am7b17114_si_006.avi (33.36 MB)
Reliable Manipulation of Gas Bubble Size on Superaerophilic Cones in Aqueous Media
media
posted on 2018-01-12, 00:00 authored by Xiuzhan Xue, Ruixiao Wang, Linwen Lan, Jingming Wang, Zhongxin Xue, Lei JiangGas bubbles in aqueous
media are ubiquitous in a broad range of
applications. In most cases, the size of the bubbles must be manipulated
precisely. However, it is very difficult to control the size of gas
bubbles. The size of gas bubbles is affected by many factors both
during and after the generation process. Thus, precise manipulation
of gas bubble size still remains a great challenge. The ratchet and
conical hairs of the Chinese brush enable it to realize a significant
capacity for holding ink and transferring them onto paper continuously
and controllably. Inspired by this, a superhydrophobic/superaerophilic
cone interface is developed to manipulate gas bubble size in aqueous
media. When the resultant force between the Laplace force and the
axial component of the buoyancy force approaches zero, the gas bubble
is held steadily by the superhydrophobic/superaerophilic copper cones
in a unique position (balance position). A new kind of pressure sensor
is also designed based on this principle.