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1.
The efflorescent carbon allotropes: Fractality preserved blooming through alkali treatment and exfoliation
Swapna Mohanachandran Nair Sindhu, Sankararaman S, 2020, original scientific article

Abstract: The work reported in the paper elucidates morphological modification induced nanoart and surface area enhancement of graphite, graphene, and soot containing carbon allotropes through ultrasonication and alkali-treatment. The field emission scanning electron microscopic (FESEM) analysis of the samples before and after exfoliation reveals the formation of brilliant flower-like structures from spindle-like basic units due to Ostwald ripening. The x-ray diffraction analysis of the samples gives information about structural composition. The fractal analysis of the FESEM images indicates a multifractal structure with the dimensions—box-counting dimension D0 (1.72), information dimension D1 (1.66), and correlation dimension D2 (1.63)—preserved upon exfoliation. The process of ultra-sonication assisted liquid phase exfoliation resembles blooming as if the carbon allotropes are efflorescent.
Found in: ključnih besedah
Keywords: carbon allotropes, fractal dimension, soot, fractality, alkali treatment, exfoliation
Published: 04.07.2022; Views: 417; Downloads: 0
.pdf Fulltext (8,02 MB)

2.
Tailoring the morphology through alkali treatment
H. V. Saritha Devi, Mohanachandran Nair Sindhu Swapna, Sankaranarayana Iyer Sankararaman, 2020, original scientific article

Found in: ključnih besedah
Summary of found: ...Liquid-phase exfoliation, boron carbide, morphology tuning, sodium hydroxide, refluxion, bleaching...
Keywords: Liquid-phase exfoliation, boron carbide, morphology tuning, sodium hydroxide, refluxion, bleaching
Published: 05.07.2022; Views: 503; Downloads: 0
.pdf Fulltext (2,02 MB)

3.
Time-of-flight photoconductivity investigation of high charge carrier mobility in Ti3C2Tx MXenes thin-film
Egon Pavlica, Gvido Bratina, Andraž Mavrič, Vadym Tkachuk, Nadiia Pastukhova, Manisha Chhikara, Erika Tomsič, Jurij Urbančič, 2023, original scientific article

Abstract: Charge transport through a randomly oriented multilayered network of two-dimensional (2D) Ti3C2Tx (where Tx is the surface termination and corresponds to O, OH and F) was studied using time-of-flight photoconductivity (TOFP) method, which is highly sensitive to the distribution of charge carrier velocities. We prepared samples comprising Ti3C2Tx with thickness of 12 nm or 6-monolayers. MXene flakes of size up to 16 μm were randomly deposited on the surface by spin-coating from water solution. Using TOFP, we have measured electron mobility that reached values up to 279 cm2/Vs and increase with electric-field in a Poole-Frenkel manner. These values are approximately 50 times higher than previously reported field-effect mobility. Interestingly, our zero-electric-field extrapolate approaches electron mobility measured using terahertz absorption method, which represents intra-flake transport. Our data suggest that macroscopic charge transport is governed by two distinct mechanisms. The high mobility values are characteristic for the intra-flake charge transport via the manifold of delocalized states. On the other hand, the observed Poole-Frenkel dependence of charge carrier mobility on the electric field is typical for the disordered materials and suggest the existence of an important contribution of inter-flake hopping to the overall charge transport.
Found in: ključnih besedah
Summary of found: ...multilayered network of flakes, Time-of-flight photoconductivity, MXene exfoliation, High-mobility solution-cast thin-film, Semiconducting mxene...
Keywords: Charge transport in multilayered network of flakes, Time-of-flight photoconductivity, MXene exfoliation, High-mobility solution-cast thin-film, Semiconducting mxene
Published: 31.03.2023; Views: 173; Downloads: 0
.pdf Fulltext (1,97 MB)

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