Journal
NANO-MICRO LETTERS
Volume 8, Issue 2, Pages 157-164Publisher
SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-015-0071-3
Keywords
Micromotor; Self-propelling; Bacterial killing; Janus; E. coli
Funding
- National Natural Science Foundation of China [21304064]
- Natural Science Foundation of Jiangsu Province [BK20130292]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Fund for Excellent Creative Research Teams of Jiangsu Higher Education Institutions
- SRF for ROCS, SEM
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In this paper, we report fabrication of the bimetallic Janus microsphere, a magnesium microsphere with a silver surface coating, through thermal evaporation technique. Because of the Janus structure, this micromotor can be propelled in two different directions by the surface silver or magnesium 'engine' and hydrogen peroxide or water fuel. In addition, due to the bactericidal property of silver, this autonomous micromotor is capable of killing bacteria in solution. As compared to the static one, the micromotor is able to kill the bacteria at a much faster rate (about nine times of that of the static one), demonstrating the superiority of the motion one. We thus believe that the micromotor shown in the current study is potentially attractive for the environmental hygiene applications.
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