Oxide Mediated Epitaxy on Planar and Non-Planar Si

1998 ◽  
Vol 514 ◽  
Author(s):  
R. T. Tung ◽  
D. J. Howard ◽  
S. Ohmi ◽  
M. Caymax ◽  
K. Maex
Keyword(s):  
Thin Layer ◽  
Barrier Layer ◽  
Silicon Oxide ◽  
Shallow Junction ◽  
Planar Surfaces ◽  
Thermal Oxide ◽  
Deposition Direction ◽  
Grown Thermal Oxide

ABSTRACTThe recently developed oxide mediated epitaxy (OME) technique involves the growth of epitaxial CoSi2 through a thin layer of silicon oxide grown in peroxide baths. Here we report improvements of the OME technique from the use of in-situ grown thermal oxide as the barrier layer and post-growth oxygen anneals. Growth of uniform epitaxial CoSi2 layers by OME on non-planar surfaces of selectively deposited CVD Si layers with oxide and nitride patterns was also demonstrated. Both the epitaxial orientation of CoSi2 and the thickness of the CoSi2 layer, measured along the deposition direction, remained unchanged across facet boundaries. OME appears well suited for shallow-junction silicidation application in devices involving raised source/drain structures.

scholarly journals Ferromagnetic soft catheter robots for minimally invasive bioprinting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Cheng Zhou ◽  
Youzhou Yang ◽  
Jiaxin Wang ◽  
Qingyang Wu ◽  
Zhuozhi Gu ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
The Body ◽  
Magnetic Actuation ◽  
Internal Organs ◽  
Planar Surfaces ◽  
Reinforced Polymer ◽  
Direct Fabrication ◽  
Digitally Controlled

AbstractIn vivo bioprinting has recently emerged as a direct fabrication technique to create artificial tissues and medical devices on target sites within the body, enabling advanced clinical strategies. However, existing in vivo bioprinting methods are often limited to applications near the skin or require open surgery for printing on internal organs. Here, we report a ferromagnetic soft catheter robot (FSCR) system capable of in situ computer-controlled bioprinting in a minimally invasive manner based on magnetic actuation. The FSCR is designed by dispersing ferromagnetic particles in a fiber-reinforced polymer matrix. This design results in stable ink extrusion and allows for printing various materials with different rheological properties and functionalities. A superimposed magnetic field drives the FSCR to achieve digitally controlled printing with high accuracy. We demonstrate printing multiple patterns on planar surfaces, and considering the non-planar surface of natural organs, we then develop an in situ printing strategy for curved surfaces and demonstrate minimally invasive in vivo bioprinting of hydrogels in a rat model. Our catheter robot will permit intelligent and minimally invasive bio-fabrication.

Versatile thin layer spectroelectrochemical cell employing specular reflectance

1987 ◽  
Vol 65 (5) ◽  
pp. 919-923 ◽  
Author(s):  
A. Scott Hinman ◽  
Brad J. Pavelich
Keyword(s):  
Thin Layer ◽  
Specular Reflection ◽  
Incident Light ◽  
Tetrabutylammonium Perchlorate ◽  
Specular Reflectance ◽  
Advantages And Disadvantages ◽  
Ftir Characterization ◽  
Sandwich Type

A versatile thin layer spectroelectrochemical cell employing specular reflection of the incident light beam from the electrode surface is described. Its application to in-situ uv–vis and FTIR characterization of the products of electrochemical reactions and to thin layer voltammetry and coulometry as well as conventional cyclic voltammetry is demonstrated for the oxidation of tetraphenylporphinatozinc in dichloroethane/tetrabutylammonium perchlorate solution. The advantages and disadvantages of this type of cell as compared to more conventional sandwich type optically transparent thin layer electrodes are discussed.

Electrochemical and spectroscopic study of vitamin D2 by in situ thin layer CD spectroelectrochemistry

2001 ◽  
Vol 510 (1-2) ◽  
pp. 103-107 ◽  
Author(s):  
Xiaoqiang Liu ◽  
Kuaizhi Liu ◽  
Guangjin Cheng ◽  
Shaojun Dong
Keyword(s):  
Thin Layer ◽  
Spectroscopic Study ◽  
Vitamin D2

Thin-layer chromatography with in situ multichannel image detection of fluorescent compounds

1981 ◽  
Vol 53 (9) ◽  
pp. 1357-1361 ◽  
Author(s):  
M. L. Gianelli ◽  
J. B. Callis ◽  
G. D. Christian ◽  
N. H. Andersen ◽  
G. D. Christian
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Image Detection ◽  
Layer Chromatography ◽  
Fluorescent Compounds

scholarly journals Quantitative Analysis of Sulpiride and Impurities of 2-Aminomethyl-1-Ethylpyrrolidine and Methyl-5-Sulphamoyl-2-Methoxybenzoate in Pharmaceuticals by High-Performance Thin-Layer Chromatography and Scanning Densitometry

1999 ◽  
Vol 82 (4) ◽  
pp. 825-829 ◽  
Author(s):  
Danica Agbaba ◽  
Tatjana Miljkovic ◽  
Valentina Marinkovic ◽  
Dobrila Zivanov-Stakic ◽  
Sote Vladimirov
Keyword(s):  
Quantitative Analysis ◽  
Thin Layer ◽  
High Performance ◽  
Methylene Chloride ◽  
Solvent System ◽  
Ammonia Solution ◽  
Dosage Forms ◽  
Raw Material ◽  
Layer Chromatography

Abstract A simple and reliable thin-layer chromatographic method for determining sulpiride and impurities of 2-aminomethyl-1-ethylpyrrolidine and methyl-5-sulphamoyl-2-methoxybenzoate was developed and validated. A methylene chloride–methanol–ammonia solution (25%; 18 + 2.8 + 0.4, v/v) solvent system is used for separation and quantitative evaluation of chromatograms. The chromatographic plate is first scanned at 240 nm to locate chromatographic zones corresponding to sulpiride and methyl-5-sulphamoyl-2-methoxybenzoate. Then 2-aminomethyl-1-ethylpyrrolidine is derivatized in situ with ninhydrin, and resulting colored spots are measured at 500 nm. The method is reproducible and convenient for quantitative analysis and purity control of sulpiride in its raw material and in its dosage forms.

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