liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Photonic studies on polymer-coated sapphire-spheres: A model system for biological ligands
Hasselt University, Belgium.
Hasselt University, Belgium.
Ghent University of INTEC, Belgium.
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, The Institute of Technology.
Show others and affiliations
2015 (English)In: Sensors and Actuators A-Physical, ISSN 0924-4247, Vol. 222, 212-219 p.Article in journal (Refereed) Published
Abstract [en]

In this study we show an optical biosensor concept, based on elastic light scattering from sapphire micro-spheres. Transmitted and elastic scattering intensity of the microspheres (radius 500 mu m, refractive index 1.77) on an optical fiber half coupler is analyzed at 1510 nm. The 0.43 nm angular mode spacing of the resonances is comparable to the angular mode spacing value estimated using the optical size of the microsphere. The spectral linewidths of the resonances are in the order of 0.01 am, which corresponds to quality factors of approximately 10(5). A polydopamine layer is used as a functionalizing agent on sapphire microspherical resonators in view of biosensor implementation. The varying layer thickness on the microsphere is determined as a function of the resonance wavelength shift. It is shown that polymer functionalization has a minor effect on the quality factor. This is a promising step toward the development of an optical biosensor. (C) 2014 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
Elsevier , 2015. Vol. 222, 212-219 p.
Keyword [en]
Label-free biosensor; Microcavity; Photonics; Polydopamine; Sapphire microsphere; Whispering gallery modes
National Category
Physical Sciences
URN: urn:nbn:se:liu:diva-115825DOI: 10.1016/j.sna.2014.11.024ISI: 000349573400025OAI: diva2:796805

Funding Agencies|Life-Science Initiative Limburg; Research Foundation Flanders FWO [G.0829.09, G.0997.11N]

Available from: 2015-03-20 Created: 2015-03-20 Last updated: 2015-03-20

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Liu, XianjieFahlman, Mats
By organisation
Surface Physics and ChemistryThe Institute of Technology
In the same journal
Sensors and Actuators A-Physical
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 77 hits
ReferencesLink to record
Permanent link

Direct link