scholarly journals The Potential of a Nanostructured Titanium Oxide Layer with Self-Assembled Monolayers for Biomedical Applications: Surface Properties and Biomechanical Behaviors

2020 ◽  
Vol 10 (2) ◽  
pp. 590 ◽  
Author(s):  
Wen-Chien Lan ◽  
Ta-Sen Huang ◽  
Yung-Chieh Cho ◽  
Yueh-Tzu Huang ◽  
Christopher J. Walinski ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Surface Properties ◽  
Contact Stiffness ◽  
Substrate Surface ◽  
Stress Shielding ◽  
Shielding Effect ◽  
Self Assembled Monolayers ◽  
Nanostructured Titanium ◽  
Assembled Monolayers ◽  
Self Assembled

This study investigated the surface properties and biomechanical behaviors of a nanostructured titanium oxide (TiO) layer with different self-assembled monolayers (SAMs) of phosphonate on the surface of microscope slides. The surface properties of SAMs were analyzed using scanning electron microscopy, X-ray photoemission spectroscopy, and contact angle goniometry. Biomechanical behaviors were evaluated using nanoindentation with a diamond Berkovich indenter. Analytical results indicated that the homogenous nanostructured TiO surface was formed on the substrate surface after the plasma oxidation treatment. As the TiO surface was immersed with 11-phosphonoundecanoic acid solution (PUA-SAM/TiO), the formation of a uniform SAM can be observed on the sample surface. Moreover, the binding energy of O 1s demonstrated the presence of the bisphosphonate monolayer on the SAMs-coated samples. It was also found that the PUA-SAM/TiO sample not only possessed a higher wettability performance, but also exhibited low surface contact stiffness. A SAM surface with a high wettability and low contact stiffness could potentially promote biocompatibility and prevent the formation of a stress shielding effect. Therefore, the self-assembled technology is a promising approach that can be applied to the surface modification of biomedical implants for facilitating bone healing and osseointegration.

Large area nanopatterning of alkylphosphonate self-assembled monolayers on titanium oxide surfaces by interferometric lithography

Nanoscale ◽  
2011 ◽  
Vol 3 (6) ◽  
pp. 2511 ◽  
Author(s):  
Getachew Tizazu ◽  
Osama El-Zubir ◽  
Steven R. J. Brueck ◽  
David G. Lidzey ◽  
Graham J. Leggett ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Self Assembled Monolayers ◽  
Oxide Surfaces ◽  
Large Area ◽  
Interferometric Lithography ◽  
Assembled Monolayers ◽  
Self Assembled

Synthesis of Bismuth Titanate Thin Films by Liquid-Phase Self-Assembled Monolayers

2012 ◽  
Vol 512-515 ◽  
pp. 1175-1179
Author(s):  
Han Lin ◽  
Guo Qiang Tan ◽  
Hui Jun Ren
Keyword(s):  
Thin Films ◽  
Liquid Phase ◽  
Electrostatic Force ◽  
Substrate Surface ◽  
Precursor Solution ◽  
Molar Ratio ◽  
Self Assembled Monolayers ◽  
Complex Ions ◽  
Assembled Monolayers ◽  
Self Assembled

Using (NH4)2TiF6, Bi(NO3)3•5H2O and H3BO3 as raw materials, Bi4Ti3O12 thin films were synthesized with liquid phase self-assembled monolayers on the glass substrate. The different precursor solution concentrations and acid contents had the effects on the physical phase and morphology of Bi4Ti3O12 thin films. The Bi4Ti3O12 thin films were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The results indicate that the precursor solution with 10.0 mmol/L concentration was prepared by 3:4:9 molar ratio of (NH4)2TiF6: Bi(NO3)3•5H2O: H3BO3 and 6.0 ml acid content, depositing at 50°C for 20h, and heat treating at 590°C for 2h. The as-prepared thin films are well-crystal. The surface is even and dense. The formation mechanism of the Bi4Ti3O12 thin films is as follows: [TiF6-n(OH)n]2- complex ions are formed in the (NH4)2TiF6 aqueous solution. Then H3BO3 continually consumed F- ions of the solution, which made the amounts of [TiF6-n(OH)n]2- ions increase gradually. Under the induction of the electrostatic force, Bi3+ ions and [TiF6-n(OH)n]2- ions would grow naturally on the substrate surface in the form of Bi2[TiF6-n(OH)n]3 or Bi2[TiF6-nOm/2(OH)n-m]3. The samples lost the bound water after the heat treatment and finally the Bi4Ti3O12 thin films with pure phase were obtained.

scholarly journals Differences in ITO Surfaces According to the Formation of Aromatic Rings and Aliphatic Self-Assembled Monolayers for Organic Light-Emitting Diode Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2520
Author(s):  
Myung-Gyun Baek ◽  
Sang-Geon Park
Keyword(s):  
Contact Angle ◽  
Work Function ◽  
Light Emitting Diode ◽  
Substrate Surface ◽  
Self Assembled Monolayers ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Assembled Monolayers ◽  
Self Assembled

In this study, we investigated the effects on the characteristic changes in OLED devices of using self-assembled monolayers with different functional groups as the hole injection layer, resulting in changes in their performance. Thus, we confirmed that it is possible to control the wetting properties, surface roughness, and work function of the indium tin oxide (ITO) surface by introducing self-assembled monolayers (SAMs). The contact angle measurements confirmed that the substrate surface contact angle tended to increase with SAM deposition. In addition, AFM measurements confirmed that the substrate surface roughness tended to decrease when SAM was deposited on the surface. Finally, it was confirmed through the work function measurement results that the work function increased when the ITO surface was modified by SAM. Furthermore, compared to OLEDs using only the ITO anode, the SAM-modified device showed a higher current density (359.68 A/cm2), improved brightness (76.8 cd/cm2), and a smaller turn-on voltage (7 V). This approach provides a simple route for fabricating organic light-emitting diode applications.

scholarly journals Photochemical reaction on graphene surfaces controlled by substrate-surface modification with polar self-assembled monolayers

2020 ◽  
Vol 22 (3) ◽  
pp. 1268-1275 ◽  
Author(s):  
Ryo Nouchi ◽  
Kei-ichiro Ikeda
Keyword(s):  
Surface Modification ◽  
Charge Carrier ◽  
Chemical Reaction ◽  
Photochemical Reaction ◽  
Substrate Surface ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

Molecular gating, a methodology that can alter charge carrier concentrations, is exploited to control a chemical reaction on graphene surfaces.

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