Effect of Silver Nanoparticles on the Mechanical and Physical Properties of Epoxy Based Silane Coupling Agent

2013 ◽  
Vol 26 ◽  
pp. 153-158
Author(s):  
B. Vengadaesvaran ◽  
N. Arun ◽  
R. Chanthiriga ◽  
A.R. Bushroa ◽  
S. Ramis Rau ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Room Temperature ◽  
Scratch Test ◽  
Dip Coating ◽  
Precipitation Method ◽  
Transmission Electron ◽  
Mechanical And Physical Properties ◽  
Coating Method ◽  
Dip Coating Method

In this work, silver nanoparticles were synthesized using the precipitation method at room temperature. The size of the silver nanoparticle was analyzed using transmission electron microscope and found to be in the range of 20 to 40 nm. The multi-functional transparent film on glass substrate was prepared using silver nanoparticle solutions and 3-Glycidyloxypropyltrimethoxy silane (GLYMO) by dip coating method. Ultraviolet visible spectroscopy measurement shows low absorbance thus confirming high transparency level. The critical load obtained from the micro-scratch test showed an increase from 3000 mN to 3319 mN.

Fabrication of room temperature H2 gas sensor using pure and La: ZnO with novel nanocorn morphology prepared by sol–gel dip coating method

2014 ◽  
Vol 25 (10) ◽  
pp. 4339-4347 ◽  
Author(s):  
K. S. Venkatesh ◽  
K. Vijayalakshmi ◽  
K. Karthick ◽  
S. R. Krishnamoorthi ◽  
N. S. Palani ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Room Temperature ◽  
Sol Gel ◽  
Dip Coating ◽  
Coating Method ◽  
Dip Coating Method

scholarly journals Surface Modification of LiMn2O4for Lithium Batteries by Nanostructured LiFePO4Phosphate

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
B. Sadeghi ◽  
R. Sarraf-Mamoory ◽  
H. R. Shahverdi
Keyword(s):  
Electron Microscopy ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electrochemical Tests ◽  
Transmission Electron ◽  
Coating Method ◽  
Dip Coating Method ◽  
Spinel Cathode

LiMn2O4spinel cathode materials have been successfully synthesized by solid-state reaction. Surface of these particles was modified by nanostructured LiFePO4via sol gel dip coating method. Synthesized products were characterized by thermally analyzed thermogravimetric and differential thermal analysis (TG/DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDX). The results of electrochemical tests showed that the charge/discharge capacities improved and charge retention of battery enhanced. This improved electrochemical performance is caused by LiFePO4phosphate layer on surfaces of LiMn2O4cathode particles.

scholarly journals Wound Dressings Coated with Silver Nanoparticles and Essential Oils for The Management of Wound Infections

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1682 ◽  
Author(s):  
Bogdan Stefan Vasile ◽  
Alexandra Catalina Birca ◽  
Mihaela Carmen Musat ◽  
Alina Maria Holban
Keyword(s):  
Silver Nanoparticles ◽  
Essential Oils ◽  
Sodium Alginate ◽  
Dip Coating ◽  
Wound Dressings ◽  
Wound Management ◽  
Coating Method ◽  
Efficient Alternative ◽  
Ft Ir ◽  
Dip Coating Method

Infection represents one of the major risk factors in persistent and difficult to treat wounds. This study focuses on developing antimicrobial wound dressings coated with silver nanoparticles, sodium alginate and different essential oils, to avoid wound infection and biofilm formation. The design of the wound dressings was done by the dip coating method. The characteristics of the developed materials were analysed by physicochemical (FT-IR, XRD, SEM, TEM) and biological (antimicrobial tests) approaches. The results demonstrated uniform silver nanoparticle formation on the substrate, and the developed nanomodified dressings were proven to have increased antimicrobial and antibiofilm potential. The developed wound dressings based on silver nanoparticles, sodium alginate and essential oils have real potential in treating infections, and can be investigated as an efficient alternative to antibiotics and topical preparations for wound management.

Characterization of ZnO threads obtained using dip coating method at room temperature

2012 ◽  
Vol 78 ◽  
pp. 159-161 ◽  
Author(s):  
M.R. Alfaro Cruz ◽  
G. Ortega Zarzosa ◽  
G. Martínez Castañón ◽  
J.R. Martinez
Keyword(s):  
Room Temperature ◽  
Dip Coating ◽  
Coating Method ◽  
Dip Coating Method

Properties of zirconia films dispersed with PbS nanoparticles

2000 ◽  
Vol 15 (11) ◽  
pp. 2343-2346 ◽  
Author(s):  
Weimin Huang ◽  
Jianlin Shi
Keyword(s):  
Fluorescence Emission ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Third Order ◽  
Pbs Nanoparticles ◽  
Nonlinear Properties ◽  
Transmission Electron ◽  
Optical Films ◽  
Coating Method ◽  
Dip Coating Method

PbS/ZrO2 optical films were prepared by the dip-coating method from a mixed sol containing two precursors, Zr(OC3H7)4 and Pb(CH3COO)2. The phase structure and size of PbS nanoparticles were characterized by x-ray diffraction and transmission electron microscopy, respectively. Optical absorption and fluorescence spectra were taken on the PbS/ZrO2 films. Larger blue shifts of band edge and weak fluorescence emission of PbS were observed. The third-order nonlinear properties of PbS/ZrO2 films were studied. The calculated values of nonlinear refractive indexes n2 varied between 10−8 and 10−9 cm2/W.

The Growth of Single Crystal-Like and Polycrystal KNbO3 Films Via Sol-Gel Process

1992 ◽  
Vol 271 ◽  
Author(s):  
Chih-Hsing Cheng ◽  
Yuhuan Xu ◽  
John D. Mackenzie ◽  
Jie Zhang ◽  
LeRoy Eyring
Keyword(s):  
Single Crystal ◽  
Sol Gel ◽  
Dip Coating ◽  
Hydrolysis Rate ◽  
Single Crystal Substrate ◽  
Molar Ratios ◽  
Transmission Electron ◽  
Crystal Substrate ◽  
Coating Method ◽  
Dip Coating Method

ABSTRACTTransparent and uniform thin films of crystalline KNbO3 were synthesized on different substrates such as SrTiO3, ZrO2, MgO and Pt by the dip-coating method using a double alkoxides solution. The film was epitaxially crystallized at the temperature around 750°C for 3 hours in air on SrTiO3 single crystal substrate. The structure of the films has been studied with X-ray and electron diffraction, and transmission electron microscopy.Different molar ratios of 2-ethylhexanoic acid (2EHA) to alkoxides were applied to control the hydrolysis rate of the sol-gel solution. Dense films were obtained after modification of the alkoxides solution.

Corrosion Protective Properties of Hydrotalcites Doped Hybrid Sol-Gel Coatings on Aluminium Substrates

2010 ◽  
Vol 636-637 ◽  
pp. 996-1003 ◽  
Author(s):  
D. Álvarez ◽  
A. Collazo ◽  
Miguel Hernández ◽  
Xosé R. Nóvoa ◽  
C. Pérez
Keyword(s):  
Electrochemical Impedance ◽  
Sol Gel ◽  
Dip Coating ◽  
Precipitation Method ◽  
Corrosion Performance ◽  
Protective Properties ◽  
Coating Method ◽  
Dip Coating Method ◽  
Co Precipitation ◽  
Salt Fog

Hydrotalcite-like compound that belongs to anionic clay family was prepared by classical co-precipitation method using magnesium and aluminium nitrates as precursors. Different weight percentages of hydrotalcite with Mg/Al ratio of 2.5 was added (1, 5 and 10 % wt.) to hybrid sols prepared by copolymerization of 3-Glycydoxypropyltrimethoxysilane (GPTMS) and tetra-n-propoxyzirconium (TPOZ). The aim of this work was to study the effect of the hydrotalcite incorporation to hybrid sol-gel coatings on aluminium alloys as substitution of chromate inhibitors. Hybrid sol-gel coatings were deposited by dip coating method on AA2024-T3 substrates. By Scanning Electron Microscopy (SEM) and mechanic profilometry it was possible to see the distribution of HTCP agglomerates which varies from nanometres to micrometers. The corrosion performance was evaluated by the accelerated test salt fog spray chamber (SSFC) and by Electrochemical Impedance Spectroscopy (EIS). The obtained results show the corrosion resistance improvement at higher weight percentages of HTCP.

Optical Properties of Nanostructured Sol–Gel Thin Films Doped with Fe2O3 and Their Ferromagnetic Characterization by Mössbauer Spectroscopy

2008 ◽  
Vol 8 (12) ◽  
pp. 6491-6496
Author(s):  
Jorge Garcia-Macedo ◽  
Guadalupe Valverde-Aguilar ◽  
Raúl W. Gómez ◽  
José L. Pérez-Mazariego ◽  
Vivianne Marquina
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Sol Gel ◽  
Dip Coating ◽  
Optical Quality ◽  
X Ray Diffraction ◽  
Glass Substrates ◽  
Coating Method ◽  
Dip Coating Method

Sol–gel thin films containing Fe2O3 were deposited onto glass substrates by the dip-coating method at room temperature. Fe2O3 enriched with the isotope 57Fe was embedded in two kinds of matrices: zinc oxide (ZnO) and silica (SiO2). X-ray diffraction (XRD) was used for morphology and structure determination of the nanostructures and showed that the ZnO exhibit a wurtzite form when the film is annealed at 450 °C for 20 min. SiO2 thin films at C16H33PEO20:Fe2O3 = 1:2.7 × 10−1 molar concentration exhibit a hexagonal nanophase produced by the diblock copolymer Brij58 (C16H33PEO20). Optical absorption and infrared spectroscopy techniques were used to evaluate the optical quality of the films. In order to determine if the Fe2O3 was incorporated into the matrices, room temperature Mössbauer spectra of both samples were obtained. In both cases the hematite spectrum was obtained, corroborating that the incorporation of the Fe2O3 to the matrices was done without chemical reaction whatsoever.

Ag-Doped TiO2 Immobilized on Al2O3 Bead as Oxidation Catalyst

2007 ◽  
Vol 544-545 ◽  
pp. 13-16
Author(s):  
Thammarat Panyathanmaporn ◽  
Angkhana Jaroenworaluck ◽  
Sitthisuntorn Supothina ◽  
Rung-Arun Chumnanklang ◽  
Kannikar Juengsuwattananon ◽  
...  
Keyword(s):  
Gas Phase ◽  
Catalytic Efficiency ◽  
Dip Coating ◽  
Oxidation Catalyst ◽  
Precipitation Method ◽  
Doped Tio2 ◽  
Oxidation Of Methanol ◽  
Coating Method ◽  
Dip Coating Method ◽  
Co Precipitation

Ag-doped TiO2 catalyst employed as the oxidation catalyst candidate was prepared by two methods, co-precipitation and dip coating method. Co-precipitation method was conducted by adding AgNO3 into the titanium precursor before gelation and then the obtained solution was coated on the alumna beads. Dip coating method was conducted by coating the first layer on alumina beads with titanium precursor followed by coating the second layer with AgNO3. The fired Ag-doped TiO2 coated on alumina beads was used as catalyst for catalytic oxidation of methanol and carbon monoxide by using oxygen as oxidizing agent in a gas-phase reactor. The methods of catalyst preparation were found to affect the catalytic efficiency. Dip coating method showed better oxidation reaction as Ag-doped TiO2 catalysts were well dispersed on the alumina beads.

Room Temperature Photoluminescence of TiO2 Thin Films Doped with Tb

2001 ◽  
Vol 15 (17n19) ◽  
pp. 813-816 ◽  
Author(s):  
A. Conde-Gallardo ◽  
M. García-Rocha ◽  
I. Hernández Calderón ◽  
R. Palomino-Merino
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Sol Gel ◽  
Broad Band ◽  
Dip Coating ◽  
Tio2 Thin Films ◽  
Glass Substrates ◽  
Novel Host ◽  
Coating Method ◽  
Dip Coating Method

Results on the fabrication and characterisation of thin films of the novel host, titania ( TiO 2), for the Tb 3+ activator ion are reported. The titania films were produced by the sol-gel process at room temperature using the dip coating method and deposited on silicon and corning glass substrates. It is shown that a different surface morphology is developed for the TiO 2:Tb films deposited on different substrates. When enough amount of Tb is incorporated and, a He-Cd 325 nm photoexcitation is used as excitation line, the films show green photoluminescence (PL) signal associated with the 5 D 4→7 F j transition of the electronic structure of Tb 3+ plus an broad band due to matrix's defects. The PL emission has better characteristics for the films deposited on silicon wafers.

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