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Issue 47, 2017
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Rocket-inspired tubular catalytic microjets with grating-structured walls as guiding empennages

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Abstract

Controllable locomotion in the micro-/nanoscale is challenging and attracts increasing research interest. Tubular microjets self-propelled by microbubbles are intensively investigated due to their high energy conversion efficiency, but the imperfection of the tubular geometry makes it harder to realize linear motion. Inspired by the macro rocket, we designed a tubular microjet with a grating-structured wall which mimics the guiding empennage of the macro rocket, and we found that the fluid can be effectively guided by the grooves. Both theoretical simulation and experimental work have been carried out, and the obtained results demonstrate that the stability margin of the grating-structured microjet can be enhanced. Compared with microjets with smooth walls, the structured microjets show an enhanced ability of moving linearly. In 10% H2O2, only 20% of the smooth microjets demonstrate linear trajectories, while 80% of the grating-structured microjets keep moving straight. The grating-structured microjet can maintain linear motion under external disturbance. We further propose to increase the stability by introducing a helical grating structure.

Graphical abstract: Rocket-inspired tubular catalytic microjets with grating-structured walls as guiding empennages

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Article information


Submitted
19 Sep 2017
Accepted
05 Nov 2017
First published
06 Nov 2017

Nanoscale, 2017,9, 18590-18596
Article type
Communication

Rocket-inspired tubular catalytic microjets with grating-structured walls as guiding empennages

G. Huang, J. Wang, Z. Liu, D. Zhou, Z. Tian, B. Xu, L. Li and Y. Mei, Nanoscale, 2017, 9, 18590
DOI: 10.1039/C7NR07006C

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