Fabrication and Characterization of Uranium Oxide Doped Sol−Gel Planar Waveguides for Attenuated Total Reflectance Spectrometry

1997 ◽  
Vol 9 (11) ◽  
pp. 2599-2603
Author(s):  
Paul L. Edmiston ◽  
S. Scott Saavedra
Keyword(s):  
Uranium Oxide ◽  
Sol Gel ◽  
Planar Waveguides ◽  
Attenuated Total Reflectance ◽  
Reflectance Spectrometry ◽  
Total Reflectance ◽  
Fabrication And Characterization

Fabrication and Characterization of Low-Loss, Sol-Gel Planar Waveguides

1994 ◽  
Vol 66 (8) ◽  
pp. 1254-1263 ◽  
Author(s):  
Lin. Yang ◽  
S. Scott. Saavedra ◽  
Neal R. Armstrong ◽  
John. Hayes
Keyword(s):  
Sol Gel ◽  
Planar Waveguides ◽  
Low Loss ◽  
Fabrication And Characterization

scholarly journals FIBROUS SILICA-HYDROXYAPATITE COMPOSITE BY ELECTROSPINNING

2017 ◽  
Vol 5 (2) ◽  
pp. 39-47 ◽  
Author(s):  
Jesús Alberto Garibay-Alvarado ◽  
León Francisco Espinosa-Cristóbal ◽  
Simón Yobanny Reyes-López
Keyword(s):  
Sol Gel ◽  
Average Diameter ◽  
Bone Defects ◽  
Attenuated Total Reflectance ◽  
Chemical Bonds ◽  
Total Reflectance ◽  
Hydroxyapatite Composite ◽  
Coaxial Fibers ◽  
Chemical Groups

New nanocomposite membrane was fabricated by electrospinning. The nanocomposite combines a glass and hydroxyapatite (HA). This research proposed the incorporation of glass to counteract the brittleness of HA in a composite formed by coaxial fibers which will be used for bone replacement. Calcium phosphate ceramics are used widely for dental and orthopedic reasons, because they can join tightly through chemical bonds and promote bone regeneration. Precursors HA and SiO2 were synthetized through the sol-gel method and then incorporated into a polymeric PVP matrix; later they were processed by coaxial electrospinning to obtain fibers with an average diameter of 538 nm which were characterized with techniques such as Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy, Differential Thermal Analysis and Scanning Electron Microscopy. Chemical and physical characterization of the membranes evidenced fibers in a coaxial disposition with a glass core and hydroxyapatite cover. The micro-porous fibers have many potential uses in the repair and treatment of bone defects, drug delivery and tissue engineering. Through ATR-FTIR and SEM-EDX analysis the presence of characteristic chemical groups, the fiber composition and microstructure were determined.

Fabrication and characterization of chitosan/gelatin/thermoplastic polyurethane blend nanofibers

2018 ◽  
Vol 1 ◽  
pp. 251522111876932 ◽  
Author(s):  
Sadaf Samimi Gharaie ◽  
Sima Habibi ◽  
Hosein Nazockdast
Keyword(s):  
Thermoplastic Polyurethane ◽  
Attenuated Total Reflectance ◽  
Scanning Calorimetry ◽  
Polymer Blending ◽  
Total Reflectance ◽  
Mean Diameter ◽  
Fabrication And Characterization ◽  
Reflectance Ftir ◽  
Scanning Electron

Polymer blending is a method to provide nanocomposite nanofibers with improved strength and minimal defects. Chitosan exhibits biocompatibility, biodegradability, antimicrobial activity, and wound healing properties. A combination of gelatin and thermoplastic polyurethane (TPU) blends was explored as a means to improve the morphological deficiencies of chitosan nanofibers and facilitate its electrospinnability. The morphology of the electrospun chitosan, chitosan/gelatin, and chitosan/gelatin/TPU blend nanofibers were characterized using scanning electron microscopy (SEM), while the miscibility and thermal behavior of the blends were determined using differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy/attenuated total reflectance (FTIR/ATR). The optimum results were achieved in blend with 3 wt% chitosan, 8 wt% gelatin, and 5 wt% TPU, which resulted nanofibers with a mean diameter of 100.6 nm ± 17.831 nm.

Fabrication and characterization of sol‐gel planar waveguides doped with rare‐earth ions

1996 ◽  
Vol 69 (7) ◽  
pp. 895-897 ◽  
Author(s):  
X. Orignac ◽  
D. Barbier ◽  
X. M. Du ◽  
R. M. Almeida
Keyword(s):  
Rare Earth ◽  
Sol Gel ◽  
Rare Earth Ions ◽  
Planar Waveguides ◽  
Fabrication And Characterization

scholarly journals Electrospun Membranes Based on Polycaprolactone, Nano-Hydroxyapatite and Metronidazole

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 931
Author(s):  
Ioana-Codruţa Mirică ◽  
Gabriel Furtos ◽  
Ondine Lucaciu ◽  
Petru Pascuta ◽  
Mihaela Vlassa ◽  
...  
Keyword(s):  
Fiber Diameter ◽  
Maximum Load ◽  
Guided Bone Regeneration ◽  
Attenuated Total Reflectance ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Total Reflectance ◽  
X Ray ◽  
Electrospun Membranes

The aim of this research was to develop new electrospun membranes (EMs) based on polycaprolactone (PCL) with or without metronidazole (MET)/nano-hydroxyapatite (nHAP) content. New nHAP with a mean diameter of 34 nm in length was synthesized. X-ray diffraction (XRD) and attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR) were used for structural characterization of precursors and EMs. The highest mechanical properties (the force at maximum load, Young’s modulus and tensile strength) were found for the PCL membranes, and these properties decreased for the other samples in the following order: 95% PCL + 5% nHAP > 80% PCL + 20% MET > 75% PCL + 5% nHAP + 20% MET. The stiffness increased with the addition of 5 wt.% nHAP. The SEM images of EMs showed randomly oriented bead-free fibers that generated a porous structure with interconnected macropores. The fiber diameter showed values between 2 and 16 µm. The fiber diameter increased with the addition of nHAP filler and decreased when MET was added. New EMs with nHAP and MET could be promising materials for guided bone regeneration or tissue engineering.

Fabrication and characterization of highly pure and homogeneous YBa2Cu3O7superconductors from sol‐gel derived powders

1991 ◽  
Vol 69 (2) ◽  
pp. 867-873 ◽  
Author(s):  
Masato Kakihana ◽  
Lars Börjesson ◽  
Sten Eriksson ◽  
Peter Svedlindh
Keyword(s):  
Sol Gel ◽  
Fabrication And Characterization

scholarly journals Fabrication of Superconducting Nanowires Using the Template Method

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1970
Author(s):  
Michael Rudolf Koblischka ◽  
Anjela Koblischka-Veneva
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Sol Gel ◽  
Template Method ◽  
Aao Template ◽  
Superconducting Nanowires ◽  
Research Directions ◽  
Templating Method ◽  
Fabrication And Characterization

The fabrication and characterization of superconducting nanowires fabricated by the anodic aluminium oxide (AAO) template technique has been reviewed. This templating method was applied to conventional metallic superconductors, as well as to several high-temperature superconductors (HTSc). For filling the templates with superconducting material, several different techniques have been applied in the literature, including electrodeposition, sol-gel techniques, sputtering, and melting. Here, we discuss the various superconducting materials employed and the results obtained. The arising problems in the fabrication process and the difficulties concerning the separation of the nanowires from the templates are pointed out in detail. Furthermore, we compare HTSc nanowires prepared by AAO templating and electrospinning with each other, and give an outlook to further research directions.

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