Nano silver applied in the fields of biomedicine, optics, catalysis, and electronic devices

according toAdvanced Institute (Shenzhen) Technology Co., LtdAccording to the statistical report, as of now, the sales volume of nano silver series products has doubled compared to the same period last year. While the results are gratifying, we also found that the excellent performance of nano silver has not been fully utilized. The good conductivity, thermal conductivity, antibacterial performance, optical performance, and other special properties of nano silver will also be widely developed and applied. At present, nanosilver has been widely used in fields such as catalytic materials, optical materials, biomedicine, new energy, and electronic devices.

1. Application in antibacterial field

Inorganic antibacterial materialsNano metallic silverRecognized as an ideal antibacterial material, there are many successful cases in the fields of coatings, medical applications, water purification systems, textiles, plastics, rubber, ceramics, glass and other sterilization coatings, deodorization, and antibacterial film industries, thus opening up a broader market for the antibacterial application of nanosilver.

Compared with traditional silver based antibacterial agents, nano silver produced through nanotechnology not only has more significant antibacterial effects, but also has higher safety and longer lasting efficacy. As an antibacterial agent, nano silver has a large specific surface area and small particle size, making it easy to come into contact with pathogenic microorganisms and exert its maximum biological activity. Most nano composite materials used in antibacterial food packaging are based on silver nanoparticles, indicating their stronger antibacterial activity. Researchers added nano silver to non-woven fabric and tested its antibacterial performance. The results indicate that non-woven fabrics without immersion in nano silver do not have antibacterial properties, while non-woven fabrics immersed in a 500 ppm nano silver solution have excellent antibacterial properties. The polypropylene water filter with nano silver coating has a good inhibitory effect on Escherichia coli cells..

2. Application in catalysis

Nano silver has excellent catalytic activity and can be used as a catalyst for various reactions. Researchers have prepared Ag/ZnO composite nanoparticles using the method of photo reduction deposition of precious metals. Using photocatalytic oxidation of gas-phase n-heptane as a model reaction, the photocatalytic activity of the sample and the effect of precious metal deposition on catalyst activity were studied. The results indicate that depositing an appropriate amount of Ag in ZnO nanoparticles can significantly enhance their photocatalytic activity.

Using nano silver particles as catalysts, reduce p-nitrobenzoic acid. Research has shown that under the condition of adding nanosilver as a catalyst, the degree of reduction of nitrobenzoic acid is much greater than that without adding nanosilver. Moreover, as the amount of nano silver increases, the reaction rate becomes faster and the reaction becomes more thorough. Ethylene oxidation catalyst, supported silver catalyst for fuel cells.

3. Applications in conductivity

Nano silver has excellent conductivity, mainly manifested in the formation of conductive films with excellent surface conditions on nanoscale silver powder conductive tapes, thus maintaining low and stable resistance. Due to its excellent performance, nanosilver has a wide range of applications in the electronics industry.

By using chemical electroplating to coat a layer of nanoscale silver particles on the surface of sheet-like copper powder, nano silver coated copper powder was successfully prepared. Research on its conductivity showed that the addition of nano silver not only improved the conductivity of copper powder, but also overcame the disadvantages of copper powder being easily oxidized.

Nano silver particles were made by mechanical stirring and ultrasonic dispersion methodsNano silver conductive pasteHas good conductivity.

4. Applications in the field of optics

Nano silver can serve as a matrix to enhance Raman spectroscopy. Research has shown that using an appropriate amount of nanosilver with suitable electrical properties can obtain relatively strong Raman spectra (SERS), thereby expanding the scope of SERS research. In addition, the localized surface plasmon resonance scattering and absorption properties of silver nanoparticles enable the strong light scattering signal generated by the interaction between iodine and silver nanoparticles, which has potential applications in biochemical analysis and detection.

5. Applications in the field of biomaterials

Due to its various superior properties, nanosilver has broad prospects in the field of biomaterials, especially in the field of biosensors.

Researchers introduced silver gold nanocomposite particles into the immobilization technology of glucose oxidase (GOD) in glucose sensors. The experiment proved that the addition of these particles increased the adsorption capacity and stability of the enzyme while enhancing its catalytic activity, resulting in a significant improvement in the current response sensitivity of the enzyme electrode.

The excellent conductivity, thermal conductivity, antibacterial properties, optical properties, and other special properties of nanosilver make it increasingly applicable in the fields of biomedicine, optics, catalysis, and electronic devices. In the future, bimetallic nanomaterials formed by nanosilver and other metals will be a development direction for nanosilver.

It can be predicted that nanosilver will have a significant and far-reaching impact on the development and progress of human society. The application of nanosilver in fields such as medicine, biology, and environment will have a very broad development prospect.