Evaluation of bioinspired functional surfaces for nanoparticle filtering
- 208 Downloads
We present the development of a novel integrated device for airborne nanoparticle filtering with bioinspired nanoscale functionality. The underlying idea is to investigate the principle of adherent surfaces, e.g. pollen, as a biological model and transfer this functionality into a technology using functionalized microstructured surfaces. This might offer an efficient filtering method for nanoscale airborne particles without the limitations in gas permeability of conventional filters. We investigated the different pollen species for their structural and biochemical surface properties to achieve bioinspired surface functionality on silicon surfaces. The resulting conical structures have sizes from 4 to 20 μm. Depending on structure sizes, the adhesive properties of the surfaces towards aerosol particles could be directly influenced. The surfaces were tested in a demonstrator setup and the collection efficiency visually determined.
KeywordsPollen Surface Collection Efficiency Filter Element Pollen Species Functional Coating
We gratefully acknowledge financial support from the German Research Foundation under grant number WO 1698/1-1. We thank Marie-Luise Bauersfeld and Carolin Peter, Fraunhofer IPM, for their assistance with photolithography and dry etching.
- Heeb NV et al (2005) Secondary emissions risk assessment of diesel particulate traps for heavy duty applications. SAE Technical Paper Series 26:014Google Scholar
- Luu D-T, Marty-Mazars D, Trick M, Dumas C, Heizmanna P (1999) Pollen–stigma adhesion in brassica spp involves SLG and SLR1 glycoproteins. Plant Cell 11:251–262Google Scholar
- Wasisto HS, Merzsch S, Waag A, Uhde E, Salthammer T, Peiner E (2012) Airborne engineered nanoparticle mass sensor based on a silicon resonant cantilever. Sens Actuators B Chem (in press). doi: 10.1016/j.snb.2012.04.003
- Zinkl GM, Zwiebel BI, Grier DG, Preuss D (1999) Pollen-stigma adhesion in Arabidopsis: a species-specific interaction mediated by lipophilic molecules in the pollen exine. Development 126:5431–5440Google Scholar