Document Detail

Particle size impact on collapse in monolayers.
MedLine Citation:
PMID:  22921324     Owner:  NLM     Status:  Publisher    
We report on the impact of different size particles on the collapse of a Langmuir monolayer. We use a SDS-DODAB monolayer because it is known to reversibly collpase under compression and expansion cycles. Particles with diameters of 1 $\mu$m, 0.5 $\mu$m, 0.1 $\mu$m, and 20 nm are deposited on the SDS-DODAB monolayer. We find a critical particle size range of 0.1 $\mu$m to 0.5 $\mu$m that produces a transition from reversible to irreversible collapse. The nature of the collapse is determined through optical observations and surface pressure measurements. In addition, although 20 nm particles do not cause irreversible collapse for the monolayer, they do significantly decrease the collapse pressure relative to the other systems. Therefore, we observe three distinct collapse behaviors: (a) reversible; (b) irreversible; and (c) reversible at a reduced surface pressure.
Chin-Chang Kuo; Akihisa T Kodama; Thomas Boatwright; Michael Dennin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-24
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  -     ISSN:  1520-5827     ISO Abbreviation:  Langmuir     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-27     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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