3D fractalization over natural colloidal microinclusions

Kuzmenko, A. P.; Aung, Chan Nyein; Rodionov, V. V.

doi:10.1134/s1063784215060146

Cited by 5 publications

(8 citation statements)

References 7 publications

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“…The particle dynamics was studied by video recording (frame rate 30 Hz, resolution 704 × 576 px). The particles moved in the colloidal solution from the negative electrode to the positive one by analogy with earlier data [11][12][13][14].…”

Section: Methodssupporting

confidence: 62%

“…The reconstruction of the chemical structure in the FS, DS and PLS described herein was traced from changes in the Raman spectrum for colloidal solution residue using Raman microscope spectroscopy with a spatial resolution of 500 nm. The formation of a specific structure under equilibrium conditions between carbon atoms with sp 2 -hybridization is accompanied by growth of either π-bound elongated carbon clusters (sized up to several decades of microns) or σ-bound graphite structures as demonstrated in earlier works [11][12][13]. The formation of the bands D = 1336÷1353 cm -1 (A-type symmetry "defect mode") and G = 1567÷1600 cm -1 (tangential oscillations) in the Raman spectra confirmed their MWCNT -COOH affiliation (Fig.…”

Section: Resultsmentioning

confidence: 54%

“…The colloidal solution was applied using the drop method into an electrode gap (100, 500, 1000 and 1500 µm) of a circuit board produced by photolithography on a sitall substrate capped with magnetron-sputtered copper, chromium or gold films ( Fig. 2a) [10][11][12]. The electrodes were DC biased (15 to 25 V).…”

Section: Methodsmentioning

confidence: 99%

“…The problems of uncontrolled aggregation [9] are cleared off by introducing SWCNT and MWCNT into polymer or metallic matrices [9] or CNT functionalization with carboxyl groups -СООН [10]. This method allows achieving self-assembly and self-organization by increasing the stability of CNT colloidal solutions [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Formation of hierarchical structures from functionalized multi-walled carbon nanotubes in aerosil containing solutions

Kuzmenko¹,

Naing²,

Kuz’ko³

et al. 2020

MoEM

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Specific features and regularities of self-assembly and self-organization of multi-walled carbon nanotubes (MWCNT) have been studied for diffusion-limited conditions (method of drops) in water-based (deionized water) colloidalal solutions with aerosil exposed to DC electric fields with magnitudes of 15 to 25 V. Studies of hierarchical structure formation during drop evaporation in uniform electric fields have revealed the formation of 40–120 nm sized linear piecewise formations, 25–45 nm sized fractal structures and 250 nm sized diffuse structures from MWCNT – COOH + aerosil + H2Odw. The structures have been studied using confocal microscopy, X-ray diffraction, Raman scattering, atomic force microscopy, IR spectroscopy and scanning electron microscopy. The sizes of the observed micro- and nanostructures decrease following the hyperbolic law d = 1/U in the approximation d → 2R, their growth rate increasing as U2. We show that intense ultrasonication of functionalized MWCNT – COOH + aerosil + H2Odw in colloidal solutions causes the formation of the so-called “breathing" modes in axis centered single-walled carbon nanotubes. This is confirmed by short-wave Raman scattering excitation and enables the existence of both combined sp2-hybridization types with π- and σ- carbon bonds and the metallic and semiconductor conductivity types in the material thus showing good promise of these structures for nanoelectronics.

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Section: Methodssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 54%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Formation of hierarchical structures from functionalized multi-walled carbon nanotubes in aerosil containing solutions

Kuzmenko¹,

Naing²,

Kuz’ko³

et al. 2020

MoEM

View full text Add to dashboard Cite

show abstract

“…However, the application of SWCNTs and MWCNTs involves difficulties in stabilization and the set orientation. The alternative decision when SWCNTs and MWCNTs are structured can use the phenomena of self-assembly and self-organization [3]. The present work considers the influence of electric fields on self-organization processes of preliminary functionalized with carboxyl groups -MWCNTs -COOH [4,5] with a different concentration in colloidal solutions of sodium dodecyl sulfate (SDS) with the deionized water (DW) and without SDS.…”

Section: Introductionmentioning

confidence: 99%