High-Pressure Polymorphs of Molecular Solids:  When Are They Formed, and When Are They Not? Some Examples of the Role of Kinetic Control

2007 ◽  
Vol 7 (9) ◽  
pp. 1662-1668 ◽  
Author(s):  
Elena Boldyreva
Keyword(s):  
High Pressure ◽  
Molecular Solids ◽  
Kinetic Control

Modulating the H-bond strength by varying the temperature for the high pressure synthesis of nitrogen rich carbon nanothreads

Nanoscale ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 5233-5242 ◽  
Author(s):  
Samuele Fanetti ◽  
Mario Santoro ◽  
Frederico Alabarse ◽  
Berretti Enrico ◽  
Roberto Bini
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Bond Strength ◽  
Kinetic Control ◽  
High Pressure Synthesis ◽  
Temperature Conditions ◽  
Pressure Synthesis

Synthesis of carbon nanothreads from pyridine under variable high-pressure and high-temperature conditions discloses the role of H-bonding in the kinetic control of the reaction.

High Pressure Studies of Quantum Well Emission and Deep Emission in GaInP(ordered)-GaAs Heterostructures

1997 ◽  
Vol 499 ◽  
Author(s):  
S. H. Kwok ◽  
P. Y. Yu ◽  
K. Uchida ◽  
T. Arai
Keyword(s):  
High Pressure ◽  
Quantum Well ◽  
Emission Band ◽  
Excitation Power ◽  
High Excitation ◽  
High Pressure Studies ◽  
Band Alignments ◽  
High Pressure Study

ABSTRACTWe report on a high pressure study of emission from a series of GaInP(ordered)/GaAs heterostructures. A so-called “deep emission” band at 1.46 eV is observed in all our samples. At high excitation power, quantum well emission emerges in only one structure where thin GaP layers are inserted on both sides of the GaAs well. From the pressure dependent emission in this sample we have determined its band alignments. The role of the GaP layers in suppressing the deep emission is elucidated.

Role of dislocations in the bcc-hcp transition under high pressure: A first-principles approach in beryllium

2020 ◽  
Vol 4 (6) ◽  
Author(s):  
Vanessa Riffet ◽  
Bernard Amadon ◽  
Nicolas Bruzy ◽  
Christophe Denoual
Keyword(s):  
High Pressure ◽  
First Principles

Anomalous narrowing of the shape of the structural process in derivatives of trehalose at high pressure. The role of the internal structure

2021 ◽  
pp. 116321
Author(s):  
Dawid Heczko ◽  
Joanna Grelska ◽  
Karolina Jurkiewicz ◽  
Patrycja Spychalska ◽  
Anna Kasprzycka ◽  
...  
Keyword(s):  
High Pressure ◽  
Internal Structure ◽  
Structural Process ◽  
Derivatives Of

The Role of Porous Media in Homogenization of High Pressure Diesel Fuel Spray Combustion

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Navid Shahangian ◽  
Damon Honnery ◽  
Jamil Ghojel
Keyword(s):  
High Pressure ◽  
Porous Media ◽  
High Speed ◽  
Fuel Spray ◽  
Compression Ignition Engines ◽  
System Pressure ◽  
Novel Approach ◽  
Air Mixing ◽  
The Media

Interest is growing in the benefits of homogeneous charge compression ignition engines. In this paper, we investigate a novel approach to the development of a homogenous charge-like environment through the use of porous media. The primary purpose of the media is to enhance the spread as well as the evaporation process of the high pressure fuel spray to achieve charge homogenization. In this paper, we show through high speed visualizations of both cold and hot spray events, how porous media interactions can give rise to greater fuel air mixing and what role system pressure and temperature plays in further enhancing this process.

scholarly journals Role of temperature in the numerical analysis of CaO under high pressure

2010 ◽  
Vol 8 (1) ◽  
pp. 126-133 ◽  
Author(s):  
Purvee Bhardwaj ◽  
Sadhna Singh
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Numerical Analysis ◽  
Thermodynamic Properties ◽  
Elastic Constants ◽  
Volume Change ◽  
Thermodynamical Properties ◽  
Phase Transition Pressure ◽  
Different Temperatures

AbstractIn this paper we focus on the elastic and thermodynamic properties of the B1 phase of CaO by using the modified TBP model, including the role of temperature. We have successfully obtained the phase transition pressure and volume change at different temperatures. In addition elastic constants and bulk modulus of B1 phase of CaO at different temperatures are discussed. Our results are comparable with the previous ones at high temperatures and pressures. The thermodynamical properties of the B1 phase of CaO are also predicted.

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