Roman Kostecki, CNBP researcher, has given an invited talk at the ‘Annual World Congress of Smart Materials’ in Singapore, 4th March 2016 (WCSM-2016).
Talk title: Smart Microstructured Optical Fibers for Chemical and Biological Recognition.
Optical detection of chemical or biological species relies on the interaction between a target species and light. While conventional optical fibers are exceptionally good at carrying light, they have limitations towards sensing applications due to the small fiber tip interaction area. To overcome this problem, microstructured optical fibers (MOFs) provide extended interaction between the light and chemical or biological species, while maintaining the integrity of the device. Thin struts from the surrounding structure suspend the MOF core, the surface of which can be used as a scaffold to add functionality and provide specificity. Guided light that extends outside the core of a MOF provides opportunities for measurements of the composition and concentration of an analyte along the fiber length.
We will review the use of suspended- and exposed- core MOFs for optical sensing, with focus on the different modalities for their deployment in sensing applications using label-based fluorescence and label-free detection techniques. For label-based fluorescence sensing, we discuss the different chemical and physical mechanisms used for surface attachment of suitable marker and photo-switchable molecules, the fiber geometries, and the varied target species that can be detected. For label-free sensing we explore whispering gallery modes, surface plasmon resonance, Bragg grating-based sensing, and Raman spectroscopy using MOFs, highlighting the toolset of sensing mechanisms for MOF-based chemical and biological sensing.
Full details regarding the conference can be found online.