Issue 19, 2014

A superhydrophobic chip based on SU-8 photoresist pillars suspended on a silicon nitride membrane

Abstract

We developed a new generation of superhydrophobic chips optimized for probing ultrasmall sample quantities by X-ray scattering and fluorescence techniques. The chips are based on thin Si3N4 membranes with a tailored pattern of SU-8 photoresist pillars. Indeed, aqueous solution droplets can be evaporated and concentrated at predefined positions using a non-periodic pillar pattern. We demonstrated quantitatively the deposition and aggregation of gold glyconanoparticles from the evaporation of a nanomolar droplet in a small spot by raster X-ray nanofluorescence. Further, raster nanocrystallography of biological objects such as rod-like tobacco mosaic virus nanoparticles reveals crystalline macro-domain formation composed of highly oriented nanorods.

Graphical abstract: A superhydrophobic chip based on SU-8 photoresist pillars suspended on a silicon nitride membrane

Supplementary files

Article information

Article type
Technical Innovation
Submitted
26 Jun 2014
Accepted
28 Jul 2014
First published
28 Jul 2014
This article is Open Access
Creative Commons BY-NC license

Lab Chip, 2014,14, 3705-3709

Author version available

A superhydrophobic chip based on SU-8 photoresist pillars suspended on a silicon nitride membrane

G. Marinaro, A. Accardo, F. De Angelis, T. Dane, B. Weinhausen, M. Burghammer and C. Riekel, Lab Chip, 2014, 14, 3705 DOI: 10.1039/C4LC00750F

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