Document Detail

MedLine Citation:
PMID:  23311883     Owner:  NLM     Status:  Publisher    
Manipulating and controlling water-based aqueous solutions with the use of 'virtual' walls is relatively simple as compared to non-aqueous low surface tension liquids which pose greater challenges in microfluidic devices. This paper reports a novel technique to form a virtual wall for various low surface tension liquids. A microfluidic channel with virtual walls has been made for guiding the low surface tension liquids by using a specially designed oil-repellant surface. Unlike generic superoleophobic surfaces, our oil-repellant surface exhibited strong repellency to the lateral flow of low surface tension liquids such as hexadecane, dodecane, etc. A plasma-assisted surface micromachining process has been utilized to form the oil-repellant surface. The use of combined features of re-entrant geometries on the surface has played an important role in promoting its repellence to the lateral flow of low surface tension liquids. We have successfully demonstrated how low surface tension liquids can be well confined by the virtual walls.
Riberet Almeida; Jae Wan Kwon
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-14
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  -     ISSN:  1520-5827     ISO Abbreviation:  Langmuir     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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