A5070076438- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Photocatalysis Techniques
- Spectroscopy Techniques in Biomedical and Chemical Research
- TiO2 Photocatalysis and Solar Cells
- Electrochemical Analysis and Applications
- Advanced Nanomaterials in Catalysis
- Protein Interaction Studies and Fluorescence Analysis
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Catalytic Processes in Materials Science
- Spectroscopy and Chemometric Analyses
- Analytical Chemistry and Sensors
- Graphene and Nanomaterials Applications
- Quantum Dots Synthesis And Properties
- Flame retardant materials and properties
- Pigment Synthesis and Properties
- Spectroscopy and Quantum Chemical Studies
- Advanced biosensing and bioanalysis techniques
- Graphene research and applications
- Electrochemical sensors and biosensors
- Electrospun Nanofibers in Biomedical Applications
- Glass properties and applications
- Plasmonic and Surface Plasmon Research
- Nonlinear Optical Materials Studies
- Microbial Metabolites in Food Biotechnology
Babeș-Bolyai University
2015-2024
Applied Natural Sciences
2020-2023
University of Szeged
2020
Academia de Politie Alexandru Ioan Cuza
2020
Friedrich Schiller University Jena
2004-2006
Helmholtz Institute Jena
2006
University of Würzburg
2005
Surface-enhanced Raman scattering (SERS) is a powerful and sensitive technique for the detection of fingerprint signals molecules investigation series surface chemical reactions. Many studies introduced quantitative applications SERS in various fields, several methods have been implemented each specific application, ranging performance characteristics, analytes used, instruments, analytical matrices. In general, very few validated according to international guidelines. As consequence,...
Gold nanoparticle assemblies with different particle densities were immobilized upon functionalized glass substrates and their morphology optical properties are analysed TEM UV?vis absorption spectroscopy. The efficiency of self-assembled gold colloidal nanoparticles as SERS-active at 633?nm excitation line is evaluated by employing p-aminothiophenol. average enhancements in the range 105?107 consistent signals being dominated molecules adsorbed junctions inside assemblies. We employ an...
Gold nanostructured films of various thicknesses (15, 30, and 60 nm) are deposited over regular arrays polystyrene nanospheres in an attempt to evaluate their potential as SERS-active substrates. Atomic force microscopy is used topographically characterize the substrates well ensure thickness gold films. The optical response prepared recommends use SERS experiments with multiple laser lines from visible NIR spectral domains. assessment substrates' activity performed by using 532, 633, 830 nm...
Surface-enhanced Raman spectroscopy (SERS) is a technique that has become widely used for identifying and providing structural information about molecular species in low concentration. There an ongoing interest finding optimum particle size, shape spatial distribution optimizing the SERS substrates pushing sensitivity toward single-molecule detection limit. This work reports design of novel, biocompatible substrate based on small clusters anisotropic silver nanoparticles embedded film...
TiO 2 aerogels prepared by sol‐gel method and followed supercritical drying have been annealed at temperatures ranging between 400 550 °C. The obtained anatase crystallites with the mean size 6.4 13.9 nm, as from transmission electron microscopy measurements, further investigated Raman spectroscopy. It was found that peak position full width half maximum (FWHM) of bands located around 144, 398, 638 cm −1 are influenced crystallite dimension. These spectral changes can be assigned to combined...
The variable configuration of Raman spectroscopic platforms is one the major obstacles in establishing spectroscopy as a valuable physicochemical method within real-world scenarios such clinical diagnostics. For real world applications like diagnostic classification, models should ideally be usable to predict data from different setups. Whether it done by training rugged model with many setups or primary-replica strategy where are developed on 'primary' setup and test generated 'replicate'...
In the present study, polysaccharide-based cryogels demonstrate their potential to mimic a synthetic extracellular matrix. Alginate-based cryogel composites with different gum arabic ratios were synthesized by an external ionic cross-linking protocol, and interaction between anionic polysaccharides was investigated. The structural features provided FT-IR, Raman, MAS NMR spectra analysis indicated that chelation mechanism is main process linking two biopolymers. addition, SEM investigations...
The UV-B component of sunlight damages the DNA in skin cells, which can lead to cancer and premature aging. Therefore, it is necessary use creams that also contain UV-active substances. Many sunscreens titanium dioxide due its capacity absorb wavelengths. In present study, titan was introduced alginate chitosan–alginate hydrogel composites are often involved as scaffold compositions tissue engineering applications. Alginate chitosan were chosen their important role regeneration protection....
Surface-enhanced Raman scattering (SERS) efficiency assessment of truncated tetrahedral Ag nanoparticle arrays with different vertical dimensions prepared by nanosphere lithography provides the experimental evidence electromagnetic (EM) coupling sensitivity to heights. It is demonstrated that EM couplings between localized plasmon resonance each particle and photonic modes particles array are solely accountable for SERS enhancement rhodamine 6G molecules adsorbed on these substrates. Similar...
Developing highly efficient Au/TiO2/WO3 heterostructures with applications in heterogeneous photocatalysis (photocatalytic degradation) and surface-enhanced Raman spectroscopy (dye detection) is currently of paramount significance. were obtained via heat or time-assisted synthesis routes developed by slightly modifying the Turkevich–Frens methods investigated TEM, SEM, XRD, spectroscopy, XPS, photoluminescence, UV–vis DRS techniques. Structural features, such as WO3 crystalline phases, TiO2...