Gyöngyi Gombár

Gyöngyi Gombár
University of Szeged · Department of Physical Chemistry and Materials Science

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9
Publications
508
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37
Citations

Publications

Publications (9)
Article
Full-text available
Sub-nanometer-sized gold nanoclusters (Au NCs) were prepared via the spontaneous reduction of [AuCl4]−- ions with a hydroxamate derivative of L-tryptophan (Trp) natural amino acid (TrpHA). The prepared TrpHA-Au NCs possess intense blue emission (λem = 470 nm; λex = 380 nm) with a 2.13% absolute quantum yield and 1.47 ns average lifetime. The Trp-st...
Article
Full-text available
Fluorescent gold nanoclusters have been successfully used as fluorescent markers for imaging of cells and tissues, and their potential role in drug delivery monitoring is coming to the fore. In addition, the development of biosensors using structure-tunable fluorescent nanoclusters is also a prominent research field. In the case of these sensor app...
Article
Full-text available
Role of amino acids like L‐phenylalanine (Phe), L‐glutamine (Gln) and L‐arginine (Arg) is described and interpreted in terms of their potential for preparation of fluorescent molecular‐like gold and silver nanostructures. We are among the first to demonstrate the effect of syntheses conditions as well as the molecular characteristics of Phe, Gln an...
Article
Full-text available
In the current work, we first present a simple synthesis method for the preparation of novel Vitamin-B1-stabilized few-atomic gold nanoclusters with few atomic layers. The formed nanostructure contains ca. eight Au atoms and shows intensive blue emissions at 450 nm. The absolute quantum yield is 3%. The average lifetime is in the nanosecond range a...
Article
Here we report a facile sulfation of TiO2 semiconductor photocatalyst by simply grinding and calcination method using elemental sulfur from desulfurisation of petroleum. The successful sulfation of the prepared visible light active was proved by FT‐IR and XPS measurements, as well. The photocatalytic tests revealed that the S‐TiO2‐2 is the most eff...
Article
Full-text available
In this paper, we firstly demonstrate a simple and reproducible synthesis protocol to produce nicotinamide-stabilized gold nanoclusters (NAM-Au NCs) under mild conditions. The dominant role of the pH and the ligand to metal ion molar ratio on the formation of these few atomic fluorescent NCs were proven. The prepared NCs show intensive blue-emissio...
Poster
Introduction: The present work describes a calorimetry-founded characterization and design of a potential surfactant based colloidal drug delivery system. However, numerous research groups have published their outcomes according to the thermodynamic characterization of mixed micelle formation but only a few articles provide deeper information on th...
Article
We first demonstrate a simple and rapid fabrication protocol of bovine serum albumin (BSA) nanoparticles (NPs), as potential drug carriers using a microchannel flow technique with the successful encapsulation of a water-soluble kynurenic acid (KYNA) having neuroactive property has also been performed. By comparison, the preparation of a hydrophobic...

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