Effect of fullerene content on the thermal, microstructure, and electrokinetic properties of fullerene/poly(vinyl pyrrolidone) nanofluids and nanocomposites

Behera, M.

doi:10.1088/1757-899x/410/1/012009

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…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 C 60 in the presence of 40.0 g/L PVP in butanol. The optical absorption spectrum exhibits surface plasmon resonance (SPR) enhanced dipole allowed transition near 300 nm in C(sp 2 ) electrons when Au attached to C 60 /PVP (3)(4)(5)(6)(7)(8)(9)(10)18) .In the presence of Au, a characteristic Au-SPR band group exhibits over 500−900 nm with an average wavelength maxima λ max = 535 nm. FTIR results show that a non-covalent interaction occurs between Au and ">C=O" (PVP) sites.It can be seen from the spectra in Figure 1B that the Au brings a substantial change and red-shift in the PVP (>C=O) vibrational band.…”

Section: Absorption and Infrared Spectra In Au:c60-pvp Nfsmentioning

confidence: 99%

“…(3) mechano-chemical method; and (4) surface modification method (2)(3)(4)(5)(6)(7)(8)(9)(10) . Since the last seven years, we are actively involved in developing C 60 NFs with and without gold NPs in aqueous and non-aqueous media using method-4 (2)(3)(4)(5)(6)(7)(8)(9)(10) . Owing to possession of excellent properties by C 60 and noble metal NPs like gold (Au), fullerene-gold NP combination is preferred to harvest the unique electron or energy transfer properties useful for photovoltaics, sensing and biomedicals that cannot be obtained either with individual metals or with C 60 in an efficient manner.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of gold (Au): Fullerene (C60)-Poly (vinyl pyrrolidone) nanofluids in an alcoholic medium

Behera¹,

Sasisekharan²

2020

IJST

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Objectives: To synthesize gold (Au) doped fullerene (C 60)-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 C 60-PVP NFs by ultra-sonication. The samples were characterized using spectrophotometer, rheometer and microscope. Findings: We reported Surface Plasmon Resonance enhanced π → π * C 60 (sp 2) electron transition in PVP molecules upon insertion of NG into C 60 NFs with PVP in butanol. Electron transfer PVP → Au(NG) causes a drastic decrease in the light emission in PVP moieties in a Au:C 60-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-C 60 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.

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Section: Absorption and Infrared Spectra In Au:c60-pvp Nfsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of gold (Au): Fullerene (C60)-Poly (vinyl pyrrolidone) nanofluids in an alcoholic medium

Behera¹,

Sasisekharan²

2020

IJST

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Poplar as Biofiber Reinforcement in Composites for Large-Scale 3D Printing

Zhao

Tekinalp

Meng

et al. 2019

ACS Appl. Bio Mater.

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The economic viability of the biofuel industry could be improved by adding a high-value revenue stream for biomass supply chains: bioderived composites for the rapidly expanding large-scale additive manufacturing industry (i.e., 3D printing). Using fibrillated fibers derived from biomass (e.g., Populus) to reinforce polymers for 3D printing applications would be less expensive compared to using conventional carbon fibers. Poplar fibers of different mesh sizes (<180, 180−425, 425−850, and 850−2360 μm) were used to prepare poplar−polylactic acid (PLA) composites. The poplar/PLA composites were successfully printed using a large-scale 3D printer to create a podium support. The tensile strength of the composites increased from 34 to 54 MPa as the poplar fiber size decreased. The fracture surfaces of composites derived from smaller poplar fibers (<180 μm) were more compact with fewer voids compared with the composites made with larger poplar fibers. Because of the porous and hollow microstructures, smaller poplar fibers contained more pores on their outer surfaces, which were available for the access and penetration of PLA. Poplar has potential for use as a thermoplastic reinforcement for large-scale 3D printing.

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Effect of fullerene content on the thermal, microstructure, and electrokinetic properties of fullerene/poly(vinyl pyrrolidone) nanofluids and nanocomposites

Cited by 2 publications

References 23 publications

Synthesis and characterization of gold (Au): Fullerene (C60)-Poly (vinyl pyrrolidone) nanofluids in an alcoholic medium

Synthesis and characterization of gold (Au): Fullerene (C60)-Poly (vinyl pyrrolidone) nanofluids in an alcoholic medium

Poplar as Biofiber Reinforcement in Composites for Large-Scale 3D Printing

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