title: A nanoliter-scale open chemical reactor.
abstract: An open chemical reactor is a container that exchanges matter with the exterior. Well-mixed open chemical reactors, called continuous stirred tank reactors (CSTR), have been instrumental for investigating the dynamics of out-of-equilibrium chemical processes, such as oscillations, bistability, and chaos. Here, we introduce a microfluidic CSTR, called μCSTR, that reduces reagent consumption by six orders of magnitude. It consists of an annular reactor with four inlets and one outlet fabricated in PDMS using multi-layer soft lithography. A monolithic peristaltic pump feeds fresh reagents into the reactor through the inlets. After each injection the content of the reactor is continuously mixed with a second peristaltic pump. The efficiency of the μCSTR is experimentally characterized using a bromate, sulfite, ferrocyanide pH oscillator. Simulations accounting for the digital injection process are in agreement with experimental results. The low consumption of the μCSTR will be advantageous for investigating out-of-equilibrium dynamics of chemical processes involving biomolecules. These studies have been scarce so far because a miniaturized version of a CSTR was not available.
authors.affiliation: Laboratoire de photonique et de nanostructures, CNRS, Marcoussis, France. Jean-Christophe.Galas@lpn.cnrs.fr
authors.forename: Jean-Christophe
authors.initials: JC
authors.lastname: Galas
authors.forename: Anne-Marie
authors.initials: AM
authors.lastname: Haghiri-Gosnet
authors.forename: André
authors.initials: A
authors.lastname: Estévez-Torres