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Controlled synthesis of compound semiconductor nanoparticles using microfluidic reactors

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6 Author(s)
Edel, J.B. ; Dept. of Chem., Imperial Coll. London, UK ; Krishnadasan, S. ; cao-Romero, J.T. ; Vilar-Compte, R.
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We describe the use of continuous-flow, microfluidic reactors for the controllable synthesis of compound semiconductor nanoparticles. Specifically, CdS nanoparticles are synthesised by rapid mixing of Na/sub 2/S and Cd(NO/sub 3/)/sub 2/.4H/sub 2/O flow streams within a silicon/glass micromixer based on the principle of flow lamination. Room temperature syntheses at a variety of volumetric flow rates yield CdS nanoparticles of variable polydispersity. Analysis of absorption spectra of the CdS nanoparticles suggests that varying volumetric flow rates of reagent streams provides a simple and direct method of controlling population dispersity. Simple, single layer glass microstructures are also used to synthesis CdSe nanoparticles in continuous flow at temperatures between 180 and 240/spl deg/C.

Published in:

TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003  (Volume:2 )

Date of Conference:

8-12 June 2003