Controlled Synthesis of Photochromic Polymer Brushes by Atom Transfer Radical Polymerization

2006 ◽  
Vol 39 (3) ◽  
pp. 915-922 ◽  
Author(s):  
Martin Piech ◽  
Nelson S. Bell
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Polymer Brushes ◽  
Controlled Synthesis ◽  
Atom Transfer ◽  
Photochromic Polymer

Versatile procedure for site-specific grafting of polymer brushes on patchy particles via atom transfer radical polymerization (ATRP)

2016 ◽  
Vol 7 (16) ◽  
pp. 2858-2869 ◽  
Author(s):  
Bas G. P. van Ravensteijn ◽  
Willem K. Kegel
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Polymer Brushes ◽  
Building Blocks ◽  
Atom Transfer ◽  
Site Specific ◽  
Patchy Particles

Combining chemically anisotropic colloids with Surface-Initiated ATRP enables for site-specific grafting of p(NIPAM) brushes. The resulting, partially grafted particles are employed as colloidal building blocks for finite-sized clusters.

Stability and Cell Adhesion Properties of Poly(N-isopropylacrylamide) Brushes with Variable Grafting Densities

2011 ◽  
Vol 64 (9) ◽  
pp. 1261 ◽  
Author(s):  
Xiaofeng Sui ◽  
Andrea Di Luca ◽  
Michel Klein Gunnewiek ◽  
E. Stefan Kooij ◽  
Clemens A. van Blitterswijk ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Lower Critical Solution Temperature ◽  
Polymer Brushes ◽  
Pure Water ◽  
Solution Temperature ◽  
Atom Transfer ◽  
Adhesion Properties ◽  
Critical Solution Temperature

Poly(N-isopropylacrylamide) brushes with three different grafting densities were synthesized via surface-initiated atom-transfer radical polymerization on glass or on silicon substrates. The substrates were modified with monochlorosilane-based or trimethoxysilane-based atom-transfer radical polymerization initiators. Atomic force microscopy images showed detachment of brushes from the monochlorosilane-based system under cell culture conditions. In situ ellipsometry demonstrated the reversible swelling and collapse of the brushes as the temperature was varied across the lower critical solution temperature of poly(N-isopropylacrylamide) in pure water. The polymer brushes were evaluated as supporting substrates for MC-3T3 cell cultures. At 37°C (T>lower critical solution temperature), the seeded cells adhered, spread, and proliferated, whereas at 25°C (T<lower critical solution temperature), the cells detached from the surface. The low-density polymer brush showed the highest cell adhesion, featuring adhering cells with an elongated morphology.

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