11. Through-plane and in-plane thermal diffusivity determination of graphene nanoplatelets by photothermal beam deflection spectrometryHumberto Cabrera, Dorota Korte, Hanna Budasheva, Behnaz Abbasgholi N. Asbaghi, Stefano Bellucci, 2021, izvirni znanstveni članek Opis: In this work, in-plane and through-plane thermal diffusivities and conductivities of a freestanding
sheet of graphene nanoplatelets are determined using photothermal beam deflection spectrometry.
Two experimental methods were employed in order to observe the effect of load pressures
on the thermal diffusivity and conductivity of the materials. The in-plane thermal diffusivity was
determined by the use of a slope method supported by a new theoretical model, whereas the
through-plane thermal diffusivity was determined by a frequency scan method in which the obtained
data were processed with a specifically developed least-squares data processing algorithm.
On the basis of the determined values, the in-plane and through-plane thermal conductivities and
their dependences on the values of thermal diffusivity were found. The results show a significant
difference in the character of thermal parameter dependence between the two methods. In the case
of the in-plane configuration of the experimental setup, the thermal conductivity decreases with the
increase in thermal diffusivity, whereas with the through-plane variant, the thermal conductivity
increases with an increase in thermal diffusivity for the whole range of the loading pressure used.
This behavior is due to the dependence of heat propagation on changes introduced in the graphene
nano-platelets structure by compression. Ključne besede: graphene nanoplatelets, thermal diffusivity, thermal conductivity, photothermal spectrometry Objavljeno v RUNG: 30.11.2021; Ogledov: 1879; Prenosov: 66 Povezava na celotno besedilo Gradivo ima več datotek! Več... |
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16. Designing new renewable nano-structured electrode and membrane materials for direct alkaline ethanol fuel cell : Conductivity mechanism information on cross-linked self-standing graphene-polysaccharide derivate membranes and their laminated composites with commercial synthetic membranesEgon Pavlica, Ahmed Kreta, Gvido Bratina, končno poročilo o rezultatih raziskav Ključne besede: graphene, chitosan, polysaccharide, fuel cell, alkaline, ethanol, photoconductivity, ionic conductivity, mixed-conductor model Objavljeno v RUNG: 03.12.2020; Ogledov: 2625; Prenosov: 0 Gradivo ima več datotek! Več... |
17. Designing new renewable nano-structured electrode and membrane materials for direct alkaline ethanol fuel cell : Provided graphene derivates and their cross-linked nanostructured membranes detailed structure informationEgon Pavlica, Ahmed Kreta, Gvido Bratina, končno poročilo o rezultatih raziskav Ključne besede: graphene, membrane, chitosan, polysaccharide, fuel cell, alkaline, ethanol, morphology, elemental analysis Objavljeno v RUNG: 03.12.2020; Ogledov: 2794; Prenosov: 0 Gradivo ima več datotek! Več... |
18. Designing new renewable nano-structured electrode and membrane materials for direct alkaline ethanol fuel cell : Information on catalytic activity, structure and electric current con- ductivity of new catalysts on supporting substratesEgon Pavlica, Gvido Bratina, Jørgen Svendby, Qingjun Chen, Jia Yang, De Chen, Ji-Song Huang, Jessie Lue Shingjiang, 2020, končno poročilo o rezultatih raziskav Ključne besede: fuel cell, ethanol oxidation, graphene, oxygen reduction, catalyst, pt-free, electrochemical impedance spectroscopy Objavljeno v RUNG: 03.12.2020; Ogledov: 2875; Prenosov: 0 Gradivo ima več datotek! Več... |
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20. Learning from Nature: Charge Transfer and Carbon Dioxide Activation at Single, Biomimetic Fe Sites in Tetrapyrroles on GrapheneManuel Corva, Fatema Mohamed, Erika Tomsič, Matteo Rinaldi, Cinzia Cepek, Nicola Seriani, Maria Peressi, Erik Vesselli, 2019, izvirni znanstveni članek Ključne besede: carbon dioxide, phthalocyanines, graphene, oxygen, Dirac cones Objavljeno v RUNG: 03.12.2019; Ogledov: 3281; Prenosov: 0 Gradivo ima več datotek! Več... |