Optical emission characteristics of medium- to high-pressure N-2 dielectric barrier discharge plasmas during surface modification of polymers

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	Optical emission characteristics of medium- to high-pressure N-2 dielectric barrier discharge plasmas during surface modification of polymers
	Liu, Dongping ; Niu, Jinhai ; Yu, Naisen ; Liu DP(刘东平)
刊名	http://dx.doi.org/10.1116/1.3635372
	2011-09
关键词	ATMOSPHERIC-PRESSURE DBD TREATMENT MIXTURES FILMS GLOW FUNCTIONALIZATION EXCITATION
英文摘要	National Science Foundation [NSF-20803007, NSF-10875025]; The authors measured the band spectra (first and second positive systems) of the nitrogen molecule by optical emission spectroscopy with an aim to understand the mechanism of surface processing by medium- to high-pressure dielectric barrier discharge (DBD) plasmas. The experimentally measured and calculated spectra were compared to determine the vibrational and rotational temperatures of the N-2 (C-3 Pi(u)) state in the generated plasmas. The authors generated the N-2 DBD plasmas at a driving frequency of 1-7 kHz and a discharge pressure of 20-10(5) Pa for the surface modification of a polyethylene terephthalate (PET) sample. It was found that the vibrational temperature was greatly affected by the N-2 pressure while the rotational temperature remained constant in the N2 pressure range of 20-10(5) Pa. The emission intensity of N-2 first positive system (B-3 Pi -> A(3)Sigma) rapidly decreased at an increasing N-2 pressure due to the collisional relaxation process of the B-3 Pi state with N-2 molecules. The N-2(+)(B-2 Sigma(+)(u) -> X-2 Sigma(+)(g)) radiative transition was observed in the low-pressure DBD plasmas, which was attributed to the direct electron impact ionization of N-2 molecules. The surface characterizations of treated PET samples by contact angle measurement and atomic force microscopy indicate that the low-pressure N-2 DBD plasma is an effective method for the surface modification of polymers. Analysis indicates the plasma characteristics such as electron temperature and ion energy are mainly dependent on the N-2 pressure, which turn to determine the surface properties of treated PET samples. (C) 2011 American Vacuum Society. [DOI: 10.1116/1.3635372]
语种	英语
出版者	J VAC SCI TECHNOL A
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/91639]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Liu, Dongping,Niu, Jinhai,Yu, Naisen,et al. Optical emission characteristics of medium- to high-pressure N-2 dielectric barrier discharge plasmas during surface modification of polymers[J]. http://dx.doi.org/10.1116/1.3635372,2011.
APA	Liu, Dongping,Niu, Jinhai,Yu, Naisen,&刘东平.(2011).Optical emission characteristics of medium- to high-pressure N-2 dielectric barrier discharge plasmas during surface modification of polymers.http://dx.doi.org/10.1116/1.3635372.
MLA	Liu, Dongping,et al."Optical emission characteristics of medium- to high-pressure N-2 dielectric barrier discharge plasmas during surface modification of polymers".http://dx.doi.org/10.1116/1.3635372 (2011).