镍-富勒烯薄膜混合物的形态演变
Morphological Evolution of Nickel-Fullerene Thin Film Mixtures
AI总结：
研究通过外部刺激调控镍-富勒烯薄膜的形态演变，揭示相分离机制及绝缘行为，为电子器件提供新思路。
摘要：
由金属-富勒烯复合材料构成的混合系统表现出有趣性质，但通常会遭受热不稳定性的困扰。通过适当控制，这种不稳定性可以被利用以形成具有纳米级精度的复杂纳米结构。这些自组织现象不仅限于热刺激，也可以通过其他外部刺激触发。在本研究中，我们研究了由蒸发的C60和溅射镍混合物组成的薄膜的形态演变，重点在于外部刺激如何影响其结构和电学性质。薄膜在受控沉积条件下制备，其表面形态通过先进的表征技术进行分析。随着组成和外部处理的变化，薄膜形态出现逐步变化，突显了金属和分子组分之间的相互作用。特别是，由于退火处理，样品经历强烈的相分离，形成直径达数十微米的结构，并增加电阻，表现出绝缘行为。这些发现提供了指导混合薄膜形成的机制见解，并建议在电子、光电和能源相关设备中的潜在应用。
英文摘要：
Hybrid systems consisting of metal-fullerene composites exhibit intriguing properties but often suffer from thermal instability. With proper control, such instability can be harnessed to enable the formation of sophisticated nanostructures with nanometric precision. These self-organization phenomena are not limited to thermal stimulation alone but can also be triggered by other external stimuli. In this work, we investigate the morphological evolution of thin films composed of evaporated C60 and sputtered nickel mixtures, focusing on how external stimuli influence both their structural and electrical properties. Thin films were prepared under controlled deposition conditions, and their surface morphology was analyzed using advanced characterization techniques. Progressive changes in film morphology were observed as a function of composition and external treatment, highlighting the interplay between metallic and molecular components. In particular, it was observed that, due to the annealing treatment, the sample undergoes strong phase separation, with the formation of structures tens of microns in diameter and an increase in electrical resistance, exhibiting insulating behavior. These findings provide insights into the mechanisms governing hybrid thin film formation and suggest potential applications in electronic, optoelectronic, and energy-related devices.
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