Shock processing of amorphous carbon nanodust

Decomposition of HCN during Experimental Impacts in Dry and Wet Planetary Atmospheres

“…Instead, impact events have so far been experimentally simulated using a range of techniques that generate some of the typical impact characteristics, such as high pressures (tens of GPa), high temperatures (thousands of K), plasma formation, and high-velocity (tens of km s –1 ) bodies interaction. The experimental simulations include techniques such as hyper-velocity gun experiments, experiments with high-pressure press, shock-tubes experiments, , air-plasma flows − and, as in this paper, laser-induced dielectric breakdown (LIDB).…”

Acoustic Shock Wave-Induced Solid-State Fusion of Nanoparticles: A Case Study of the Conversion of One-Dimensional Rod Shape into Three-Dimensional Honeycomb Nanostructures of CdO for High-Performance Energy Storage Materials

“…9−12 However, the knowledge of how acoustic shock waves interact with nanomaterials is still at its formative level, and only a few articles have been published thus far. 21,22 Acoustic shock waves may have more influence on promoting nanostructures than laser shock waves and static high-pressure techniques despite the fact that there are many postprocessing technologies available for this purpose. The experimental outcomes of tabletop pressure-driven shock tubes have recently made it possible to analyze the characteristics of materials at pressures of several bars and temperatures of a few thousand Kelvin.…”

“…The experimental outcomes of tabletop pressure-driven shock tubes have recently made it possible to analyze the characteristics of materials at pressures of several bars and temperatures of a few thousand Kelvin. 21,22 The dynamic recrystallization induced by shock waves leads to changes in morphology, magnetic phase shifts, material deformation, and electronic structure, crystallographic and molecular structural properties. 23−29 Only a few studies on technologically significant nanoparticles have been published thus far, but they have produced some intriguing findings such as crystallographic phase transitions (TiO 2 , ZrO 2 ), 23,24 molecular phase transitions (α-Fe 2 O 3 , Co 3 O 4 ), 25,26 magnetic phase transitions (CoFe 2 O 4 , ZnFe 2 O 4 ), 27,28 crystalline to amorphous (SiO 2 ), 29 amorphous to crystalline (multiwall carbon nanotubes) 30 whereas, in some other cases, stable crystal structures and morphologies have been observed.…”

“…The processing of the nanoparticles by static high pressure and laser shock waves has an extensive track record in recent decades. − However, the knowledge of how acoustic shock waves interact with nanomaterials is still at its formative level, and only a few articles have been published thus far. , Acoustic shock waves may have more influence on promoting nanostructures than laser shock waves and static high-pressure techniques despite the fact that there are many postprocessing technologies available for this purpose. The experimental outcomes of tabletop pressure-driven shock tubes have recently made it possible to analyze the characteristics of materials at pressures of several bars and temperatures of a few thousand Kelvin. , The dynamic recrystallization induced by shock waves leads to changes in morphology, magnetic phase shifts, material deformation, and electronic structure, crystallographic and molecular structural properties. − Only a few studies on technologically significant nanoparticles have been published thus far, but they have produced some intriguing findings such as crystallographic phase transitions (TiO 2 , ZrO 2 ), , molecular phase transitions (α-Fe 2 O 3 , Co 3 O 4 ), , magnetic phase transitions (CoFe 2 O 4 , ZnFe 2 O 4 ), , crystalline to amorphous (SiO 2 ), amorphous to crystalline (multiwall carbon nanotubes) whereas, in some other cases, stable crystal structures and morphologies have been observed. , In addition to the structural aspects, a few interesting results have been observed in the electrochemical properties. For instance, in the case of MWCNTs, the specific capacitance for the control, 150 and 300 shocks-loaded CNTs are found to be 196, 215, and 294 F g –1 , respectively, at 100 mV s –1 .…”