Details

Autor(en) / Beteiligte

• Eddington, David T.
• Puccinelli, John P.
• Beebe, David J.

Titel

Thermal aging and reduced hydrophobic recovery of polydimethylsiloxane

Ist Teil von

• Sensors and actuators. B, Chemical, 2006-03, Vol.114 (1), p.170-172

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2006

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Rapid prototyping of polydimethylsiloxane (PDMS) is frequently used to build microfluidic devices. PDMS is inherently hydrophobic; however, the surface can be temporarily rendered hydrophilic by exposing the surface to an oxygen plasma. Hydrophilic microchannels are sometimes advantageous over hydrophobic microchannels due to increased cell adhesion to hydrophilic surfaces or less air bubble trapping during filling with aqueous solution. However, the hydrophilic surface is unstable and low molecular weight (LMW) chains diffuse from the bulk of the PDMS and cover up the thermodynamically unstable surface. However, eliminating LMW species through thermal aging allows the hydrophilic surface to be more permanent.