scholarly journals Influence of a Point-to-Plane DC Negative Corona Discharge on Gel Surfaces

10.14311/1033 ◽  
2008 ◽  
Vol 48 (4) ◽  
Author(s):  
Y. Klenko ◽  
V. Scholtz
Keyword(s):  
Experimental Investigation ◽  
Surface Modification ◽  
Electric Field ◽  
Corona Discharge ◽  
Biomedical Applications ◽  
Single Point ◽  
Polymer Surfaces ◽  
Negative Corona ◽  
Negative Corona Discharge ◽  
Time Periods

Point-to-plane corona discharge is widely used for modifying polymer surfaces for biomedical applications and for sterilization and decontamination. This paper focuses on an experimental investigation of the influence of the single-point and multi-point corona discharge electric field on gel surface. Three types of gelatinous agar were used as the gel medium: blood agar, nutrient agar and Endo agar. The gel surface modification was studied for various time periods and discharge currents. 

Surface Electric Field for Negative Corona Discharge in Atmospheric Pressure Air

2011 ◽  
Vol 39 (8) ◽  
pp. 1644-1651 ◽  
Author(s):  
Yuesheng Zheng ◽  
Jinliang He ◽  
Bo Zhang ◽  
Rong Zeng ◽  
Zhanqing Yu
Keyword(s):  
Electric Field ◽  
Corona Discharge ◽  
Atmospheric Pressure ◽  
Negative Corona ◽  
Negative Corona Discharge ◽  
Surface Electric Field

Effect of the Corona Discharge on ZnTe Film

2011 ◽  
Vol 314-316 ◽  
pp. 171-175 ◽  
Author(s):  
Na Ri ◽  
Guo Rong Li
Keyword(s):  
Electric Field ◽  
Corona Discharge ◽  
High Voltage ◽  
Discharge Current ◽  
Applied Voltage ◽  
Blue Shift ◽  
Negative Corona ◽  
Voltage Range ◽  
Negative Corona Discharge ◽  
Electric Field Treatment

The effect of corona electric field on the surface of Pr-doped ZnTe thin film was studied. The device which can produce the high-voltage corona electric field is developed and used. The V-A characteristics of positive and negative corona discharge between the adjacent needle plates were measured. Whether positive or negative corona discharge, the corona discharge current of the plate is increased with the applied voltage increasing; the voltage range of negative corona discharge is wider than that of the positive corona discharge, meanwhile under the same applied voltage, the negative corona discharge current is bigger, not only its curve is smooth, but also its discharge is stable. The thermal effect of electric field is small. The electric field strength is 7.0 kV•cm-1. By atomic force microscope, it is found that the size of particles becomes large and uniform, and the surface becomes rough with electric field treatment. The measurement results reveal that the average radius of particles is 108.70nm before the effect and 227.27nm after the effect. By UV-Vis Spectrophotometer, it is found that a strong optical absorption peak appears at the region of 220 - 250nm with electric field treatment. This means that the stronger light absorption peak turn out a blue shift under the effect of electric field. The phenomenon of the blue shift proves that the high-voltage corona electric field has an impact on the band gap of the film. The voltage range of the negative corona discharge is wide and stable. The thermal effect produced by the high-voltage corona electric field on the sample is very small, so usually it can be ignored. The high-voltage corona electric field can change the surface morphology of some films, makes the current density of the sample location increase in a small cross section. The negative high-voltage corona discharge should well be used to research in biophysics such as the transgenic plants. High-voltage corona discharge mutagenesis has become a new physical mutation technique. Introduction

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