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Knoben, W. (author), Crego-Calama, M. (author), Brongersma, S.H. (author)The nitric oxide (NO) binding properties of monolayers of four different protoporphyrins IX adsorbed on aluminum oxide surfaces have been investigated. XPS and AFM results are consistent with the presence of a monolayer of porphyrins, bound to the surface by their carboxylic acid groups and with the porphine ring oriented more or less...article 2012
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- Knoben, W. (author) article 2011
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Berrier, A. (author), Offermans, P. (author), Cools, R. (author), van Megen, B. (author), Knoben, W. (author), Vecchi, G. (author), Rivas, J.G. (author), Crego-Calama, M. (author), Brongersma, S.H. (author)The development of sensing schemes for the detection of health-threatening gases is an attractive subject for research towards novel integrated autonomous sensor systems. We report here on a novel way of sensing NO\2 by surface plasmon resonance (SPR) using a gas-sensitive layer composed of 5,10,15,20-Tetrakis(4-hydroxyphenyl)-21H,23H-porphine ...article 2011
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Knoben, W. (author), Brongersma, S.H. (author), Crego-Calama, M. (author)The refractive index sensitivity of localized surface plasmon resonance sensors can be improved by placing the plasmonic metal particles on pillars instead of on a planar substrate. In this paper, a simple and versatile colloidal lithography method for the fabrication of plasmonic Au islands on top of polymer nanopillars is described. The pillar...article 2011