scholarly journals Progress on Diamane and Diamanoid Thin Film Pressureless Synthesis

2021 ◽  
Vol 7 (1) ◽  
pp. 9
Author(s):  
Fabrice Piazza ◽  
Marc Monthioux ◽  
Pascal Puech ◽  
Iann C. Gerber ◽  
Kathleen Gough
Keyword(s):  
Density Functional ◽  
Large Scale ◽  
Density Functional Theory Calculations ◽  
Wide Band ◽  
Scale Production ◽  
Layer Graphene ◽  
Large Scale Production ◽  
Bernal Stacking ◽  
Hydrogen Radicals ◽  
Few Layer Graphene

Nanometer-thick and crystalline sp3-bonded carbon sheets are promising new wide band-gap semiconducting materials for electronics, photonics, and medical devices. Diamane was prepared from the exposure of bi-layer graphene to hydrogen radicals produced by the hot-filament process at low pressure and temperature. A sharp sp3-bonded carbon stretching mode was observed in ultraviolet Raman spectra at around 1344–1367 cm−1 while no sp2-bonded carbon peak was simultaneously detected. By replacing bi-layer graphene with few-layer graphene, diamanoid/graphene hybrids were formed from the partial conversion of few-layer graphene, due to the prevalent Bernal stacking sequence. Raman spectroscopy, electron diffraction, and Density Functional Theory calculations show that partial conversion generates twisted bi-layer graphene located at the interface between the upper diamanoid domain and the non-converted graphenic domain underneath. Carbon-hydrogen bonding in the basal plane of hydrogenated few-layer graphene, where carbon is bonded to a single hydrogen over an area of 150 μm2, was directly evidenced by Fourier transform infrared microscopy and the actual full hydrogenation of diamane was supported by first-principle calculations. Those results open the door to large-scale production of diamane, diamanoids, and diamanoid/graphene hybrids.

Simultaneous electrochemical-assisted exfoliation and in situ surface functionalization towards large-scale production of few-layer graphene

FlatChem ◽  
2019 ◽  
Vol 18 ◽  
pp. 100132 ◽  
Author(s):  
Omid Zabihi ◽  
Mojtaba Ahmadi ◽  
Quanxiang Li ◽  
Seyed Mousa Fakhrhoseini ◽  
Zahra Komeily Nia ◽  
...  
Keyword(s):  
Surface Functionalization ◽  
Large Scale ◽  
Scale Production ◽  
Layer Graphene ◽  
Large Scale Production ◽  
Few Layer Graphene

Synthesis of few-layer graphene-like nanosheets from glucose: New facile approach for graphene-like nanosheets large-scale production

2016 ◽  
Vol 31 (4) ◽  
pp. 455-467 ◽  
Author(s):  
Marwa Adel ◽  
Azza El-Maghraby ◽  
Ossama El-Shazly ◽  
El-Wahidy F. El-Wahidy ◽  
Marwa A. A. Mohamed
Keyword(s):  
Large Scale ◽  
Scale Production ◽  
Layer Graphene ◽  
Large Scale Production ◽  
Image Position ◽  
Few Layer Graphene

Abstract

Ion assisted deposition—large-scale production of a wide band antireflection coating on ophthalmic lenses

Vacuum ◽  
1991 ◽  
Vol 42 (16) ◽  
pp. 1060
Author(s):  
F Andreani ◽  
S Luridiana ◽  
G Viscomi ◽  
Mao Shuzheng
Keyword(s):  
Large Scale ◽  
Wide Band ◽  
Antireflection Coating ◽  
Scale Production ◽  
Large Scale Production

scholarly journals SMA-Assisted Exfoliation of Graphite by Microfluidization for Efficient and Large-Scale Production of High-Quality Graphene

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1653 ◽  
Author(s):  
Yuzhou Wang ◽  
Xianye Zhang ◽  
Haihui Liu ◽  
Xingxiang Zhang
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Cost Effective ◽  
Scale Production ◽  
Polyamide 66 ◽  
High Quality ◽  
Uniform Size ◽  
Large Scale Production ◽  
Maleic Anhydride Copolymer ◽  
Few Layer Graphene

In this paper, the sodium salt of styrene-maleic anhydride copolymer (SMA) was used as a stabilizer in the process of graphite exfoliation to few-layer graphene using the technique of microfluidization in water. This method is simple, scalable, and cost-effective, and it produces graphene at concentrations as high as 0.522 mg mL−1. The generated high-quality graphene consists of few-layer sheets with a uniform size of less than 1 μm. The obtained graphene was uniformly dispersed and tightly integrated into a polyamide 66 (PA66) matrix to create high-performance multifunctional polymer nanocomposites. The tensile strength and thermal conductivity of 0.3 and 0.5 wt% EG/PA66 composites were found to be ~32.6% and ~28.8% greater than the corresponding values calculated for pure PA66, respectively. This confirms that the new protocol of liquid phase exfoliation of graphite has excellent potential for use in the industrial-scale production of high-quality graphene for numerous applications.

I. S. A. Baud. Forms of Production and Women's Labour: Gender Aspects of Industrialisation in India and Mexico. New Delhi: Sage Publications. 1992. 321 pp.Hardbound. Price: Indian Rs 295.00.

1993 ◽  
Vol 32 (1) ◽  
pp. 129-131
Author(s):  
Naureen Talha
Keyword(s):  
Large Scale ◽  
Indian Society ◽  
New Delhi ◽  
Scale Production ◽  
Female Labour ◽  
Self Employment ◽  
Commodity Production ◽  
Large Scale Production ◽  
Mexican Society ◽  
Small Production

The literature on female labour in Third World countries has become quite extensive. India, being comparatively more advanced industrially, and in view of its size and population, presents a pictures of multiplicity of problems which face the female labour market. However, the author has also included Mexico in this analytical study. It is interesting to see the characteristics of developing industrialisation in two different societies: the Indian society, which is conservative, and the Mexican society, which is progressive. In the first chapter of the book, the author explains that he is not concerned with the process of industrialisation and female labour employed at different levels of work, but that he is interested in forms of production and women's employment in large-scale production, petty commodity production, marginal small production, and self-employment in the informal sector. It is only by analysis of these forms that the picture of females having a lower status is understood in its social and political setting.

An Efficient and Improved Process for the Synthesis of Itopride Hydrochloride and Trimethobenzamide Hydrochloride

2018 ◽  
Vol 15 (4) ◽  
pp. 572-575 ◽  
Author(s):  
Ponnusamy Kannan ◽  
Samuel I.D. Presley ◽  
Pallikondaperumal Shanmugasundaram ◽  
Nagapillai Prakash ◽  
Deivanayagam Easwaramoorthy
Keyword(s):  
Large Scale ◽  
Hydroxylamine Hydrochloride ◽  
Scale Production ◽  
One Pot ◽  
Hydrochloride Salt ◽  
Environmental Friendly ◽  
Large Scale Production ◽  
Non Ulcer Dyspepsia ◽  
Itopride Hydrochloride ◽  
Yield And Purity

Aim and Objective: Itopride is a prokinetic agent used for treating conditions like non-ulcer dyspepsia. Itopride is administered as its hydrochloride salt. Trimethobenzamide is used for treating nausea and vomiting and administered as its hydrochloride salt. The aim is to develop a novel and environmental friendly method for large-scale production of itopride and trimethobenzamide. Materials and Methods: Itopride and trimethobenzamide can be prepared from a common intermediate 4- (dimethylaminoethoxy) benzyl amine. The intermediate is prepared from one pot synthesis using Phyrdroxybenzaldehye and zinc dust and further reaction of the intermediate with substituted methoxy benzoic acid along with boric acid and PEG gives itopride and trimethobenzamide. Results: The intermediate 4-(dimethylaminoethoxy) benzylamine is prepared by treating p-hydroxybenzaldehyde and 2-dimethylaminoethyl chloride. The aldehyde formed is treated with hydroxylamine hydrochloride. The intermediate is confirmed by NMR and the purity is analysed by HPLC. Conclusion: Both itopride and trimethobenzamide were successfully synthesized by this method. The developed method is environmental friendly, economical for large-scale production with good yield and purity.

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