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Study of Nanometric Machining in Crystalline Solids Using Molecular Dynamics

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Ethynylbenziodoxol(on)e (EBX) cyclic hypervalent iodine reagents have become popular reagents for the alkynylation of radicals and nucleophiles, but only offer limited possibilities for further structure and reactivity fine-tuning. Herein, the synthesis of ...

2021

Atomistic modeling of the solid-liquid interface of metals and alloys

Edoardo Baldi

Solidification is a phase transformation of utmost importance in material science, for it largely controls materials' microstructure on which a wide range of mechanical properties depends. Almost every human artifact undergoes a transformation that leads t ...

EPFL2020

Charge fluctuations from molecular simulations in the constant-potential ensemble

Sara Bonella, Alessandro Coretti

We revisit the statistical mechanics of charge fluctuations in capacitors. In constant-potential classical molecular simulations, the atomic charges of electrode atoms are treated as additional degrees of freedom which evolve in time so as to satisfy the c ...

2020

The role of atomistic simulations in probing hydrogen effects on plasticity and embrittlement in metals

William Curtin, Ali Tehranchi

Atomistic simulations are a powerful complement to experimental probes for understanding the nanoscale processes associated with the effects of hydrogen (H) on plasticity and fracture that are the underlying causes of hydrogen embrittlement (HE). Current e ...

PERGAMON-ELSEVIER SCIENCE LTD2019

i-PI 2.0: A universal force engine for advanced molecular simulations

Michele Ceriotti, David Mark Wilkins, Bingqing Cheng, Venkat Kapil, Riccardo Petraglia, Gareth Aneurin Tribello, Mariana Rossi Carvalho, Benjamin Aaron Helfrecht, Robert Horst Meissner, Alice Cuzzocrea, Sébastien Pierre Bienvenue, Przemyslaw Juda, Wei Fang

Progress in the atomic-scale modeling of matter over the past decade has been tremendous. This progress has been brought about by improvements in methods for evaluating interatomic forces that work by either solving the electronic structure problem explici ...

ELSEVIER SCIENCE BV2019

Naphthalene crystal shape prediction from molecular dynamics simulations

Pablo Miguel Piaggi, Michele Parrinello

We used molecular dynamics simulations to predict the steady state crystal shape of naphthalene grown from ethanol solution. The simulations were performed at constant supersaturation by utilizing a recently proposed algorithm [Perego et al., J. Chem. Phys ...

2019

La société évolue, les modes de vie se diversifient, les structures familiales changent et la population vieillit. Comment l’architecture peut-elle répondre à ces enjeux sociétaux? En plaçant la personne âgée au cœur de la réflexion architecturale, le proj ...

2019

Hydrogen dynamics in solid formic acid: insights from simulations with quantum colored-noise thermostats

Venkat Kapil

With an increase of computational capabilities, ab initio molecular dynamics becomes the natural choice for exploring the nuclear dynamics of solids. As based on classical mechanics, the validity of this approach is, in-principle, limited to the high-T reg ...

IOP PUBLISHING LTD2018

First-Principles Statistical Mechanics of Multicomponent Crystals

Anirudh Raju Natarajan

The importance of configurational, vibrational, and electronic excitations in crystalline solids of technological interest makes a rigorous treatment of thermal excitations an essential ingredient in first-principles models of materials behavior. This cont ...

Annual Reviews2018

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The flying ice cube effect is a molecular dynamics simulation artifact in which the use of velocity rescaling thermostats sometimes causes violation of the equipartition theorem, affecting both structural and dynamic properties. The reason for this artifac ...

2018