期刊
NANO RESEARCH
卷 9, 期 5, 页码 1310-1318出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-016-1026-9
关键词
micromotor; autonomous movement; self-propelling; motion-based sensing
类别
资金
- National Natural Science Foundation of China [21574094, 21304064]
- Natural Science Foundation of Jiangsu Province [BK20130292, BK20150314]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Fund for Excellent Creative Research Teams of Jiangsu Higher Education Institutions
- Scientific Research Foundation for the returned overseas Chinese scholars, State Education Ministry
In this study, we report a spindle-like micromotor. This device, which is fabricated using a one-step electrospinning method, consists of biodegradable polycaprolactone and an anionic surfactant. Intriguingly, not only can the resulting micromotor move autonomously on the surface of water for a long period of time (similar to 40 min) due to the Marangoni effect, but it also exhibits a pH sensing behavior due to variations in the surface tension caused by the release of surfactant under different pH conditions. More interestingly, we reveal that the motion-based pH sensing property is size-dependent, with smaller structures exhibiting a higher sensitivity. In addition, since polycaprolactone is a biodegradable material, the micromotor described in this study can be easily degraded in solution. Hence, features such as one-step fabrication, motion readout, and biodegradability render this micromotor an attractive candidate for sensing applications.
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