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Issue 5, 2007
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Glass microfabricated nebulizer chip for mass spectrometry

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Abstract

A microfluidic nebulizer chip for mass spectrometry is presented. It is an all-glass device which consists of fusion bonded Pyrex wafers with embedded flow channels and a nozzle at the chip edge. A platinum heater is located on the wafer backside. Fabrication of the chip is detailed, especially glass deep etching, wafer bonding, and metal patterning. Various process combinations of bonding and metallization have been considered (anodic bonding vs. fusion bonding; heater inside/outside channel; metallization before/after bonding; platinum lift-off vs. etching). The chip vaporizes the liquid sample (0.1–10 μL min−1) and mixes it with a nebulizer gas (ca. 100 sccm N2). Operating temperatures can go up to 500 °C ensuring efficient vaporization. Thermal insulation of the glass ensures low temperatures at the far end of the chip, enabling easy interconnections.

Graphical abstract: Glass microfabricated nebulizer chip for mass spectrometry

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Publication details

The article was received on 04 Jan 2007, accepted on 13 Mar 2007 and first published on 04 Apr 2007


Article type: Technical Note
DOI: 10.1039/B700101K
Citation: Lab Chip, 2007,7, 644-646
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    Glass microfabricated nebulizer chip for mass spectrometry

    V. Saarela, M. Haapala, R. Kostiainen, T. Kotiaho and S. Franssila, Lab Chip, 2007, 7, 644
    DOI: 10.1039/B700101K

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