Surface Modification Process of Contact Lens Using Three-Phase AC Excited Nonequilibrium Atmospheric Pressure Ar Plasma

Abstract

A surface modification process on the contact lens using a nonequilibrium atmospheric pressure remote plasma excited by three-phase AC power source has been investigated. Two dimensional spatial distributions of optical emissions of Ar and OH were measured, and gas temperature and electron density were estimated using the optical emission spectroscopy. It has been found that the gas temperature in the upstream region of the remote plasma is lower than that in the downstream region due to the interfusion of ambient air. The heat-sensitive material such as plastic could be processed without thermal damage by the nonequilibrium atmospheric pressure remote plasma in the proper low-temperature region.

Hydrogen peroxide in lactate solutions irradiated by non-equilibrium atmospheric pressure plasma

“…helium and argon, whose ion temperatures (T i ) and neutral particles (T n ) are near body temperature, but the electron temperature (T e ) is extremely high, with T e T i ∼ T n [2,4]. The NEAPP offers useful applications in electronic industrial and biotechnological fields, such as surface modification [14][15][16][17][18][19][20], sterilization [21][22][23], plant growth enhancement in agriculture [24][25][26][27][28], food decontamination [2,29,30], electroporation for gene transfection [31][32][33][34], surgical hemostasis [35][36][37] and the pharmaceutical applications of microorganisms inactivation [38,39]. Also, plasma cancer therapy has been utilized in * Author to whom any correspondence should be addressed.…”

Laser Scattering Diagnosis of a 60-Hz Non-Equilibrium Atmospheric Pressure Plasma Jet

“…ecently, non-equilibrium atmospheric pressure plasma jets (NEAPPJs) have received increasing attention in the technological areas due to their potential application in surface modification, cleaning, etching, sterilization, and medicine, for example. [1][2][3][4][5][6][7][8][9][10] The unique advantage of NEAPPJs is that, while offering a significant number of high-density active species, such as radicals, electrons, and ions, the gas temperature is very low. A low gas temperature is key in the application of plasmas in the fields of biophysics and medicine because it ensures less damage to samples.…”

“…[5][6][7][8][9][10] Until now, NEAPPJs have been successfully applied in several fields. [1][2][3][4][5][6][7][8][9][10] However, the discharge mechanisms involved in NEAPPJs are not well understood.…”

Modifications of surface and bulk properties of magnetron-sputtered carbon films employing a post-treatment of atmospheric pressure plasma

“…A high voltage of 60-Hz alternative current was applied with a voltage of 9 kV to the APP source. 20) The substrate to source distance was maintained at 3 mm [Fig. 1(b)].…”