scholarly journals Synthesis of diamond fine particles on levitated seed particles in a rf CH4/H2 plasma chamber equipped with a hot filament

2012 ◽  
Vol 112 (7) ◽  
pp. 073303
Author(s):  
S. Shimizu ◽  
T. Shimizu ◽  
H. M. Thomas ◽  
G. Matern ◽  
R. W. Stark ◽  
...  
Keyword(s):  
Fine Particles ◽  
Plasma Chamber ◽  
Seed Particles ◽  
Hot Filament ◽  
Diamond Fine

scholarly journals Levitation and collection of diamond fine particles in the rf plasma chamber equipped with a hot filament

2011 ◽  
Vol 18 (11) ◽  
pp. 113703 ◽  
Author(s):  
S. Shimizu ◽  
T. Shimizu ◽  
W. Jacob ◽  
H. M. Thomas ◽  
G. E. Morfill
Keyword(s):  
Fine Particles ◽  
Rf Plasma ◽  
Plasma Chamber ◽  
Hot Filament ◽  
Diamond Fine

Specific Surface Area of Carbon Fine Particles Including Single-Walled Carbon Nanotubes Synthesized by Hot-Filament Plasma Assisted Chemical Vapor Deposition

2014 ◽  
Vol 1586 ◽  
Author(s):  
Ryuhei Yamada ◽  
Yasuhiro Masaki ◽  
Yasuaki Hayashi
Keyword(s):  
Carbon Nanotubes ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Vapor Deposition ◽  
Fine Particles ◽  
Chemical Vapor ◽  
Single Walled Carbon Nanotubes ◽  
Hot Filament ◽  
Walled Carbon Nanotubes

ABSTRACTCarbon fine particles including single-walled carbon nanotubes (SWNTs) were synthesized by hot-filament and plasma assisted chemical vapor deposition. Specific surface area was evaluated for carbon fine particles synthesized under optimized conditions along with purified SWNTs and multi-walled carbon nanotubes (MWNTs) for comparison. The value of specific surface area for the synthesized carbon fine particles was smaller than the SWNTs, but larger than the MWNTs. Pore size distribution was analyzed with desorption isotherms by the DH method. Although smaller pores are included in the purified SWNTs than the synthesized carbon fine particles, pores of size larger than several nm were included more in the synthesized carbon fine particles.

Diamond nucleation by carbon fibers on unscratched substrate by hot-filament chemical vapor deposition

1994 ◽  
Vol 9 (7) ◽  
pp. 1619-1621 ◽  
Author(s):  
Yoshikazu Nakamura ◽  
Kazunori Tamaki ◽  
Yoshihisa Watanabe ◽  
Shigekazu Hirayama
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Fibers ◽  
Vapor Deposition ◽  
Fine Particles ◽  
Chemical Vapor ◽  
Nucleation Site ◽  
Cvd Method ◽  
Diamond Particles ◽  
Hot Filament Cvd ◽  
Hot Filament

In order to overcome the difficulty of nucleation of diamond particles on unscratched substrates by the chemical vapor deposition (CVD) method, carbon fibers are introduced on unscratched substrates as a nucleation site of diamond particles. With assistance of carbon fibers, diamond particles can be synthesized on unscratched silicon substrate from a gas mixture of methane and hydrogen by the hot-filament CVD method. From SEM observations, nucleation of diamond particles has been confirmed on fibers at the beginning of deposition. Fine particles have formed initially on the rugged surface of fibers, and then they grow up to be diamond particles. Detailed SEM observations reveal nucleation has occurred on irregular surfaces such as boundaries on carbon fibers. We propose that nucleation of diamond particles can be controlled by arranging carbon fibers on the substrate without applying any mechanical pretreatment.

scholarly journals Reaction Sintering of Si Coated-Diamond Fine Particles under Ultrahigh Pressure.

1998 ◽  
Vol 7 ◽  
pp. 1010-1012
Author(s):  
S. Kume ◽  
K. Suzuki ◽  
H. Yoshida ◽  
Y. Yamada ◽  
T. Fuyuki ◽  
...  
Keyword(s):  
Fine Particles ◽  
Ultrahigh Pressure ◽  
Reaction Sintering ◽  
Diamond Fine

scholarly journals Electroless Coating of Ni Thin Layer on Diamond Fine Particles by Means of Photo-Catalytic Pd-Nucleation

1987 ◽  
Vol 95 (1099) ◽  
pp. 351-356
Author(s):  
Nobuyuki OTSUKA ◽  
Mamoru ADACHI ◽  
Minoru ADACHI ◽  
Naosuke ADACHI ◽  
Takeshi ASAI ◽  
...  
Keyword(s):  
Thin Layer ◽  
Fine Particles ◽  
Electroless Coating ◽  
Diamond Fine

Cytoplasmic Organization in the Receptor Cells of the Crista Ampullaris

1972 ◽  
Vol 30 ◽  
pp. 60-61 ◽  
Author(s):  
Robert F. Dunn
Keyword(s):  
Fine Particles ◽  
Apical Cell ◽  
Apical Region ◽  
Receptor Cells ◽  
Cuticular Plate ◽  
Morphological Organization ◽  
Crista Ampullaris ◽  
Cytoplasmic Organization ◽  
High Degree ◽  
General Appearance

Receptor cells of the cristae in the vestibular labyrinth of the bullfrog, Rana catesbiana, show a high degree of morphological organization. Four specialized regions may be distinguished: the apical region, the supranuclear region, the paranuclear region, and the basilar region.The apical region includes a single kinocilium, approximately 40 stereocilia, and many small microvilli all projecting from the apical cell surface into the lumen of the ampulla. A cuticular plate, located at the base of the stereocilia, contains filamentous attachments of the stereocilia, and has the general appearance of a homogeneous aggregation of fine particles (Fig. 1). An accumulation of mitochondria is located within the cytoplasm basal to the cuticular plate.

Bright-Field Images (Ctem) of Phase Objects at High Resolution

1976 ◽  
Vol 34 ◽  
pp. 490-491 ◽  
Author(s):  
Sumio Iijima
Keyword(s):  
High Resolution ◽  
Electron Beam Irradiation ◽  
Fine Particles ◽  
High Resolution Electron Microscopy ◽  
Good Test ◽  
Resolution Electron ◽  
Single Crystal Films ◽  
Crystal Films ◽  
By Products ◽  
Test Objects

We have developed a technique to prepare thin single crystal films of graphite for use as supporting films for high resolution electron microscopy. As we showed elsewhere (1), these films are completely noiseless and therefore can be used in the observation of phase objects by CTEM, such as single atoms or molecules as a means for overcoming the difficulties because of the background noise which appears with amorphous carbon supporting films, even though they are prepared so as to be less than 20Å thick. Since the graphite films are thinned by reaction with WO3 crystals under electron beam irradiation in the microscope, some small crystallites of WC or WC2 are inevitably left on the films as by-products. These particles are usually found to be over 10-20Å diameter but very fine particles are also formed on the film and these can serve as good test objects for studying the image formation of phase objects.

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