THE EFFECT OF GLASS SURFACE TREATMENT ON CONTACT ANGLE USING RADIO FREQUENCY ATMOSPHERIC PRESSURE PLASMA
Authors:Ryan Hernandez, Lindsey Kabot, Ashley Matsushita, Tanner Worden
- Dr. Nina Abramzon, Associate Professor of Physics, Cal Poly Pomona
- Dr. Ertan Salik, Associate Professor of Physics, Cal Poly Pomona
The goal of this project is to investigate surface treatment with gas discharge plasma as a means of enhancing the binding of antibodies to a glass surface. Surface preparation through plasma processing removes contaminants and activates the surface by replacing surface functional groups with different atoms and molecules from the plasma. Such treatment is effective for various applications including improving adhesion and promoting fluid flow. A Surfx Plasma reactor along with helium, nitrogen, and oxygen gas were used to generate the plasma, and Image J software was used to analyze and measure the contact angles. We investigated the effects of several plasma treatment parameters including distance of the shower head to the surface of the treated glass slide, time treated, and power. Based on this investigation, we found that the most effective parameters were 40 W of power for oxygen gas, 35 W for nitrogen gas, a 2 cm reactor-to-surface distance, and a two minute treatment time for both nitrogen and oxygen. Future measurements include the effect of gas flow rate on glass surface modifications and the amount of time following plasma treatment for which the treatment remains effective.