Abstract
We designed a portable direct-current (DC) jet sterilizer that discharges self-excited plasma through a needle-rectangular loop sterilizer. The device is sized ∅ 30 mm × 40 mm. The tungsten needle is connected to the high voltage source and to the copper rectangular loop with earthing wire. Under high-voltage DC (±9.6 kV) at atmospheric pressure, the plasma jets killed Escherichia coli and Staphylococcus aureus in the absence of an externally connected carrier gas. Under the same conditions, the E. coli and S. aureus were destroyed after 90 s and 120 s respectively by the positive plasma jet, and after 120 s and 150 s respectively by the negative plasma jet. Thus, the sterilization efficiency of the positive plasma jet exceeds that of the negative plasma jet.
Highlights
The rapid development of modern medical technology has increased the stringency and applicability range of sterilization and disinfection
The E. coli and S. aureus were destroyed after 90 s and 120 s respectively by the positive plasma jet, and after 120 s and 150 s respectively by the negative plasma jet
The sterilization efficiency of the positive plasma jet exceeds that of the negative plasma jet
Summary
The rapid development of modern medical technology has increased the stringency and applicability range of sterilization and disinfection. Low-temperature plasma jets operating at atmospheric pressures maintain a gas temperature comparable to room temperature, without damaging the medical devices, degrading the body tissues or polluting the environment.. Low-temperature plasma jets operating at atmospheric pressures maintain a gas temperature comparable to room temperature, without damaging the medical devices, degrading the body tissues or polluting the environment.5 Such a technique would overcome the shortcomings of the above methods. Wang et al deactivated a Newcastle disease virus and an avian influenza virus by a non-thermal plasma (NTP) jet operated by an alternating current at atmospheric pressure for vaccine preparation. Driven by a high-voltage direct current (HVDC) under atmospheric pressure, the self-excited plasma jet of this device destroys E. coli and Staphylococcus aureus cells without requiring a carrier gas. Our design adopting PCB design avoids the large size and high power consumption of previously proposed devices
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
