Now showing items 111-116 of 116
Surface enhanced infrared absorption spectroscopy based on gold nanostars and spherical nanoparticles
(Universität Ulm, 2017-10-16)
Plasmonic anisotropic nanoparticles possess a number of hot spots on their surface due to the presence of sharp edges, tips or vertices, leading to a high electric field strength surrounding the nanostructures. In this ...
Mid-infrared thin-film diamond waveguides combined with tunable quantum cascade lasers for analyzing the secondary structure of proteins
(Universität Ulm, 2016-04-28)
Diamond has excellent optical properties including broadband transmissivity, low self- absorption and a high refractive index, which have prompted its use in for optical sensing applications. Thin-film diamond strip ...
Towards enhanced optical sensor performance: SEIRA and SERS with plasmonic nanostars
(Universität Ulm, 2017-02-08)
We report the preparation and characterization of plasmonic chip-based systems comprising self-assembled gold nanostars at silicon substrates that enable concomitantly enhanced Raman (surface enhanced Raman spectroscopy; ...
Online monitoring of carbon dioxide and oxygen in exhaled mouse breath via substrate-integrated hollow waveguide Fourier-transform infrared-luminescence spectroscopy
(Universität Ulm, 2018)
Exhaled breath offers monitoring bio markers, as well as diagnosing diseases and therapeutic interventions. In addition, vital functions may be non-invasively monitored on- line. Animal models are frequently used in research ...
Polycrystalline diamond thin-film waveguides for mid-infrared evanescent field sensors
(Universität Ulm, 2018-06-08)
Photonic design and optimization of thin-film polycrystalline diamond waveguides are shown, serving as advanced evanescent field transducers in the mid-infrared fingerprint regime (2000–909 cm–1; 5–11 μm). Design constraints ...
Advanced photonic sensors based on interband cascade lasers for real-time mouse breath analysis
(Universität Ulm, 2018-08-03)
A multiparameter gas sensor based on distributed feedback interband cascade lasers emitting at 4.35 μm and ultrafast electro-spun luminescence oxygen sensors has been developed for the quantification and continuous monitoring ...