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Insight into the Permeation Barrier of Glued Langmuir−Blodgett Bilayers
Insight into the Permeation Barrier of Glued Langmuir−Blodgett Bilayers
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Donald H. McCullough, III,† Ruslan Grygorash,‡ James T. Hsu,† and Steven L. Regen*‡
2007
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Permeation measurements have been made for He, CO2, and N2 across single Langmuir?Blodgett (LB) bilayers derived from 1,2,4,5-tetrakis[(N-(undecanoamidoethyl)-N,N-dimethyl ammonium) methyl]benzene tetrabromide (2) and 1,2,4,5-tetrakis[(N-(perfluoroundecanoamidoethyl)-N,N-dimethyl ammonium)methyl]benzene tetrabromide (3) in the absence and in the presence of entrapped poly(acrylic acid) (PAA). In the absence of PAA, single LB bilayers of 3 show a higher permeance for He and N2 but a lower permeat...
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