Preparation, Characterization, And Physical Properties Of A Nanostructured Materials Of Silver ( Nanoparticles And Nanocomposites )

The empirical formula for silver oxide for trial one is Ag5O4 and for trial two is Ag3O2. For trial one there is 0.451 grams of silver were produced from 0.504 grams of silver oxide. For trial two there is 0.456 grams of silver were produced from 0.500 grams of silver oxide. The difference between the mass of silver oxide and mass of silver is the mass of oxygen that vaporized into the air. There are 0.053 grams of oxygen vaporized into the air for trial one and 0.456 grams’ oxygen for trial two.

-If the copper metal is submerged in the silver nitrate solution then in reaction, a pure, solid (Ag) silver product is created with an excess of (Cu (NO3)2) copper (II) aqueous liquid because a single displacement reaction occurs where the balance equation is then

ABSTRACT: Copolymers of aniline and o-phenylenediamine / kaolinite composites were synthesized by 5:1 molar ratios of the respective monomers with different percentages of nanoclay via modified in situ chemical co-polymerization. The results were verified by measuring the FT-IR and UV-vis absorption spectra for PANI-o-PDA / kaolinite composites. The thermal behaviour of the copolymer and composites was studied. PANI-o-PDA / kaolinite composites were thermally more stable than pure copolymer. Surface morphology of copolymer composites was recorded at different magnification power by SEM which revealed whitish micrometric beads distributed all over the field with particle size in the range of 0.122 μm to 0.233 μm. This work demonstrates that

Nano-composite plastics and carbon nanotubes have been utilized for industrial and consumer packaging, the later offering an improved packaging solution for electronics components by making the materials used lighter and stronger. Nano-porous silica is a high porous, low-density solid material that supports various temperatures making it a great insulation product that can be applied in a wide range of fields from pipe insulation to refrigerators and even microelectronics. Nanoparticle based colloids are employed in the manufacturing of sunscreens, paints, and printer inks and nano-coatings can be applied in order to obtain scratch resistant surfaces. Composite nano-materials can be considered the basis for all the other current and future commercial applications of nanotechnology.

-If the copper metal is submerged in the silver nitrate solution then in reaction, a pure, solid (Ag) silver product is created with an excess of (Cu (NO3)2) copper (II) aqueous liquid because a single displacement reaction occurs where the balance equation is then

"Silver Chloride (AgCl) - Properties and Applications." Silver Chloride (AgCl) - Properties and Applications. The A to Z of Materials, 2013. Web. 18 Feb 2014. <http://www.azom.com/article.aspx?Articl

In the lab you must first dissolve the alloy in nitric acid; if the allot doesn't completely dissolve it may cause some error in your final result because not all of your silver ions were dissolved. You then must make a solution of distilled water added with sodium chloride. Once you calculate the amount of sodium chloride needed you must double the amount for the experiment to push the reaction to a full completion. This essentially should precipitate all of silver and none of the copper. No accurate balance is needed to measure out the sodium chloride because as long as you have an excess of

Several attempts have been made to improve the properties of PLA. Researchers have approached surface modifications to enhance the mechanical properties, especially toughness, processability, degradation behaviour and crystallization11. By the use of surface modification techniques different reactive groups such as –COOH, -OH, and –NH2 can be introduced on the surface of PLA. Grafting technique was utilized by Spinella et al.12, to improve the mechanical and barrier properties of the nanocomposites. PLLA based nanocomposites with PMMA modified CNCs showed higher storage modulus

In order to explore novel physical properties and phenomena and realize potential applications of nanostructures and nanomaterials, the ability to fabricate and process nanomaterials and nanostructures is the first corner stone in nanotechnology. There exist a number of methods to synthesize the nanomaterials, which are categorized in two techniques “top down and bottom up”. Solid state route, ball milling comes in the category of top down approach, while wet chemical routes like sol-gel, co-precipitation, etc. come in the category of bottom up approach. Secondly, characterization of nanomaterials is necessary to analyze their various properties. Therefore, this chapter describes the various methods of synthesis and characterization of nanomaterials. Characterization techniques include XRD, SEM, TEM, EDAX, UV-Visible spectroscopy, FTIR spectroscopy, etc.

It has an attractive shiny appearance, although it discolours easily. Silver (Ag), chemical element, a white shiny metal valued for its attractive beauty and electrical conductivity. Silver is period 5 of the periodic table, between copper and gold, and its physical and chemical properties are halfway between those two metals. It is used for jewellery, mirrors, coins and silver tableware, where appearance is important. Mirrors are almost always if not always made with silver, as researchers have proved that it is the best reflector of visible light. As a result of the continually growing demand for the precious white metal is a big indicator for the future price to increase dramatically. One of many developing fields is silver nanoparticles of technology, that is producing demand for silver that is still not yet fully priced into our current market. Silver is the most important valuable metal after gold and in fact silver has no equal. Which brings us to our next topic, when it comes to conducting electricity and/or heat, silver is the only way to go. As we previously stated before, it is the best and most efficient reflector of light. Silver is widely considered as the primary choice for growing range of technologies, due to its characteristics such as its antimicrobial properties (antimicrobial is an agent that kills microorganisms or stops their growth) (En.wikipedia.org, 2018). The first mass-market use of silver was photography aside from money and jewellery. Technology utilities the conductivity of silver and has made a huge demand in the manufacture of solar energy panels. One of the newest science fields are also creating potentially significant demand for silver along with the technology utilities. A nanoparticle is a submicroscopic size unit, measuring between 1-100 nanometres. Silver nanoparticles have numerous uses in medicine and technology. Silver is one of the most

Silver compounds were used in external preparations as disinfectants, including both silver nitrate and silver proteins, which can be used in dilute solution as a drop to prevent conjunctivitis in neonates. Silver nitrate is also sometimes used as a treatment for certain skin diseases in the solid image as a caustic agent for the treatment of certain skin diseases such as corn and pimples. Silver is also used in prostheses, reconstructive orthopedic surgery and heart organs. Silver duramine fluoride appears to be an effective factor in reducing dental caries. Silver acetate is used as an aid to help quit smoking

The influence of gamma irradiation on the electrical and dielectric properties of AgNO3/ PVA films was investigated. The films were prepared by casting techniques, then irradiated with different gamma doses (25, 50, 75, 100, 125 KGy). The content of the Ag in the PVA film were determined by using atomic absorption spectroscopy (AA), and were found to be 0.4 wt %. The films have been characterized through dielectric spectroscopy and I–V measurements. As a result, the dielectric constant (ε) value decreases as the gamma irradiation doses increase. The conductivity of the films and dielectric loss (tan δ) of increases with increasing the gamma irradiation doses. The conductivity was found (σ = 4.9 x10−8 S m−1) for 125 KGy. Frank-poole emission is the prevailing transport mechanism for all samples.

The characteristics of the disc surface affect the flow patterns generated on the film as well as the residence time of the reactants film. The effect of disc texture on particle characteristics is depicted in Figure 7 and Figure 8. It can be seen that using the grooved disc surface results in smaller particle size and narrower particle size distribution as compared to smooth disc surface. A narrow particle size distribution for the production of silver nanoparticles was achieved by Iyer et al.[43] using the grooved disc. The authors postulated that that the corrugated nature of the grooved disc promoted shear induced micromixing of the thin film on the disc at higher rotational speed. The efficient micromixing ensured that all the particles were exposed to the similar conditions to maintain a narrow size distribution [43]. Similar enhancement effects of grooved surfaces have been reported for styrene polymerisation in the SDR [9]. It has also been suggested in the literature that surface textures have the potential to suppress liquid channelling or rivulet flow compared to a smooth surface under identical conditions of liquid flowrate and liquid properties so that a higher wetted area is achieved [44]. Rivulet flow as opposed to film flow would result in larger average film thicknesses which may lead to detrimental performance, especially under strictly laminar flow conditions (i.e. where any surface wave-induced turbulence is absent). Thus, the intensifying effects of the

In the present work, PVA-Ag nanocomposite films with thickness 0.18 mm, constant silver content (0.4 wt. %) and different time of reactions (0.1, 3, 5, 7, 9 h) were prepared by chemical reduction methods. Structure, surface topology, photoluminescence and electrical properties of PVA-Ag nanocomposite were studied using x-ray diffraction (XRD), electrometer, atomic force microscope (AFM) and photoluminescence (PL) spectroscopy were used to characterize the prepared nanocomposites. X-ray patterns showed the existence of Ag-nanoparticles within the PVA polymeric matrix with face centered cube (FCC) phase. It was found that the root mean square (RMS) roughness decrease with increasing the time of reaction. While PL intensity at 427 nm increase as the time of reaction is increased. Frank-poole emission is the prevailing transport mechanism for all samples.

In the present work, PVA-Ag nanocomposite films with thickness 0.18 mm, constant silver content (0.4 wt. %) and different time of reactions (0.1, 3, 5, 7, 9 h) were prepared by chemical reduction methods. Surface topology, optical and electrical properties of PVA-Ag nanocomposite were studied using absorption spectroscopy, electrometer, atomic force microscope (AFM) and photoluminescence (PL) spectroscopy were used to characterize the prepared nanocomposites. Optical absorption coefficient studies showed a peak at 427 nm for all samples, in addition to the peak at 200 nm for undoped PVA film. There is observable change in the absorbed intensity at 427 nm with the time of reaction. The refractive index was found increase with increasing the time of reaction. It was found that the root mean square (RMS) roughness. Frank-poole emission is the prevailing transport mechanism for all samples. While PL intensity at 427 nm increase as the time of reaction is increased.