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Superhydrophilic titania wall coating in microchannels by in situ sol–gel modification

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Abstract

An in situ reaction sol–gel method to synthesize superhydrophilic titania films in silicon microchannels at room temperature is reported. Superhydrophilic surface can be realized on TiO2 films with thickness less than 10 nm. The water flow velocity in the TiO2-coated silicon channels reached almost 4 times of the velocity in SiO2-coated channels. The ultra-thin superhydrophilic TiO2 films fabricated by this method show the ability to strongly improve the capillary of microchannels without affecting the morphology of the channel walls, indicating potential applications to biomolecule analysis and surface tension driven microfluidic systems. Due to its low operating temperature, this method is also suitable for polymer microstructures such as PDMS and PMMA microfluidic chips.

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References

  1. Roman GT, Culbertson CT (2006) Surface engineering of poly(dimethylsiloxane) microfluidic devices using transition metal sol–gel chemistry. Langmuir 22:4445–4451

    Article  Google Scholar 

  2. Bartl MH, Boettcher SW, Frindell KL, Stucky GD (2005) 3-D molecular assembly of function in titania-based composite material systems. Acc Chem Res 38:263–271

    Article  Google Scholar 

  3. Asahi R, Morikawa T, Ohwaki T, Aoki K, Taga Y (2001) Visible-light photocatalysis in nitrogen-doped titanium oxides. Science 293:269–271

    Article  Google Scholar 

  4. Meng Q, Takahashi K, Zhang X, Sutanto I, Rao TN, Sato O, Fujishima A, Watanabe H, Nakamori T, Uragami M (2003) Fabrication of an efficient solid-state dye-sensitized solar cell. Langmuir 19:3572–3574

    Article  Google Scholar 

  5. Wang P, Zakeeruddin SM, Moser JE, Nazeeruddin MK, Sekiguchi T, Gratzel M (2003) A stable quasi-solid-state dye-sensitized solar cell with an amphiphilic ruthenium sensitizer and polymer gel electrolyte. Nat Mater 2:402–407

    Article  Google Scholar 

  6. Ashkarran AA, Mohammadizadeh MR (2008) Superhydrophilicity of TiO2 thin films using TiCl4 as a precursor. Mater Res Bull 43:522–530

    Article  Google Scholar 

  7. Boukrouh S, Bensaha R, Bourgeois S, Finot E, Marco de Lucas MC (2008) Reactive direct current magnetron sputtered TiO2 thin films with amorphous to crystalline structures. Thin Solid Films 516:6353–6358

    Article  Google Scholar 

  8. Yang T, Shiu C, Wong M (2004) Structure and hydrophilicity of titanium oxide films prepared by electron beam evaporation. Surf Sci 548:75–83

    Article  Google Scholar 

  9. Zhang M, Zhang T, Cui T (2011) Wettability conversion from superoleophobic to superhydrophilic on titania/single-walled carbon nanotube composite coatings. Langmuir 27:9295–9301

    Article  Google Scholar 

  10. Chen CF, Kung CF, Chen HC, Chu CC, Chang CC, Tseng FG (2006) A microfluidic nanoliter mixer with optimized grooved structures driven by capillary pumping. J Micromech Microeng 16:1358–1365

    Article  Google Scholar 

  11. Kolari K, Hokkanen A, Stuns I (2005) Self-feeding microfluidic structures on silicon and glass. Proc SPIE 5839:323–331

    Article  Google Scholar 

  12. Tuteja A, Choi W, Ma M, Mabry JM, Mazzella SA, Rutledge GC, Mckinley GH, Cohen RE (2007) Designing superoleophobic surfaces. Science 318:1618–1622

    Article  Google Scholar 

  13. Quéré David (2008) Wetting and roughness. Annu Rev Mater Res 38:71–99

    Article  Google Scholar 

  14. Kim BS, Shin S, Shin SJ, Kim KM, Cho HH (2011) Micro-nano hybrid structures with manipulated wettability using a two-step silicon etching on a large area. Nanoscale Res Lett 6:333

    Article  Google Scholar 

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Acknowledgement

This research was supported by the Shenzhen Peacock Plan (No. KQCX20130628155525050).

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Correspondence to Min Zhang.

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Ma, H., Zhang, M. Superhydrophilic titania wall coating in microchannels by in situ sol–gel modification. J Mater Sci 49, 8123–8126 (2014). https://doi.org/10.1007/s10853-014-8521-8

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  • DOI: https://doi.org/10.1007/s10853-014-8521-8

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