نتایج جستجو برای: exfoliation

تعداد نتایج: 2874  

Journal: :Digital journal of ophthalmology : DJO 2010
John Riffle

A rare case of delamination and replication of the anterior lens capsule into prominent floating folds in the anterior chamber approximately 55 years after a penetrating injury to the eye and anterior lens capsule is reported. Classically, true exfoliation of the anterior lens capsule has been reported in individuals who have been exposed to intense heat over a prolonged period. However, more r...

2015
Sina Abdolhosseinzadeh Hamed Asgharzadeh Hyoung Seop Kim

Exfoliation of graphite is a promising approach for large-scale production of graphene. Oxidation of graphite effectively facilitates the exfoliation process, yet necessitates several lengthy washing and reduction processes to convert the exfoliated graphite oxide (graphene oxide, GO) to reduced graphene oxide (RGO). Although filtration, centrifugation and dialysis have been frequently used in ...

2015
Gábor Zsolt Magda János Pető Gergely Dobrik Chanyong Hwang László P. Biró Levente Tapasztó

Isolating large-areas of atomically thin transition metal chalcogenide crystals is an important but challenging task. The mechanical exfoliation technique can provide single layers of the highest structural quality, enabling to study their pristine properties and ultimate device performance. However, a major drawback of the technique is the low yield and small (typically < 10 μm) lateral size o...

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       The Ghaleh Ganj dioritic- quartz dioritic massifs, as a part of intrusive in the Makran zone show spheroidal weathering and exfoliation. This phenomenon is related to the development of micro-crack systems. Furthermore, various factors such as mechanical properties of rock-forming minerals, tectonic stresses, increasing volume during mineral weathering and earth surface temperature fluct...

Journal: :The British journal of ophthalmology 1973
R S Bartholomew

Pseudocapsular exfoliation occurs in most races and countries but appears to be particularly common in Norway and in the Eastern European and Mediterranean countries. It is rare in American Negroes, only two cases having been reported (Gradle and Sugar, 1947), and in Negroes in the West Indies (Connell, I970), and has not been reported in Negroes elsewhere outside South Africa (Bartholomew, I97...

Journal: :Physical review letters 2004
John F Beacom Nicole F Bell Dan Hooper John G Learned Sandip Pakvasa Thomas J Weiler

Neutrinos may be pseudo-Dirac states, such that each generation is actually composed of two maximally mixed Majorana neutrinos separated by a tiny mass difference. The usual active neutrino oscillation phenomenology would be unaltered if the pseudo-Dirac splittings are deltam(2) less, similar 10(-12) eV(2); in addition, neutrinoless double beta decay would be highly suppressed. However, it may ...

Journal: :Physical chemistry chemical physics : PCCP 2012
Ganesh Kamath Gary A Baker

Free energies for graphene exfoliation from bilayer graphene using ionic liquids based on various cations paired with the bis(trifluoromethylsulfonyl)imide anion were determined from adaptive bias force-molecular dynamics (ABF-MD) simulation and fall in excellent qualitative agreement with experiment. This method has notable potential as an a priori screening tool for performance based rank ord...

2014
I-Wen Peter Chen Chun-Yuan Huang Sheng-Hong Saint Jhou Yu-Wei Zhang

Single-layered graphene has unique electronic, chemical, and electromechanical properties. Recently, graphite exfoliation in N-methylpyrrolidone and molten salt has been demonstrated to generate monolayer exfoliated graphene sheets (EGS). However, these solvents are either high-priced or require special care and have high boiling points and viscosities, making it difficult to deposit the disper...

2015
Rana Sorkhabi Amir Ghorbanihaghjo Mohammad Hossein Ahoor Ehsan kazemi Ehsan Kazemi

The aim of the present study was to determine the level of Tumor necrosis factor-alpha in aqueous humor and serum of patients with pseudo exfoliation syndrome. The materials and methods in this study, we measured the level of Tumor necrosis factor-alpha, in aqueous and serum of patients with pseudo exfoliation syndrome and compared the findings with healthy controls. The Results are Regarding A...

2006
Yang Zhao Han-Xiong Huang

Well dispersion or intercalation/exfoliation of nanoscale fillers (such as nano-CaCO3 and nano-clay) in polymer matrix is currently not easy to be achieved. Supercritical carbon dioxide (ScCO2) has been reported to have great potential for facilitating the dispersion or intercalation/exfoliation of the nanoscale fillers in polymer matrix. So, in this paper, the effects of dissolved ScCO2 on the...

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