Center for Nanophase Materials Sciences, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37381, United States.
Nano Lett. 2014 Feb 12;14(2):774-82. doi: 10.1021/nl404128d. Epub 2014 Jan 3.
A liquid metal filament supported on a dielectric substrate was directed to fragment into an ordered, mesoscale particle ensemble. Imposing an undulated surface perturbation on the filament forced the development of a single unstable mode from the otherwise disperse, multimodal Rayleigh-Plateau instability. The imposed mode paved the way for a hierarchical spatial fragmentation of the filament into particles, previously seen only at much larger scales. Ultimately, nanoparticle radius control is demonstrated using a micrometer scale switch.
在介电基底上支撑的液态金属丝被引导破碎成有序的介观颗粒集合体。在丝上施加起伏的表面微扰，迫使原本弥散的多模瑞利- Plateau 不稳定性发展为单一不稳定模式。所施加的模式为丝状物的分级空间破碎成颗粒铺平了道路，以前只在更大的尺度上才能看到这种情况。最终，使用微米级开关实现了对纳米颗粒半径的控制。
