Preparation, aging and temperature stability of PEGylated gold nanoparticles

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Preparation, aging and temperature stability of PEGylated gold nanoparticles

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Preparation, aging and temperature stability of PEGylated gold nanoparticles

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Colloids and Surfaces A: Physicochemical and Engineering Aspects

ISSN

0927-7757

e-ISSN

—

Svazek periodika

523

Číslo periodika v rámci svazku

JUN 20 2017

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

91-97

Kód UT WoS článku

000404704200011

EID výsledku v databázi Scopus

—