نتایج جستجو برای: mechanochemical

تعداد نتایج: 2381  

2007
Laszlo Takacs

Most historical reviews of mechanochemistry mention the papers of Matthew Carey Lea as the first systematic investigations on the chemical effects of mechanical action. Yet, very little is known about the person, his motivation and the details of his results. The original literature is not easily accessible and the two existing biographies (1, 2) focus on his results in photochemistry and the s...

2015
Xiaoding Wei Lily Mao Rafael A. Soler-Crespo Jeffrey T. Paci Jiaxing Huang SonBinh T. Nguyen Horacio D. Espinosa

The ability to bias chemical reaction pathways is a fundamental goal for chemists and material scientists to produce innovative materials. Recently, two-dimensional materials have emerged as potential platforms for exploring novel mechanically activated chemical reactions. Here we report a mechanochemical phenomenon in graphene oxide membranes, covalent epoxide-to-ether functional group transfo...

2015
Paul Egan Jeffrey Moore Christian D. Schunn Jonathan Cagan Philip LeDuc

In complex systems with stochastic components, systems laws often emerge that describe higher level behavior regardless of lower level component configurations. In this paper, emergent laws for describing mechanochemical systems are investigated for processive myosin-actin motility systems. On the basis of prior experimental evidence that longer processive lifetimes are enabled by larger myosin...

2009
Yunxin Zhang

Molecular motors are single macromolecules that generate forces at the piconewton range and nanometer scale. They convert chemical energy into mechanical work by moving along filamentous structures. In this paper, we study the velocity of two-head molecular motors in the framework of a mechanochemical network theory. The network model, a generalization of the recently work of Liepelt and Lipows...

2016
Junpeng Wang Tatiana B Kouznetsova Roman Boulatov Stephen L Craig

Covalent polymer mechanochemistry offers promising opportunities for the control and engineering of reactivity. To date, covalent mechanochemistry has largely been limited to individual reactions, but it also presents potential for intricate reaction systems and feedback loops. Here we report a molecular architecture, in which a cyclobutane mechanophore functions as a gate to regulate the activ...

2016
Oleh Boshko Mykola Dashevskyi Olga Mykhaliuk Kateryna Ivanenko Smail Hamamda Sergiy Revo

Nanocomposite materials of the Fe-Cu system with/without small addition of carbon nanotubes have been synthesized by mechanochemical activation of elemental Fe and Cu powders in a high-energy planetary ball mill and have been examined by the X-ray diffraction method, SEM and the thermopower methods; the tensile strength of the materials obtained has been estimated. The metastable (Fe, Cu) super...

2009
Yunxin Zhang Anatoly B. Kolomeisky

Molecular motors are biogenic force generators acting in the nanometer range. They convert chemical energy into mechanical work and move along filamentous structures. In this research, we will discuss the velocity of molecular motors, in framework of a mechanochemical network theory. Our network model is based on the distinct mechanochemical states of molecular motors. It can be regarded as a g...

2017
Desirée Leistenschneider Nicolas Jäckel Felix Hippauf Volker Presser Lars Borchardt

A solvent-free synthesis of hierarchical porous carbons is conducted by a facile and fast mechanochemical reaction in a ball mill. By means of a mechanochemical ball-milling approach, we obtained titanium(IV) citrate-based polymers, which have been processed via high temperature chlorine treatment to hierarchical porous carbons with a high specific surface area of up to 1814 m2 g-1 and well-def...

2012
YUKIE GOTO

The mechanochemical model proposed in 1983 by G. Oster, J. D. Murray and A. K. Harris has been deployed to describe various morphological phenomena in biology, such as feather bud formation [17] and angiogenesis and vasculogenesis [10, 13]. In this article, we apply a mechanochemical model to the formation of a somite to better understand the role that the mechanical aspects of the cells and th...

2012
Xusheng Du Hong-Yuan Liu Guipeng Cai Yiu-Wing Mai Avinash Baji

A facile approach to functionalize carbon nanofibers [CNFs] with nanostructured polyaniline was developed via in situ mechanochemical polymerization of polyaniline in the presence of chemically treated CNFs. The nanostructured polyaniline grafting on the CNF was mainly in a form of branched nanofibers as well as rough nanolayers. The good dispersibility and processability of the hybrid nanocomp...

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