Hongwu International Group Ltd.

We, Hongwu International Group Ltd, are offering different shape & size Nanoparticles, Nanopowders, Nanowires, Micropowder,Surface Coating, Dispersion for pure silver powder series material.

Silver nanoparticle, extra-fine grade from 20nm to 20um,customized.Ensure reliability and reproducibility of the results with 99.99 pure silver powder.Our Silver nanoparticles is new and freshly prepared. The powder is packaged in clear double layer antistatic bag.

In addition to the powder form, we also provide wet silver powder with deionized water for avoiding the occurrence of agglomeration.we know that for tens of nanoscale powder, Fan Dehua forces and electrostatic forces between the particles present in the particles bonded into a group, known as soft agglomerates, the smaller the particle, the more significant agglomeration, upon application of improper handling will cause irreversible hard agglomerates, especially it is not suitable for precision fine-line printing.

Our Silver nanoparticle is available in a wide range of quantities and specifications to meet your particular industrial or scientific application. For further technical information or pricing on Silver powder

silver nanoparticles properties:
Powder, Dispersions, Functionalized Spherical,In Business since 2002,Full Consultancy Services
solid or liquid form: Dry pure silver powder, and wet nanosilver
Particle size is approximately 20 nano to 20 microns.
Mophology: Spherical,nanowire,flake and dendritic(flake and dendritic mainly for micron grade silver powders)
Nano sized Silver Powder has been known to kill germs,and micron sized silver powder known to be conductive
Non toxic.
Not impact sensitive.
Will not explode or ignite when struck between heavy objects.

silver nanoparticles color:
the different particle size own diverse color,for example,black 20nm silver powder,brown yellow sub-micron silver powder,silver grey 1um flaky silver powder and 5um shiny silver powder,etc.

silver nanoparticles applications:
Used by Biologists to study the germicidal effects (HW-A110).
Used by Artists to plate silver oil for a beautiful color(HW-B117).
Used by engineers as good conductive material, such as solar cell cathode silver powder(HW-B115),conductive coating,conductive pastes,conductive inks and fillers.
Used by Scientists in research
Used as optical material,silver nanoparticles are used to efficiently harvest light and for enhanced optical spectroscopies.
More use:catalysts,EMI/RFI shielding material,etc.

If you want to buy silver nanoparticles,our experienced and dedicated team is ready for help. Do not hesitate to contact us at hwnano@xuzhounano.com

Related reading:nano silver powder for sale     buy nano silver powder

Nanometer silver powder is added in the flake silver powder on the influence of conductive colloid volume resistivity

Nanometer silver powder is added in the flake silver powder on the influence of conductive colloid volume resistivity

1. With high density and high integration of the rapid development of the miniaturization of electronic components, miniaturization and the printed circuit board, conductive adhesives because the process is simple, easy operation, high line resolution and less environmental pollution and other advantages become Alternative tin solder, an ideal choice for conductive connection. Conductive paste made of conductive filler, gum base, diluents, tougheners and other additives, wherein the conductive filler of the volume resistivity of the conductive adhesive plays an important role.

2. In practice, a good contact with the conductive filler in order to form a conductive path, in order to achieve this, people try to add a flake, needle or fibrous conductive filler. However, under a transmission electron microscopy revealed: complete conductive gel particles and particle contact and a continuous linear conductive paths there are actually very few particles more than a small gap, this part of the particle is to “tunneling” to obtain a conductive a. Order by “tunneling” to get better conductivity, the distance between the particles must be less than 10 nm, we therefore had to add nano silver in silver flake ideas and research.

3. The results, at a 5% mix of nano silver powder, nanometer silver powder evenly dispersed between silver flake play a very good connection, and improve the conductivity of silver; and the addition of 10% nanometer silver powder mixed powder, many nano-silver reunited increase body resistance between silver.

4. Adding different content of nano-silver powder into flake silver made into conductive adhesive formulated after conducting were studied. Nano silver powder were added at 5% and 10% added to the silver flake, and made of different conductive plastic silver content measured volume resistivity. The results obtained by experimental comparison: 5% nano silver powder mixing ratio of 10% of the mixed powder dubbed nano-silver conductive paste low volume resistivity, good conductivity. The possible reasons are: flow through when approaching a threshold, silver flake still not well connected, adding a small amount of nano powders can help build a conductive network to reduce the volume resistivity; once form a connection, the nano silver particles will increase between the contact resistance.

5. Add different proportions of nano silver in silver flake will change the conductivity thus obtained conductive paste, nanometer silver powder is added generally increases the volume resistivity of the conductive adhesive. However, near the “cross-flow threshold”, the amount of nano-silver is added to form a conductive path; it can reduce the volume resistivity of the conductive adhesive. This study shows that when nano-silver increased amount of 5%, the volume resistivity decreased obviously, silver content of 75% volume resistivity as low as 1.6 × 10-4Ω • cm.

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Silver or Silver Nanoparticles

Gold nanoparticles have good stability, small size effect, surface effect, an optical effect and unique biological affinity, in many areas show a potential application, aroused great interest in science and technology workers, scientists have synthesized a silver (Ag) nanocluster that is virtually identical to a gold (Au) nanocluster. On the outside, the silver nanocluster has a golden yellow color, and on the inside, its chemical structure and properties also closely mimic those of its gold counterpart. The work shows that it may be possible to create silver nanoparticles that look and behave like gold despite underlying differences between the two elements, and could lead to creating similar analogues between other pairs of elements.

The researchers, led by Osman Bakr, Associate Professor of Materials Science and Engineering at King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, have published the paper in a recent issue of the Journal of the American Chemical Society.

“In some aspects, this is very similar to alchemy, but we call it ‘nano-alchemy,'” Bakr told Phys.org. “When we first encountered the optical spectrum of the silver nanocluster, we thought that we may have inadvertently switched the chemical reagents for silver with gold, and ended up with gold nanoparticles instead. But repeated synthesis and measurements proved that the clusters were indeed silver and yet show properties akin to gold. It was really surprising to us as scientists to find not only similarities in the color and optical properties, but also the X-ray structure.”

Like all chemical elements, silver and gold are defined by their number of protons: silver has 47, and gold has 79. The work here doesn’t change the number of protons in an atom of silver; otherwise it would no longer be considered silver. Instead, the researchers synthesized a nanocluster of 25 silver atoms, along with 18 other molecules called “ligands” that surround the silver atoms. The entire negatively charged, silver-based complex ion has the chemical formula [Ag25(SPhMe2)18]-.

Although a few other silver nanoparticle have been synthesized in recent years, this is the first silver nanocluster that has a matching analogue in gold: [Au25(SPhMe2)18]- has previously been reported. Besides both nanoclusters having 25 metal atoms and 18 ligands, they also both have all of their atoms and electrons arranged in almost exactly the same way.

In their study, the researchers performed tests demonstrating that the silver and gold nanoclusters have very similar optical properties. Typically, silver nanoclusters are brown or red in color, but this one looks just like gold because it emits light at almost the same wavelength (around 675 nm) as gold. The golden color can be explained by the fact that both nanoclusters have virtually identical crystal structures.

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How Using Gold Nanoparticles Develop Novel Nanosurgery Technique?

Nanotechnology in today’s society are more and more mature, the future development of new technologies provide a higher standard of living, the scientists are trying hard to explore new areas. A research team led by Professor Michel Meunier from the Polytechnique Montréal has developed a novel transfection technique using gold nanoparticles and a femtosecond laser to change cancer cells’ genetic material.

In this technique, silver nanoparticle and gold nanoparticles are deposited on the cells to concentrate the laser energy and enable it conduct a nano-scale surgery in a highly accurate non-invasive manner. This method is capable of changing the gene expression in the cancer cells to slow down their movement, thus preventing metastases formation. This pioneering achievement in nanosurgery paves the way to advance cancer treatments and other innovative medical applications.

This technique is a promising replacement for traditional cellular transfection techniques like lipofection. In the experiment on malignant human melanoma cells, this method showed an optoporation efficacy of 70% and a transfection performance three folds better than that of lipofection treatment. Moreover, contrary to traditional treatments that destroy the cells’ physical integrity, the novel technique ensures cellular viability with below 1% of toxicity.

This significant scientific advancement opens the door to develop promising applications such as novel therapeutic methods in cardiology, neurology, and oncology. The Polytechnique Montréal team works in partnership with scientists from the Department of Medicine at the McGill University Health Centre.

This project is funded by the Deutsche Forschungsgemeinschaft, the Canadian Institutes of Health Research, the Canada Research Chairs program, the Canada Foundation for Innovation, and the Fonds Québécois de la Recherche sur la Nature et les Technologies.

The research team has reported their findings in the journal Biomaterials.

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