What are the disadvantages of silver nanoparticles?

What are the disadvantages of silver nanoparticles?

The researchers found that silver nanoparticles had a toxic effect on cells, suppressing cellular growth and multiplication and causing cell death depending on concentrations and duration of exposure.

Can silver nanoparticles cause cancer?

Silver nanoparticles selectively induce human oncogenic γ-herpesvirus-related cancer cell death through reactivating viral lytic replication.

Are silver nanoparticles toxic?

Silver nanoparticles are frequently touted as being highly effective as antimicrobial agents while being nontoxic to mammals. However, numerous in vitro studies have demonstrated the toxic effects of Ag NPs on rat liver (BRL3A) and neuronal cells [58,59], human lung epithelial cells [60] and murine stem cells [61].

How do you stabilize silver nanoparticles?

Spherical morphology for silver nanoparticles (Ag NPs) stabilized with dithiocarbamate (DTC) by reducing silver nitrate with sodium borohydride was obtained, while the addition of sodium citrate and hydrogen peroxide allowed the formation of silver nanotriangles (Ag NTs).

How does silver effect the human body?

Besides argyria and argyrosis, exposure to soluble silver compounds may produce other toxic effects, including liver and kidney damage, irritation of the eyes, skin, respiratory, and intestinal tract, and changes in blood cells. Metallic silver appears to pose minimal risk to health.

How are silver nanoparticles made?

The synthesis of silver nanoparticles by sodium borohydride (NaBH4) reduction occurs by the following reaction: Ag+ + BH4− + 3 H2O → Ag0 +B(OH)3 +3.5 H. The reduced metal atoms will form nanoparticle nuclei. Overall, this process is similar to the above reduction method using citrate.

Why do people disagree with using silver nanoparticles?

Silver has antibacterial properties. Nanoparticulate silver is used in some dressings for wounds. Suggest a possible hazard to the environment of silver nanoparticles. The silver nanoparticles could harm or kill useful bacteria in the environment when these dressings are thrown away after use.

How do you know if silver nanoparticles are stable?

The long-term stability of colloidal Ag nanoparticles was monitored spectroscopically by zeta potential technique, which indicates the changes in surface charge with time. Such method is widely used to control the stability of colloidal metal nanoparticles.

How do you make silver nanoparticles?

The synthesis of cubic silver nanoparticles was achieved by the reduction of silver nitrate using ethylene glycol in the presence of polyvinylpyrrolidone (PVP). In polyol process, ethylene glycol containing hydroxyl groups have functional structure as both solvent and reducing agent.

Why is nanosilver bad?

A new study from the University of Southern Denmark shows that nano-silver can penetrate our cells and cause damage. Silver has an antibacterial effect and therefore the food and cosmetic industry often coat their products with silver nanoparticles.