倾斜表面上的可调纳米粒子条纹图案
Tunable Nanoparticle Stripe Patterns at Inclined Surfaces
AI总结：
本研究通过控制倾斜基底和纳米粒子浓度，实现了在倾斜表面形成可调周期性纳米粒子条纹图案，揭示了重力与界面力的相互作用对纳米结构组装的影响。
摘要：
周期性纳米粒子组装是表面图案化的核心，广泛应用于生物传感、能量转换和纳米加工领域。胶体液滴在基底上的蒸发提供了一种简单而有效的途径来实现此类组装。本工作报告了首次实验验证，通过蒸发金纳米粒子悬浮液时三相接触线的粘滞-滑动动力学，形成了在倾斜基底上的图案。纳米粒子浓度和基底倾斜角度的变化会改变界面和重力之间的平衡，产生多个粘滞-滑动事件，从而生成周期性条纹。条纹密度对倾斜角度呈现正弦依赖关系，而条纹间距几乎不变。通过调整纳米粒子或表面活性剂浓度，可以独立控制条纹间距。这些结果突显了重力和界面力在引导周期性纳米粒子组装中的复杂相互作用，并建立了一种多功能、可编程的框架，用于具有可调纳米/微米尺度的表面图案化。
英文摘要：
Periodic assemblies of nanoparticles are central to surface patterning, with applications in biosensing, energy conversion, and nanofabrication. Evaporation of colloidal droplets on substrates provides a simple yet effective route to achieve such assemblies. This work reports the first experimental demonstration of patterns formed through stick-slip dynamics of the three-phase contact line during evaporation of gold nanoparticle suspensions on inclined substrates. Variation in nanoparticle concentration and substrate inclination alter the balance of interfacial and gravitational forces, producing multiple stick-slip events that generate periodic stripes. Stripe density exhibits a sinusoidal dependence on inclination angle, while inter-stripe spacing remains nearly invariant. Independent control over inter-stripe spacing is achieved through adjustment of nanoparticle or surfactant concentration. These results highlight the complex interplay of gravitational and interfacial forces in directing periodic nanoparticle assembly and establish a versatile, programmable framework for surface patterning with tunable nano/microscale dimensions.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
