Uniform integration of gold nanoparticles in PDMS microfluidics with 3D micromixing. (21st August 2015)

• Record Type: Journal Article
• Authors: SadAbadi, H; Packirisamy, M; Wuthrich, R
• Is Part Of: Journal of micromechanics and microengineering. Volume 25:Number 9(2015:Sep.)
• Publication Date: 2015-08-21
• Subjects: Au-PDMS nanocomposite -- microfluidics -- microreactor integrated micromixer -- biosensing; Microelectromechanical systems -- Periodicals; Micromechanics -- Periodicals; 621.38105
• DOI: 10.1088/0960-1317/25/9/094006
• Languages: English
• ISSNs: 0960-1317

Abstract

Abstract: The integration of gold nanoparticles (AuNPs) on the surface of polydimethylsiloxane (PDMS) microfluidics for biosensing applications is a challenging task. In this paper we address this issue by integration of pre-synthesized AuNPs (in a microreactor) into a microfluidic system. This method explored the affinity of AuNPs toward the PDMS surface so that the pre-synthesized particles will be adsorbed onto the channel walls. AuNPs were synthesized inside a microreactor before integration. In order to improve the size uniformity of the synthesized AuNPs and also to provide full mixing of reactants, a 3D-micromixer was designed, fabricated and then integrated with the microreactor in a single platform. SEM and UV/Vis spectroscopy were used to characterize the AuNPs on the PDMS surface.