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

Gaoshan Huang; Jiyuan Wang; Zhaoqian Liu; Dekai Zhou; Ziao Tian; Borui Xu; Longqiu Li; Yongfeng Mei

doi:10.1039/C7NR07006C

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

Gaoshan Huang,

^a Jiyuan Wang,^bc Zhaoqian Liu,^a Dekai Zhou,^b Ziao Tian,^a Borui Xu,^a Longqiu Li*^b and Yongfeng Mei

*^a

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* Corresponding authors

^a Department of Materials Science, State Key Lab of ASIC and System, Fudan University, Shanghai 200433, P. R. China
E-mail: yfm@fudan.edu.cn

^b Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin 150001, P. R. China
E-mail: longqiuli@hit.edu.cn

^c School of Electrical and Control Engineering, Heilongjiang University of Science and Technology, Harbin 150022, P. R. China

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.

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DOI: https://doi.org/10.1039/C7NR07006C
Article type: Communication
Submitted: 19 Sep 2017
Accepted: 05 Nov 2017
First published: 06 Nov 2017

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Nanoscale, 2017,9, 18590-18596

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

Abstract

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

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