This research reveals the possibility of altering the structural, surface, fluorescence, and optical characteristics of CR-39 polymer detector by the effect of Ultrasonic frequency (UF) plasma argon gas. The samples were exposed to the plasma at different times ranging from 20 min to 100 min. Fourier Transform Infrared (FTIR) Spectroscopy, contact angle goniometer, surface roughness tester, photoluminescence spectroscopy, and UV/Vis Spectroscopy have been applied to analyze alterations of CR-39 polymeric films to understand the mechanisms of produced alterations by plasma treatment. The obtained FTIR spectra demonstrated that the plasma treatment-related changes in the absorption bands are associated with the treatment time, leading to two critical processes, degradation, and crosslinking. In comparison to the untreated surface, the surface wettability results showed that the liquids' contact angle decreased after treatment with a UF plasma source. This modification in the treated surface denotes an increase in polar groups there, which causes the surface to change to a hydrophilic state. The surface roughness of the samples following plasma treatment showed that UF plasma significantly changed the surface morphology of the CR-39 films. After plasma exposure, considerable emission bands were produced, and the photoemission spectra of the treated film showed a fluorescence response. As the exposure time increased, more fluorescence peaks were formed due to the increase in defects. The UV/Vis spectra showed that the modified films' absorption edges were moved toward lower photon energies. This resulted in a smaller optical energy gap, which led to an expansion of the carbon cluster. Additionally, the untreated sample's transmittance dropped from 92% to 47% for the treated film. In contrast to untreated films, a change in optical characteristics was seen in treated films.

中文翻译：

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超声频率等离子体诱导聚烯丙基二甘醇碳酸酯动力学处理研究

这项研究揭示了通过超声波频率 (UF) 等离子体氩气的影响改变 CR-39 聚合物探测器的结构、表面、荧光和光学特性的可能性。样品在 20 分钟到 100 分钟不等的不同时间暴露于等离子体。傅里叶变换红外 (FTIR) 光谱、接触角测角仪、表面粗糙度测试仪、光致发光光谱和紫外/可见光谱已用于分析 CR-39 聚合物薄膜的变化，以了解等离子体处理产生变化的机制。获得的 FTIR 光谱表明，等离子体处理相关的吸收带变化与处理时间相关，导致两个关键过程：降解和交联。与未处理的表面相比，表面润湿性结果表明，用超滤等离子体源处理后液体的接触角减小。处理过的表面的这种修饰表明极性基团的增加，这导致表面变成亲水状态。等离子体处理后样品的表面粗糙度表明，超滤等离子体显着改变了 CR-39 薄膜的表面形貌。等离子体暴露后，产生了相当多的发射带，处理后的薄膜的光发射光谱显示出荧光响应。随着曝光时间的增加，由于缺陷的增加而形成了更多的荧光峰。紫外/可见光谱表明，改性薄膜的吸收边向较低光子能量移动。这导致光学能隙变小，从而导致碳簇的扩张。此外，未经处理的样品的透射率从经过处理的薄膜的 92% 下降到 47%。与未处理的薄膜相比，在处理过的薄膜中观察到光学特性的变化。