Surface wave excitations and backflow effect over dense polymer brushes

Autor(en)

Sofia Biagi, Lorenzo Rovigatti, Francesco Sciortino, Chaouqi Misbah

Abstrakt

Polymer brushes are being increasingly used to tailor surface physicochemistry for diverse applications such as wetting, adhesion of biological objects, implantable devices and much more. Here we perform Dissipative Particle Dynamics simulations to study the behaviour of dense polymer brushes under flow in a slit-pore channel. We discover that the system displays flow inversion at the brush interface for several disconnected ranges of the imposed flow. We associate such phenomenon to collective polymer dynamics: a wave propagating on the brush surface. The relation between the wavelength, the amplitude and the propagation speed of the flow-generated wave is consistent with the solution of the Stokes equations when an imposed traveling wave is assumed as the boundary condition (the famous Taylor's swimmer).

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Centre National De La Recherche Scientifique (CNRS), Università degli Studi di Roma La Sapienza, Consiglio Nazionale delle Ricerche

Journal

Scientific Reports

Band

6

Anzahl der Seiten

6

ISSN

2045-2322

DOI

https://doi.org/10.1038/srep22257

Publikationsdatum

03-2016

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/b32eff50-ace1-4fa6-9c2a-97207b6629d6