4 papers
Viscoelasticity reshapes the frequency response of a rotating magnetic particle
Zhiyuan Zhao, Tingting Sun, Han Gao +3
A magnetic particle driven by a rotating magnetic field undergoes a transition from synchronous to asynchronous rotation at a critical driving frequency. The asynchronous dynamics…
Dynamics of a microroller under confinement
Han Gao, Nan Xie, Zaiyi Shen +3
Rotating particles can translate when placed near a surface, forming microrollers with a wide range of biomedical and microfluidic applications. In this work, we investigate the dy…
Response of magnetic particle to rotating magnetic field in viscoelastic fluid
Han Gao, Zhiyuan Zhao, Masao Doi +1
The rotational dynamics of a freely suspended ferromagnetic particle in viscoelastic fluid subjected to a rotating magnetic field is studied by experiments and theory. Our result r…
Dehydration drives damage in the freezing of brittle hydrogels
Shaohua Yang, Dominic Gerber, Yanxia Feng +6
It is widely known that freezing breaks soft, wet materials. However, the mechanism underlying this damage is still not clear. To understand this process, we freeze model, brittle…