Multi-Walled Carbon Nanotube Coating on Alkali Treated TiO2 Nanotubes Surface for Improvement of Biocompatibility

Park, Jung-Eun; Jang, Yong-Seok; Bae, Tae‐Sung

doi:10.3390/coatings8050159

Cited by 8 publications

(6 citation statements)

References 36 publications

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“…Pure SWCNTs, as well as MWCNTs coatings, have been obtained [31][32][33], but the composite or hybrid layers are even more extensively developed as, e.g., CNTs-HAp [13,22,23,[34][35][36][37] or CNTs-graphene oxide [38]. Most frequently, the electrophoretic deposition (EPD) [12,14,[39][40][41], electrocathodic deposition [15,16,20] or chemical vapor deposition (CVD) processes [42] are applied to prepare CNTs coating.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Properties of the Hybrid and Bilayer MWCNTs—Hydroxyapatite Coatings on Ti Alloy

et al. 2019

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Carbon nanotubes are proposed for reinforcement of the hydroxyapatite coatings to improve their adhesion, resistance to mechanical loads, biocompatibility, bioactivity, corrosion resistance, and antibacterial protection. So far, research has shown that all these properties are highly susceptible to the composition and microstructure of coatings. The present research is aimed at studies of multi-wall carbon nanotubes in three different combinations: multi-wall carbon nanotubes layer, bilayer coating composed of multi-wall carbon nanotubes deposited on nanohydroxyapatite deposit, and hybrid coating comprised of simultaneously deposited nanohydroxyapatite, multi-wall carbon nanotubes, nanosilver, and nanocopper. The electrophoretic deposition method was applied for the fabrication of the coatings. Atomic force microscopy, scanning electron microscopy and X-ray electron diffraction spectroscopy, and measurements of water contact angle were applied to study the chemical and phase composition, roughness, adhesion strength and wettability of the coatings. The results show that the pure multi-wall carbon nanotubes layer possesses the best adhesion strength, mechanical properties, and biocompatibility. Such behavior may be attributed to the applied deposition method, resulting in the high hardness of the coating and high adhesion of carbon nanotubes to the substrate. On the other hand, bilayer coating, and hybrid coating demonstrated insufficient properties, which could be the reason for the presence of soft porous hydroxyapatite and some agglomerates of nanometals in prepared coatings.

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Section: Introductionmentioning

confidence: 99%

Comparison of Properties of the Hybrid and Bilayer MWCNTs—Hydroxyapatite Coatings on Ti Alloy

et al. 2019

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“…Hussain et al [18] utilized the exponentially stretching sheet to scrutinize the flow of Jeffrey nanofluid with radiation effects. Some recent explorations highlighting various fluid flows past stretched surfaces with coatings can be found in references [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Impact of Nonlinear Thermal Radiation and Entropy Optimization Coatings with Hybrid Nanoliquid Flow Past a Curved Stretched Surface

Ramzan

Ahmad

et al. 2018

Coatings

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The present investigation addresses the flow of hybrid (nickel–zinc ferrite and ethylene glycol) nanoliquid with entropy optimization and nonlinear thermal radiation coatings past a curved stretching surface. Analysis was carried out in the presence of magnetohydrodynamic, heat generation/absorption, and convective heat and mass flux conditions. Solution of the modeled problem was attained numerically using MATLAB built-in function bvp4c. Impacts of prominent parameters on betrothed distributions were depicted through graphs and were well supported by requisite discussions. Numerically calculated values of Sherwood number were established in a tabulated form and were scrutinized critically. An excellent concurrence was achieved when results of the presented model were compared with previously published result; hence, dependable results are being presented. It was observed that concentration field diminished with increasing values of curvature parameter, though the opposite trend was noticed for velocity and temperature distributions. Further, it was detected that Nusselt number decreased with augmented values of radiation and curvature parameters.

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“…The peaks related to sodiumhydroxide encapsulated on TiO 2 nanostructures were absent in XRD analysis (in section 3.2) due to the amorphous nature of the sodium titanate layer [16]. When the soaking time was exceeded above 30 min, it leads to the excess formation of sodium titanate over the surface, which corrodes and disrupts the nanotubular structure and thus degrades their electrochemical performance [14]. Hence, T-NTs with 30 min soaking interval was chosen for the performing the treatment.…”

Section: Dual Treatment Of T-nts Arraysmentioning

confidence: 99%

“…Alkali (here NaOH) treatment techniques have shown very appealing results in improving the performance of T-NTs. It exhibits superior electronic contact and improved chemical stability for the majority of biomedical applications [14,15]. It has been shown that NaOH treatment helps in electron transport, reduces recombination of electron-hole pairs, and improved conductivity for photoelectrochemical sensing applications [16].…”

Section: Introductionmentioning

confidence: 99%

Influence of laser and alkali treatment on an Ag/TiO₂ nanotube based dopamine sensor

Sharma¹,

Sidhartha²,

Chappanda³

2021

Nanotechnology

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Herein, TiO2 nanotubes (T-NTs) arrays were subjected to two types of treatment followed by a simple metal deposition technique to significantly enhance the performances of T-NTs based electrochemical sensing of dopamine. The first type of treatment was done by soaking T-NTs in sodium hydroxide solution for an optimal time to enhance the conductivity and charge carrier density. The second type of treatment employed was laser irradiation, which induces crystallinity disorder and forms rutile TiO2, promoting active analyte adsorption sites. Afterward, silver (Ag) was electro-deposited on the T-NTs as a dopamine sensing catalyst to form T-NTs/Ag nanohybrids. The dual-treated T-NTs based sensor showed 3-fold enhancement in sensitivity (from 8.2 μA mM−1 cm−2 to 32 μA mM−1 cm−2), reduced charge transfer resistance (from 38 × 10–6 Ω to 0.7 × 10–6 Ω), above 2 order higher donor charge density (from 3.58 × 1018 cm−3 to 1.41 × 1021 cm−3), and reduced limit of detection (from 32.3 μM to 2.8 μM) in comparison to plain T-NTs based sensor. In addition, the sensitivity reported here is significantly higher than most of the previously reported TiO2 based dopamine sensors. Perspective-wise, the dual treatment approach is a promising technique and is highly desirable for enhancing the performances of T-NTs and other nanomaterial based electrochemical sensors.

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Multi-Walled Carbon Nanotube Coating on Alkali Treated TiO2 Nanotubes Surface for Improvement of Biocompatibility

Cited by 8 publications

References 36 publications

Comparison of Properties of the Hybrid and Bilayer MWCNTs—Hydroxyapatite Coatings on Ti Alloy

Comparison of Properties of the Hybrid and Bilayer MWCNTs—Hydroxyapatite Coatings on Ti Alloy

Impact of Nonlinear Thermal Radiation and Entropy Optimization Coatings with Hybrid Nanoliquid Flow Past a Curved Stretched Surface

Influence of laser and alkali treatment on an Ag/TiO₂ nanotube based dopamine sensor

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Multi-Walled Carbon Nanotube Coating on Alkali Treated TiO2 Nanotubes Surface for Improvement of Biocompatibility

Cited by 8 publications

References 36 publications

Comparison of Properties of the Hybrid and Bilayer MWCNTs—Hydroxyapatite Coatings on Ti Alloy

Comparison of Properties of the Hybrid and Bilayer MWCNTs—Hydroxyapatite Coatings on Ti Alloy

Impact of Nonlinear Thermal Radiation and Entropy Optimization Coatings with Hybrid Nanoliquid Flow Past a Curved Stretched Surface

Influence of laser and alkali treatment on an Ag/TiO2 nanotube based dopamine sensor

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Influence of laser and alkali treatment on an Ag/TiO₂ nanotube based dopamine sensor