2022
One-step synthesis of gold nanoparticles for catalysis and SERS applications using selectively dicarboxylated cellulose and hyaluronate
VAVROVA, Alzbeta, Tereza CAPKOVA, Ivo KURITKA, Jan VICHA, Lukas MUNSTER et. al.Základní údaje
Originální název
One-step synthesis of gold nanoparticles for catalysis and SERS applications using selectively dicarboxylated cellulose and hyaluronate
Autoři
VAVROVA, Alzbeta, Tereza CAPKOVA, Ivo KURITKA, Jan VICHA a Lukas MUNSTER
Vydání
International journal of biological macromolecules, AMSTERDAM, Elsevier Science BV, Netherlands, 2022, 0141-8130
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10608 Biochemistry and molecular biology
Stát vydavatele
Nizozemské království
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 8.200
Kód RIV
RIV/00216224:14740/22:00128762
Organizační jednotka
Středoevropský technologický institut
UT WoS
000795917600007
Klíčová slova anglicky
Dicarboxypolysaccharides; Dicarboxylated cellulose; Dicarboxylated hyaluronate; Gold nanoparticles; Surface-enhanced Raman scattering; Catalysis
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 28. 2. 2023 14:57, Mgr. Pavla Foltynová, Ph.D.
Anotace
V originále
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.
Návaznosti
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