In this paper, we characterize a gradient of surface tension by patterning surface that containing radiative texture and hydrophobic behavior. The protein absorption is a challenge on the hydrophobic surface; we describe a method to manipulate the blood-droplet moving on the hydrophobic surface without stick effect. The phenomenon of droplet self-motion is due to hysteresis effect that triggered the droplet to move with a velocity of about 20mm/s. Mixing of two droplets is experimentally in this device and mixing time less than ten seconds.
Volume Subject Area:
Fluids Engineering
1.
Lchimura
K.
Oh
S. K.
Nakagawa
M.
2000
, “Light-driven motion of liquids on photoresponsive surface
,” Science
, vol. 288
, pp. 1624
–1626
2.
J. P. Valentino, S. Wagner, 2003, “Thermocapillary actuatuin of liquids using patterned microheater arrays,” Transducer, pp. 667–669
3.
S. K. Fan, C. Hashi, C. J. Kim, 2003, “Manipulation of multiple droplets on MxN grid by cross-reference EWOD driving scheme and pressure-contact packaging,” IEEE conf. MEMS, pp. 694–697
4.
J. Lee, B. He, N. A. Patankar, 2005, “A roughness-based wettability switching membrane device for hydrophobic surface,” J. M. M, pp. 591–600
5.
Paik
P.
Pamula
V. K.
Pollack
M. G.
Fair
R. B.
Electrowetting-based droplet mixers for microfluidics system
,” 2003
, Lab-on-a-chip
, vol. 3
, pp. 28
–33
6.
Tice
J. D.
Song
H.
Lyon
A. D.
Ismagilov
R. F.
2003
, “Formation of droplets and mixing in multiphase microfluidics at low values of the Reynolds and the capillary numbers
,” Langmuir
, vol. 19
, pp. 9127
–9133
7.
J. Fowler, H. Moon, C. J. Kim, 2002, “Enhancement of mixing by droplet-based microfluidics,” IEEE conf. MEMS, pp. 97–100
8.
Paik
P.
Pamula
V. K.
Pollack
M. G.
Fair
R. B.
Electrowetting-based droplet mixers for microfluidics system
,” Lab chip
, vol. 3
, pp. 28
–33
9.
Yoon
J. Y.
Garrell
E. L.
2003
, “Preventing biomolecular adsorption in electrowetting-based biofluidic chips
,” Analytical Chemistry
, vol. 75
, pp. 5097
–5102
10.
V. Srinivasan, V.K. Pamula, P. Paik, and R.B. Fair, 2004, “Protein Stamping for MALDI Mass Spectrometry Using an Electrowetting-based Microfluidic Platform,” Lab-on-a-Chip: Platforms, Devices, and Applications, Conf. 5591, SPIE Optics East, Philadelphia, Oct. 25–28
11.
Cassie
A. B. D.
Baxter
1944
, “Wettability of Porous Surfaces
,” Transactions of the Faraday Society
, Vol. 40
, pp. 546
–551
.12.
Adamson, W., 1990, Physical Chemistry of Surfaces, fifth edition, Wiley-Interscience, New York.
13.
Chen
W.
Fadeev
A. Y.
Hsieh
M C.
Oner
D.
Youngblood
J.
McCarthy
T. J.
1999
, “Ultrahydrophobic and ultralyophobic surface : some comments and examples
,” Langmuir
, vol. 15
, pp. 3395
–3399
14.
Daniel
S.
Chaudhury
M. K.
Rectified motion of liquid drops on gradient surface induced by vibration
,” 2002
, Langmuir
, vol. 18
, pp. 3404
–3407
15.
C. S. Yu, M. Y. Lin, Y. C. Hu, T. L. Fu, H. Y. Chou, 2004, “Self-alignment Optical Detection System for Dropletbased Biochemical Reactions,” Proceedings of IEEE Sensors 2004. Conference, Vienna, Austria, pp. 1026–1209, Oct. 24–27, 2004
16.
Verdier
C.
2001
, “The influence of he viscosity ratio on polymer droplet collision in quiescent blends
,” Polymer
, vol. 42
, pp. 6999
–7007
This content is only available via PDF.
Copyright © 2005
by ASME
You do not currently have access to this content.