title: Towards the development of solid-state platform optical sensors: aggregation of gold nanoparticles on polyurethane foam.
abstract: 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-1and relative standard deviations of 3-5%. Charged species that affect AuNPs in solution do not influence them on PUF.
authors: Analytical Chemistry Division, Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, Moscow 119991, Russia. Electronic address: apyari@mail.ru.
authors: Vladimir V
authors: VV
authors: Apyari
authors: Analytical Chemistry Division, Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, Moscow 119991, Russia.
authors: Viktoria V
authors: VV
authors: Arkhipova
authors: Analytical Chemistry Division, Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, Moscow 119991, Russia.
authors: Maria V
authors: MV
authors: Gorbunova
authors: Scientific-Research Institute of Chemical Reagents and Special Purity Shemicals, Bogorodsky Val, 3, Moscow, Russia.
authors: Pavel A
authors: PA
authors: Volkov
authors: Analytical Chemistry Division, Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, Moscow 119991, Russia.
authors: Andrey I
authors: AI
authors: Isachenko
authors: Analytical Chemistry Division, Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, Moscow 119991, Russia.
authors: Stanislava G
authors: SG
authors: Dmitrienko
authors: Analytical Chemistry Division, Department of Chemistry, Lomonosov Moscow State University, Leninskie gory, 1/3, Moscow 119991, Russia.
authors: Yury A
authors: YA
authors: Zolotov
keywords: Gold nanoparticles; Nanocomposite; Optical sensor; Sensing organic compounds; Solid-phase aggregation; Surface plasmon resonance