نتایج جستجو برای: van der waals complexes

تعداد نتایج: 338582  

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2012
aminreza noghrehabadia mohammad ghalambaza afshin ghanbarzadeh

in this paper, a monotone positive solution is studied for buckling of a distributed model of multi walled carbon nanotube (mwcnt) cantilevers in the vicinity of thin and thick graphite sheets subject to intermolecular forces. in the modeling of intermolecular forces, van der waals forces are taken into account. a hybrid nano-scale continuum model based on lennard–jones potential is applied to ...

Journal: :Journal of computational chemistry 2012
Milind M. Deshmukh Shigeyoshi Sakaki

Evaluation of intermolecular distance and binding energy (BE) of van der Waals complex/cluster at ab initio level of theory is computationally demanding when many monomers are involved. Starting from MP2 energy, we reached a two-step evaluation method of BE of van der Waals complex/cluster through reasonable approximations; BE = BE(HF) + sum Mi> Mj{BE (Mi- Mj)(MP2 or MP2.5) - BE(Mi-Mj)(HF)} whe...

2017
Zhitao Shen Haitao Ma Chunfang Zhang Mingkai Fu Yanan Wu Wensheng Bian Jianwei Cao

Encouraged by recent advances in revealing significant effects of van der Waals wells on reaction dynamics, many people assume that van der Waals wells are inevitable in chemical reactions. Here we find that the weak long-range forces cause van der Waals saddles in the prototypical C(1D)+D2 complex-forming reaction that have very different dynamical effects from van der Waals wells at low colli...

2009
A. I. Volokitin B. N. J. Persson

All bodies are surrounded by a fluctuating electromagnetic field due to thermal and quantum fluctuations of the current density inside the bodies. This fluctuating field is responsible for many important phenomena such as the radiative heat transfer, the van der Waals interaction and the van der Waals friction between bodies. In contrast to the van der Waals interaction, for which theory is wel...

2015
Kohei Shimamura Masaaki Misawa Ying Li Rajiv K. Kalia Aiichiro Nakano Fuyuki Shimojo Priya Vashishta

Articles you may be interested in Isobaric first-principles molecular dynamics of liquid water with nonlocal van der Waals interactions A simplified implementation of van der Waals density functionals for first-principles molecular dynamics applications J. Density, structure, and dynamics of water: The effect of van der Waals interactions van der Waals isomers and ionic reactivity of the cluste...

Journal: :Physical chemistry chemical physics : PCCP 2008
Ozgür Birer Paolo Moreschini Kevin K Lehmann

We have recorded the electronic spectra of benzo[g,h,i]perylene and coronene and their van der Waals complexes with argon and oxygen with a helium-nanodroplet depletion spectrometer. These molecules differ by the addition of one and two fused benzene rings to perylene, which was previously studied in helium. The coronene spectrum is similar to a previously reported jet-cooled laser-induced fluo...

Journal: :journal of solid mechanics 0
sh dastjerdi department of mechanical engineering, shahrood branch, islamic azad university, shahrood, iran m jabbarzadeh department of mechanical engineering, mashhad branch, islamic azad university, mashhad, iran

in present study, thermo-elastic buckling analysis of multi-layer orthotropic annular/circular graphene sheets is investigated based on eringen’s theory. the moderately thick and also thick nano-plates are considered. using the non-local first and third order shear deformation theories, the governing equations are derived. the van der waals interaction between the layers is simulated for multi-...

2017
Jingyu Li Xiaozhang Chen David Wei Zhang Peng Zhou

Van der Waals heterostructure is formed by two-dimensional materials, which applications have become hot topics and received intensive exploration for fabricating without lattice mismatch. With the sustained decrease in dimensions of field effect transistors, van der Waals heterostructure plays an important role in improving the performance of devices because of its prominent electronic and opt...

M Jabbarzadeh, Sh Dastjerdi

In present study, thermo-elastic buckling analysis of multi-layer orthotropic annular/circular graphene sheets is investigated based on Eringen’s theory. The moderately thick and also thick nano-plates are considered. Using the non-local first and third order shear deformation theories, the governing equations are derived. The van der Waals interaction between the layers is simulated for multi-...

Journal: :The journal of physical chemistry. A 2007
Ozgür Birer Paolo Moreschini Kevin K Lehmann Giacinto Scoles

We have recorded the electronic spectra of three polycyclic aromatic hydrocarbons (acenaphtylene, fluoranthene, and benzo(k)fluoranthene) containing a five-member ring and their van der Waals complexes with argon and oxygen with a molecular beam superfluid helium nanodroplet spectrometer. Although the molecules, which differ by addition of one or two fused benzene rings to acenaphtylene, have t...

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