Low voltage plug flow pumping using anisotropic electrode arrays

被引：71
作者：
Mpholo, M
Smith, CG
Brown, ABD
机构：
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[2] Technol Partnership Plc, Royston SG8 6EE, Herts, England
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 92卷 / 03期
关键词：
plug flow; microfluidics; pumping; asymmetric electrodes; AC electroosmosis;
D O I：
10.1016/S0925-4005(03)00289-2
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Arrays of asymmetric interdigitated electrodes were used to produce fluid flow of an ionic solution. The electrodes were made of transparent (transmission similar to80%) indium tin oxide (ITO) and were powered by AC voltages of less than 5 V-rms. We experimentally confirm predictions that the velocity of the fluid increases with the decreasing dimensions of the electrodes and we achieved velocities in excess of 450 mum/s at 2.2 V-rms. Plug flow for the different electrode dimensions was obtained by placing one array at the bottom of a solution and the other at the top, leaving a gap of 280 mum. The experimental observations fit well with theory. (C) 2003 Elsevier Science B.V All rights reserved.
引用
收藏
页码：262 / 268
页数：7
相关论文
共 13 条
  • [1] Pumping liquids using asymmetric electrode arrays
    Ajdari, A
    [J]. PHYSICAL REVIEW E, 2000, 61 (01): : R45 - R48
  • [2] Pumping of water with ac electric fields applied to asymmetric pairs of microelectrodes
    Brown, ABD
    Smith, CG
    Rennie, AR
    [J]. PHYSICAL REVIEW E, 2001, 63 (01):
  • [3] Integrated chip-based capillary electrophoresis
    Effenhauser, CS
    Bruin, GJM
    Paulus, A
    [J]. ELECTROPHORESIS, 1997, 18 (12-13) : 2203 - 2213
  • [4] Fluid flow induced by nonuniform ac electric fields in electrolytes on microelectrodes.: I.: Experimental measurements
    Green, NG
    Ramos, A
    González, A
    Morgan, H
    Castellanos, A
    [J]. PHYSICAL REVIEW E, 2000, 61 (04): : 4011 - 4018
  • [5] Ac electrokinetics: a survey of sub-micrometre particle dynamics
    Green, NG
    Ramos, A
    Morgan, H
    [J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2000, 33 (06) : 632 - 641
  • [6] Microfluidics - Controlling fluids in small places
    Polson, NA
    Hayes, MA
    [J]. ANALYTICAL CHEMISTRY, 2001, 73 (11) : 312A - 319A
  • [7] AC electric-field-induced fluid flow in microelectrodes
    Ramos, A
    Morgan, H
    Green, NG
    Castellanos, A
    [J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1999, 217 (02) : 420 - 422
  • [8] Ac electrokinetics: a review of forces in microelectrode structures
    Ramos, A
    Morgan, H
    Green, NG
    Castellanos, A
    [J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1998, 31 (18) : 2338 - 2353
  • [9] Field-effect flow control for microfabricated fluidic networks
    Schasfoort, RBM
    Schlautmann, S
    Hendrikse, L
    van den Berg, A
    [J]. SCIENCE, 1999, 286 (5441) : 942 - 945
  • [10] Microfluidics: Basic issues, applications, and challenges
    Stone, HA
    Kim, S
    [J]. AICHE JOURNAL, 2001, 47 (06) : 1250 - 1254
12