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1.
Tuning the dynamic thermal parameters of nanocarbon ionanofluids : a photopyroelectric study
Mohanachandran Nair Sindhu Swapna, Carmen Tripon, Alexandra Farcas, Dorin Dadarlat, Dorota Korte, Sankaranarayana Iyer Sankararaman, 2024, izvirni znanstveni članek

Opis: The present work delineates the tailoring of the thermal effusivity and diffusivity of the novel class of heat transfer fluids—ionanofluids—by the incorporation of nanocarbons like diesel soot (DS), camphor soot (CS), carbon nanotubes (CN), and graphene (GR). When the thermal diffusivity delivers information on the thermal energy propagation, the thermal effusivity concerns the energy exchange at the interface, enabling energy-efficient thermal system design. The nanocarbons are subjected to morphological characterisation by field emission scanning electron microscopy. Fourier-transform infrared and Raman spectroscopic analyses confirm functional groups and vibrational bands. The microcrystalline size and graphiticity are also understood from the Raman spectrum. Ionanofluids prepared by dispersing nanocarbons into an ionic liquid base 1-Butyl-3-methylimidazolium methyl sulfate (BMMS) are analysed by nondestructive photopyroelectric calorimetry (PPE). The PPE analysis of ionanofluids demonstrates that nanocarbons influence thermal parameters in the base fluid, with soot ionanofluids exhibiting increased thermal effusivity and diffusivity due to their various carbon allotropic composition. This study underscores the importance of selecting the appropriate carbon allotrope for tailoring ionanofluids’ thermal properties, providing insights into manipulating these properties for enhanced performance across various industrial applications.
Ključne besede: photopyroelectric, ionanofluid, soot, graphene, thermal diffusivity
Objavljeno v RUNG: 06.05.2024; Ogledov: 484; Prenosov: 3
.pdf Celotno besedilo (1,03 MB)
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Graphene oxide/12 tungstophosphoric acid nanocomposites - achieving favorable properties with ion beams for electrochemical supercapacitors
Željko Mravik, Milica Pejčić, J. Rmuš Mravik, Blaž Belec, 2023, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: supercapacitor, graphene oxide
Objavljeno v RUNG: 14.11.2023; Ogledov: 987; Prenosov: 0
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Ion-beam irradiated graphene oxide, 12-tungstophosphoric acid and their nanocomposites for electrochemical supercapacitors
Željko Mravik, Milica Pejčić, J. Rmuš Mravik, Blaž Belec, 2023, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: supercapacitor, graphene oxide
Objavljeno v RUNG: 14.11.2023; Ogledov: 1349; Prenosov: 0
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Role of graphene topography in the initial stages of pentacene layer growth
Manisha Chhikara, Gvido Bratina, Egon Pavlica, 2023, izvirni znanstveni članek

Ključne besede: graphene, topography, pentacene layer growth
Objavljeno v RUNG: 25.08.2023; Ogledov: 1006; Prenosov: 4
.pdf Celotno besedilo (6,75 MB)
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Nanoscopic roughness characterization of chitosan with buried graphene oxide for fuel cell application
Ahmed Kreta, Egon Pavlica, Mojca Božič, Gvido Bratina, 2023, objavljeni znanstveni prispevek na konferenci

Ključne besede: AFM, chitosan, graphene oxide, fuel cells, membrane, roughness
Objavljeno v RUNG: 01.03.2023; Ogledov: 1700; Prenosov: 3
.pdf Celotno besedilo (2,74 MB)
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Investigation of graphene oxide in diesel soot
Mohanachandran Nair Sindhu Swapna, Sankararaman S, 2017, izvirni znanstveni članek

Opis: Graphene has emerged as a potential material in various scientific disciplines, ranging from material science, engineering, and more recently biomedicine. The paper describes the investigation of the presence of graphene and graphene oxide (GO) in the carbon soot of internal combustion diesel engines. The UV-Visible, Fourier transform infrared (FTIR), X- ray diffraction (XRD), Photoluminescent (PL) and Raman spectroscopic analysis of the sample provided a conclusive evidence of the formation of graphene and GO. The Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersive Spectrum (EDX) of the sample show carbon nanoparticles (CNPs) of size less than 50nm. The High -Resolution Transmission Electron Microscopy (HR-TEM) analysis confirmed the formation of graphene sheets with carbon nanospheres attached to it. The study reveals the possible exploitation of the diesel soot for potential applications in science and technology
Ključne besede: Graphene, Graphene oxide, Carbon nanoparticles, Combustion, Carbon nanotube
Objavljeno v RUNG: 30.06.2022; Ogledov: 1509; Prenosov: 0
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