Methodology and mechanism study on high aspect ratio (HAR) contact bottom image in scanning electron microscopy

2005 ◽  
Author(s):  
H. C. Kang ◽  
J. T. Lim ◽  
J. S. Choi ◽  
T. Y. Lee ◽  
B. H. Lee ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Mechanism Study ◽  
Scanning Electron

POLYAMIDE/POLYESTERAMIDE BASED NANOFIBERS

2011 ◽  
Vol 04 (04) ◽  
pp. 365-368 ◽  
Author(s):  
LENKA MALINOVÁ ◽  
VÁCLAVA BENEŠOVÁ ◽  
DANIELA LUBASOVÁ ◽  
LENKA MARTINOVÁ ◽  
JAN RODA ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aspect Ratio ◽  
Polymer Solution ◽  
High Aspect Ratio ◽  
Electrospinning Method ◽  
Microscopy Images ◽  
Scanning Electron

The formation of novel high aspect ratio nanofibers from polyesteramides based on ε-caprolactam and ε-caprolactone is reported. Nanofibers were prepared by the electrospinning method from polymer solution. Scanning electron microscopy images of nanofiber layers revealed that the diameter of fibers depended on the nature of the solvent or the mixture of solvents used and especially on the composition of polyesteramides.

Interactions between AlN and SiAlON Ceramics

2008 ◽  
Vol 403 ◽  
pp. 97-98
Author(s):  
A. Kalemtas ◽  
Nurcan Calis Acikbas ◽  
Ferhat Kara ◽  
Hasan Mandal ◽  
Kristoffer Krnel ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aspect Ratio ◽  
Reaction Zone ◽  
High Aspect Ratio ◽  
X Ray ◽  
Plasma Sintering ◽  
Reaction Region ◽  
Spark Plasma ◽  
Scanning Electron

In the present study, interactions between AlN and SiAlON laminated couples were investigated after gas pressure (GPS) and spark plasma sintering (SPS) by scanning electron microscopy (SEM) and energy dispersive x-ray analysis (EDX) with the aim to produce laminated composites. In the laminated couples sintered by GPS, a significant reaction zone (~100-150 μm), containing a high aspect ratio of elongated polytypoid grains, was observed at the interface. However, in the case of laminated couples sintered by SPS, a considerably thin reaction region (~2-3 μm) was observed, elongated polytypoid grain formations were also detected.

scholarly journals Conformality of a-Si:H deposited by low temperature PECVD for solar cells application

2021 ◽  
Vol 2086 (1) ◽  
pp. 012041
Author(s):  
A V Uvarov ◽  
A I Baranov ◽  
I A Morozov ◽  
D A Kudryashov ◽  
A A Maksimova ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solar Cells ◽  
Low Temperature ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Pulsed Mode ◽  
Pulsed Regime ◽  
Scanning Electron

Abstract This work is devoted to the study of the deposition of a-Si:H by the PECVD method in continuous and pulsed regime on test structures in the form of trenches with a high aspect ratio. The thicknesses of the layers obtained in these modes were investigated by the method of scanning electron microscopy. It was shown that the layers obtained in the pulsed mode, as compared with the continuous one, have better conformity.

Extraction of Nanocellulose from Sugarcane Bagasse

2014 ◽  
Vol 633-634 ◽  
pp. 550-553 ◽  
Author(s):  
Qing Wang ◽  
Ya Hui Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aspect Ratio ◽  
Sugarcane Bagasse ◽  
High Aspect Ratio ◽  
Acid Treatment ◽  
Scanning Electron ◽  
Nanowire Structure

Sugarcane bagasse was used as start materials to extract nanocellulose fibers. The morphology was investigated by scanning electron microscopy. The result indicated that the nanocellulose is successfully extracted by a series of alkali and acid treatment. The nancellulose is characterized by nanowire structure, and possesses high aspect ratio.

Influence Factors of Calcium Carbonate Whiskers Prepared by Intermittent Bubbling Method

2013 ◽  
Vol 310 ◽  
pp. 80-84 ◽  
Author(s):  
Bei Ping Liu ◽  
Jian Chen ◽  
Fang Bo Liu ◽  
Shi Biao Zhou ◽  
Yuan Dao Chen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Carbonate ◽  
Aspect Ratio ◽  
Smooth Surface ◽  
Influence Factors ◽  
Large Aspect Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Calcium carbonate whiskers were successfully prepared in the MgC12-Ca(OH)2-CO2 system by a intermittent bubbling method and characterized by X-ray diffraction and scanning electron microscopy. The results demonstrated that aragonite style calcium carbonate whiskers with well morphology, large aspect ratio and smooth surface can be obtained by controlling technical conditions such as reaction temperature, concentration of Ca(OH)2 and amount of additives and under the conditions of CO2 flow velocity of 3.4ml/min/gCa(OH)2, flow of CO2 to air ratio of 1:4, stirring speed of 240 r/min.

Creating Biomaterials Inspired by the Microstructure of Cuttlebone

2010 ◽  
Vol 654-656 ◽  
pp. 2229-2232 ◽  
Author(s):  
Joseph Cadman ◽  
Yu Hang Chen ◽  
Shi Wei Zhou ◽  
Qing Li
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Aspect Ratio ◽  
Young’S Moduli ◽  
Proportional Relationship ◽  
Scanning Electron ◽  
Good Agreement

The microstructure of cuttlebone is investigated using Scanning Electron Microscopy (SEM). A graded aspect ratio of the base cells between layers is evident in some samples. A method for designing graded biomaterials mimicking this cuttlebone microstructure is developed. Simplified 3D biomaterial samples are created using CAD software. These biomaterials are fabricated using a stereolithographic apparatus (SLA). The homogenisation technique is used to evaluate the mechanical properties of the original cuttlebone sample and the fabricated biomaterial sample. Good agreement is found between the Young’s moduli of corresponding layers. However, it is inconclusive whether the Young’s moduli have a proportional relationship to the aspect ratio of the base cell at this stage of the study.

Pathogenesis of Human Hair Defects

1974 ◽  
Vol 32 ◽  
pp. 12-13
Author(s):  
P.S. Porter ◽  
T. Aoyagi ◽  
R. Matta
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Human Hair ◽  
Standard Techniques ◽  
Scanning Electron

Using standard techniques of scanning electron microscopy (SEM), over 1000 human hair defects have been studied. In several of the defects, the pathogenesis of the abnormality has been clarified using these techniques. It is the purpose of this paper to present several distinct morphologic abnormalities of hair and to discuss their pathogenesis as elucidated through techniques of scanning electron microscopy.

Ultrastructural Analysis of the Salivary Glands of Gromphadorhina Portentosa (Schaum)

1977 ◽  
Vol 35 ◽  
pp. 638-639
Author(s):  
P.J. Dailey
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Salivary Glands ◽  
Secretory Vesicles ◽  
The Past ◽  
Transmission Electron ◽  
Means Of Transmission ◽  
Gromphadorhina Portentosa ◽  
Scanning Electron ◽  
Topographical Relief

The structure of insect salivary glands has been extensively investigated during the past decade; however, none have attempted scanning electron microscopy (SEM) in ultrastructural examinations of these secretory organs. This study correlates fine structure by means of SEM cryofractography with that of thin-sectioned epoxy embedded material observed by means of transmission electron microscopy (TEM).Salivary glands of Gromphadorhina portentosa were excised and immediately submerged in cold (4°C) paraformaldehyde-glutaraldehyde fixative1 for 2 hr, washed and post-fixed in 1 per cent 0s04 in phosphosphate buffer (4°C for 2 hr). After ethanolic dehydration half of the samples were embedded in Epon 812 for TEM and half cryofractured and subsequently critical point dried for SEM. Dried specimens were mounted on aluminum stubs and coated with approximately 150 Å of gold in a cold sputtering apparatus.Figure 1 shows a cryofractured plane through a salivary acinus revealing topographical relief of secretory vesicles.

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