Temperature-Dependent Properties of Water-in-Oil Microemulsions with Amphiphilic Triblock-Copolymer. Part I:  Dynamics, Particle Interactions, and Network Formation

1999 ◽  
Vol 103 (44) ◽  
pp. 9432-9441 ◽  
Author(s):  
Holger Mays ◽  
Mats Almgren
Keyword(s):  
Triblock Copolymer ◽  
Network Formation ◽  
Particle Interactions ◽  
Temperature Dependent ◽  
Amphiphilic Triblock Copolymer ◽  
Temperature Dependent Properties

Cluster and Network Formation toward Percolation in the Microemulsion L2Phase Formed by an Amphiphilic Triblock Copolymer and Water inp-Xylene

Langmuir ◽  
1998 ◽  
Vol 14 (4) ◽  
pp. 723-725 ◽  
Author(s):  
Holger Mays ◽  
Mats Almgren ◽  
Wyn Brown ◽  
Paschalis Alexandridis
Keyword(s):  
Triblock Copolymer ◽  
Network Formation ◽  
Amphiphilic Triblock Copolymer

SYNTHESIS AND ORGANIZATION OF II–VI LOW DIMENSION NANOMATERIALS IN NONIONIC AMPHIPHILIC TRIBLOCK COPOLYMER SYSTEMS

2003 ◽  
Vol 02 (04n05) ◽  
pp. 257-263 ◽  
Author(s):  
CHUNG-SUNG YANG ◽  
KUO-LUNG KU
Keyword(s):  
Aqueous Phase ◽  
Triblock Copolymer ◽  
Triblock Copolymers ◽  
Synthetic Route ◽  
Temperature Dependent ◽  
Znse Nanoparticles ◽  
Cds Nanorods ◽  
Amphiphilic Triblock Copolymer ◽  
Low Dimension ◽  
Selection Of

A new synthetic route to prepare II–VI nanoscale materials, such as CdS nanorods and ZnSe nanoparticles is demonstrated and the advantage of using nonionic triblock copolymer systems,i.e., H (– OCH 2 CH 2)x[– OCH ( CH 3)– CH 2]y(– OCH 2 CH 2)y– OH , or ( EO )x( PO )y( EO )x as structure-directing agents in the synthesis of low dimension nanomaterials is introduced. The effect of (EO)/(PO) ratio in controlling the diameter and the morphology of the final product is addressed. The employ of F127 [( EO )106( PO )70( EO )106] as a surfactant-template to study the temperature-dependent size-selection of ZnSe nanoparticles is also presented. We observe that the larger ZnSe nanoparticles are arrested first by the hydrophilic fractions of triblock copolymers F127, while the smaller particles still remain their thermal motion in the aqueous phase.

scholarly journals Temperature-Dependent Properties of Molten Li2BeF4 Salt Using Ab Initio Molecular Dynamics

ACS Omega ◽  
2021 ◽  
Author(s):  
Khagendra Baral ◽  
Saro San ◽  
Ridwan Sakidja ◽  
Adrien Couet ◽  
Kumar Sridharan ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Ab Initio ◽  
Ab Initio Molecular Dynamics ◽  
Temperature Dependent ◽  
Temperature Dependent Properties

Crystal structure and temperature-dependent properties of Na2H4Ga2GeO8 – a novel gallogermanate

2020 ◽  
Vol 75 (9-10) ◽  
pp. 805-813
Author(s):  
Irma Peschke ◽  
Lars Robben ◽  
Christof Köhler ◽  
Thomas Frauenheim ◽  
Josef-Christian Buhl ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Decomposition Temperature ◽  
Spectroscopic Techniques ◽  
Charge Balance ◽  
Temperature Dependent ◽  
Raman Spectroscopic ◽  
Debye Temperatures ◽  
Diffraction Lattice ◽  
Temperature Dependent Properties ◽  
Balance Structure

AbstractSynthesis, crystal structure and temperature-dependent behavior of Na2H4Ga2GeO8 are reported. This novel gallogermanate crystallizes in space group I41/acd with room-temperature powder diffraction lattice parameters of a = 1298.05(1) pm and c = 870.66(1) pm. The structure consists of MO4 (M = Ga, Ge) tetrahedra in four-ring chains, which are connected by two different (left- and right-handed) helical chains of NaO6 octahedra. Protons coordinating the oxygen atoms of the GaO4 tetrahedra not linked to germanium atoms ensure the charge balance. Structure solution and refinement are based on single crystal X-ray diffraction measurements. Proton positions are estimated using a combined approach of DFT calculations and NMR, FTIR and Raman spectroscopic techniques. The thermal expansion was examined in the range between T = 20(2) K and the compound’s decomposition temperature at 568(5) K, in which no phase transition could be observed, and Debye temperatures of 266(11) and 1566(65) K were determined for the volume expansion.

scholarly journals A new boundary element algorithm for modeling and simulation of nonlinear thermal stresses in micropolar FGA composites with temperature-dependent properties

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Mohamed Abdelsabour Fahmy
Keyword(s):  
Modeling And Simulation ◽  
Boundary Element ◽  
Thermal Stresses ◽  
Computation Time ◽  
Functionally Graded ◽  
Temperature Dependent ◽  
Time Step ◽  
Kirchhoff Transformation ◽  
Nonlinear Temperature ◽  
Temperature Dependent Properties

AbstractThe main aim of this article is to develop a new boundary element method (BEM) algorithm to model and simulate the nonlinear thermal stresses problems in micropolar functionally graded anisotropic (FGA) composites with temperature-dependent properties. Some inside points are chosen to treat the nonlinear terms and domain integrals. An integral formulation which is based on the use of Kirchhoff transformation is firstly used to simplify the transient heat conduction governing equation. Then, the residual nonlinear terms are carried out within the current formulation. The domain integrals can be effectively treated by applying the Cartesian transformation method (CTM). In the proposed BEM technique, the nonlinear temperature is computed on the boundary and some inside domain integral. Then, nonlinear displacement can be calculated at each time step. With the calculated temperature and displacement distributions, we can obtain the values of nonlinear thermal stresses. The efficiency of our proposed methodology has been improved by using the communication-avoiding versions of the Arnoldi (CA-Arnoldi) preconditioner for solving the resulting linear systems arising from the BEM to reduce the iterations number and computation time. The numerical outcomes establish the influence of temperature-dependent properties on the nonlinear temperature distribution, and investigate the effect of the functionally graded parameter on the nonlinear displacements and thermal stresses, through the micropolar FGA composites with temperature-dependent properties. These numerical outcomes also confirm the validity, precision and effectiveness of the proposed modeling and simulation methodology.

scholarly journals Time dependent and temperature dependent properties of the forward voltage characteristic of InGaN high power LEDs

AIP Advances ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 035206
Author(s):  
P. L. Fulmek ◽  
P. Haumer ◽  
F. P. Wenzl ◽  
W. Nemitz ◽  
J. Nicolics
Keyword(s):  
High Power ◽  
Voltage Characteristic ◽  
Time Dependent ◽  
Temperature Dependent ◽  
Forward Voltage ◽  
Temperature Dependent Properties
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