scholarly journals Giant Positive Magnetoresistance: Bipolar Conduction and Giant Positive Magnetoresistance in Doped Metallic Titanium Oxide Heterostructures (Adv. Mater. Interfaces 9/2021)

2021 ◽  
Vol 8 (9) ◽  
pp. 2170046
Author(s):  
Ke Huang ◽  
Tao Wang ◽  
Mengjia Jin ◽  
Liang Wu ◽  
Junyao Floria Wang ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Metallic Titanium ◽  
Oxide Heterostructures ◽  
Positive Magnetoresistance ◽  
Bipolar Conduction

Photo-electrochemistry of metallic titanium/mixed phase titanium oxide

2021 ◽  
Author(s):  
Sara Amouzad ◽  
Mehdi Khosravi ◽  
Niaz Monadi ◽  
Behzad Haghighi ◽  
Suleyman I. Allakhverdiev ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Mixed Phase ◽  
Metallic Titanium

Interface in Hydroxylapatite Coated Ti6Al4V Alloys

Volume 1 ◽  
2004 ◽  
Author(s):  
Celalettin Ergun ◽  
Zafer Evis ◽  
Robert H. Doremus
Keyword(s):  
Thermal Analysis ◽  
Calcium Phosphate ◽  
Titanium Oxide ◽  
Titanium Powder ◽  
Hot Isostatic Pressing ◽  
Interface Reaction ◽  
Metallic Titanium ◽  
Epma Analysis ◽  
Line Scanning ◽  
Hydroxylapatite Coatings

The aim of the present study is to develop a better understanding of the interface reaction between hydroxylapatite and Ti6Al4V alloys. Hydroxylapatite coatings on Ti6Al4V, Hydroxylapatite-metallic titanium powder, hydroxylapatite-titania composites were prepared via air sintering and/or hot isostatic pressing (HIP). The reaction between components was monitored with EPMA line scanning technique, XRD, and thermal analysis. EPMA analysis on the interface between the hydroxylapatite and Ti6Al4V alloy showed interdiffusion profiles of all the hydroxylapatite and alloy elements suggesting interfacial bonding. The experiments on the composites showed no significant reaction between hydroxylapatite and metallic titanium in the vacuum environment. However, a reaction occurred between hydroxylapatite and titanium oxide, which formed CaTiO3 with a perovskite structure, Ca3(PO4)2 (tri-calcium phosphate; whitlockite) and water. Presence of air in the sintering environment promoted this reaction.

scholarly journals Oscillatory Exchange Coupling and Positive Magnetoresistance in Epitaxial Oxide Heterostructures

2000 ◽  
Vol 85 (17) ◽  
pp. 3728-3731 ◽  
Author(s):  
K. R. Nikolaev ◽  
A. Yu. Dobin ◽  
I. N. Krivorotov ◽  
W. K. Cooley ◽  
A. Bhattacharya ◽  
...  
Keyword(s):  
Exchange Coupling ◽  
Oxide Heterostructures ◽  
Positive Magnetoresistance ◽  
Epitaxial Oxide

Electron Holographic Nano-Characterization of Gold Catalyst at Interface

2002 ◽  
Vol 727 ◽  
Author(s):  
S. Ichikawa ◽  
T. Akita ◽  
M. Okumura ◽  
M. Haruta ◽  
K. Tanaka
Keyword(s):  
Contact Angle ◽  
Titanium Oxide ◽  
Gold Catalyst ◽  
Three Dimensional ◽  
High Resolution Electron Microscopy ◽  
Electron Holography ◽  
Gold Particles ◽  
Oxide Support ◽  
The Mean ◽  
A Charge

AbstractThe catalytic properties of nanostructured gold catalyst are known to depend on the size of the gold particles and to be activated when the size decreases to a few nanometers. We investigated the size dependence of the three-dimensional nanostructure on the mean inner potential of gold catalysts supported on titanium oxide using electron holography and high-resolution electron microscopy (HREM). The contact angle of the gold particles on the titanium oxide tended to be over 90° for gold particles with a size of over 5 nm, and below 90° for a size of below 2 nm. This decreasing change in the contact angle (morphology) acts to increase the perimeter and hence the area of the interface between the gold and titanium oxide support, which is considered to be an active site for CO oxidation. The mean inner potential of the gold particles also changed as their size decreased. The value of the inner potential of gold, which is approximately 25 V in bulk state, rose to over 40 V when the size of the gold particles was less than 2 nm. This phenomenon indicates the existence of a charge transfer at the interface between gold and titanium oxide. The 3-D structure change and the inner potential change should be attributed to the specific electronic structure at the interface, owing to both the “nano size effect” and the “hetero-interface effect.”

Titanium Oxide Nanoparticles Improve the Chemotherapeutic Action of Erlotinib in Liver Cancer Cells

2020 ◽  
Vol 16 (4) ◽  
pp. 337-343
Author(s):  
Shaimaa E. Abdel-Ghany ◽  
Eman El-Sayed ◽  
Nour Ashraf ◽  
Nada Mokhtar ◽  
Amany Alqosaibi ◽  
...  
Keyword(s):  
Liver Cancer ◽  
Cancer Cells ◽  
Titanium Oxide ◽  
Phase Distribution ◽  
Oxide Nanoparticles ◽  
Titanium Oxide Nanoparticles ◽  
Liver Cancer Cells ◽  
M Phase ◽  
Apoptosis Detection ◽  
Novel Method

Background: Hepatocellular carcinoma is the second leading cause of cancer-related deaths among other types of cancer due to lack of effective treatments and late diagnosis. Nanocarriers represent a novel method to deliver chemotherapeutic drugs, enhancing their bioavailability and stability. Methods: In the present study, we loaded gold nanoparticles (AuNPs) and titanium oxide nanoparticles (TiO2NPs) with ERL to investigate the efficiency of the formed composite in inducing apoptosis in HepG2 liver cancer cells. Cytotoxicity was assessed using MTT assay and cell phase distribution was assessed by flow cytometry along with apoptosis detection. Results: Data obtained indicated the efficiency of the formed composite to significantly induce cell death and arrest cell cycle and G2/M phase. IRF4 was downregulated after treatment with loaded ERL. Conclusion: Our data showed that loading ERL on TiO2NPs was more efficient than AuNPs. However, both nanocarriers were efficient compared with control.

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