scholarly journals Formation mechanisms of hollow manganese hexacyanoferrate particles and construction of a multiple-shell structure

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8767-8774
Author(s):  
Fumiyuki Shiba ◽  
Asumi Yamamoto ◽  
Yuuki Shinta ◽  
Ushio Mameuda ◽  
Yuuki Tahara ◽  
...  
Keyword(s):  
Shell Structure ◽  
Hollow Structure ◽  
Formation Mechanisms ◽  
Growth Technique ◽  
Hollow Particles ◽  
Preferential Dissolution

The core's preferential dissolution transforms the cubic-core/monoclinic-shell manganese hexacyanoferrate particles into the hollow structure. Applying an additional growth technique, multi-shell hollow particles have also been constructed.

Hollow Amorphous Formation via Oxidation of Al Nanoparticles at Low Temperatures

2007 ◽  
Vol 544-545 ◽  
pp. 347-350
Author(s):  
Ryusuke Nakamura ◽  
Jung Goo Lee ◽  
Daisuke Tokozakura ◽  
Hirotaro Mori ◽  
Hideo Nakajima
Keyword(s):  
Hollow Structure ◽  
Oxidation Mechanism ◽  
Formation Mechanisms ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Hollow Particles ◽  
Al Nanoparticles ◽  
Transmission Electron ◽  
Before And After ◽  
Diffraction Patterns

Formation of hollow structure through oxidation of Al nanoparticles was studied by applying transmission electron microscopy. Al nanoparticles 6~8 nm in diameter were observed to become hollow particles after having been exposed to air at 295 K for a few minutes. An analysis of the Debye-Sherrer rings in the selected area diffraction patterns before and after oxidation showed that hollow oxide nanoparticles are amorphous. The formation mechanisms of hollow oxide are discussed based on the low-temperature oxidation mechanism of Al and on the comparison with our previous results of hollow ZnO formation via oxidation of Zn nanoparticles.

Synthesis and Electrochemical Performance of Porous Carbon/Carbon Electrode with Core/Shell Structure

2010 ◽  
Vol 123-125 ◽  
pp. 1099-1102
Author(s):  
Ki Seok Kim ◽  
Soo Jin Park
Keyword(s):  
Electrochemical Performance ◽  
Porous Carbon ◽  
Shell Structure ◽  
Electrode Materials ◽  
In Situ Polymerization ◽  
High Surface ◽  
Hollow Structure ◽  
Core Shell ◽  
Carbon Electrode ◽  
Core Shell Structure

Recently core/shell nanostructures including nanotubes, nanowires, and nanofibers have a considerable attension because multiple or enhanced functionality can be obtained by the synergistic effect of different materials in the formation of a core/shell structure. In this work, porous carbon/carbon core/shell carbon electrode (P-C/C-CE) composed of core graphene and disordered shells were prepared to obtain a new type of carbon electrode materials. The disordered carbon shells were prepared by coating of polyaniline onto the graphene by in-situ polymerization in the presence of nano-sized silica and subsequent carbonization at 850°C. After carbonization, P-C/C-CE showed the hollow structure and crystallinity. In addition, P-C/C-CE exhibited superior electrochemical performance compared to graphene and graphene/PANI composites, which was attributed to the high surface area of P-C/C-CE and the presence of nitrogen groups formed onto carbon electrode after the carbonization of shell polyaniline.

Synthesis of Submicrometer Hollow Particles with a Nanoscale Double-Layer Shell Structure

Langmuir ◽  
2012 ◽  
Vol 28 (39) ◽  
pp. 13783-13787 ◽  
Author(s):  
Yingqing Wang ◽  
Bhanukiran Sunkara ◽  
Jingjing Zhan ◽  
Jibao He ◽  
Ludi Miao ◽  
...  
Keyword(s):  
Double Layer ◽  
Shell Structure ◽  
Hollow Particles

scholarly journals Direct Fabrication of Reduced Graphene Oxide@SnO2 Hollow Nanofibers by Single-Capillary Electrospinning as Fast NO2 Gas Sensor

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Dong Wang ◽  
Mingcong Tang ◽  
Jianbo Sun
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Shell Structure ◽  
Composite Nanofibers ◽  
Hollow Structure ◽  
Core Shell ◽  
Hollow Nanofibers ◽  
Reduced Graphene ◽  
Core Shell Structure

Single-capillary electrospinning has been exhibited to be a simple and scalable method for fabricating nanofibers. Construction of graphene/inorganic fibers with the core-shell hollow structure using graphene as skeleton has been rarely reported. Here, we show a facile approach to prepare electrospun reduced graphene oxide@SnO2 composite nanofibers with the hollow structure. The hollow core@shell structure is formed in a single-capillary electrospinning process including sintering, which is promising for the preparation of graphene/inorganic composite nanofibers. The reduction of as-synthesized graphene is realized by stannous ion. Resulting hollow and core-shell structure enables the reduced graphene oxide@SnO2 composite nanofibers to adsorb and desorb the target gas more easily, which is promising for future applications as fast NO2 gas sensor.

Geometrical implication of ion transporters employing an ellipsoidal hollow structure in pseudo-solid electrolytes

Nanoscale ◽  
2015 ◽  
Vol 7 (6) ◽  
pp. 2729-2734 ◽  
Author(s):  
Youngjin Kim ◽  
Jong Hyuk Park ◽  
Jihoon Jung ◽  
Sang-Soo Lee
Keyword(s):  
Ion Transport ◽  
Solid Electrolytes ◽  
Hollow Structure ◽  
Ion Transporters ◽  
Hollow Particles

We demonstrate facilitated ion transport in oligomer electrolytes by introducing TiO2 hollow particles of ellipsoidal and spherical shapes.

scholarly journals Carbon-Interlayer SnO2–Sb2O3 Composite Core–Shell Structure Anodes for Sodium-Ion Batteries

2021 ◽  
Vol 8 ◽  
Author(s):  
Guoju Zhang ◽  
Yuanduo Qu ◽  
Fanghui Zhao ◽  
Rongxin Dang ◽  
Jie Yang ◽  
...  
Keyword(s):  
Shell Structure ◽  
Specific Capacity ◽  
Hollow Structure ◽  
Rate Capability ◽  
Sodium Ion ◽  
Core Shell ◽  
Discharge Process ◽  
Sodium Ion Batteries ◽  
Rate Performance ◽  
Core Shell Structure

Although great efforts have been dedicated to improving electrochemical property of oxides anode material for sodium-ion batteries, the cycling life and rate capability of oxides anode materials are still far from its theoretical value. Herein, novel uniform SnO2@C@Sb2O3 submicrospheres with multilayer core–shell hollow structure have been synthesized as anode of sodium-ion batteries. The multilayer core–shell structure SnO2@C@Sb2O3 composite delivers a reversible capacity of 269 mAh g−1 at higher current density (1,500 mA g−1) after 100 cycles and exhibited excellent rate performance. The conductivity of the anode composite is promoted by the uniformly carbon dispersion through the whole submicrospheres. The dramatic volume change of electrode material could be mitigated by the porous core–shell structure of Sb2O3 and SnO2 during charge–discharge process. The enhanced specific capacity and rate performance are mainly ascribed to the integrity of structure and synergy effect between different metal oxides.

The dislocation structure of a 10° [110] tilt boundary in silicon

1983 ◽  
Vol 41 ◽  
pp. 114-115
Author(s):  
B. Cunningham ◽  
D.G. Ast
Keyword(s):  
Dislocation Structure ◽  
Tilt Angle ◽  
Imaging Technique ◽  
Diamond Lattice ◽  
Tilt Boundary ◽  
Formation Mechanisms ◽  
Diffraction Contrast ◽  
Lattice Fringe ◽  
Tilt Boundaries ◽  
Chemically Vapor Deposited

There have Been a number of studies of low-angle, θ < 4°, [10] tilt boundaries in the diamond lattice. Dislocations with Burgers vectors a/2<110>, a/2<112>, a<111> and a<001> have been reported in melt-grown bicrystals of germanium, and dislocations with Burgers vectors a<001> and a/2<112> have been reported in hot-pressed bicrystals of silicon. Most of the dislocations were found to be dissociated, the dissociation widths being dependent on the tilt angle. Possible dissociation schemes and formation mechanisms for the a<001> and a<111> dislocations from the interaction of lattice dislocations have recently been given.The present study reports on the dislocation structure of a 10° [10] tilt boundary in chemically vapor deposited silicon. The dislocations in the boundary were spaced about 1-3nm apart, making them difficult to resolve by conventional diffraction contrast techniques. The dislocation structure was therefore studied by the lattice-fringe imaging technique.

Formation Mechanisms for Multiply Twinned Particles During Nucleation in the Au/MICA System

1975 ◽  
Vol 33 ◽  
pp. 84-85
Author(s):  
Eal H. Lee ◽  
Helmut Poppa
Keyword(s):  
Deposition Time ◽  
High Vacuum ◽  
Dark Field ◽  
Ultra High Vacuum ◽  
Formation Mechanisms ◽  
Heat Treated ◽  
Cluster Density ◽  
Diffraction Patterns ◽  
Crystal Particle ◽  
Multiply Twinned Particles

The formation of thin films of gold on mica has been studied in ultra-high vacuum (5xl0-10 torr) . The mica substrates were heat-treated for 24 hours at 375°C, cleaved, and annealed for 15 minutes at the deposition temperature of 300°C prior to deposition. An impingement flux of 3x1013 atoms cm-2 sec-1 was used. These conditions were found to give high number densities of multiple twin particles and are based on a systematic series of nucleation experiments described elsewhere. Individual deposits of varying deposition time were made and examined by bright and dark field TEM after "cleavage preparation" of highly transparent specimens. In the early stages of growth, the films generally consist of small particles which are either single crystals or multiply twinned; a strong preference for multiply twinned particles was found whenever the particle number densities were high. Fig. 1 shows the stable cluster density ns and the variation with deposition time of multiple twin particle and single crystal particle densities, respectively. Corresponding micrographs and diffraction patterns are shown in Fig. 2.

Electronic shell structure in clusters as reflected in mass abundance spectra

1999 ◽  
Vol 79 (9) ◽  
pp. 1321-1342
Author(s):  
Svenbjo Rnholm, Jo Rnborggreen
Keyword(s):  
Shell Structure ◽  
Electronic Shell
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