真空紫外和氢原子辐照协同形成自由基的实时原位电子自旋共振研究
Synergistic Formation of Radicals by Irradiation with Both Vacuum Ultraviolet and Atomic Hydrogen: A Real-Time In Situ Electron Spin Resonance Study
摘要：
我们报告聚四氟乙烯（PTFE）的表面改性作为一个例子的软和生物材料，发生在等离子体放电自由基形成的动力学分析，使用原位实时电子自旋共振（ESR）测量。在氢等离子体辐照过程中，同时测量了PTFE上氢原子和碳悬挂键（C-DB）的气相ESR信号。实时观察C-DB密度的动态变化，其中密度变化速率在初始照射期间加速，然后随时间变得恒定。值得注意的是，C-DBs是通过真空紫外线（VUV）和原子氢的照射协同形成的。原位实时ESR技术有助于阐明等离子体表面改性过程中的协同作用。
英文摘要：
We report on the surface modification of polytetrafluoroethylene (PTFE) as an example of soft- and bio-materials that occur under plasma discharge by kinetics analysis of radical formation using in situ real-time electron spin resonance (ESR) measurements. During irradiation with hydrogen plasma, simultaneous measurements of the gas-phase ESR signals of atomic hydrogen and the carbon dangling bond (C-DB) on PTFE were performed. Dynamic changes of the C-DB density were observed in real time, where the rate of density change was accelerated during initial irradiation and then became constant over time. It is noteworthy that C-DBs were formed synergistically by irradiation with both vacuum ultraviolet (VUV) and atomic hydrogen. The in situ real-time ESR technique is useful to elucidate synergistic roles during plasma surface modification.
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