磁流体
可重构性
磁场
制作
纳米技术
材料科学
磁性纳米粒子
领域(数学)
凝聚态物理
纳米颗粒
计算机科学
物理
电信
病理
医学
量子力学
纯数学
替代医学
数学
作者
Sai Zhao,J.-Y. Zhang,Yuchen Fu,Shipei Zhu,Ho Cheung Shum,Xubo Liu,Zhaoyu Wang,Ruquan Ye,Ben Zhong Tang,Thomas P. Russell,Yu Chai
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-06-29
卷期号:22 (13): 5538-5543
被引量:22
标识
DOI:10.1021/acs.nanolett.2c01721
摘要
Ferrofluids (FFs) can adapt their shape to a magnetic field. However, they cannot maintain their shape when the magnetic field is removed. Here, with a magneto-responsive and reconfigurable interfacial self-assembly (MRRIS) process, we show that FFs can be structured by a magnetic field and maintain their shape, like solids, after removing the magnetic field. The competing self-assembly of magnetic and nonmagnetic nanoparticles at the liquid interface endow FFs with both reconfigurability and structural stability. By manipulating the external magnetic field, we show that it is possible to "write" and "erase" the shape of the FFs remotely and repeatedly. To gain an in-depth understanding of the effect of MRRIS on the structure of FFs, we systematically study the shape variation of these liquids under both the static and dynamic magnetic fields. Our study provides a simple yet novel way of manipulating FFs and opens opportunities for the fabrication of all-liquid devices.
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