Pulse potential deposition of thick polyvinylpyridine-like film on the surface of titanium nitride

Zeb, Gul; Nguyen-Tri, Phuong; Le, Xuan Tuan

doi:10.1039/c6ra14487j

Cited by 15 publications

(18 citation statements)

References 24 publications

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“…This research is a continuous works focused on polymers and multifunctional composites [67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86]. The main findings of this work were as follows:…”

Section: Discussionmentioning

confidence: 99%

Antibacterial Activity of TiO2- and ZnO-Decorated with Silver Nanoparticles

Nguyen¹,

Vu²,

Nguyen³

et al. 2019

J. Compos. Sci.

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This work emphasizes the use of the silver decorative method to enhance the antibacterial activity of TiO2 and ZnO nanoparticles. These silver-decorated nanoparticles (hybrid nanoparticles) were synthesized using sodium borohydride as a reducing agent, with the weight ratio of Ag precursors/oxide nanoparticles = 1:30. The morphology and optical properties of these hybrid nanoparticles were investigated using transmission electron microscopy (TEM), X-ray diffraction (XRD) patterns, and UV-Vis spectroscopy. The agar-well diffusion method was used to evaluate their antibacterial activity against both Staphylococcus aureus and Escherichia coli bacteria, with or without light irradiation. The TEM images indicated clearly that silver nanoparticles (AgNPs, 5–10 nm) were well deposited on the surface of nano-TiO2 particles (30–60 nm). In addition to this, bigger AgNPs (<20 nm) were dispersed on the surface of nano-ZnO particles (30–50 nm). XRD patterns confirmed the presence of AgNPs in both Ag-decorated TiO2 and Ag-decorated ZnO nanoparticles. UV-Vis spectra confirmed that the hybridization of Ag and oxide nanoparticles led to a shift in the absorption edge of oxide nanoparticles to the lower energy region (visible region). The antibacterial tests indicated that both oxide pure nanoparticles did not exhibit inhibitory effects against bacteria, with or without light irradiation. However, the presence of AgNPs in their hybrids, even at low content (<40 mg/mL), leads to a good antibacterial activity, and higher inhibition zones under light irradiation as compared to those in dark were observed.

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Section: Discussionmentioning

confidence: 99%

Antibacterial Activity of TiO2- and ZnO-Decorated with Silver Nanoparticles

Nguyen¹,

Vu²,

Nguyen³

et al. 2019

J. Compos. Sci.

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“…The N 1s peak of pristine TiN (inset of 2b) can be fitted with components positioned at 396.0, 397.0, and 399.0 eV related to TiN, TiO x N y , and NH 2 species, respectively. [2a,13] The attenuation of TiN and TiO x N y peaks, and at the same time, intensification of NH 2 peak upon grafting suggest the success in grafting layer containing amine groups. Similarly, the peak positioned at 400.5 eV suggests the presence of azo bridges.…”

Section: Methodsmentioning

confidence: 99%

“…The grafting of thick organic layer with similar thickness on three different substrates under same experimental conditions is useful for many applications, such as fabricating MEMS . This work involves three of the most commonly used structural materials in MEMS fabrication: p‐doped Si (semiconductor), TiN (ceramic, barrier toward metal diffusion), and Cu (metal, conductor).…”

Section: Methodsmentioning

confidence: 99%

An Application of Diazonium‐Induced Anchoring Process in the Fabrication of Micro‐Electromechanical Systems

Zeb

Zafar

2017

Adv Materials Technologies

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International audienceIn situ generation of diazonium cations and their subsequent reduction and grafting is a versatile technique to modify a variety of substrates. In the absence of a conducting substrate, the grafting of aminophenylene layer can be achieved with assistance of a reducing agent (diazonium-induced anchoring process—DIAP). Here, a systematic investigation of the possible effect of the type substrate on the thickness of aminophenyl layer is carried out using Fe powder reducing agent. The study is carried out on three different substrates: p-doped Si, TiN, and Cu films and concludes that the film-growth mechanism is independent of the type of substrate. This work is particularly important for many industrial applications, which require unifying a single film deposition process for multiple structural materials. The first results obtained with mechanical Si test structures clearly show that surface amination at room temperature, in open air, and aqueous medium using DIAP can be easily integrated into the fabrication of microelectromechanical systems and, therefore, can potentially replace the currently industrialized organic-based silanization process

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“…The atomic force microscope (AFM) has been widely used for the study of nanocomposites and polymeric materials with nanoscale spatial resolution [29][30][31][32][33][34][35][36]. AFM-IR allows surface mapping with a resolution of several tens of nanometers.…”

Section: Introductionmentioning

confidence: 99%

Biological Activity and Nanostructuration of Fe3O4-Ag/High Density Polyethylene Nanocomposites

Nguyen-Tri

Nguyen

2019

J. Compos. Sci.

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We report here the synthesis of uniform nanospheres-like silver nanoparticles (Ag NPs, 5–10 nm) and the dumbbell-like Fe3O4-Ag hybrid nanoparticles (FeAg NPs, 8–16 nm) by the use of a seeding growth method in the presence of oleic acid (OA)/oleylamine (OLA) as surfactants. The antibacterial activity of pure nanoparticles and nanocomposites by monitoring the bacterial lag–log growth has been investigated. The electron transfer from Ag NPs to Fe3O4 NPs which enhances the biological of silver nanoparticles has been proven by nanoscale Raman spectroscopy. The lamellae structure in the spherulite of FeAg NPs/High Density Polyethylene (HDPE) nanocomposites seems to play the key role in the antibacterial activity of nanocomposites, which has been proven by nanoscale AFM-IR. An atomic force microscopy coupled with nanoscale infrared microscopy (AFM-IR) is used to highlight the distribution of nanoparticles on the surface of nanocomposite at the nanoscale. The presence of FeAg NPs in PE nanocomposites has a better antibacterial activity than that reinforced by Ag NPs due to the faster Ag+ release rate from the Fe3O4-Ag hybrid nanoparticles and the ionization of Ag NPs in hybrid nanostructure.

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Pulse potential deposition of thick polyvinylpyridine-like film on the surface of titanium nitride

Cited by 15 publications

References 24 publications

Antibacterial Activity of TiO2- and ZnO-Decorated with Silver Nanoparticles

Antibacterial Activity of TiO2- and ZnO-Decorated with Silver Nanoparticles

An Application of Diazonium‐Induced Anchoring Process in the Fabrication of Micro‐Electromechanical Systems

Biological Activity and Nanostructuration of Fe3O4-Ag/High Density Polyethylene Nanocomposites

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