期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 14, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202009386
关键词
buoyancy flow; hydrogels; light-driven actuators; Marangoni effect
类别
资金
- National Key R&D Program of China [2018YFB1105400, 2017YFB1104303]
- National Science Foundation of China [51875544, 51675503, 61805230, 51805508, 51805509, 91963127]
- Fundamental Research Funds for the Central Universities [WKWK6030000103, WK2090000011, WK2090090012, WK2090000013, WK2480000002, WK2090090021, WK5290000001]
- Youth Innovation Promotion Association CAS [2017495]
- Chinese Academy of Sciences Instrument Project [YZ201566]
The LTMA is composed of photothermal nanoparticles-doped hydrogel, with surface energy changing as the nanoparticles absorb light energy. The 3D manipulation strategy combines Marangoni effect with photothermal buoyancy flow for complex self-propellant and floating/sinking motions. LTMA has unique advantages in remote sampling and automated drug delivery.
Marangoni-effect-driven actuators (MDAs) have the advantages of direct light-to-work conversion and convenient operation, which makes it widely researched in the cutting-edge fields including robots, micromachines, and intelligent systems. However, the MDA relies on the surface tension difference and it only works on the 2D liquid-air interface. Besides, the MDAs are normally pure black due to the light-absorption material limitation. Herein, a transparent light-driven 3D movable actuator (LTMA) and a 3D manipulation strategy are proposed. The LTMA is composed of photothermal nanoparticles-doped temperature-responsive hydrogel, whose surface energy changes as the nanoparticles absorb light energy. The 3D manipulation strategy combines Marangoni effect with photothermal buoyancy flow for realizing complex self-propellant and floating/sinking motions. The LTMA can perform more advanced tasks such as 3D obstacle avoidance and 3D sampling. Benefiting from the porous structure of hydrogel, LTMA can naturally absorb the chemical molecules for remote sampling and automated drug delivery. The light-driven, transparent, three-dimensionally movable, and programmable actuator has promising prospects in the field of micromachines and intelligent systems.
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