نتایج جستجو برای: chemical exfoliation

تعداد نتایج: 380518  

2017
Panagiotis G Karagiannidis Stephen A Hodge Lucia Lombardi Flavia Tomarchio Nicolas Decorde Silvia Milana Ilya Goykhman Yang Su Steven V Mesite Duncan N Johnstone Rowan K Leary Paul A Midgley Nicola M Pugno Felice Torrisi Andrea C Ferrari

We report the exfoliation of graphite in aqueous solutions under high shear rate [∼ 108 s-1] turbulent flow conditions, with a 100% exfoliation yield. The material is stabilized without centrifugation at concentrations up to 100 g/L using carboxymethylcellulose sodium salt to formulate conductive printable inks. The sheet resistance of blade coated films is below ∼2Ω/□. This is a simple and sca...

2016
ANASTASIA KARpOvICH MARIA vLASOvA NATALYA SApRONOvA vALENTIN SUKHAREv vICTOR IvANOv

The interaction between Laponite and other constituents in complex systems greatly depends on its available surface area. We report a study of exfoliation dynamics of Laponite in aqueous suspensions by NMR relaxometry. It showed that Laponite particles exfoliate to the same extent in a concentration range of 0.5-3% w/w. Faster increase of specific wetted surface area of Laponite particles in mo...

Journal: :Nature materials 2014
Keith R Paton Eswaraiah Varrla Claudia Backes Ronan J Smith Umar Khan Arlene O'Neill Conor Boland Mustafa Lotya Oana M Istrate Paul King Tom Higgins Sebastian Barwich Peter May Pawel Puczkarski Iftikhar Ahmed Matthias Moebius Henrik Pettersson Edmund Long João Coelho Sean E O'Brien Eva K McGuire Beatriz Mendoza Sanchez Georg S Duesberg Niall McEvoy Timothy J Pennycook Clive Downing Alison Crossley Valeria Nicolosi Jonathan N Coleman

To progress from the laboratory to commercial applications, it will be necessary to develop industrially scalable methods to produce large quantities of defect-free graphene. Here we show that high-shear mixing of graphite in suitable stabilizing liquids results in large-scale exfoliation to give dispersions of graphene nanosheets. X-ray photoelectron spectroscopy and Raman spectroscopy show th...

Journal: :The journal of physical chemistry letters 2014
Haegyeom Kim Dong-Hwa Seo Gabin Yoon William A Goddard Yun Sung Lee Won-Sub Yoon Kisuk Kang

Herein, we explore the capacity degradation of dilithium rhodizonate salt (Li2C6O6) in lithium rechargeable batteries based on detailed investigations of the lithium de/insertion mechanism in Li2C6O6 using both electrochemical and structural ex situ analyses combined with first-principles calculations. The experimental observations indicate that the LixC6O6 electrode undergoes multiple two-phas...

Journal: :Nanoscale 2016
J M Munuera J I Paredes S Villar-Rodil M Ayán-Varela A Martínez-Alonso J M D Tascón

Electrolytic--usually referred to as electrochemical--exfoliation of graphite in water under anodic potential holds enormous promise as a simple, green and high-yield method for the mass production of graphene, but currently suffers from several drawbacks that hinder its widespread adoption, one of the most critical being the oxidation and subsequent structural degradation of the carbon lattice...

2017
Courtney P Amegashie Nicole M Gilbert Jeffrey F Peipert Jenifer E Allsworth Warren G Lewis Amanda L Lewis

OBJECTIVE Clue cells characteristic of bacterial vaginosis (BV) are thought to arise due to exfoliation of the vaginal epithelium; however, there is little published data connecting total numbers of epithelial cells to markers of BV. The purpose of this study was to enumerate exfoliated epithelial cells (independent of clue cells) and examine the relationship to Nugent score. STUDY DESIGN We ...

Journal: :Journal of The Electrochemical Society 2022

Hydrogen is a promising alternative to gasoline due its higher energy density and ability burn cleanly only producing H 2 O as by-product. Electrolytic water splitting an effective technique for generating molecular hydrogen. However, hydrogen be viable source produced from electrolysis, affordable durable electrocatalysts need developed replace platinum. Transition metal dichalcogenides (TMDs)...

2010
WISAM SHIHADEH ROBERT RITCH

EXFOLIATION SYNDROME Overview Exfoliation syndrome is the most widespread, classifiable cause of open-angle glaucoma worldwide.1 In this age-related disorder, fibrillar extracellular materials are produced by and accumulate in various ocular tissues (Figure 1). Friction between the anterior lens capsule and the iris disrupts the iris pigment epithelium, dispersing pigment throughout the anterio...

Journal: :Analytica chimica acta 2014
Can Wu Qin Cheng Kangbing Wu Gang Wu Qing Li

Graphene was easily obtained via one-step ultrasonic exfoliation of graphite powder in N-methyl-2-pyrrolidone. Scanning electron microscopy, transmission electron microscopy, Raman and particle size measurements indicated that the exfoliation efficiency and the amount of produced graphene increased with ultrasonic time. The electrochemical properties and analytical applications of the resulting...

Journal: :Journal of cataract and refractive surgery 2012
Jessica L M Ting Karim F Damji Michael C Stiles

PURPOSE To compare outcomes in exfoliation glaucoma versus primary open-angle glaucoma (POAG) after ab interno trabeculectomy alone (Trabectome) or in combination with cataract surgery and intraocular lens (IOL) implantation. SETTING Trabectome Study Group institutions. DESIGN Prospective nonrandomized cohort study. METHODS Outcomes included intraocular pressure (IOP), glaucoma medication...

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