In yet another milestone, Plasmacluster Technology Demonstration Effectiveness in Reducing Airborne Novel Coronavirus (SARS-CoV-2), a World’s First.

For the first time in the world, a device, developed by Sharp Corporation, equipped with Plasmacluster technology, which exposed an airborne novel coronavirus (SARS-CoV-2) to Plasmacluster ions for approximately 30 seconds, has effectively reduced the infectious titer of the virus by more than 90%. This achievement was accomplished in collaboration with Professor Jiro Yasuda of the National Research Center for the Control and Prevention of Infectious Diseases/Institute of Tropical Medicine, Nagasaki University, Professor Asuka Nanbo (a board member of the Japanese Society for Virology) of the same institution, Professor Hironori Yoshiyama of the Department of Microbiology, Shimane University, Faculty of Medicine (also, a board member of the Japanese Society for Virology), and Nagasaki University, an internationally respected authority on infectious diseases research.

The outbreak of Coronavirus disease (COVID-19) caused by the novel coronavirus (SARS-CoV-2) was first reported in December 2019. By August 2020, this disease had already infected more than 25 million people and taken the lives of 840,000 individuals globally. This outbreak is an emergency faced by our society and made it necessary to take immediate countermeasures across a wide range of fields.


Excerpts from the Expert

“Dr Jiro Yasuda, Professor of National Research Center for the Control and Prevention of Infectious Diseases, Nagasaki University said, “Disinfectants such as alcohol and detergents (surfactants) are well-known to be effective to reduce the risk of the virus on materials. However, for infection via aerosols (micro-droplets), there are few effective countermeasures such as a mask. Today, we demonstrated the effective inactivation of SARS-CoV-2 in airborne droplets by using Plasmacluster technology. We expect it would be useful to reduce the risk of infection in real spaces like offices, homes, medical facilities and vehicles too”.
Dr. Jiro Yasuda

Professor: National Research Center for the Control and Prevention of Infectious Diseases Nagasaki University.

The Verification Test: An Overview

Testing Organization:

National Research Center for the Control and Prevention of Infectious Diseases (CCPID)/Institute of Tropical Medicine, Nagasaki University

Verification Test Apparatus:

Virus testing device equipped with Plasmacluster technology

Concentration of Plasmacluster ion:

Approx. 10 million/cm3 (in the vicinity of the Plasmacluster ion generator)

Test space Volume:

Approx. 3 litres

Conducting the Test/Study:

Comparison using the device described above without Plasmacluster ion generation
Validation virus: Novel Coronavirus (SARS-CoV-2) Test method
  • 1) The aerosolized virus is made to pass through the test device of the generator.
  • 2) The aerosolized virus components are recovered post exposure to Plasmacluster ions.
  • 3) The infectious virus titre of the recovered virus solution gets calculated by a plaque assay*.
  • * A standard assay to evaluate the number of infectious virus in the sample.
Test Result

Table 1.

Effect of Plasmacluster ions on infectious titer of novel coronavirus (SARS-CoV-2) suspended in air

About Plasmacluster Technology

Plasmacluster ions are positive and negative ions that occur in nature. These positive and negative ions instantaneously bond with the surface of airborne bacteria, fungi, viruses, allergens, etc. becoming OH (hydroxyl) radicals which have a very high oxidizing power. Plasmacluster is air-purifying technology. Its effectiveness has been supported by test data, and Plasmacluster is thus increasingly finding applications in various areas of activity, such as in businesses, in addition to household use. Plasmacluster provides you with natural and safe air. This unique technology from Sharp applies the power of nature.

Plasmacluster Mechanism to Remove Microbes

How Plasmacluster Ions are generated

Positive and negative voltages are applied to discharge electrodes to electrically split airborne water and oxygen molecules into hydrogen and oxygen. This creates positively charged hydrogen ions (H+) and negatively charged oxygen ions (O).

How these ions inhibit the activity of airborne bacteria

Plasmacluster Ions inhibit activity by cleaving proteins on the cell surface, thereby damaging the cell membranea.

Sharp’s Plasmacluster technology- A simple chronology
Since 2000

To demonstrate the effectiveness of Plasmacluster technology, Sharp has promoted multiple academic marketing sessions. To achieve this, they have worked in collaboration with independent third-party research organizations across the globe. Numerous research organizations have proven its clinical efficacy in suppressing the activity of harmful substances that includes the likes of new pandemic influenza viruses as well as drug-resistant bacteria and mite allergens. It’s also found to be very effective in reducing bronchial inflammation levels in children with asthma. These ions have also been certified as safe.

Year 2004

Back in the day, Sharp demonstrated the efficiency of Plasmacluster technology against feline (cat) Coronavirus, a member of the Coronaviridae family. The following year Sharp also demonstrated its effectiveness against the original SARS Coronavirus (SARS-CoV), which was widespread around 2002-03 and was genetically similar to the novel Coronavirus (SARS-CoV-2)..

December 2019

An outbreak of “Coronavirus disease 2019 (COVID-19)” caused by a novel Coronavirus (SARS-CoV-2) strand was reported. By August 2020, more than 25 million people were infected. The list of fatality was over 840,000 around this period. This outbreak represents an urgent problem that the society is facing, and demands immediate countermeasures.

Now that Sharp has demonstrated its effectiveness against SARS-CoV-2 in airborne droplets it makes us hopeful that we will see some positive outcomes in the near future. We will continue to contribute to the world by conducting a wide range of studies to fully comprehend the effectiveness and potentials of the Plasmacluster technology.

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