Plasma-etched nanostructured anti-bacterial surfaces.
Technology could accelerate antimicrobial material development
The deepening concern over antibiotic-resistant infections, coupled with prevailing hospital-acquired infections from surgical tools, implants, and heavily touched surfaces, has ramped up antimicrobial material development in recent years.
Conventional wet-chemistry methods used to create biocidal materials are complex, time-consuming, and expensive. In the Journal of Applied Physics, by AIP Publishing, researchers from Belgium, Czech Republic, and Italy present a tutorial in which they explore a promising alternative called plasma-enabled surface engineering.
“Plasma-based engineering is an inexpensive and environmentally friendly method, because it doesn’t require the use of solvents and can be scaled up to industrial production relatively straightforwardly,” co-author Anton Nikiforov said.
The technology relies on nonequilibrium plasma, or partially ionized gas, that produces chemical reactions to change the properties at the material surface. The different temperature levels within the plasma — usually ionized noble gases, oxygen, or air — create distinct chemical pathways. Reactions can be manipulated by adjusting electric power for surface activation, coating deposition, and surface nanostructuring of virtually any solid material.
Plasma-enabled engineering can create contact-killing, antifouling, and drug-release surfaces. Contact-killing materials destroy microorganisms through the microscopic spikes that puncture microorganisms on contact. One study showed plasma-etched black silicon nanopillar structures are highly bactericidal against a variety of bacteria, including Staphylococcus aureus, an antibiotic-resistant bacterium well known for causing serious skin infection that can also infect the bloodstream, lungs, heart, and bones.
Antifouling materials prevent microorganisms from accumulating on surfaces to form biofilms and other dangerous microbial environments. Some of these materials are inspired by what nature has already invented, such as the antifouling properties of cicada and dragonfly wings, which are made up of nanopillars that kill microbes on contact and produce biochemicals to repel moisture.
Plasma polymerized superhydrophobic thin coatings — water-repelling materials inspired by the lotus leaf — have also been extensively developed and investigated for their antifouling properties. With the lack of moisture, microorganisms are prevented from adhering to and reproducing on these surfaces.
Drug-release surfaces control the release of antimicrobial compounds, enabling high-dose delivery of antibiotics to targeted locations, which is useful after surgery. For example, vancomycin, a common antibiotic, was deposited inside spherical particles. This was achieved in aerosol-assisted plasma deposition that combines high-energy plasma and drug aerosols.
Numerous plasma-based methods have been developed to create such surfaces, including low-pressure and atmospheric pressure plasma etching, plasma polymerization, sputtering, gas aggregation of nanoparticles, aerosol-assisted plasma deposition, and various combinations of the same methods.
Although plasma-based engineering is sure to accelerate, there are still challenges to overcome, including the need to better understand how bacteria stick to surfaces and what exactly is taking place as the microorganisms are destroyed.
The Latest on: Plasma-enabled surface engineering
- Plasma thruster advances bring deep space exploration closeron November 30, 2022 at 1:40 am
A Japanese scientist advances the development of plasma thrusters, which could boost spacecraft deep into space, by improving their conversion efficiency. For humanity to move deeper and deeper into ...
- Robust Plasma Focused Ion Beam System Uncovers “Weak Links”on November 29, 2022 at 10:06 am
A cutting-edge plasma-focused ion beam system, or FIB, with the capacity for in situ mechanical testing at temperatures between −130 and 1000 °C, will soon allow researchers from across the colleges ...
- Plasma Chemistryon November 27, 2022 at 1:42 pm
It is helpful to engineers, scientists and students interested in plasma physics, plasma chemistry, plasma engineering and combustion ... plasma metallurgy 8. Plasma-surface processing of inorganic ...
- Improving the performance of electrodeless plasma thrusters for space propulsionon November 11, 2022 at 5:49 am
A Tohoku University researcher has increased the performance of a high-power electrodeless plasma thruster ... University's Department of Electrical Engineering, has achieved a 30% conversion ...
- Improving the performance of electrodeless plasma thrusters for space propulsionon November 10, 2022 at 4:00 pm
One such electrodeless device, which harnesses radio frequency (rf) to generate plasma and a magnetic nozzle ... University's Department of Electrical Engineering, has achieved a 30% conversion ...
- Plasma Surface Treating Equipment Market Share, Size 2023-Global Trends, Market Demand, Industry Analysis, Growth, Opportunities and Forecast 2028on November 10, 2022 at 3:13 am
Nov 10, 2022 (The Expresswire) -- Global Plasma Surface Treating Equipment Market includes Elaborative company profiling of leading players of the Plasma Surface Treating Equipment market.
- Plasma Surface Preparation Machines Market For the period 2022 To 2028, this research report shows the current state and prospects and Growth.on November 2, 2022 at 7:01 am
It gives a detailed market research report of "Plasma Surface Preparation Machines market" economic transactions which involve an exchange of goods, information, services, currency, etc.
- Recent paper details new method of surface engineering polymer soft-materialson September 3, 2020 at 8:44 pm
“Non-thermal plasma has emerged as a viable method for surface engineering soft materials and biomaterials”, says Dr. Vineeth Vijayan, the first author of the publication, “and we have successfully ...
- Hypervelocity Impacts & Dusty Plasma Labon August 25, 2020 at 11:09 am
Both the Hypervelocity Impacts and Dusty Plasma Lab (HIDPL) and Space Science Lab (SSL) are directed by Dr. Truell Hyde and conduct research across a wide variety of physics areas. Together, they ...
via Bing News
The Latest on: Plasma-enabled surface engineering
[google_news title=”” keyword=”plasma-enabled surface engineering” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News