Abstract
Objectives: To synthesize gold (Au) doped fullerene (C60)-Poly (vinyl pyrrolidone)PVP nanofluids in an alcoholic medium. Methods: A simple chemical reduction method was adopted to synthesize Au nanoparticles and then these NPs were doped into the C60-PVP NFs by ultra-sonication. The samples were characterized using spectrophotometer, rheometer and microscope. Findings:We reported Surface Plasmon Resonance enhanced p !p C60(sp2)electron transition in PVP molecules upon insertion of NG into C60 NFs with PVP in butanol. Electron transfer PVP!Au(NG) causes a drastic decrease in the light emission in PVP moieties in a Au:C60-PVP complex. A noticeable red shift of the C=O stretching band of PVP reveals surface interaction between “>C=O and Au-atom. Rheological study of NFs reveals non-Newtonian behavior with an enhanced yield stress and follows a typical Bingham type flow characteristics.High resolution transmission electron micrograph shows formation of Au-C60 metal-non metal NPs of hexagonal shape. Novelty: Decrease in light emission intensity of PVP molecules in presence of Au NPs hints that it could be a candidate for sensing applications. Keywords: Nanogold; nanofluids; surface plasmon resonance; light emission; rheological properties
Highlights
Fullerene (C60) nanofluids (NFs) are engineered colloidal suspensions of C60 nanoparticles (NPs) dispersed in medium such as water, mineral oils, ethylene glycol, polymer solutions, and biofluids
The thin films prepared by[14]reaches a maximum value quantum yield of light emission and results in huge enhancement in the signal of film because of a strong local field induced by surface plasmon resonance (SPR) excitation in the NG
We studied absorption spectra ( Figure 1 A) in the 250-900 nm region in the NFs, which consists of (a) 0, (b) 1, (c) 2, (d) 3, (e) 5, (f) 10.0, (g) 30.0, and (h) 50.0 μM Au along with 10.0 μM C60 in the presence of 40.0 g/L PVP in butanol
Summary
Fullerene (C60) nanofluids (NFs) are engineered colloidal suspensions of C60 nanoparticles (NPs) dispersed in medium such as water, mineral oils, ethylene glycol, polymer solutions, and biofluids. C60-Au NPs synthesiszed by[12] via chemical modification route are capable of enhancing photovoltaic efficiency by providing a large number of donor-acceptor interfaces of large surface area. In[13] synthesized highly stable ogano-soluble thiol-protected Au-nanorods via a functionalization route which exhibits exceptional optical properties different from their corresponding spherical ones. They further reported that thiol compounds acts a stabilizer and provides space for inclusion of insertion of C60 molecules to develop hybrid nanostructures. In this report we discuss on synthesis of Au doped C60-PVP NFs in a non aqueous medium by a simple chemical method and studied their optical, microstructural and reological properties
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