Nanostructured Polymer Brushes by UV-Assisted Imprint Lithography and Surface-Initiated Polymerization for Biological Functions

2011 ◽  
Vol 21 (11) ◽  
pp. 2088-2095 ◽  
Author(s):  
Edmondo M. Benetti ◽  
Canet Acikgoz ◽  
Xiaofeng Sui ◽  
Boris Vratzov ◽  
Mark A. Hempenius ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Biological Functions ◽  
Imprint Lithography ◽  
Surface Initiated Polymerization ◽  
Nanostructured Polymer

Nanostructured Polymer Brushes With Reversibly Changing Properties

2002 ◽  
Vol 727 ◽  
Author(s):  
Denys Usov ◽  
Manfred Stamm ◽  
Sergiy Minko ◽  
Christian Froeck ◽  
Andreas Scholl ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Phase Segregation ◽  
Water Contact ◽  
Angle Measurements ◽  
Nanostructured Polymer ◽  
Contact Angle Measurements ◽  
Vertical Segregation ◽  
Oxygen Plasma Etching ◽  
Grafting From ◽  
Photoemission Electron

AbstractWe investigated the interplay between different mechanisms of the lateral and vertical segregation in the synthesized via “grafting from” approach symmetric A/B (where A and B are poly(styrene-co-2,3,4,5,6-pentafluorostyrene) and poly(methylmethacrylate), respectively) polymer brushes upon exposure to different solvents. We used X-ray photoemission electron spectroscopy and microscopy (X-PEEM), AFM, water contact angle measurements, and oxygen plasma etching to study morphology of the brushes. The ripple morphology after toluene (nonselective solvent) revealed elongated lamellar-like domains of A and B polymers alternating across the surface. The dimple-A morphology consisting of round clusters of the polymer A was observed after acetone (selective solvent for B). The top layer was enriched with the polymer B showing that the brush underwent both the lateral and vertical phase segregation. A qualitative agreement with predictions of SCF theory was found.

scholarly journals Design and Fabrication by Thermal Imprint Lithography and Mechanical Characterization of a Ring-Based PDMS Soft Probe for Sensing and Actuating Forces in Biological Systems

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 424 ◽  
Author(s):  
Tommaso Dattoma ◽  
Antonio Qualtieri ◽  
Gianmichele Epifani ◽  
Massimo De Vittorio ◽  
Francesco Rizzi
Keyword(s):  
Mechanical Characterization ◽  
Biological Systems ◽  
Fem Analysis ◽  
Geometrical Parameters ◽  
Biological Functions ◽  
Imprint Lithography ◽  
Wide Range ◽  
Experimental Tool ◽  
Contact Section

In this paper, the design, fabrication and mechanical characterization of a novel polydimethylsiloxane (PDMS) soft probe for delivering and sensing forces in biological systems is proposed. On the basis of preliminary finite element (FEM) analysis, the design takes advantage of a suitable core geometry, characterized by a variable spring-like ring. The compliance of probes can be finely set in a wide range to measure forces in the micronewton to nanonewton range. In particular, this is accomplished by properly resizing the ring geometry and/or exploiting the mixing ratio-based elastic properties of PDMS. Fabrication by the thermal imprint lithography method allows fast and accurate tuning of ring sizes and tailoring of the contact section to their targets. By only varying geometrical parameters, the stiffness ranges from 1080 mNm−1 to 50 mNm−1, but by changing the base-curing agent proportion of the elastomer from 10:1 to 30:1, the stiffness drops to 37 mNm−1. With these compliances, the proposed device will provide a new experimental tool for investigating force-dependent biological functions in sensory systems.

Influence of Surface-Initiated Polymerization Rate and Initiator Density on the Properties of Polymer Brushes

2009 ◽  
Vol 42 (7) ◽  
pp. 2863-2872 ◽  
Author(s):  
Hong Liu ◽  
Min Li ◽  
Zhong-Yuan Lu ◽  
Zuo-Guang Zhang ◽  
Chia-Chung Sun
Keyword(s):  
Polymer Brushes ◽  
Polymerization Rate ◽  
Surface Initiated Polymerization

Surface-initiated polymerization of A–A/B–B type conjugated monomers by palladium-catalyzed Stille polycondensation: towards low band gap polymer brushes

RSC Advances ◽  
2015 ◽  
Vol 5 (96) ◽  
pp. 78436-78440 ◽  
Author(s):  
Hussein Awada ◽  
Antoine Bousquet ◽  
Christine Dagron-Lartigau ◽  
Laurent Billon
Keyword(s):  
Band Gap ◽  
Polymer Brushes ◽  
Photophysical Properties ◽  
Zno Nanorods ◽  
Shell Nanoparticles ◽  
Low Band Gap ◽  
Surface Initiated Polymerization ◽  
Palladium Catalyzed ◽  
Stille Polycondensation ◽  
Low Band Gap Polymer

A surface-initiated Stille polycondensation from Pd catalyst-immobilized ZnO nanorods affords well-defined core–shell nanoparticles. For the first time, a low band gap polymer was anchored on ZnO nanorods to create hybrid materials with tunable photophysical properties.

Polymer Brushes by Living Anionic Surface Initiated Polymerization on Flat Silicon (SiOx) and Gold Surfaces:  Homopolymers and Block Copolymers

Langmuir ◽  
2002 ◽  
Vol 18 (22) ◽  
pp. 8672-8684 ◽  
Author(s):  
Rigoberto Advincula ◽  
Qingye Zhou ◽  
Mikyoung Park ◽  
Shuangxi Wang ◽  
Jimmy Mays ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Polymer Brushes ◽  
Gold Surfaces ◽  
Surface Initiated Polymerization ◽  
Anionic Surface

scholarly journals Nanostructured polymer brushes and protein density gradients on diamond by carbon templating

Soft Matter ◽  
2011 ◽  
Vol 7 (10) ◽  
pp. 4861 ◽  
Author(s):  
Naima A. Hutter ◽  
Marin Steenackers ◽  
Andreas Reitinger ◽  
Oliver A. Williams ◽  
Jose A. Garrido ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Density Gradients ◽  
Nanostructured Polymer ◽  
Protein Density

Graphene Functionalized with Azo Polymer Brushes: Surface-Initiated Polymerization and Photoresponsive Properties

2011 ◽  
Vol 23 (9) ◽  
pp. 1122-1125 ◽  
Author(s):  
Dongrui Wang ◽  
Gang Ye ◽  
Xiaolin Wang ◽  
Xiaogong Wang
Keyword(s):  
Polymer Brushes ◽  
Surface Initiated Polymerization ◽  
Azo Polymer
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