Publications by authors named "Petre T Frangopol"
Multi-substituted hydroxyapatites (ms-HAPs) are currently gaining more consideration owing to their multifunctional properties and biomimetic structure, owning thus an enhanced biological potential in orthopaedic and dental applications. In this study, nano-hydroxyapatite (HAP) substituted with multiple cations (Sr, Mg and Zn) for Ca and anion ( ) for and OH, specifically HAPc-5%Sr and HAPc-10%Sr (where HAPc is HAP-1.5%Mg-0.
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- Silver nanoparticles (AgNPs) were created by reducing silver ions with glucose in a basic solution and were stabilized using tetraethyl orthosilicate and L-asparagine.
- The AgNPs were characterized for their properties and interactions with local anesthetics (procaine, dibucaine, and tetracaine), showing changes in optical spectra that indicate the formation of assemblies influenced by the anesthetics.
- Techniques such as zeta-potential measurements and electron microscopy were used to analyze the size, shape, and stability of the nanoparticles, highlighting the role of electrostatic, hydrophobic, and hydrogen bonding interactions between AgNPs and anesthetic molecules.
The effect of arginine on gold nanoparticles in colloidal solutions and in thin films.
J Nanosci Nanotechnol
September 2011
Gold nanoparticles were prepared in aqueous colloidal solutions and their interaction with L-arginine solutions at different concentrations was investigated by UV-vis spectroscopy, transmission electron microscopy (TEM) and atomic force microscopy (AFM). The shift towards red of the absorption maximum of gold nanoparticles with increasing L-arginine concentration and in time, and the apparition of a new large band at higher wavelength evidence the formation of assemblies of gold nanoparticles, mediated by the amino acid. TEM images present the progress in the building process of supermolecular structures.
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