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Formation of self-organized nano-dimensional structures on InP surfaces using ion irradiation and their wettability: A study based on experimental and theoretical concepts of surface
Radiation Physics and Chemistry ( IF 2.9 ) Pub Date : 2022-06-21 , DOI: 10.1016/j.radphyschem.2022.110353
Indra Sulania , Pravin Kumar , P.K. Priya , H.P. Bhasker , U.B. Singh , Ranjeet K. Karn , Chetna Tyagi , R.P. Yadav

InP surfaces are bombarded with 50 keV Ar+ ion beam at normal incidence with fluences ranging from∼2 × 1016 to 8 × 1016 ions/cm2. The formation of self-organized nanodots on Indium Phosphide (InP) are captured by Atomic Force Microscope (AFM) and Scanning Electron Microscope (SEM). Uniformity in size of dots is improved for the higher fluences and the surface becomes Indium rich with ion irradiation. Wettability studies show that the surface contact angle (CA) increases with ion irradiation and stabilizes for later fluences. The autocorrelation and height-height correlation function are applied for surface correlation and fractal nature of AFM images. Wetting properties of fractal surfaces are explored. The interface-width is found to increase with the ion fluences. The lateral correlation length is computed using auto-correlation function, while roughness exponent and the fractal dimension were estimated using height-height correlation function. Larger values of interface width indicate the larger self-organized nanodots on the surface. Fractal formations are able to capably disperse or collect mass, energy, and information over large spatial and temporal dimensions. Due to these properties, artificial fractal structures are becoming an essential and fundamental topic of study in applied research.



中文翻译:

利用离子辐照在 InP 表面形成自组织纳米维结构及其润湿性:基于表面实验和理论概念的研究

InP 表面用 50 keV Ar +离子束以垂直入射方式轰击,能量范围为~2 × 10 16至 8 × 10 16离子/cm 2. 通过原子力显微镜 (AFM) 和扫描电子显微镜 (SEM) 捕获磷化铟 (InP) 上自组织纳米点的形成。对于更高的能量密度,点尺寸的均匀性得到改善,并且表面在离子照射下变得富含铟。润湿性研究表明,表面接触角 (CA) 随着离子辐照的增加而增加,并在以后的通量中稳定下来。自相关和高度-高度相关函数适用于 AFM 图像的表面相关和分形性质。探索了分形表面的润湿特性。发现界面宽度随着离子通量的增加而增加。横向相关长度使用自相关函数计算,而粗糙度指数和分形维数使用高度-高度相关函数估计。较大的界面宽度值表示表面上较大的自组织纳米点。分形结构能够在较大的空间和时间维度上分散或收集质量、能量和信息。由于这些特性,人工分形结构正在成为应用研究中必不可少的基础研究课题。

更新日期:2022-06-21
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