Windowless microfluidic platform based on capillary burst valves for high intensity x-ray measurements.
We propose and describe a microfluidic system for high intensity x-ray measurements. The required open access to a microfluidic channel is provided by an out-of-plane capillary burst valve (CBV). The functionality of the out-of-plane CBV is characterized with respect to the diameter of the windowless access hole, ranging from 10 to 130 microm. Maximum driving pressures from 22 to 280 mbar corresponding to refresh rates of the exposed sample from 300 Hz to 54 kHz is demonstrated. The microfluidic system is tested at beamline ID09b at the ESRF synchrotron radiation facility in Grenoble, and x-ray scattering measurements are shown to be feasible and to require only very limited amounts of sample, <1 ml/h of measurements without recapturing of sample. With small adjustments of the present chip design, scattering angles up to 30 degrees can be achieved without shadowing effects and integration on-chip mixing and spectroscopy appears straightforward.
Vig
Asger Laurberg
AL
Department of Micro and Nanotechnology, DTU Nanotech, Technical University of Denmark, Building 345east, DK-2800 Kongens Lyngby, Denmark.
Haldrup
Kristoffer
K
Enevoldsen
Nikolaj
N
Thilsted
Anil Haraksingh
AH
Eriksen
Johan
J
Kristensen
Anders
A
Feidenhans'l
Robert
R
Nielsen
Martin Meedom
MM
D004867:Equipment Design; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation* / Q000379:methods*; D008853:Microscopy; D055616:Microtechnology; D014867:Water; D014961:X-Ray Diffraction; D014965:X-Rays
D014867:Water