One-step synthesis of gold nanoparticles for catalysis and SERS applications using selectively dicarboxylated cellulose and hyaluronate

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F22%3A63552619" target="_blank" >RIV/70883521:28610/22:63552619 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14740/22:00128762

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0141813022005098?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0141813022005098?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijbiomac.2022.03.043" target="_blank" >10.1016/j.ijbiomac.2022.03.043</a>

Jazyk výsledku

angličtina

Název v původním jazyce

One-step synthesis of gold nanoparticles for catalysis and SERS applications using selectively dicarboxylated cellulose and hyaluronate

Popis výsledku v původním jazyce

Properties and applications of gold nanoparticles (AuNPs) depend on their characteristics which are intrinsically connected to the reducing and capping agents used in their synthesis. Although polysaccharides are commonly used for Au salt reduction, the control over the result is often limited. Here, the selectively dicarboxylated cellulose (DCC) and hyaluronate (DCH) with adjustable composition and molecular weight are used for the first time as reducing and capping agents for AuNPs preparation in an environmental friendly one-step synthesis. Mechanism of reduction and structure-function relationships between the composition of oxidized poly-saccharides and properties of formed AuNPs are elucidated and the variances in the macromolecular architecture of dicarboxypolysaccharides are applied to guide the growth of AuNPs. While the homogenous structure and high density of carboxyl groups of fully-oxidized DCC induced isotropic growth of small and uniform AuNPs with good catalytic performance (d =-20 nm, TOF = 7.3 min(-1), k = 1.47 min(-1)), the lower stabilizing potential and slower reduction rates of the DCH induced the anisotropic growth of larger polyhedral -50 nm nanoparticles, which increased the Surface-Enhanced Raman Scattering efficacy (9x stronger Raman signals on average compared to AuDCC). The use of dicarboxypolysaccharides with adjustable composition and properties thus introduced a new degree of freedom for the preparation of AuNPs with desired properties.

Název v anglickém jazyce

One-step synthesis of gold nanoparticles for catalysis and SERS applications using selectively dicarboxylated cellulose and hyaluronate

Popis výsledku anglicky

Properties and applications of gold nanoparticles (AuNPs) depend on their characteristics which are intrinsically connected to the reducing and capping agents used in their synthesis. Although polysaccharides are commonly used for Au salt reduction, the control over the result is often limited. Here, the selectively dicarboxylated cellulose (DCC) and hyaluronate (DCH) with adjustable composition and molecular weight are used for the first time as reducing and capping agents for AuNPs preparation in an environmental friendly one-step synthesis. Mechanism of reduction and structure-function relationships between the composition of oxidized poly-saccharides and properties of formed AuNPs are elucidated and the variances in the macromolecular architecture of dicarboxypolysaccharides are applied to guide the growth of AuNPs. While the homogenous structure and high density of carboxyl groups of fully-oxidized DCC induced isotropic growth of small and uniform AuNPs with good catalytic performance (d =-20 nm, TOF = 7.3 min(-1), k = 1.47 min(-1)), the lower stabilizing potential and slower reduction rates of the DCH induced the anisotropic growth of larger polyhedral -50 nm nanoparticles, which increased the Surface-Enhanced Raman Scattering efficacy (9x stronger Raman signals on average compared to AuDCC). The use of dicarboxypolysaccharides with adjustable composition and properties thus introduced a new degree of freedom for the preparation of AuNPs with desired properties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

International Journal of Biological Macromolecules

ISSN

0141-8130

e-ISSN

—

Svazek periodika

206

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

927-938

Kód UT WoS článku

000795917600007

EID výsledku v databázi Scopus

2-s2.0-85126864131