The impact of larger clusters formation C5, C6, C7, C8, C9, and C10 on the rates of carbon sublimation at elevated temperatures

Wu, C.H.; Mszanowski, U.; Martin, Jan M. L.

doi:10.1016/s0022-3115(98)00310-9

Cited by 16 publications

(5 citation statements)

References 6 publications

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“…The energetics for each of these reactions is given in Table : all energetically allowed reactions – proceed with release of heat. Note that the entropy of the C 10 rg isomer in its ground state increases monotonically with temperature and that in the temperature interval from 298 to 4000 K it is on average ≈6.3% higher than the entropy of the linear cumulenic C 10 molecule calculated in ref .…”

Section: Results and Discussionmentioning

confidence: 56%

Quantum-Chemical Calculation of Carbododecahedron Formation in Carbon Plasma

2015

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The ground state of the molecule consisting of 10 carbon atoms in C10(rg) "ring" conformation and the energy of its metastable C10(st) "star" conformation are reported. The reaction coordinate for the isomeric transition C10(st) → C10(rg) was calculated using density functional theory (DFT) with UB3LYP/6-31G(d,p). It was established that a 5-fold symmetry axis is conserved in this isomeric transition. The total energy of the ring isomer is by 10.33 eV (9.16 eV as zero-point energy corrected) lower than that of the star isomer. The energy barrier for the transition from the metastable star state to the ring state is 2.87 eV (3.57 eV as zero-point energy corrected). An analysis of possible chemical reactions in carbon plasma involving C10(st) and C10(rg) and leading to the formation of C20 fullerenes was performed. It was revealed that the presence of the C10(st) conformation in the reaction medium is a necessary condition for C20 fullerene formation. It was shown that the presence of hydrogen atoms in carbon plasma and UV radiation accelerate the C10(st) → C10(rg) transition and thus suppress the C20 fullerene formation.

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Section: Results and Discussionmentioning

confidence: 56%

Quantum-Chemical Calculation of Carbododecahedron Formation in Carbon Plasma

2015

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“…(9) A more detailed discussion and the setting of parameters for sublimation theory were presented in Michelsen's work (9) and those of other previous researchers. (21)(22)(23)(24)(25)(26) The annealing energy production rate was calculated as…”

Section: Laser-induced Incandescencementioning

confidence: 99%

Optical Analytical Technique for Carbonaceous Particles Using Laser-Induced Electro-Avalanche Fluorescence and Laser-Induced Incandescence

Ikezawa

Wakamatsu²,

Ueda

2013

Sensors and Materials

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This report describes an optical sensing system for fine particle detection using a combination of two techniques: laser-induced breakdown spectroscopy (LIBS) and laserinduced incandescence (LII). We have improved laser measurement systems applied for small-particle analysis. We have determined elemental composition and density of particles using LIBS and have been able to measure particle size using LII. Controlling the power density of the light source of the present system allowed switching from LIBS to LII. LII temporal analysis was conducted using a streak camera, which was also used for LIBS analysis. The LII technique allows in situ measurement of the average primary particle size of nanoscale soot particles.

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“…Equilibrium constants K D1 , K D2 , and K D3 are dimensionless and look like (17) if quantities (18) are used.…”

Section: Iodomethane Pyrolysismentioning

confidence: 99%

“…Seven relations (17), (19), and (21) form a closed system of equations in seven sought-for quantities x i (i = 1, ..., 7). The other concentrations (x 8 , x 9 , x 10 , and x 11 ) are several orders of magnitude less than the first seven concentrations and affect the character of the equilibrium insignificantly, and therefore it is admissible to find them by formulas (22) from independently found quantities x i (i = 1, ..., 7).…”

Section: Iodomethane Pyrolysismentioning

confidence: 99%