Characterization of a graphene oxide/poly(acrylic acid) nanocomposite by means of molecular dynamics simulations

RSC Advances ◽  
2016 ◽  
Vol 6 (111) ◽  
pp. 109267-109277 ◽  
Author(s):  
Kostas Karatasos ◽  
Georgios Kritikos
Keyword(s):  
Molecular Dynamics ◽  
Hydrogen Bonding ◽  
Graphene Oxide ◽  
Thermal Properties ◽  
Acrylic Acid ◽  
Molecular Dynamics Simulations ◽  
Dynamics Simulations ◽  
Poly Acrylic Acid

Graphene oxide/poly(acrylic acid) nanocomposite: static, dynamic, thermal properties and hydrogen bonding, as studied by molecular dynamics simulations.

scholarly journals A Theoretical Study on Trehalose + Water Mixtures for Dry Preservation Purposes

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1435
Author(s):  
Amit Kumar ◽  
Alberto Cincotti ◽  
Santiago Aparicio
Keyword(s):  
Molecular Dynamics ◽  
Hydrogen Bonding ◽  
Molecular Dynamics Simulations ◽  
Theoretical Study ◽  
Mixture Composition ◽  
Detailed Characterization ◽  
Local Dynamics ◽  
Water Structuring ◽  
Dynamics Simulations

The properties of trehalose + water mixtures are studied as a function of mixture composition and temperature using molecular dynamics simulations. As trehalose disaccharide has been proposed for dry preservation purposes, the objective of this work is to analyse the nanoscopic properties of the considered mixtures, in terms of aggregation, clustering, interactions energies, and local dynamics, and their relationships with hydrogen bonding. The reported results allow a detailed characterization of hydrogen bonding and its evolution with mixture composition and thus inferring the effects of trehalose on water structuring providing results to justify the mechanisms of trehalose acting as preservation agent.

Molecular dynamics simulations reveal the mechanism of graphene oxide nanosheet inhibition of Aβ1–42 peptide aggregation

2019 ◽  
Vol 21 (21) ◽  
pp. 10981-10991 ◽  
Author(s):  
Yibo Jin ◽  
Yunxiang Sun ◽  
Yujie Chen ◽  
Jiangtao Lei ◽  
Guanghong Wei
Keyword(s):  
Molecular Dynamics ◽  
Hydrogen Bonding ◽  
Graphene Oxide ◽  
Molecular Dynamics Simulations ◽  
Salt Bridge ◽  
Graphene Oxide Nanosheets ◽  
Peptide Interactions ◽  
Graphene Oxide Nanosheet ◽  
Dynamics Simulations ◽  
Β Sheet

Graphene oxide nanosheets inhibit Aβ1–42 aggregation by weakening inter-peptide interactions and reducing β-sheet contents mostly via salt bridge, hydrogen bonding and cation–π interactions with charged residues.

scholarly journals Thermal Properties of Yttrium Aluminum Garnett From Molecular Dynamics Simulations

2011 ◽  
Author(s):  
Majid S. al-Dosari ◽  
D. G. Walker
Keyword(s):  
Thermal Conductivity ◽  
Molecular Dynamics ◽  
Thermal Expansion ◽  
Thermal Properties ◽  
Specific Heat ◽  
Molecular Dynamics Simulations ◽  
Yttrium Aluminum Garnet ◽  
System Size ◽  
Yttrium Aluminum ◽  
Dynamics Simulations

Yttrium Aluminum Garnet (YAG, Y3Al5O12) and its varieties have applications in thermographic phosphors, lasing mediums, and thermal barriers. In this work, thermal properties of crystalline YAG where aluminum atoms are substituted with gallium atoms (Y3(Al1−xGax)5O12) are explored with molecular dynamics simulations. For YAG at 300K, the simulations gave values close to experimental values for constant-pressure specific heat, thermal expansion, and bulk thermal conductivity. For various values of x, the simulations predicted no change in thermal expansion, an increase in specific heat, and a decrease in thermal conductivity for x = 50%. Furthermore, the simulations predicted a decrease in thermal conductivity with decreasing system size.

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