Full Content is available to subscribers

Subscribe/Learn More  >

Electrokinetic Microscope for Imaging Three-Dimensional Surface Topography and Heterogeneity

[+] Author Affiliations
Gi Hwan Kwon, Sung Jin Kim

KAIST, Daejeon, Republic of Korea

Tae Young Kim

Purdue University, West Lafayette, IN

Paper No. IMECE2011-62415, pp. 663-669; 7 pages
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 6: Fluids and Thermal Systems; Advances for Process Industries, Parts A and B
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5492-1
  • Copyright © 2011 by ASME


We introduce the concept of electrokinetic microscope (EKM) which is an imaging technique based on hydrodynamics and electrokinetics. The EKM can provide information of the three-dimensional surface topography and heterogeneity using a syringe pump, pressure sensor, and electrometer. The three-dimensional surface topography is obtained from the relation between the flow impedance and a relative distance of a probe from a specimen, and the surface heterogeneity is obtained by measuring streaming potential or current electrokinetically generated by a surface material. Experimental results show that streaming potential and current depend not only on the relative distance between the probe and specimen, but also on surface materials. The major advantages of the EKM are that it does not need direct physical contact between the probe and specimen, and the surface topography and heterogeneity of the specimen are measured simultaneously. EKM micrographs of microscale patterns with various materials and linewidths are presented. The lateral resolution of the EKM strongly depends on the inner diameter of the probe.

Copyright © 2011 by ASME
Topics: Imaging , Microscopes



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In