Silver is Moon metal, cold light, one of the 3 base metals in Alchemy.
Properties of silver have its Moon nature. Throughout human history, silver has been known and used by many cultures as a metal with magnificent properties. Silver used esoteric, in alchemy, human culture, and new science. Silver has a very long history of use in medicine. It is a metal of atomic number 47, which requires darkness for its reactions. A photographer needs darkroom in his studio to work with this metal. The silver images of photography are only in black white and gray. In photography, it creates images of a memory of the past, in mirrors it gives an image of what is at present.
Today, most mirrors are made of coating glass with silver. When looking at a mirror we never feel we are looking at a sheet of silver. Silver nanoparticles of less than 100 nm in diameter are currently increasing interest for the wide range of applications in various fields of domains. Magnificent nanoparticle dimensions, a high surface area, a quantum confinement and other interesting effects.
Image. Silver coated glass or mirror.
Discoveries in the past decades have clearly shown that the electromagnetic, optical and catalytic properties of silver nanoparticles are strongly influenced by shape, size and size distribution and chemical-physical environment. Commonly used are spherical silver nanoparticles but diamond, octagonal and thin sheets are also popular. Silver nanoparticles have a high surface area per unit mass and release a continuous level of silver ions into their environment. Nanoparticles are clusters of atoms in the size range of 1–100 nm. There is a various synthesis of silver nanoparticles physical, chemical, and biological methods. Mild silver protein. This product chemically binds microscopic particles of silver to a protein molecule. It is usually found in concentrations between 20-40 ppm. Its appearance may be transparent-clear or yellow amber.
Silver nanoparticles concentrations between 20-40 ppm, its appearance transparent-clear or yellow to amber.
Nano particle size plays a big role in the efficacy of silver nanoparticles. However smallest does not mean best in this case. Research papers in the scientific documents, which show that, silver nanoparticles and not ionic silver is very effective against a wide range health applications. All of these papers show the effective size in the range of 10 to 20 nanometers in diameter. There are also research documents shows those particles smaller than this range become toxic to healthy human cells. Solutions with 14 nanometer particles are clear yellow in color. At higher ppm, the 14nm particles appear brownish in color. At slightly larger size, the color shifts slightly to orange, and at slightly smaller size, it shifts very slightly to having a green tint. Clear colloidal silver is toxic and will cause argyria, the blue discoloration of the skin. The conclusion is that particles sizes in the 10 to 20 nanometer size range are optimum for safety and effectiveness against pathogens. Larger particles are less effective, and smaller particles are toxic to healthy body cells. 14nm particles absorb blue light, leaving red and green, which the eye sees as yellow. So the color is determined by particle size.
Silver nanoparticles have unique properties, which helps in molecular diagnostics, in therapies, as well as in devices that are used in several medical applications. The major applications of silver nanoparticles in the medical field include diagnostic applications and therapeutic applications. In most of the therapeutic applications, it is the antimicrobial property that is being majorly explored, though the anti-inflammatory property has its fair share of applications. The medical properties of silver have been known for over 2,000 years. Since the nineteenth century, silver-based compounds have been used in many antimicrobial applications. Nanoparticles have been known to be used for numerous physical, biological, and pharmaceutical applications. Silver nanoparticles are being used as antimicrobial agents in many public places such as railway stations and elevators and other public places, and they are said to show good antimicrobial action.
Image. Close up of silver nitrate crystals.
Silver nitrate solutions and other silver compounds are used as disinfectants and microbiocides. It is a well-known fact that silver ions and silver-based compounds are highly toxic to microorganisms which include 16 major species of bacteria. This aspect of silver makes it an excellent choice for multiple roles in the medical field. Silver is generally used in the nitrate form to induce antimicrobial effect, but when silver nanoparticles are used, there is a huge increase in the surface area available for the microbe to be exposed to. Though silver nanoparticles find use in many antibacterial applications. Silver ions are used in the formulation of dental resin composites, in coatings of medical devices, as a bactericidal coating in water filters, as an antimicrobial agent in air sanitizer sprays, pillows, respirators, socks, wet wipes, detergents, soaps, shampoos, toothpastes, washing machines, and many other consumer products, as bone cement, and in many wound dressings, remove dissolved chlorine from water. Colloidal silver is used to treat infections due to yeast; bacteria (tuberculosis, Lyme disease, bubonic plague, pneumonia, leprosy, gonorrhea, syphilis, scarlet fever, stomach ulcers, cholera); parasites (ringworm, malaria); and viruses (HIV/AIDS, pneumonia, herpes, shingles, warts). Though silver nanoparticles find use in many antibacterial applications. Silver ions are used in the formulation of dental resin composites, in coatings of medical devices, as a bactericidal coating in water filters, as an antimicrobial agent in air sanitizer sprays, pillows, respirators, socks, wet wipes, detergents, soaps, shampoos, toothpastes, washing machines, and many other consumer products, as bone cement, and in many wound dressings, remove dissolved chlorine from water. Colloidal silver is used to treat infections due to yeast; bacteria (tuberculosis, Lyme disease, bubonic plague, pneumonia, leprosy, gonorrhea, syphilis, scarlet fever, stomach ulcers, cholera); parasites (ringworm, malaria); and viruses (HIV/AIDS, pneumonia, herpes, shingles, warts).
Image. Silver Hydrogel with colloidal silver.
Though there are various benefits of silver nanoparticles, there is also the problem of nano-toxicity of silver. There are various works of literature that suggest that the nanoparticles can cause various environmental and health problems; though there is a need for more studies to be conducted to conclude that there is a real problem with silver nanoparticles. Silver nanoparticles to cause antimicrobial effect is still in studies and needs to be determined. Silver nanoparticles have the ability to stick to the bacterial cell wall and subsequently penetrate into a cell, by causing structural changes in the cell membrane and death of the cell. There is an accumulation of the nanoparticles on the cell surface. The formation of free radicals by the silver nanoparticles may be considered to be another mechanism by which the cells die. Incorporation of silver particles into plastics, composites, and adhesives increases the electrical conductivity of the material. Silver pastes and epoxies are widely utilized in the electronics industries. Silver nanoparticle-based inks are used to print flexible electronics. As many other different silver-based batteries have interesting benefits. Silver oxide batteries are widely used in electronic equipment that requires small, compact and effective power sources. Silver oxide button cells and their ability to deliver energy at relatively high current drains makes them ideal for miniature devices where space is considered. Silver oxide batteries are also extremely stable discharge voltage, and ability to operate in a different temperature range. Silver nanocoating is used modern electronics, natural dye photo sensing, and solar cells. The electrical conductivity of silver is the greatest of all metals, greater even than copper. Silver nano coating improves electrical conductivity because those currents tend to flow on the surface of conductors rather than through the interior.
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