Journal article

Millisecond CdS nanocrystal nucleation and growth studied by microfluidics with in situ spectroscopy

Susanne Seibt, Paul Mulvaney, Stephan Foerster

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | ELSEVIER SCIENCE BV | Published : 2019

Abstract

Microfluidic methods allowing fast mixing allow studying fast chemical reactions on the millisecond time scale. Here the kinetics of nucleation and growth of thioglycerol- and L-cysteine-capped CdS quantum dots is investigated using a continuous-flow microfluidic device in combination with in situ microscopy and spectroscopic techniques. A microfluidic device is developed to three-dimensionally focus a central aqueous Cd2+-stream, which is completely enclosed by a water buffer layer, into a stream of aqueous S2−. Diffusion-limited nucleation and growth of CdS nanoparticles occurs in the buffer layer downstream the reaction channel which can be followed by in situ confocal laser scanning micr..

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University of Melbourne Researchers

Grants

Awarded by ERC


Awarded by German Ministry BMBF


Awarded by German Science Foundation


Awarded by ARC Centre of Excellence in Exciton Science


Funding Acknowledgements

This work was financial supported by an ERC Advanced Grant (STREAM, #291211), by the German Ministry BMBF (#05K13WC5) and the German Science Foundation (DFG/GRK 1640). The authors acknowledge financial support by the German Academic Exchange Service (DAAD) through its Thematic Network Melbourne-Bayreuth Polymer/Colloid Network sponsored from funds of the Federal Ministry of Education and Research (BMBF). S.S. and P.M. acknowledges support through the ARC Centre of Excellence in Exciton Science (CE170100026). This work was performed in part at the Materials Characterisation and Fabrication Platform (MCFP) at the University of Melbourne and the Victorian Node of the Australian National Fabrication Facility (ANFF).