
( MDPI AG , 2018 , Article)This work aims to investigate the effect of hybrid filler concentration on the thermal stability of low-density polyethylene (LDPE) matrices. LDPE-based composite films were synthesized by melt mixing, followed by compression ... -
Thermoelectric properties of SbNCa3 and BiNCa3 for thermoelectric devices and alternative energy applications
( Elsevier B.V. , 2014 , Article)Thermoelectric properties of two antiperovskites SbNCa3 and BiNCa3 are calculated using first principles calculations. High values of Seebeck coefficients are observed for these materials. Electrical and thermal conductivities ... -
TiO2 nanotubes and mesoporous silica as containers in self-healing epoxy coatings
( Nature Publishing Group , 2016 , Article)The potential of inorganic nanomaterials as reservoirs for healing agents is presented here. Mesoporous silica (SBA-15) and TiO2 nanotubes (TNTs) were synthesized. Both epoxy-encapsulated TiO2 nanotubes and amine-immobilized ... -
TiO2-pillared clays with well-ordered porous structure and excellent photocatalytic activity
( Royal Society of Chemistry , 2015 , Article)TiO2-pillared clays with well-ordered porous structures are successfully prepared via incorporating TiO2 nanosol particles into the clays, where empty octahedral sites are partially modified with divalent metal ions such ... -
Toward High Power Generating Piezoelectric Nanofibers: Influence of Particle Size and Surface Electrostatic Interaction of Ce-Fe 2 O 3 and Ce-Co 3 O 4 on PVDF
( American Chemical Society , 2019 , Article)Development of flexible piezoelectric nanogenerator (PENG) is a real challenge for the next-generation energy-harvesting applications. In this paper, we report highly flexible PENGs based on poly(vinylidene fluoride) ... -
Towards stacking fault energy engineering in FCC high entropy alloys
( Elsevier , 2022 , Article)Stacking Fault Energy (SFE) is an intrinsic alloy property that governs much of the plastic deformation mechanisms observed in fcc alloys. While SFE has been recognized for many years as a key intrinsic mechanical property, ... -
Tunable metal contacts at layered black-arsenic/metal interface forming during metal deposition for device fabrication
( Nature Research , 2022 , Article)Understanding the kinetics of interfacial reaction in the deposition of metal contacts on 2D materials is important for determining the level of contact tenability and the nature of the contact itself. Here, we find that ... -
Two-Dimensional Mesoporous Heterostructure Delivering Superior Pseudocapacitive Sodium Storage via Bottom-Up Monomicelle Assembly
( American Chemical Society , 2019 , Article)Two-dimensional (2D) heterostructures endowed with mesoporosities offer exciting opportunities in electrocatalysis, photocatalysis, energy storage, and conversion technologies due to their integrated functionalities, ... -
Uniform Ordered Two-Dimensional Mesoporous TiO2 Nanosheets from Hydrothermal-Induced Solvent-Confined Monomicelle Assembly
( American Chemical Society , 2018 , Article)Two-dimensional (2D) nanomaterials have been the focus of substantial research interest recently owing to their fascinating and excellent properties. However, 2D porous materials have remained quite rare due to the difficulty ...