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Shape-Reconfigurable Ferrofluids

delete2022-06-29
delete16
PRE
AI
S
Sai Zhao
J
J.-Y. Zhang
Y
Yuchen Fu
S
Shipei Zhu
H
Ho Cheung Shum
X
Xubo Liu
Z
Zhaoyu Wang
Ruquan YE cover
Ruquan YE (Ruquan Ye)
B
Ben Zhong Tang
T
Thomas P. Russell *
Y
Yu Chai *
DOI:10.1021/acs.nanolett.2c01721delete
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Abstract

Abstract

En 中文
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 nano-particles at the liquid interface endow FFs with both reconfigur-ability 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.
Keywords:
nanoparticles
ferrofluids
liquid interface
self-assembly
reconfiguration

Journal

Nano Letters cover
Nano Letters
IF:
9.1
Papers:
2.7W
Citations:
16.5W

Organization

U
University of Hong Kong
Scholars:
4.1W
Papers: 3.9W
Citations: 10.1W
T
technical institute of physics & chemistry, cas
Scholars:
2.2K
Papers: 1.8K
Citations: 4
T
The Chinese University of Hong Kong, Shenzhen
Scholars:
4.3K
Papers: 4.0K
Citations: 7
C
City University of Hong Kong
Scholars:
2.3W
Papers: 3.0W
Citations: 6.1W
C
chinese academy of sciences
Scholars:
56.7W
Papers: 45.0W
Citations: 704
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