نتایج جستجو برای: gas cvd

تعداد نتایج: 261518  

2012
Ranjit Hawaldar P. Merino M. R. Correia Igor Bdikin José Grácio J. Méndez J. A. Martín-Gago Manoj Kumar Singh

We report hot filament thermal CVD (HFTCVD) as a new hybrid of hot filament and thermal CVD and demonstrate its feasibility by producing high quality large area strictly monolayer graphene films on Cu substrates. Gradient in gas composition and flow rate that arises due to smart placement of the substrate inside the Ta filament wound alumina tube accompanied by radical formation on Ta due to pr...

2015
Dong Hoon Shin Jun Seop Lee Jaemoon Jun Ji Hyun An Sung Gun Kim Kyung Hee Cho Jyongsik Jang

Flower-like palladium nanoclusters (FPNCs) are electrodeposited onto graphene electrode that are prepared by chemical vapor deposition (CVD). The CVD graphene layer is transferred onto a poly(ethylene naphthalate) (PEN) film to provide a mechanical stability and flexibility. The surface of the CVD graphene is functionalized with diaminonaphthalene (DAN) to form flower shapes. Palladium nanopart...

2016
Daewon Kim Hwon Im Moo Jin Kwak Eunkyoung Byun Sung Gap Im Yang-Kyu Choi

A robust superamphiphobic sponge (SA-sponge) is proposed by using a single initiated chemical vapor deposition (i-CVD) process. Poly(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl methacrylate) (PFDMA) is deposited on a commercial sponge by the polymerization of fluoroalkyl acrylates during the i-CVD process. This PFDMA is conformally coated onto both the exterior and interior of the...

Journal: :The Journal of chemical physics 2013
V Seshan D Ullien A Castellanos-Gomez S Sachdeva D H K Murthy T J Savenije H A Ahmad T S Nunney S D Janssens K Haenen M Nesládek H S J van der Zant E J R Sudhölter L C P M de Smet

A high-temperature procedure to hydrogenate diamond films using molecular hydrogen at atmospheric pressure was explored. Undoped and doped chemical vapour deposited (CVD) polycrystalline diamond films were treated according to our annealing method using a H2 gas flow down to ~50 ml∕min (STP) at ~850 °C. The films were extensively evaluated by surface wettability, electron affinity, elemental co...

Journal: :Nano letters 2008
Mario Hofmann Daniel Nezich Alfonso Reina Jing Kong

A new tool for studying the process of carbon nanotube chemical vapor deposition (CVD) synthesis is described. By rotating the substrate in situ during the CVD process, the orientation of floating nanotubes with respect to the substrate is changed by interaction with the gas stream. Nanotubes lying on the surface of the substrate, however, will maintain their relative orientation. As a result d...

Journal: :acta medica iranica 0
nasrin dashti department of clinical laboratory sciences, school of allied medical sciences, tehran university of medical sciences, tehran, iran. nahid einollahi department of clinical laboratory sciences, school of allied medical sciences, tehran university of medical sciences, tehran, iran. fariba nabatchian department of clinical laboratory sciences, school of allied medical sciences, tehran university of medical sciences, tehran, iran. mostafa moradi sarabi departments of medical biochemistry, school of medicine, tehran university of medical sciences, tehran, iran. mitra zarebavani department of clinical laboratory sciences, school of allied medical sciences, tehran university of medical sciences, tehran, iran.

protein- energy malnutrition, wasting and inflammation are frequent complication among patients with end-stage renal disease (esrd). malnutrition is associated with cardiac co-morbidity, inflammation and poor survival in esrd patients. serum albumin is a well-known marker of nutrition in esrd patients. serum albumin is still the most commonly used nutritional marker in esrd patients. c-reactive...

Journal: :journal of nanostructures 2012
m. barzegar m. b. rahmani h. haratizadeh

thin films of sno2 nanowires were successfully prepared by using chemical vapor deposition (cvd) process on quartz substrates. afterwards, a thin  layer of palladium (pd) as a catalyst was coated on top of nanowires. for the deposition of pd, a simple and low cost technique of spray pyrolysis was employed, which caused an intensive enhancement on the sensing response of fabricated sensors. prep...

Journal: :ACS nano 2012
Jack Chan Archana Venugopal Adam Pirkle Stephen McDonnell David Hinojos Carl W Magnuson Rodney S Ruoff Luigi Colombo Robert M Wallace Eric M Vogel

Field-effect transistors fabricated on graphene grown by chemical vapor deposition (CVD) often exhibit large hysteresis accompanied by low mobility, high positive backgate voltage corresponding to the minimum conductivity point (V(min)), and high intrinsic carrier concentration (n(0)). In this report, we show that the mobility reported to date for CVD graphene devices on SiO(2) is limited by tr...

Journal: :Chemical communications 2008
Jiangying Qu Zongbin Zhao Jieshan Qiu Yury Gogotsi

Well-defined carbon polyhedrons with faceted morphologies and hollow internal structures made of self-organized multi-walled carbon nanotubes have been fabricated by gas phase catalytic CVD inside microchannels, of which the confined space is critical for the formation of polyhedral structures with hexagonal, heptagonal and octagonal cross-sections that show superhydrophobic properties, with th...

Journal: :Environment international 2014
Stefan A Ljunggren Ingela Helmfrid Samira Salihovic Bert van Bavel Gun Wingren Mats Lindahl Helen Karlsson

Persistent organic pollutants (POPs) are lipophilic environmental toxins that have been associated with cardiovascular disease (CVD) and cancer. The aim of this study was to investigate the concentrations of POPs in human high and low/very low-density lipoproteins (HDL and LDL/VLDL) and the possible association with CVD and cancer occurrence in individuals living in a contaminated area. Lipopro...

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