Copper Silver Core Shell Nanoparticles Dispersion (AgCu, Purity: 99.99%, Diameter: 50nm)

Typical Properties
CAS	11144-43-7
Catalog	ACM11144437-2
Molecular Weight	171.41 g/mol
Purity	99.9 %
Appearance	Liquid
Storage	5-30 °C
Color	Orange
Composition	AgCu
Concentration	100 ppm
Diameter	50 nm
pH	7
Precautions for use	Directly mix this material with other aqueous or aqueous solutions, and simply stir to achieve uniform mixing. Mixing within 5-30 degrees Celsius is recommended.
Quality Level	200
Shipping	Ambient Temperature
Solvent	Organic Solvent (DMF), IPA Ethanol, Water (ddH23O)

Overview

Description

This product is a highly dispersed nano-silver-copper bimetallic alloy hydrosol. It uses polymer material as a stabilizer and can be diluted for different antibacterial purposes. The particle size of the colloidal nano silver copper is between 1-7 nm, the average particle size is 3-5 nm, and the antibacterial concentration is less than 1 ppm. Can be diluted with purified water to any concentration of liquid (distilled water or deionized water above 15M ohms). It can also be added to aqueous or water-soluble liquids to achieve the purpose of antibacterial and sterilization. Nano-silver-copper bimetallic alloy is a new type of antibacterial material. Compared with traditional nano-silver material, its antibacterial concentration can be reduced by 3-5 times, and the amount of precious metal silver can also be reduced. Nano-silver copper has better antibacterial properties for fungi. Antibacterial and bactericidal ability is one of the materials to replace nano silver in the future.

Features

·Evenly dispersed, small particles
·Good compatibility, easy to disperse, easy to add a variety of systems
·Good system stability, reliable performance, safety and environmental protection
·High specific surface area, high loading, easy surface functionalization

Application

·Long-lasting disinfection and sterilization spray additive
·Antibacterial and bactericidal coating
·Other antibacterial material additives

Case Study

Synthesis and Antibacterial Application of Chitosan-Supported Core-Shell Copper-Silver Nanoparticles

Mallick S, et al. RSC Advances, 2015, 5(16), 12268-12276.

Bimetallic nanoparticle composites composed of silver nanoparticles (Ag NPs) and copper nanoparticles (Cu NPs) generally have greater advantages than single metal nanoparticles. Chitosan (CS)-supported core-shell copper-silver metal nanoparticles (CS-Cu@Ag NPs) were successfully synthesized via a two-step seed-mediated method. The CS-Cu@Ag NPs composite showed enhanced antibacterial activity against Gram-negative Escherichia coli and Gram-positive Bacillus cereus.
Synthesis of core-shell CS-Cu@Ag NPs
· The growth of CS-Cu@Ag NPs was achieved using the seed-mediated growth method. Cu NP seeds were prepared through a recently published method which involved the reduction of CuSO4 with hydrazine hydrate in the presence of CS as a stabilizer.
· Subsequently, 0.6 mL of 0.02 M AgNO3 solution was added to a 30 mL Cu NP seed dispersion and stirred for 12 hours at room temperature.
· The resulting orange reddish solution was then centrifuged at 20,000 rpm, the pellet washed with Milli-Q water, and re-dispersed in 30 mL of water containing 0.25% (v/v) acetic acid.
· Prior to bactericidal experiments, the pH of the composite solution was adjusted to 6.3 to facilitate better dispersion of the CS-Cu@Ag NP composite in the bacterial medium.

Synthesis of Cu@Ag Core-Shell Nanoparticles for Nonlinear Optical Application

Sakthisabarimoorthi A, et al. Journal of Materials Science: Materials in Electronics, 2017, 28, 4545-4552.

A well-coated Cu@Ag core-shell nanoparticles (NPs) through facile synthesis route using simple redox-trans-metalation process at room temperature. The resulting Cu@Ag product was completely shaped as core-shell structure. The nonlinear optical response of Cu@Ag core-shell nanoparticles was studied using a continuous wave He-Ne laser and it was found that they have a larger nonlinear refractive index compared to Ag nanoparticles.
Preparation of Cu@Ag core-shell NPs
· The Cu NPs were prepared by a procedure wherein sodium borohydride and povidone are used as reducing agent and surfactant respectively.
· In a typical synthesis route, 5 mL of 2.5 mM PVP was added to a 5 mL of 0.02 M CuSO4 solution and the resultant solution was stirred for 10 min to ensure they wholly dissolved.
· Then, when 1% of 0.02 M NaBH4 was poured into the prepared solution, the color of the solution changed from colorless into a transparent yellow due to the formation of copper NPs.
· Subsequently, 5 mL of freshly prepared 0.02 M AgNO3 was slowly injected into the mixed solution and allowed to complete the reaction for several minutes.
· When the first drop of the silver salt was added to the solution, redox-transmetalation process commenced and the silver ions are reduced by the copper atoms directly and deposited on its surface. Finally, the resultant Ag coated Cu products were washed several times with ethanol and deionized water.