Controlled Synthesis of Hollow Hemispheric ZnO Shells/Cages on Graphite Fiber

Hollow hemispheric ZnO shells/cages are synthesized on graphite fiber via simple thermal evaporation process. The cage-like ZnO structures exhibit micron or submicron size and hollow hemispheric shape with polycrystalline shell made of the ZnO nanocrystals. Controlled time-sequenced growth experiment is conducted to interpret the growth process, which indicates that the growth mechanism of the hollow hemispheric ZnO shells/cages involves formation of Zn particles firstly, followed by oxidation of the outer surface of Zn droplets and meantime sublimation of the core Zn.

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Zn-INDUCED DENSITY-CONTROLLED GROWTH OF β-SiC NANOTUBES WITH TUNABLE FIELD EMISSION AND HYDROPHOBIC PROPERTIES

NANO ◽

10.1142/s1793292011002767 ◽

2011 ◽

Vol 06 (05) ◽

pp. 441-453 ◽

Cited By ~ 5

Author(s):

G. Z. YANG ◽

H. CUI ◽

C. X. WANG

Keyword(s):

Field Emission ◽

Growth Mechanism ◽

Growth Process ◽

Large Scale ◽

Thermal Evaporation ◽

Strong Dependence ◽

Silicon Wafers ◽

Controlled Growth ◽

Hydrophobic Properties ◽

Single Crystalline

Density-controlled single-crystalline β- SiC nanotubes were successfully synthesized on a large scale by adding Zn into the system via direct thermal evaporation of C 60 onto silicon wafers at 1290°C. Interestingly, no Zn elements can be detected in the final products. However, the addition of Zn power is important because without Zn , density-controlled SiC nanotubes cannot be observed in our experiment. On the basis of the results, a possible growth mechanism was proposed to illustrate the role that Zn played in the growth process. The field emission and hydrophobic performances show strong dependence on the densities of as-synthesized β- SiC nanotubes. The density-controlled β- SiC nanotubes with tunable field emission and hydrophobic properties may have potential in the future of nanotechnology.

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Morphology and growth mechanism of novel zinc oxide nanostructures synthesized by a carbon thermal evaporation process

CrystEngComm ◽

10.1039/c2ce25183c ◽

2012 ◽

Vol 14 (17) ◽

pp. 5407 ◽

Cited By ~ 5

Author(s):

Feng Shi ◽

Chengshan Xue

Keyword(s):

Zinc Oxide ◽

Growth Mechanism ◽

Thermal Evaporation ◽

Evaporation Process ◽

Zinc Oxide Nanostructures ◽

Oxide Nanostructures

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Microcosmic Growth Process of ZnO Microrods

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.47-50.1055 ◽

2008 ◽

Vol 47-50 ◽

pp. 1055-1058

Author(s):

Wei Wei Wang ◽

Li Ping Zhu ◽

Zhi Zhen Ye ◽

Jing Rui Wang ◽

Ye Feng Yang ◽

...

Keyword(s):

Growth Mechanism ◽

Growth Process ◽

Thermal Evaporation ◽

Zno Nanorods ◽

Electronic Microscopy ◽

Epitaxial Relationship ◽

Sem Images ◽

Transmission Electronic Microscopy

ZnO microrods were synthesized on Si (111) sustrate by thermal evaporation at the temperature of 700 °C. Different growth environments bring to the different morphologies of the depositions. By analyzing the scanning electrical microscopy (SEM) images, a growth mechanism of the microrods is schematically put forward. Transmission electronic microscopy (TEM) images show that the perfectly epitaxial relationship between the ZnO nanorods and microrods.

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A scanning electron microscopic study on dissolving process of cholesterol gallstones by chenodeoxycholic acid (CDCA)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100083485 ◽

1978 ◽

Vol 36 (2) ◽

pp. 522-523

Author(s):

T. Kanetaka ◽

M. Cho ◽

S. Kawamura ◽

T. Sado ◽

K. Hara

Keyword(s):

Electron Microscope ◽

Chenodeoxycholic Acid ◽

Outer Surface ◽

Electron Microscopic ◽

Cholesterol Gallstones ◽

The Core ◽

Scanning Electron Microscopic Study ◽

Scanning Electron Microscopic ◽

Acceleration Voltage ◽

Scanning Electron

The authors have investigated the dissolution process of human cholesterol gallstones using a scanning electron microscope(SEM). This study was carried out by comparing control gallstones incubated in beagle bile with gallstones obtained from patients who were treated with chenodeoxycholic acid(CDCA).The cholesterol gallstones for this study were obtained from 14 patients. Three control patients were treated without CDCA and eleven patients were treated with CDCA 300-600 mg/day for periods ranging from four to twenty five months. It was confirmed through chemical analysis that these gallstones contained more than 80% cholesterol in both the outer surface and the core.The specimen were obtained from the outer surface and the core of the gallstones. Each specimen was attached to alminum sheet and coated with carbon to 100Å thickness. The SEM observation was made by Hitachi S-550 with 20 kV acceleration voltage and with 60-20, 000X magnification.

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