Copper-Silver Nanohybrids: SARS-CoV-2 Inhibitory Surfaces.

Area of Science:

• Materials Science
• Nanotechnology
• Virology

Background:

• Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) poses a significant global health risk.
• Human-animal interfaces are critical for pandemic spread, necessitating effective containment strategies.
• Limited data exists on the contact-time efficacy of copper formulations against SARS-CoV-2 surfaces.

Purpose of the Study:

• To investigate the rapid surface inhibitory effects of copper-silver (Cu-Ag) nanohybrids against SARS-CoV-2.
• To determine the contact-time limit for SARS-CoV-2 inhibition on Cu-Ag nanohybrid surfaces.
• To assess the potential of Cu-Ag nanohybrids in breaking the SARS-CoV-2 transmission chain.

Main Methods:

• Characterization of Cu-Ag nanohybrids using transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX).
• Culturing methods to evaluate the antiviral efficacy of Cu-Ag nanohybrid surfaces against SARS-CoV-2.
• Testing inhibition at short contact times (1 and 5 minutes).

Main Results:

• Cu-Ag nanohybrids demonstrated efficient inhibition of SARS-CoV-2 within 1 and 5 minutes.
• Surfaces with high copper (~65-78 wt%) and lower silver (~7-9 wt%) content showed significant antiviral activity.
• Rapid contact-time inhibition was observed on characterized nanohybrid surfaces.

Conclusions:

• Cu-Ag nanohybrids exhibit rapid antiviral properties against SARS-CoV-2 on surfaces.
• These findings highlight the potential application of Cu-Ag nanohybrid surfaces to interrupt SARS-CoV-2 transmission.
• Potential applications include high-touch public spaces, hospitals, and livestock settings, pending further parameter control and toxicity evaluations.