Pulsating pH-Responsive Nanogels

A novel method is presented for the design of robust, sustained nanochemomechanical oscillators. The approach is based on the switching of chemoresponsive nanogel beads between their collapsed and swollen state by coupling them to an appropriately chosen nonlinear reaction. The presented system util...

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Bibliographic Details
Published inThe journal of physical chemistry. B Vol. 110; no. 41; pp. 20297 - 20301
Main Authors Varga, Imre, Szalai, István, Mészaros, Robert, Gilányi, Tibor
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 19.10.2006
Subjects
Biophysics - methods
Chemistry, Physical - methods
Equipment Design
Gels - chemistry
Hydrogen-Ion Concentration
Ions
Light
Models, Chemical
Nanoparticles - chemistry
Nanotechnology - methods
Oscillometry
Scattering, Radiation
Surface-Active Agents - chemistry
Temperature
Time Factors
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Summary:A novel method is presented for the design of robust, sustained nanochemomechanical oscillators. The approach is based on the switching of chemoresponsive nanogel beads between their collapsed and swollen state by coupling them to an appropriately chosen nonlinear reaction. The presented system utilizes a proton activated oscillatory reaction and pH-sensitive nanobeads of gel that provide more than an order of magnitude volume change. A key point of our approach is the control of the colloid stability of the nanobeads of gel in a wide range of experimental parameters (pH, ionic strength, temperature) without interfering with the swelling characteristics of the nanogel particles. This was achieved by utilizing the interaction of nanogels with ionic surfactants.
Bibliography:istex:DF41B86D5F2DCBF62A8F778606F1EB3471199116
ark:/67375/TPS-B0MKLSXC-N
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ISSN:1520-6106
1520-5207
DOI:10.1021/jp064282m