Design and assembly of graded-oxide tantalum porous films from size-selected nanoparticles and dental and biomedical implant application thereof
A dental implant, nanoparticle technology, applied in the design and assembly of hierarchically oxidized tantalum porous membranes made of nanoparticles of selected sizes and its application in dental and biomedical implants, capable of solving controlled Difficulty growing, little effect, etc.
Inactive Publication Date: 2016-08-31
OKINAWA INST OF SCI & TECH SCHOOL
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Problems solved by technology
Unfortunately, the controlled growth of such films is difficult and challenging
Various fabrication techniques have been used, such as sol-gel (Zhang et al. 1998), thin film sputtering (Cheng and Mao 2003), electrodeposition (Lee et al. 2004; Seo et al. 2013), gas phase combustion (Barr et al. 2006), arc source Deposition (Leng et al. 2006), electron beam evaporation (Stella et al. 2009; Bartic et al. 2002) and chemical vapor deposition (Seman et al. 2007), but with little success
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[0075] The inventors used a magnetron sputtering inert gas concentration system to fabricate custom porous films with graded oxidation properties in the direction perpendicular to the substrate assembled from discretely deposited, sized tantalum nanoparticles . The method is relatively inexpensive, versatile, reproducible, and integrates all steps of porous membrane growth into a continuous, well-controlled process (Palmer et al. 2003; Das and Banerjee 2007). Molecular dynamics (MD) computer simulations were employed to enhance the understanding of nanoparticle coalescence during film growth, which largely affects the porosity of the film. Studying tantalum nanoparticles and porous films using aberration-corrected scanning transmission electron microscopy (STEM), high-resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), scanning electron microscopy (SEM) and grazing incidence X-ray diffraction (GIXRD) shape and structure. X-ray photoelectron sp...
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Abstract
A porous film made of size-selected tantalum nanoparticles is formed on a substrate, the porous film having a graded oxidation profile perpendicular to a surface of the substrate.
Description
technical field [0001] The present invention relates to the design and assembly of tantalum membranes and their application to biomedical implants. This application incorporates by reference US Provisional Application No. 61 / 928,321, filed January 16, 2014, in its entirety. Background technique [0002] Nanostructured films of either pure tantalum or its oxides exhibit many interesting properties, such as wide bandgap (Chaneliere et al. 1998), high photocatalytic activity under UV irradiation (Guo and Huang 2011), chemical resistance (Barr et al. 2006 ), high melting point (Stella et al. 2009), good mechanical strength (Chaneliere et al. 1998) and biocompatibility (Leng et al. 2006; Oh et al. 2011). These films have been widely used in storage devices (Lin et al. 1999), supercapacitors (Bartic et al. 2002), orthopedic instruments (Levine et al. 2006), photocatalysts (Goncalves et al. 2012), fuel cells (Seo et al. 2013) and X-ray imaging. agent (Oh et al. 2011; Bonitatibus ...
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IPC IPC(8): B32B9/00A61C8/00A61L27/00C23C14/06
CPCB32B9/00C23C14/165C23C14/228C23C14/5853A61C8/0015A61C13/0006A61C13/0007B32B9/04B32B9/042B32B15/00B32B15/04B32B2255/00B32B2264/00B32B2264/105B32B2307/724B32B2307/726B32B2535/00A61L27/306A61L27/56A61L2300/104A61L2300/404A61L2400/12A61L2430/12B32B9/041H01J37/3405H01J37/3423H01J37/3426C23C14/35A61L31/022A61L31/14A61L31/146C23C14/3414C23C16/50
Inventor M·I·索万
Owner OKINAWA INST OF SCI & TECH SCHOOL