Ion diffusion upon concentrations in open nanofluidic channels

Chen Ling Chang, John Guofeng Bai, Kyong Hoon Lee, Jae Hyun Chung, Yaling Liu, Wing K Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The ion flow in nanochannels is investigated by using nanochannels in an open configuration that allows the direct observation of fluid diffusion through an optical microscope. An "open nanochannel" is a channel with the top open to air such that fluidics can be introduced from both the entrance and the top of the channels. The experimental results showed that the diffusion length of the potassium chloride and phosphate buffer decreased with their concentration. The observed behaviors were analyzed by the contact angle variation due to the electrowetting phenomena involving the interaction between electrical double layer and counter-ions in the solution.

Original languageEnglish (US)
Title of host publicationMicro and Nano Systems
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages913-918
Number of pages6
Volume11
ISBN (Electronic)079184305X
DOIs
StatePublished - Jan 1 2007
EventASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, United States
Duration: Nov 11 2007Nov 15 2007

Other

OtherASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007
Country/TerritoryUnited States
CitySeattle
Period11/11/0711/15/07

ASJC Scopus subject areas

  • Mechanical Engineering

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