A fixed coaxial high voltage copper rod was placed in the quartz glass tube and needle-shaped copper prick electrodes were www.selleckchem.com/products/Perifosine.html placed in an array on the copper rod.Resonance occurs when the power frequency is 21 kHz in Figure 1. At this frequency, cycle transmission charge, discharge power and efficiency of energy injection are all at maximum. Therefore, the frequency and peak to peak voltage of the power supply were chose to be 21 kHz and 16.4 kV, respectively.The load characteristic of DBD reactor was capacitive, and the discharge process can be modeled as capacitor charge-discharge process. Inhibitors,Modulators,Libraries The voltage Um across the capacitor Cm was proportional to tansimission charge in discharge space Qm. The supply voltage and Um measured by high voltage probe were added to the y-x axis of the oscilloscope, so the Lissajous curve [23] can be obtained (in Figure 2).
dQ in the figure was transimission charge Inhibitors,Modulators,Libraries in half cycle, and Ub was starting discharge voltage. DBD cycle transimission charge and discharge power can be calculated approximately by the following equations:Figure 2.Expected Lissajous curve.Qm=2(QA?QB)(1)P=1T��0Tu?imdt=f��0Tu?Cm?dumdt?dt=f��u?dqm=fS(2)The Inhibitors,Modulators,Libraries measured voltage and current waveform, voltage instantaneous power waveform and Lissajous curve in modified experimental conditions were shown in Figure 3. According to the equations (1) to (2), the cycle transmission charge was 1,159 nC and discharge power was 114.3 W.Figure 3.Discharge waveforms and Lissajous curve (a) voltage and current waveform and voltage instantaneous power waveform; (b) Lissajous curve.
After treatment, the MWNTs were distributed as thinly as possible on the bottom of the cylindrical quartz glass tube. All MWNTs were evenly distributed in the region wrapped up by the copper strip. This is because the discharge in this region is more intense, thus improving the plasma modification effect. The MWNTs were treated for Inhibitors,Modulators,Libraries 30, 60 and 120 s. In the end, we obtained MWNTs processed for different duration.2.3. Sensitivity MeasurementThe substrate where the MWNTs were deposited on, was a interdigital electrodes printed circuit board with area 5 mm �� 10 mm, thickness of electrodes 30 ��m, space between the electrodes 1 mm. The MWNTs modified by DBD plasma were put into a beaker containing the appropriate ethanol solution, after which they were made to undergo ultrasonic treatment for 1 h.
Drops of the mixed solution were dropped on the surface of the substrate. Finally, the substrates coated with MWNTs were placed in oven and baked at 80 ��C for 2 h. The process was repeated for seve
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