Author: Joseph Daniel PadmosPublisher:
ISBN:
Category :
Languages : en
Pages : 218
Book Description
Surface Modification of Titanium with Gold Nanoparticles and Interaction with Prototype Protein
Author: Joseph Daniel PadmosPublisher:
ISBN:
Category :
Languages : en
Pages : 218
Book Description
Surface Modification Using Gold Nanoparticles
Author: Ann C. GaffeySurface Modification Using Thin Films of Gold Nanoparticles
Author: Alexandria J. BearPublisher:
ISBN:
Category : Gold films
Languages : en
Pages : 84
Book Description
Surface Modification of Gold Nanoparticles and Their Application in Biomolecular Sensing
Author: Sunmook LeeSurface Modification of Titanium for Hard-tissue Engineering Applications
Author: Murali Krishna DuvvuruPublisher:
ISBN: 9780438855076
Category : Mechanical engineering
Languages : en
Pages : 70
Book Description
Titanium (Ti) and its alloys are widely used in dental and orthopedic applications due to their advantages such as biocompatibility, excellent corrosion resistance and mechanical properties like low Young's modulus, low density and high strength as compared to other metallic implants. However, lack of interaction with host tissue (e.g. bioinertness), higher modulus of elasticity as compared to that of bone and resultant stress shielding cause fibrous tissue formation around the implant where the interaction with tissue is minimized. These will eventually cause the implant loosening and revision surgery is needed. Surface modification of Ti by increasing surface roughness and/or incorporation of trace elements where cellular interaction is improved, is a promising technique to enhance the bioactivity. Surface modification can be achieved through alkali treatment, acidic treatment, sol-gel, and electrochemical anodization. Among these techniques, anodization has received significant attention as it allows formation of uniform titanium nanotubes throughout the material. Although this method is simple, low cost and controllable, modification of complicated geometries by this method is a concern. On the other hand, alkali treatment method is available to increase the surface roughness of metals with various geometries by formation of porous network structure. To further increase the bioactivity of biomaterial and enhance the osteointegration, incorporation of trace elements such as strontium (Sr), magnesium (Mg), silver (Ag) and iron (Fe) is beneficial. The objective of this research is to optimize the anodization and alkali treatment techniques, along with Fe deposition using physical vapor deposition (PVD) method. Different anodization conditions, alkali concentrations and Fe coating thicknesses were selected and their effects on surface morphology was studied. Finally, the effects of surface modification alone or in combination with Fe deposition on bone cell interaction will be investigated.
Surface Modification of Titanium Oxide Nanofibers with Silver Nanoparticles for Application as Photocatalysts
Author: Nancy LaiGold Nanoparticles: Synthesis, Surface Modification and Functionalization for Biomedical Applications
Author: Mahmoud SolimanFormation, Characterization and Applications of Gold Nanoparticles and Surface-modified Gold
Author: Janelle Dawn Secl NewmanPublisher:
ISBN:
Category : Colloidal gold
Languages : en
Pages : 350
Book Description
Synthesis and Surface Modification of Silver and Gold Nanoparticles. Nanomedicine Applications Against Glioblastoma Multiforme
Author: Erica LocatelliSurface Engineering of Gold Nanoparticles and Their Applications
Author: Qiu DaiPublisher:
ISBN:
Category : Gold
Languages : en
Pages : 168
Book Description
Gold nanoparticles (AuNPs) with their unique sizes, shapes, and properties have generated much enthusiasm over the last two decades, and have been explored for many potential applications. The successful application of AuNPs depends critically on the ability to modify and functionalize their surface to provide stability, compatibility, and special chemical functionality. This dissertation is aimed at exploring the chemical synthesis and surface modification of AuNPs with the effort to (1) control the number of functional groups on the particle surface, and to (2) increase the colloidal stability at the physiological conditions. To control the functionality on the particle surface, a solid phase place exchange reaction strategy was developed to synthesize the 2 nm AuNPs with a single carboxylic acid group attached on the particle surface. Such monofunctional AuNPs can be treated and used as molecular nanobuilding blocks to form more complex nanomaterials with controllable structures. A "necklace"--Like AuNP/polymer assembly was obtained by conjugating covalently the monofunctional AuNPs with polylysine template, and exhibited an enhanced optical limiting property due to strong electromagnetic interaction between the nanoparticles in close proximity. To improve the colloidal stability in the psychological condition, biocompatible polymers, polyacrylic acid (PAA), and polyethylene glycol (PEG) were used to surface modify the 30 nm citrate-stabilized AuNPs. These polymer-modified AuNPs are able to disperse individually in the high ionic strength solution, and offer as the promising optical probes for bioassay applications. The Prostate specific antigen (PSA) and target DNA can be detected in the low pM range by taking advantages of the large scattering cross section of AuNPs and the high sensitivity of dynamic light scattering (DLS) measurement. In addition to the large scattering cross section, AuNPs can absorb strongly the photon energy at the surface plasmon resonance wavelength and then transform efficiently to the heat energy. The efficient photon-thermal energy conversion property of AuNPs has been used to thermal ablate the A[beta] peptide aggregates under laser irradiation toward Alzheimer's disease therapy.