Rapid synthesis of gold nanoparticles with carbon monoxide in a microfluidic segmented flow system. Issue 5 (5th April 2019)

• Record Type: Journal Article
• Authors: Huang, He; du Toit, Hendrik; Ben-Jaber, Sultan; Wu, Gaowei; Panariello, Luca; Thanh, Nguyen Thi Kim; Parkin, Ivan P.; Gavriilidis, Asterios
• Is Part Of: Reaction chemistry & engineering. Volume 4:Issue 5(2019)
• Page Start: 884
• Page End: 890
• Publication Date: 2019-04-05
• Subjects: Reaction mechanisms (Chemistry) -- Periodicals; Chemical engineering -- Periodicals; Chemical engineering; Reaction mechanisms (Chemistry); Periodicals; 547.705
• DOI: 10.1039/c8re00351c
• Languages: English
• ISSNs: 2058-9883

Abstract

Abstract : A microfluidic reactor offers a controllable and convenient platform for fast synthesis of gold nanoparticles with carbon monoxide. Abstract : A microfluidic reactor was developed to enhance the speed (reaction time <4 min) and control of the synthesis of gold nanoparticles (3–25 nm) with or without capping agents using carbon monoxide as gaseous reductant, which is easy to remove from the reaction mixture by venting. Gas–liquid segmented flow was formed inside a 1 mm inner diameter coiled flow inverter with aqueous gold precursor and the reducing gas to produce gold nanoparticles with polydispersity as low as 5%. The uncapped gold nanoparticles make the product attractive for surface-enhanced Raman scattering, and showed an average enhancement factor of 1.94 × 10 5 . Various capping agents (tri-sodium citrate, polysorbate 80, oleylamine and poly(ethyleneglycol) 2-mercaptoethyl ether acetic acid) and different operational parameters were also tested, demonstrating that the proposed synthesis is flexible and can continuously produce a variety of gold nanoparticles, with potential for other applications.