Integration of Porous Layers in Ordered Pillar Arrays for Liquid Chromatography

Wim de Malsche, David Clicq, Vincent Verdoold, Piotr Gzil, Gert Desmet, Johannes G.E. Gardeniers

Research output: Contribution to journalArticleAcademicpeer-review

49 Citations (Scopus)

Abstract

The present paper describes a method for the production of partly porous micro-pillars in columns suitable for use in liquid chromatography. These layers increase the available surface at least two orders of magnitude without destroying the huge benefits of the ordered nature of the system. A process flow was developed that enabled us to create a 550 nm thick porous layer on the pillar array in a sealed channel configuration, withstanding pressures up to at least 70 bar. Measuring band broadening under non-retained conditions, only a modest increase in plate height was observed in the porous pillar array as compared to that in a non-porous pillar array. The homogeneity of the layers was demonstrated using an optical microscope and SEM pictures and by monitoring peak velocities at constant pressures. The internal porosity was determined using particles with a diameter larger than the mesopores in combination with a dye that could penetrate into the pores.
Original languageUndefined
Pages (from-to)-
JournalLab on a chip
Volume7
Issue number12
DOIs
Publication statusPublished - 2007

Keywords

  • IR-67274
  • METIS-245009

Cite this

de Malsche, Wim ; Clicq, David ; Verdoold, Vincent ; Gzil, Piotr ; Desmet, Gert ; Gardeniers, Johannes G.E. / Integration of Porous Layers in Ordered Pillar Arrays for Liquid Chromatography. In: Lab on a chip. 2007 ; Vol. 7, No. 12. pp. -.
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Integration of Porous Layers in Ordered Pillar Arrays for Liquid Chromatography. / de Malsche, Wim; Clicq, David; Verdoold, Vincent; Gzil, Piotr; Desmet, Gert; Gardeniers, Johannes G.E.

In: Lab on a chip, Vol. 7, No. 12, 2007, p. -.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Integration of Porous Layers in Ordered Pillar Arrays for Liquid Chromatography

AU - de Malsche, Wim

AU - Clicq, David

AU - Verdoold, Vincent

AU - Gzil, Piotr

AU - Desmet, Gert

AU - Gardeniers, Johannes G.E.

PY - 2007

Y1 - 2007

N2 - The present paper describes a method for the production of partly porous micro-pillars in columns suitable for use in liquid chromatography. These layers increase the available surface at least two orders of magnitude without destroying the huge benefits of the ordered nature of the system. A process flow was developed that enabled us to create a 550 nm thick porous layer on the pillar array in a sealed channel configuration, withstanding pressures up to at least 70 bar. Measuring band broadening under non-retained conditions, only a modest increase in plate height was observed in the porous pillar array as compared to that in a non-porous pillar array. The homogeneity of the layers was demonstrated using an optical microscope and SEM pictures and by monitoring peak velocities at constant pressures. The internal porosity was determined using particles with a diameter larger than the mesopores in combination with a dye that could penetrate into the pores.

AB - The present paper describes a method for the production of partly porous micro-pillars in columns suitable for use in liquid chromatography. These layers increase the available surface at least two orders of magnitude without destroying the huge benefits of the ordered nature of the system. A process flow was developed that enabled us to create a 550 nm thick porous layer on the pillar array in a sealed channel configuration, withstanding pressures up to at least 70 bar. Measuring band broadening under non-retained conditions, only a modest increase in plate height was observed in the porous pillar array as compared to that in a non-porous pillar array. The homogeneity of the layers was demonstrated using an optical microscope and SEM pictures and by monitoring peak velocities at constant pressures. The internal porosity was determined using particles with a diameter larger than the mesopores in combination with a dye that could penetrate into the pores.

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