Fajstavr Dominik, Karasová Adéla, Michalcová Alena, Ulbrich Pavel, Slepičková Kasálková Nikola, Siegel Jakub, Švorčík Václav, Slepička Petr
Department of Solid State Engineering, The University of Chemistry and Technology, 166 28 Prague, Czech Republic.
The Department of Metals and Corrosion Engineering, The University of Chemistry and Technology, 166 28 Prague, Czech Republic.
Nanomaterials (Basel). 2021 May 28;11(6):1434. doi: 10.3390/nano11061434.
The subjects of this work were the enhancement and determination of the stability and other properties of gold nanoparticles (AuNPs) in an aqueous solution, gold nanoparticle immobilization, and further surface grafting on polyethylene naphthalate (PEN). Gold nanoparticles in PEG with a subsequent water solution addition were prepared using cathode sputtering; for the subsequent surface activation, two different solutions were used: (i) sodium citrate dihydrate (TCD) and (ii) N-acetyl-L-cysteine (NALC). The aim of this work was to study the effect of the concentration of these solutions on AuNPs stability, and further, the effect of the concentration of gold nanoparticles and their morphology, and to describe the aging process of solutions, namely, the optical properties of samples over 28 days. Stabilized AuNPs were prepared in an N-acetyl-L-cysteine (NALC) system and subsequently immobilized with NALC. The surface chemistry modification of AuNPs was confirmed using HRTEM/EDS. Gold nanoparticles were successfully immobilized with NALC. Grafting of the modified PEN from a solution of colloidal gold stabilized in the PEG-HO-NALC system led to the polymer surface functionalization.
这项工作的主题是增强并测定金纳米颗粒（AuNPs）在水溶液中的稳定性及其他性质、金纳米颗粒的固定化以及在聚萘二甲酸乙二醇酯（PEN）上的进一步表面接枝。采用阴极溅射法制备了聚乙二醇（PEG）包裹且随后添加水溶液的金纳米颗粒；为进行后续的表面活化，使用了两种不同的溶液：（i）二水合柠檬酸钠（TCD）和（ii）N-乙酰-L-半胱氨酸（NALC）。这项工作的目的是研究这些溶液的浓度对AuNPs稳定性的影响，以及金纳米颗粒浓度及其形态的影响，并描述溶液的老化过程，即28天内样品的光学性质。在N-乙酰-L-半胱氨酸（NALC）体系中制备了稳定化的AuNPs，随后用NALC进行固定。使用高分辨透射电子显微镜/能谱仪（HRTEM/EDS）确认了AuNPs的表面化学修饰。金纳米颗粒成功地用NALC固定。从在PEG-HO-NALC体系中稳定的胶体金溶液接枝改性的PEN导致了聚合物表面功能化。
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