Specific ion modulated thermoresponse of poly(N-isopropylacrylamide) brushes
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چکیده
منابع مشابه
Specific ion modulated thermoresponse of poly(N-isopropylacrylamide) brushes.
The influence of specific anions on the equilibrium thermoresponse of poly(N-isopropylacrylamide) (pNIPAM) brushes has been studied using in situ ellipsometry, quartz crystal microbalance with dissipation (QCM-D) and static contact angle measurements between 20 and 45 °C in the presence of up to 250 mM acetate and thiocyanate anions in water. The thickness and changes in dissipation exhibited a...
متن کاملCollapse and swelling of thermally sensitive poly(N-isopropylacrylamide) brushes monitored with a quartz crystal microbalance.
Thermally sensitive poly(N-isopropylacrylamide) (PNIPAM) brushes grafted on SiO2-coated quartz crystal surface were prepared with a surface-immobilized initiator. Using quartz crystal microbalance (QCM), we investigated the collapse and swelling of the brushes in water in real time. Both frequency and dissipation of PNIPAM brushes were found to gradually change throughout a temperature range 20...
متن کاملCollapse from the top: brushes of poly(N-isopropylacrylamide) in co-nonsolvent mixtures.
Using a combination of ellipsometry and friction force microscopy, we study the reversible swelling, collapse and variation in friction properties of covalently bound poly(N-isopropylacrylamide) (PNIPAM) layers on silicon with different grafting densities in response to exposure to good solvents and co-nonsolvent mixtures. Changes in the thickness and segment density distribution of grafted fil...
متن کاملPatterned poly(N-isopropylacrylamide) brushes on silica surfaces by microcontact printing followed by surface-initiated polymerization.
Patterned poly(N-isopropylacrylamide) (PNIPAAm) brushes were fabricated on oxidized silicon wafers by surface-initiated atom transfer radical polymerization of N-isopropylacrylamide from a micropatterned initiator. The patterned surface initiator was prepared by microcontact-printing octadecyltrichlorosilane and backfilling with 3-(aminopropyl)triethoxysilane followed by amidization with 2-brom...
متن کاملEnd-functional Poly(N-isopropylacrylamide) Brushes for Efficiently Promoting Cell Adhesion and Detachment
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ژورنال
عنوان ژورنال: Physical Chemistry Chemical Physics
سال: 2016
ISSN: 1463-9076,1463-9084
DOI: 10.1039/c5cp07468a