Preparation, aging and temperature stability of PEGylated gold nanoparticles

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913713" target="_blank" >RIV/60461373:22310/17:43913713 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0927775717303278?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0927775717303278?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.colsurfa.2017.04.005" target="_blank" >10.1016/j.colsurfa.2017.04.005</a>

Result language

angličtina

Original language name

Preparation, aging and temperature stability of PEGylated gold nanoparticles

Original language description

This work is aimed on preparation and characterization of gold nanoparticles (AuNPs) by direct deposition into polyethylene glycol (PEG) and thiolated polyethylene glycols (PEG-SH; PEG-S2H2). Furthermore, this work investigates temperature stability and aging of the prepared PEGylated AuNPs. The prepared colloidal nanoparticles were characterized by several analytical techniques. Transmission electron microscopy and UV-Vis spectroscopy revealed the shape of AuNPs is spherical in all PEG solutions. The size of the prepared AuNPs was between 2.1 and 5.9 nm, depending on the capturing medium. The particle size was confirmed by dynamic light scattering measurement, which provided additional information on monodispersity of the samples. Atomic absorption spectroscopy showed the concentration of AuNPs increases linearly with deposition time which also corresponds with the optical absorption and color of the prepared PEGylated AuNPs. For AuNPs smaller than 3 nm the absence of surface plasmon resonance peak was observed, which is caused by both the small size of the nanoparticles and/or attachment of thiolated PEG to the surface of the AuNPs. AuNPs stabilized by PEG-SH were more stable and resistant to increased temperature than AuNPs stabilized by PEG-S2H2. These AuNPs subjected more easily to aggregation which resulted in decrease of absorption in the UV-Vis spectra. The highest stability was observed for the Au core of 2.9 nm in size protected by PEG-SH. The prepared materials can find applications in medicine and catalysis.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Colloids and Surfaces A: Physicochemical and Engineering Aspects

ISSN

0927-7757

e-ISSN

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Volume of the periodical

523

Issue of the periodical within the volume

JUN 20 2017

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

91-97

UT code for WoS article

000404704200011

EID of the result in the Scopus database

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