Apyari Vladimir V, Arkhipova Viktoria V, Gorbunova Maria V, Volkov Pavel A, Isachenko Andrey I, Dmitrienko Stanislava G, Zolotov Yury A
Analytical Chemistry Division, Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, Moscow 119991, Russia.
Analytical Chemistry Division, Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, Moscow 119991, Russia.
Talanta. 2016 Dec 1;161:780-788. doi: 10.1016/j.talanta.2016.09.037. Epub 2016 Sep 13.
In this paper, we report on a novel type of nanocomposites based on gold nanoparticles (AuNPs) and polyurethane foam (PUF), which represents an ability of AuNP aggregation on solid polymer matrix with the strongly different selectivity in comparison with aggregation of the same AuNPs in solution. This may indicate that a new type of aggregation takes place, which can be called solid-phase aggregation. A systematic study using diffuse reflectance spectroscopy revealed features of the solid-phase aggregation. The PUF-AuNPs nanocomposites can be synthesized by a simple and low cost procedure based on adsorption of different type AuNPs from aqueous solution onto PUF. Prospects of obtained composite materials for sensing some organic compounds using diffuse reflectance spectroscopy or colorimetry are shown. This nanocomposites have the increased selectivity to thiols allowing for their determination with limits of detection of 0.01-0.05μgmL and relative standard deviations of 3-5%. Charged species that affect AuNPs in solution do not influence them on PUF.
在本文中，我们报道了一种基于金纳米颗粒（AuNPs）和聚氨酯泡沫（PUF）的新型纳米复合材料，它展现出AuNP在固体聚合物基质上聚集的能力，与相同AuNPs在溶液中的聚集相比，具有截然不同的选择性。这可能表明发生了一种新型聚集，可称为固相聚集。使用漫反射光谱进行的系统研究揭示了固相聚集的特征。PUF-AuNPs纳米复合材料可以通过一种简单且低成本的方法合成，该方法基于将不同类型的AuNPs从水溶液吸附到PUF上。展示了所获得的复合材料使用漫反射光谱或比色法传感某些有机化合物的前景。这种纳米复合材料对硫醇具有更高的选择性，其检测限为0.01 - 0.05μg/mL，相对标准偏差为3 - 5%。溶液中影响AuNPs的带电物种对PUF上的AuNPs没有影响。
