The company Nanox is developing in collaboration with the CDMF of Brazil and the UJI a plastic film to protect surfaces against COVID-19



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## The company Nanox is developing in collaboration with the CDMF of Brazil and the UJI a plastic film to protect surfaces against COVID-19

08/01/2021 |
SCP

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CDMF, in partnership with Nanox, Universitat Jaume I (UJI), in Spain, and the Institute of Biomedical Sciences of the University of São Paulo (ICB-USP), developed a pioneering research technology in the world that proved the effectiveness of nanoparticles silver and silica produced at the Center in the inactivation of the new coronavirus (SAERS-Cov-2).  
  
The work proved the action of particles in the inactivation of SARS-Cov-2 on surfaces such as fabrics, masks, hospital equipment, among others, and their use in these materials has become an important tool in combating the pandemic of COVID - 19.  
  
The new particles have already been applied in the reusable OTO mask, currently in production by ELKA, and more recently in fabrics and allowing a wider range of applications including Personal Protective Equipment (PPE) and clothing for hospital use.  
  
An adhesive plastic film was also developed to protect surfaces, such as door handles, handrails, elevator buttons and touch screens that are capable of inactivating the new coronavirus by contact. Launched by the Promaflex industry, the material has silver and silica microparticles incorporated into its structure, developed by the company Nanox, supported by the FAPESP Innovative Research in Small Business Program (PIPE). In tests carried out at the level 3 biosafety laboratory (NB3) of the Institute of Biomedical Sciences of the University of São Paulo (ICB-USP), the polyethylene-based material has been shown to be able to eliminate 99.84% of SARS-CoV particles -2 after two minutes of contact. Gustavo Simões, co-founder and CEO of Nanox Tecnologia, investigates the bactericidal and fungicidal effects of silver nanoparticles since his doctorate, under the guidance of Professor Elson Longo.  
  
**Pioneering**  
  
These innovations were possible during the pandemic due to the knowledge accumulated by research developed at CDMF 14 years ago with silver and silica nanoparticles. “When the new coronavirus arrived, the technology was already developed to kill bacteria and viruses”, explain Elson Longo, Professor Emeritus at UFSCar and director of CDMF and Juan Andrés, Full Professor at UJI.  
  
The virus dies due to an oxidation process. “Organic chemistry is generally used in processes to remove fungi and bacteria. But the team looked for another way, inorganic chemistry, combined with semiconductors. With silica and metallic silver, there is a plasmonic effect of silver, ”said Juan Andrés, from UJI.  
  
This phenomenon can absorb electrons or supply electrons easily. “We saw that semiconductors had a great capacity to break down the water molecule, forming a hydroxide radical and a proton. On the other side, there is an electron for oxygen, which forms a peroxide ion and absorbs that proton and forms a peroxide radical. This peroxide radical and the hydroxide radical oxidize bacteria, fungi and viruses ”, he explains.

**Report: José Angelo Santilli**

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