Continuous microfluidic synthesis and functionalization of gold nanorods

[Display omitted] •The continuous synthesis and functionalization of gold nanorods is achieved.•A 100-fold reduction in PEG consumption is possible by using microfluidics.•The system facilitates tuning the concentration of halides to modify the nanorods. A microfluidic platform with multiple reactan...

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Published inChemical engineering journal (Lausanne, Switzerland : 1996) Vol. 285; pp. 286 - 292
Main Authors Uson, Laura, Sebastian, Victor, Arruebo, Manuel, Santamaria, Jesus
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.2016
Subjects
Gold nanorods
Microfluidics
PEG
Plasmonics
PEG
Gold nanorods
Plasmonics
Microfluidics
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Summary:[Display omitted] •The continuous synthesis and functionalization of gold nanorods is achieved.•A 100-fold reduction in PEG consumption is possible by using microfluidics.•The system facilitates tuning the concentration of halides to modify the nanorods. A microfluidic platform with multiple reactant additions has been used for the continuous, unseeded synthesis of gold nanorods. This system allows separate control of the seed forming and nanorod growing stages, increasing reproducibility and reducing undesired effects related to a poor control of the seed aging stage. Also, on-stream surface functionalization with poly(ethylene glycol)-methyl ether thiol (SH-PEG) has been performed, allowing a 100-fold reduction in the consumption of this reactant compared to the amounts used in a conventional batch reactor. The system also facilitates tuning the concentration of halide anions (Cl− and Br−) that are used to modify the aspect ratio of the resulting rods.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2015.09.103