title: A Microfluidic Platform for Precision Small-volume Sample Processing and Its Use to Size Separate Biological Particles with an Acoustic Microdevice.
abstract: A major advantage of microfluidic devices is the ability to manipulate small sample volumes, thus reducing reagent waste and preserving precious sample. However, to achieve robust sample manipulation it is necessary to address device integration with the macroscale environment. To realize repeatable, sensitive particle separation with microfluidic devices, this protocol presents a complete automated and integrated microfluidic platform that enables precise processing of 0.15-1.5 ml samples using microfluidic devices. Important aspects of this system include modular device layout and robust fixtures resulting in reliable and flexible world to chip connections, and fully-automated fluid handling which accomplishes closed-loop sample collection, system cleaning and priming steps to ensure repeatable operation. Different microfluidic devices can be used interchangeably with this architecture. Here we incorporate an acoustofluidic device, detail its characterization, performance optimization, and demonstrate its use for size-separation of biological samples. By using real-time feedback during separation experiments, sample collection is optimized to conserve and concentrate sample. Although requiring the integration of multiple pieces of equipment, advantages of this architecture include the ability to process unknown samples with no additional system optimization, ease of device replacement, and precise, robust sample processing.
authors.affiliation: Materials Engineering Division, Lawrence Livermore National Laboratory; Department of Biomedical Engineering, Boston University.
authors.forename: Erika J
authors.initials: EJ
authors.lastname: Fong
authors.affiliation: Materials Engineering Division, Lawrence Livermore National Laboratory.
authors.forename: Chao
authors.initials: C
authors.lastname: Huang
authors.affiliation: Materials Engineering Division, Lawrence Livermore National Laboratory.
authors.forename: Julie
authors.initials: J
authors.lastname: Hamilton
authors.affiliation: Materials Engineering Division, Lawrence Livermore National Laboratory.
authors.forename: William J
authors.initials: WJ
authors.lastname: Benett
authors.affiliation: Materials Engineering Division, Lawrence Livermore National Laboratory.
authors.forename: Mihail
authors.initials: M
authors.lastname: Bora
authors.affiliation: Materials Engineering Division, Lawrence Livermore National Laboratory.
authors.forename: Alison
authors.initials: A
authors.lastname: Burklund
authors.affiliation: Materials Engineering Division, Lawrence Livermore National Laboratory.
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Metz
authors.affiliation: Materials Engineering Division, Lawrence Livermore National Laboratory; shusteff1@llnl.gov.
authors.forename: Maxim
authors.initials: M
authors.lastname: Shusteff