Laser ablation and injection moulding as techniques for producing micro channels compatible with Small Angle X-Ray Scattering

R. Haider, B. Marmiroli, I. Gavalas, M. Wolf, M. Matteucci, R. Taboryski, A. Boisen, E. Stratakis, H. Amenitsch

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

Microfluidic mixing is an important means for in-situ sample preparation and handling while Small Angle X-Ray Scattering (SAXS) is a proven tool for characterising (macro-)molecular structures. In combination those two techniques enable investigations of fast reactions with high time resolution (<1 ms). The goal of combining a micro mixer with SAXS, however, puts constraints on the materials and production methods used in the device fabrication. The measurement channel of the mixer needs good X-ray transparency and a low scattering background. While both depend on the material used, the requirement for low scattering especially limits the techniques suitable for producing the mixer, as the fabrication process can induce molecular orientations and stresses that can adversely influence the scattering signal. Not only is it important to find a production method that results in a device with low background scattering, but it also has to be versatile enough to produce appropriate mixer designs. Here we discuss two methods – laser ablation of polycarbonate and injection moulding of Topas – which were found suitable for our needs, provided care is taken in aligning the mixing/reaction channel, where the actual measurements will be carried out. We find injection moulding to be the better of the two methods.

Originalspracheenglisch
Seiten (von - bis)7-12
Seitenumfang6
FachzeitschriftMicroelectronic Engineering
Jahrgang195
DOIs
PublikationsstatusVeröffentlicht - 5 Aug 2018

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injection molding
Laser ablation
X ray scattering
Injection molding
laser ablation
Scattering
polycarbonate
scattering
production engineering
x rays
Fabrication
Molecular orientation
Polycarbonates
Microfluidics
Transparency
Molecular structure
Macros
fabrication
polycarbonates
X rays

Schlagwörter

    ASJC Scopus subject areas

    • !!Electronic, Optical and Magnetic Materials
    • !!Atomic and Molecular Physics, and Optics
    • !!Condensed Matter Physics
    • !!Surfaces, Coatings and Films
    • !!Electrical and Electronic Engineering

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    Laser ablation and injection moulding as techniques for producing micro channels compatible with Small Angle X-Ray Scattering. / Haider, R.; Marmiroli, B.; Gavalas, I.; Wolf, M.; Matteucci, M.; Taboryski, R.; Boisen, A.; Stratakis, E.; Amenitsch, H.

    in: Microelectronic Engineering, Jahrgang 195, 05.08.2018, S. 7-12.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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    AU - Matteucci, M.

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