Advertisement

Microsystem Technologies

, Volume 19, Issue 2, pp 245–251 | Cite as

Light-actuated water droplet motions on ZnO nanorods

  • Chien-Wei Liu
  • Chen-Pin Hsu
  • J. Andrew Yeh
  • Yuh-Chang Sun
  • Yu-Fen Huang
  • Byung Hwan Chu
  • Fan Ren
  • Yu-Lin WangEmail author
Technical Paper

Abstract

Water droplets were either pushed or pulled with an ultra-violet (UV) light on vertically aligned ZnO nanorods. Steric acid-immobilized ZnO nanorods grown on quartz substrates exhibit a hydrophobic surface possessing high contact angles between water droplets and the substrates. Exposure of UV onto droplets on ZnO NRs led to reduction of contact angles and resulted the internal circulating flows inside the droplets. Droplets located at different sites under the spot of the UV light created different magnitudes of contact angle changes and the internal circulating flows which allowed us to push the droplets away or pull the droplets toward the centre of the UV spot.

Keywords

Contact Angle Water Droplet Quartz Substrate Internal Flow Superhydrophobic Surface 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was partially supported by National Science Council grant (No. 99B20495A) and by the research grant (100N2049E1) at National Tsing Hua University.

Supplementary material

Supplementary material 1 (MPG 6338 kb)

Supplementary material 2 (WMV 7869 kb)

Supplementary material 3 (MPG 10676 kb)

References

  1. Chiou PY, Moon H, Toshiyoshi H, Kim C-J, Wu MC (2003) Light actuation of liquid by optoelectrowetting. Sens Actuators A 104(3):222–228. doi: 10.1016/s0924-4247(03)00024-4 CrossRefGoogle Scholar
  2. Cho SK, Moon H, Flower J, Fan SK, Kim CJ (2001) In: ASME international mechanical engineering congress and expansion, Vol IMECE2001/MEMS-23830 New YorkGoogle Scholar
  3. Cui H, Yang GZ, Sun Y, Wang CX (2010) Reversible ultraviolet light-manipulated superhydrophobic-to-superhydrophilic transition on a tubular SiC nanostructure film. Appl Phys Lett 97(18):183112-1–183112-3. doi: 10.1063/1.3510472 Google Scholar
  4. Dixit SS, Kim H, Vasilyev A, Eid A, Faris GW (2010) Light-driven formation and rupture of droplet bilayers. Langmuir 26(9):6193–6200. doi: 10.1021/la1010067 CrossRefGoogle Scholar
  5. Genzer J, Efimenko K (2006) Recent developments in superhydrophobic surfaces and their relevance to marine fouling: a review. Biofouling 22(5):339–360. doi: 10.1080/08927010600980223 CrossRefGoogle Scholar
  6. He G, Wang K (2011) The super hydrophobicity of ZnO nanorods fabricated by electrochemical deposition method. Appl Surf Sci 257(15):6590–6594. doi: 10.1016/j.apsusc.2011.02.083 CrossRefGoogle Scholar
  7. Hu W, Ohta A (2011) Aqueous droplet manipulation by optically induced Marangoni circulation. Microfluid Nanofluid 11(3):307–316. doi: 10.1007/s10404-011-0797-2 CrossRefGoogle Scholar
  8. Ichimura K, Oh SK, Nakagawa M (2000) Light-Driven Motion of Liquids on a Photoresponsive Surface. Science 288(5471):1624–1626. doi: 10.1126/science.288.5471.1624 CrossRefGoogle Scholar
  9. Kaneda M, Hyakuta K, Takao Y, Ishizuka H, Fukai J (2008) Internal flow in polymer solution droplets deposited on a lyophobic surface during a receding process. Langmuir 24(16):9102–9109. doi: 10.1021/la801176y CrossRefGoogle Scholar
  10. Kim NY, Hong SM, Park SS (2006) The movement of micro droplet with the effects of dielectric layer and hydrophobic surface treatment with R.F. atmospheric plasma in EWOD structure. J Phys 34:650–655Google Scholar
  11. Kotz KT, Noble KA, Faris GW (2004) Optical microfluidics. Appl Phys Lett 85(13):2658–2660. doi: 10.1063/1.1797538 CrossRefGoogle Scholar
  12. Kwon S, Lee LP (2001) In: Proceedings of the 11th international conference on solid-state sensors and actuators, Eurosensors XV, Transducers: pp 1348–1351Google Scholar
  13. Lai Y, Gao X, Zhuang H, Huang J, Lin C, Jiang L (2009) Designing superhydrophobic porous nanostructures with tunable water adhesion. Adv Mater 21(37):3799–3803. doi: 10.1002/adma.200900686 CrossRefGoogle Scholar
  14. Lai Y, Lin Z, Huang J, Sun L, Chen Z, Lin C (2010) Controllable construction of ZnO/TiO2 patterning nanostructures by superhydrophilic/superhydrophobic templates. New J Chem 34(1):44CrossRefGoogle Scholar
  15. Lee M, Kwak G, Yong K (2011) Wettability control of ZnO nanoparticles for universal applications. ACS Appl Mater Interfaces 3(9):3350–3356. doi: 10.1021/am2004762 CrossRefGoogle Scholar
  16. Liu Y, Tan T, Wang B, Song X, Li E, Wang H, Yan H (2008) Superhydrophobic behavior on transparency and conductivity controllable films. J Appl Phys 103(5):056104–0561030Google Scholar
  17. Masiero S, Lena S, Pieraccini S, Spada GP (2008) The direct conversion of light into continuous mechanical energy by photoreversible self-assembly: a prototype of a light-powered engine. Angew Chem Int Ed 47(17):3184–3187. doi: 10.1002/anie.200705313 CrossRefGoogle Scholar
  18. Pollack MG, Fair RB, Shenderov AD (2000) Electrowetting-based actuation of liquid droplets for microfluidic applications. Appl Phys Lett 77(11):1725–1726. doi: 10.1063/1.1308534 Google Scholar
  19. Sakai M, Kono H, Nakajima A, Zhang X, Sakai H, Abe M, Fujishima A (2009) Sliding of water droplets on the superhydrophobic surface with ZnO nanorods. Langmuir 25(24):14182–14186. doi: 10.1021/la901461k CrossRefGoogle Scholar
  20. Song J, Lim S (2006) Effect of seed layer on the growth of ZnO nanorods. J Phys Chem C 111(2):596–600. doi: 10.1021/jp0655017 CrossRefGoogle Scholar
  21. Sun RD, Nakajima A, Fujishima A, Watanabe T, Hashimoto K (2001) Photoinduced surface wettability conversion of ZnO and TiO2 thin films. J Phys Chem B 105(10):1984–1990. doi: 10.1021/jp002525j CrossRefGoogle Scholar
  22. Sun H, Luo M, Weng W, Cheng K, Du P, Shen G, Han G (2008) Position and density control in hydrothermal growth of ZnO nanorod arrays through pre-formed micro/nanodots. Nanotechnology 19(39):395602. doi: 10.1088/0957-4484/19/39/395602 Google Scholar
  23. Wang BB, Feng JT, Zhao YP, Yu TX (2010) Fabrication of novel superhydrophobic surfaces and water droplet bouncing behavior—part 1: stable ZnO–PDMS superhydrophobic surface with low hysteresis constructed using ZnO nanoparticles. J Adhes Sci Technol 24:2693–2705CrossRefGoogle Scholar
  24. Xiong J, Das SN, Shin B, Kar JP, Choi JH, Myoung JM (2010) Biomimetic hierarchical ZnO structure with superhydrophobic and antireflective properties. J Colloid Interface Sci 350(1):344–347. doi: 10.1016/j.jcis.2010.06.053 CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Chien-Wei Liu
    • 1
  • Chen-Pin Hsu
    • 1
  • J. Andrew Yeh
    • 1
  • Yuh-Chang Sun
    • 2
  • Yu-Fen Huang
    • 2
  • Byung Hwan Chu
    • 3
  • Fan Ren
    • 3
  • Yu-Lin Wang
    • 1
    Email author
  1. 1.Institute of Nanoengineering and MicrosystemsNational Tsing Hua UniversityHsinchuTaiwan
  2. 2.Department of Biomedical Engineering and Environmental SciencesNational Tsing Hua UniversityHsinchuTaiwan
  3. 3.Department of Chemical EngineeringUniversity of FloridaGainesvilleUSA

Personalised recommendations