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Optical emission characteristics of medium- to high-pressure N2 dielectric barrier discharge plasmas during surface modification of polymers
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10.1116/1.3635372
/content/avs/journal/jvsta/29/6/10.1116/1.3635372
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/29/6/10.1116/1.3635372

Figures

Image of FIG. 1.
FIG. 1.

Typical optical emission spectra of N2 DBD plasmas produced at P = 2.0 × 10, 1.0 × 102, 1.0 × 103, and 1.0 × 105 Pa. The wavelength range is (a) 300–800 nm and (b) 650–800 nm, respectively. The driving frequency of ac power supply is kept at 4 kHz.

Image of FIG. 2.
FIG. 2.

(Color online) Typical optical emission spectra of N2 DBD plasmas produced at P = 100 Pa and f = 1–7 kHz.

Image of FIG. 3.
FIG. 3.

(Color online) Experimental and simulated emission spectra of N2 second positive system. The plasmas was produced at f = 4 kHz and P = 100 Pa. This fitting leads to T Rot = 460 ± 10 K and T Vib = 2800 ± 50 K.

Image of FIG. 4.
FIG. 4.

(Color online) Rotational (a) and vibrational (b) temperatures of N2 (C 3Π u ) molecules as a function of N2 pressure for N2 DBD plasmas produced at different driving frequencies.

Image of FIG. 5.
FIG. 5.

(Color online) Emission intensity ratio of FNS (391.4 nm) to N2 SPS (337.1 nm) vs N2 pressure.

Image of FIG. 6.
FIG. 6.

(Color online) Water contact angle of the treated PET polymers as a function of N2 pressure.

Image of FIG. 7.
FIG. 7.

(Color online) Water contact angle of the treated PET polymers as a function of storage duration.

Image of FIG. 8.
FIG. 8.

(Color online) Typical AFM images of PET samples treated at f = 4 kHz and P = (a) 30 Pa, (b) 700 Pa, and (c) 105 Pa.

Image of FIG. 9.
FIG. 9.

(Color online) High-resolution XPS C 1s spectra for (a) untreated PET sample, (b) the PET sample treated at f = 4 kHz and P = 30 Pa, (c) the PET sample treated at f = 4 kHz and P = 1000 Pa, and (d) the PET sample treated at f = 4 kHz and P = 105 Pa.

Image of FIG. 10.
FIG. 10.

(Color online) Voltage and current waveforms of the barrier discharge produced at P = 300 Pa: (a) in 500 μs/div; (b) 10 μs/div.

Image of FIG. 11.
FIG. 11.

(Color online) Voltage and current waveforms obtained at atmospheric pressure.

Tables

Generic image for table
TABLE I.

Surface rms roughness values and C/N/O ratios of PET samples treated in N2 DBD plasmas.

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/content/avs/journal/jvsta/29/6/10.1116/1.3635372
2011-09-30
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optical emission characteristics of medium- to high-pressure N2 dielectric barrier discharge plasmas during surface modification of polymers
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/29/6/10.1116/1.3635372
10.1116/1.3635372
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