engleski

In Situ Gel–based Controlled Synthesis of Chiral Silver Nanoparticles

The observation of chirality on inorganic nanoparticles (NPs) systems is an interesting and highly important phenomenon which has recently attracted considerable attention and has become a hot topic in nanoscience research. The past decade has witnessed an increased interest in the development of gel systems as structural partners for noble metal NPs, giving rise to unique new class of hybrid composite materials with great potential for technological applications. The NPs can be formed prior to the assembly of the hybrid material or by an in situ reduction (via different chemical or physical inputs) within the gel material or during its formation. We have prepared chiral silver nanoparticles through the in situ reduction of hydrogels formed by newly designed anthraquinone-based gelators, comprising tyrosine and anthraquinone moiety connected through linker of different length and flexibility. Chiro-optical properties of the nanocomposites have been investigated by CD and UV-visible spectroscopy and their morphology characterized by transmission electron miscroscopy (TEM) and atomic force microscope (AFM). The formation of the hydrogel process playes an important role in the formation of the chiral nanoparticles. These nanoparticles appear to be stabilised by, and immobilised within, a supramolecular gel-phase network.

Silver nanoparticles ; Supramolecular Gel ; Anthraquinone ; Oxalamide

nije evidentirano