Now showing items 11-20 of 1501
Towards label-free mid-infrared protein assays : in-situ formation of bare gold nanoparticles for surface enhanced infrared absorption spectroscopy of bovine serum albumin
(Universität Ulm, 2017)
Surface enhanced infrared absorption spectroscopy (SEIRAS) with attenuated total reflection (ATR) configuration has been used to determine bovine serum albumin (BSA) protein adsorbed onto bare gold nanoparticles (AuNPs). ...
Portable infrared laser spectroscopy for on-site mycotoxin analysis
(Universität Ulm, 2017-03-09)
Mycotoxins are toxic secondary metabolites of fungi that spoil food, and severely impact human health (e.g., causing cancer). Therefore, the rapid determination of mycotoxin contamination includingdeoxynivalenolandaflato ...
A mid-Infrared spectroscopy platform based on GaAs/AlGaAs thin-film waveguides and quantum cascade lasers
(Universität Ulm, 2016)
The performance and versatility of GaAs/AlGaAs thin-film waveguide technology in combination with quantum cascade lasers for mid-infrared spectroscopy in comparison to conventional FTIR spectroscopy is presented. Infrared ...
Mid-infrared fiberoptic evanescent field spectroscopy for in-situ monitoring of tetrahydrofuran hydrate formation and dissociation
(Universität Ulm, 2017-01-03)
Tetrahydrofuran is a relevant auxiliary molecule when storing carbon dioxide or hydrocarbons as gas hydrates. The present study demonstrates the application of in situ mid-infrared fiber-optic evanescent field absorption ...
Simultaneous quantification of ion pairs in water via infrared attenuated total reflection spectroscopy
(Universität Ulm, 2016-02-10)
In this study, ion pairs in aqueous solution were quantitatively and simultaneously determined via infrared attenuated total reflection (IR-ATR) spectroscopy. Seven salts that are occurring in natural seawater, i.e., NaCl, ...
Dielectric properties of graphene/MoS2 heterostructures from ab initio calculations and electron energy-loss experiments
(Universität Ulm, 2018-06-07)
High-energy electronic excitations of graphene and MoS2 heterostructures are investigated by momentum-resolved electron energy-loss spectroscopy in the range of 1 to 35 eV. The interplay of excitations on different sheets ...
Boron-doped diamond modified with gold nanoparticles for the characterization of bovine serum albumin protein
(Universität Ulm, 2017-07)
Boron-doped diamond (BDD) has been modified with bare gold nanoparticles (AuNPs) for the investigation of bovine serum albumin (BSA) protein films. First, the BDD electrode was amino- terminated via silanization with ...
Chem/bio sensing with non-classical light and integrated photonics
(Universität Ulm, 2017-12-06)
Modern quantum technology currently experiences extensive advances in applicability in communications, cryptography, computing, metrology and lithography. Harnessing this technology platform for chem/bio sensing scenarios ...
Mid-infrared sensor for hydrocarbon monitoring : the Influence of salinity, matrix and aging on hydrocarbon- polymer partitioning
(Universität Ulm, 2018-02-14)
Mid-infrared sensors (MIR) based on attenuated total reflection (ATR) spectroscopy provide a robust and sensitive platform for the detection of low levels of organic molecules dissolved in water. The chemical and ...
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; ...