scholarly journals Fabrication of Ag:TiO2Nanocomposite Thin Films by Sol-Gel Followed by Electron Beam Physical Vapour Deposition Technique

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Manish Kumar ◽  
Krishna Kumar Parashar ◽  
Sushil Kumar Tandi ◽  
Tanuj Kumar ◽  
D. C. Agarwal ◽  
...  
Keyword(s):  
Electron Beam ◽  
Absorption Band ◽  
Ag Nanoparticles ◽  
Vapour Deposition ◽  
Sol Gel ◽  
Nanocomposite Films ◽  
Physical Vapour Deposition ◽  
Size Estimation ◽  
Morphological Studies ◽  
Vis Spectroscopy

Ag:TiO2nanocomposite films have been synthesized by sol-gel method followed by electron beam physical vapour deposition. Targets for this deposition were prepared by a hydraulic press using a powder containing Ag and TiO2prepared by sol-gel technique. Microstructure, surface, and plasmonic properties of nanocomposite films were studied using glancing angle X-ray diffractometer, atomic force microscopy, field emission secondary electron microscopy, and UV-Vis spectroscopy. Microstructural study reveals that Ag nanoparticles are embedded in TiO2matrix consisting of mixed phases of anatase and rutile. Size estimation using Scherrer formula reveals that average crystallite size of Ag nanoparticles is 23 nm. Surface morphological studies indicate that deposited films are uniform and intact to the substrate and have very low value of root mean square roughness. Optical studies exhibit a surface plasmon resonance induced absorption band in visible region, which is the characteristic feature of Ag nanoparticles. The intensity of this absorption band is found to increase with the increase in deposition time. Multiple peaks observed in absorption band were explained using the concepts of extended Mie scattering. Preliminary experiments also suggested that these nanocomposite films exhibit promising photocatalytic properties, which can be used for water treatment.

Refractive Index Tailoring of Poly(methylmethacrylate) Thin Films by Embedding Silver Nanoparticles

2012 ◽  
Vol 585 ◽  
pp. 134-138 ◽  
Author(s):  
Alisha Goyal ◽  
Jyoti Rozra ◽  
Isha Saini ◽  
Pawan K. Sharma ◽  
Annu Sharma
Keyword(s):  
Thin Films ◽  
Silver Nanoparticles ◽  
Refractive Index ◽  
Band Gap ◽  
Ag Nanoparticles ◽  
Nanocomposite Films ◽  
Ex Situ ◽  
Plasmon Resonance Peak ◽  
Pmma Matrix ◽  
Vis Spectroscopy

Nanocomposite films of Poly (methylmethacrylate) with different concentration of silver nanoparticles were prepared by ex-situ method. Firstly, silver nanoparticles were obtained by reducing the aqueous solution of silver nitrate with sodium borohydride then Ag-PMMA films were prepared by mixing colloidal solution of silver nanoparticles with solution of polymer. Thin solid films were structurally characterized using UV-VIS spectroscopy and TEM. The appearance of surface plasmon resonance peak, characteristic of silver nanoparticles at 420 nm in UV-VIS absorption spectra of Ag-PMMA films confirms the formation of Ag-PMMA nanocomposite. TEM showed Ag nanoparticles of average size 8 nm embedded in PMMA matrix. Analysis of absorption and reflection data indicates towards the reduction in optical band gap and increase in refractive index of the resulting nanocomposite. The synthesized Ag-PMMA nanocomposite has been found to be more conducting than PMMA as ascertained using I-V studies. The decrease in band gap and increase in conductivity can be correlated due to the formation of localized electronic states in PMMA matrix due to insertion of Ag nanoparticles. The PMMA thin films with dispersed silver nanoparticles may be useful for nanophotonic devices.

Emittance of Y2O3 stabilised ZrO2 thermal barrier coatings prepared by electron-beam physical-vapour deposition

2000 ◽  
Vol 32 (3) ◽  
pp. 361-368 ◽  
Author(s):  
Jochen Manara ◽  
Rainer Brandt ◽  
Joachim Kuhn ◽  
Jochen Fricke ◽  
Thomas Krell ◽  
...  
Keyword(s):  
Electron Beam ◽  
Thermal Barrier Coatings ◽  
Vapour Deposition ◽  
Thermal Barrier ◽  
Physical Vapour Deposition ◽  
Barrier Coatings

Electron beam physical vapour deposition and mechanical properties of c-ZrO2-ZTA-coatings on alloy 617 substrates

2012 ◽  
Vol 38 (4) ◽  
pp. 3317-3326 ◽  
Author(s):  
E. Roos ◽  
S.M. Naga ◽  
R.N. Richter ◽  
S. Lauf ◽  
M. Awaad ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Vapour Deposition ◽  
Physical Vapour Deposition ◽  
Alloy 617

Electron beam physical vapour deposition of protective films on carbon reinforced carbon

2000 ◽  
Vol 125 (1-3) ◽  
pp. 331-334 ◽  
Author(s):  
E. Roos ◽  
K. Maile ◽  
A. Lyutovich ◽  
S. Lauf ◽  
H. Kockelmann ◽  
...  
Keyword(s):  
Electron Beam ◽  
Vapour Deposition ◽  
Physical Vapour Deposition ◽  
Protective Films

Synthesis and Characterization of BaTiO3/CoFe2O4 thin films

2011 ◽  
Vol 1368 ◽  
Author(s):  
Helen R. C. S. Andrade ◽  
Luciana M. Seara ◽  
Nelcy D. S. Mohallem
Keyword(s):  
Thin Films ◽  
Barium Titanate ◽  
Cobalt Ferrite ◽  
Sol Gel ◽  
Dip Coating ◽  
Ferroelectric Materials ◽  
Nanocomposite Films ◽  
Ferrite Film ◽  
Vis Spectroscopy ◽  
Quartz Substrates

ABSTRACTNanocomposites formed by ferrimagnetic and ferroelectric materials are multiferroic material in which magnetoelectric coupling occurs via piezoelectricity and magnetostriction phenomena. These nanocomposites have a variety of applications in tunable microwave devices using electric control of spin wave propagation or new magnetic memories in which the magnetic response is controlled by electric field.In this work, transparent and homogeneous thin films of barium titanate interleaved with cobalt ferrite were prepared by sol–gel method using dip-coating process. Films of pure barium titanate and cobalt ferrite were also prepared for comparison. The nanocomposite films were deposited onto clean quartz substrates, where a coating of each material was deposited interleaved, where the cobalt ferrite film formed the last layer. The films were dried in air after each dipping and heated at 900 oC for 1 hour to convert the amorphous films into crystalline ones. The samples were characterized by low angle X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM) and UV-Vis spectroscopy.

Optical and transport properties of Ti-doped In2O3 thin films prepared by electron beam physical vapour deposition

2010 ◽  
Vol 207 (7) ◽  
pp. 1549-1553 ◽  
Author(s):  
J. Sánchez-Marcos ◽  
I. M. Ochando ◽  
R. Escobar Galindo ◽  
R. Martínez-Morillas ◽  
C. Prieto
Keyword(s):  
Thin Films ◽  
Electron Beam ◽  
Transport Properties ◽  
Vapour Deposition ◽  
Physical Vapour Deposition

A Novel Range of Noble Metal Organometallic Fluorides for use in the Fabrication of Submicron Metal Features by E-Beam or UV Irradiation

1998 ◽  
Vol 546 ◽  
Author(s):  
J. Thomson ◽  
A. H. Fzea ◽  
J. Lobban ◽  
P. McGivern ◽  
J. A. Cairns ◽  
...  
Keyword(s):  
Electron Beam ◽  
Noble Metal ◽  
Uv Irradiation ◽  
Vapour Deposition ◽  
Physical Vapour Deposition ◽  
High Quality ◽  
Temperature Range ◽  
Quality Metal

SummaryThe preparation a nd characterisationo f a novel organoplatinum fluoride is described. The physical vapour deposition (PVD) of the material was performed in the temperature range 160–170°C, and electron beam bombardment or uv irradiation, results in the degradation of the compound to give high quality metal features down to dimensions of ca 60 nm.

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