Gold Nanoparticles Immobilized on Stimuli Responsive Polymer Brushes as Nanosensors

2008 ◽  
Vol 41 (21) ◽  
pp. 8152-8158 ◽  
Author(s):  
Smrati Gupta ◽  
Mukesh Agrawal ◽  
Petra Uhlmann ◽  
Frank Simon ◽  
Ulrich Oertel ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Polymer Brushes ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

scholarly journals Conformation Study of Dual Stimuli-Responsive Core-Shell Diblock Polymer Brushes

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1084
Author(s):  
Kaimin Chen ◽  
Lan Cao ◽  
Ying Zhang ◽  
Kai Li ◽  
Xue Qin ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Core Shell ◽  
Stimuli Responsive ◽  
Research Topics ◽  
Design And Synthesis ◽  
Mild Conditions ◽  
The Core ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer ◽  
Shed Light

Stimuli-responsive nanoparticles are among the most popular research topics. In this study, two types of core-shell (polystyrene with a photoiniferter (PSV) as the core and diblock as the shell) polymer brushes (PSV@PNIPA-b-PAA and PSV@PAA-b-PNIPA) were designed and prepared using surface-initiated photoiniferter-mediated polymerization (SI-PIMP). Moreover, their pH- and temperature-stimuli responses were explored by dynamic light scattering (DLS) and turbidimeter under various conditions. The results showed that the conformational change was determined on the basis of the competition among electrostatic repulsion, hydrophobic interaction, hydrogen bonding, and steric hindrance, which was also confirmed by protein adsorption experiments. These results are not only helpful for the design and synthesis of stimuli-responsive polymer brushes but also shed light on controlled protein immobilization under mild conditions.

Grafting stimuli-responsive polymer brushes to freshly-etched porous silicon

2009 ◽  
Vol 6 (7) ◽  
pp. 1717-1720 ◽  
Author(s):  
Ester Segal ◽  
Loren A. Perelman ◽  
Troy Moore ◽  
Ellina Kesselman ◽  
Michael J. Sailor
Keyword(s):  
Porous Silicon ◽  
Polymer Brushes ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

scholarly journals Stimuli-Responsive Polymer Brushes for Flow Control through Nanopores

2012 ◽  
Vol 3 (2) ◽  
pp. 239-256 ◽  
Author(s):  
Shashishekar P. Adiga ◽  
Donald W. Brenner
Keyword(s):  
Flow Control ◽  
Polymer Brushes ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

Stimuli-Responsive Polymer Brushes

2009 ◽  
pp. 125-144 ◽  
Author(s):  
Edmondo Benetti ◽  
Melba Navarro ◽  
Szczepan Zapotoczny ◽  
G. Julius Vancso
Keyword(s):  
Polymer Brushes ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

Bioadhesion at micro-patterned stimuli-responsive polymer brushes

2005 ◽  
Vol 15 (21) ◽  
pp. 2089 ◽  
Author(s):  
Carolina de las Heras Alarcón ◽  
Tamer Farhan ◽  
Vicky L. Osborne ◽  
Wilhelm T. S. Huck ◽  
Cameron Alexander
Keyword(s):  
Polymer Brushes ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

scholarly journals Surface Modification of Silicon Nanowire Based Field Effect Transistors with Stimuli Responsive Polymer Brushes for Biosensing Applications

Micromachines ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 274 ◽  
Author(s):  
Stephanie Klinghammer ◽  
Sebastian Rauch ◽  
Sebastian Pregl ◽  
Petra Uhlmann ◽  
Larysa Baraban ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Silicon Nanowire ◽  
Solution Temperature ◽  
Stimuli Responsive ◽  
Force Microscopy ◽  
Reversible Phase Transition ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

We demonstrate the functionalization of silicon nanowire based field effect transistors (SiNW FETs) FETs with stimuli-responsive polymer brushes of poly(N-isopropylacrylamide) (PNIPAAM) and poly(acrylic acid) (PAA). Surface functionalization was confirmed by atomic force microscopy, contact angle measurements, and verified electrically using a silicon nanowire based field effect transistor sensor device. For thermo-responsive PNIPAAM, the physicochemical properties (i.e., a reversible phase transition, wettability) were induced by crossing the lower critical solution temperature (LCST) of about 32 °C. Taking advantage of this property, osteosarcomic SaoS-2 cells were cultured on PNIPAAM-modified sensors at temperatures above the LCST, and completely detached by simply cooling. Next, the weak polyelectrolyte PAA, that is sensitive towards alteration of pH and ionic strength, was used to cover the silicon nanowire based device. Here, the increase of pH will cause deprotonation of the present carboxylic (COOH) groups along the chains into negatively charged COO− moieties that repel each other and cause swelling of the polymer. Our experimental results suggest that this functionalization enhances the pH sensitivity of the SiNW FETs. Specific receptor (bio-)molecules can be added to the polymer brushes by simple click chemistry so that functionality of the brush layer can be tuned optionally. We demonstrate at the proof-of concept-level that osteosarcomic Saos-2 cells can adhere to PNIPAAM-modified FETs, and cell signals could be recorded electrically. This study presents an applicable route for the modification of highly sensitive, versatile FETs that can be applied for detection of a variety of biological analytes.

Chain Extension of Stimuli-Responsive Polymer Brushes: A General Strategy to Overcome the Drawbacks of the “Grafting-To” Approach

2013 ◽  
Vol 23 (45) ◽  
pp. 5675-5681 ◽  
Author(s):  
Sebastian Rauch ◽  
Klaus-Jochen Eichhorn ◽  
Dirk Kuckling ◽  
Manfred Stamm ◽  
Petra Uhlmann
Keyword(s):  
Polymer Brushes ◽  
Chain Extension ◽  
General Strategy ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

Adsorption of enzymes to stimuli-responsive polymer brushes: Influence of brush conformation on adsorbed amount and biocatalytic activity

2016 ◽  
Vol 146 ◽  
pp. 737-745 ◽  
Author(s):  
Meike Koenig ◽  
Eva Bittrich ◽  
Ulla König ◽  
Bhadra Lakshmi Rajeev ◽  
Martin Müller ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Stimuli Responsive ◽  
Adsorbed Amount ◽  
Responsive Polymer ◽  
Stimuli Responsive Polymer

Self-Cleaning and Anti-Fog Surfaces via Stimuli-Responsive Polymer Brushes

2007 ◽  
Vol 19 (22) ◽  
pp. 3838-3843 ◽  
Author(s):  
J. A. Howarter ◽  
J. P. Youngblood
Keyword(s):  
Polymer Brushes ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Self Cleaning ◽  
Stimuli Responsive Polymer
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