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|a eng
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| 100 |
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|a Tixier, T
|e verfasserin
|4 aut
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| 245 |
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|a Spontaneous size selection in cholesteric and nematic emulsions
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|c 2006
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 16.05.2007
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|a Date Revised 21.02.2006
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a We study the spontaneous size selection in lyotropic cholesteric (W/O) and thermotropic nematic (O/W) liquid crystal emulsions. The droplet sizes have been characterized by dynamic light scattering, which indicates a narrow monomodal distribution of droplets achieved spontaneously even without emulsion filtration. Anchoring of the director, provided by the chosen surfactant on the interface, may generate a topological defect inside the droplet. Below the critical radius R = K/W, determined by the ratio of Frank elastic and the surface anchoring constants, the effective anchoring strength is weak and droplets are not topologically charged; this allows them to coalesce freely, depleting the size distribution in this range. Large droplets possess a topological charge of +1 and present a high elastic energy barrier for pair coalescence; the resulting size distribution is skewed, with R > R, and effectively frozen
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|a Journal Article
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|a Heppenstall-Butler, M
|e verfasserin
|4 aut
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|a Terentjev, E M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1991
|g 22(2006), 5 vom: 28. Feb., Seite 2365-70
|w (DE-627)NLM098181009
|x 0743-7463
|7 nnns
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| 773 |
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|g volume:22
|g year:2006
|g number:5
|g day:28
|g month:02
|g pages:2365-70
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|d 22
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