Chemical bath deposition of textured and compact zinc oxide thin films on vinyl-terminated polystyrene brushes

Blumenstein, Nina J.; Hofmeister, Caroline; Lindemann, Peter; Huang, Cheng; Baier, Johannes; Leineweber, Andreas; Walheim, Stefan; Wöll, Christof; Schimmel, Thomas

doi:10.3762/bjnano.7.12

Cited by 7 publications

(8 citation statements)

References 42 publications

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“…There are many examples of descriptions of this process indicating different reaction steps, which are based on the equilibrium between the precipitation and dissolution of zinc oxide/hydroxide [ 15 ]. It is complicated because every factor of procedure, such as the kind and amount of reagents [ 16 , 17 ], time [ 18 ], and the temperature [ 12 ] of the reaction, has a significant influence on the obtained particles. It could be concluded that a smaller concentration of zinc nitrate and HMT, resulted in less zinc oxide (hydroxide), with a smaller average number of particles, being deposited on the surface.…”

Section: Introductionmentioning

confidence: 99%

The Relationship between the Mechanism of Zinc Oxide Crystallization and Its Antimicrobial Properties for the Surface Modification of Surgical Meshes

et al. 2017

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Surgical meshes were modified with zinc oxide (ZnO) using a chemical bath deposition method (CBD) at 50 °C, 70 °C, or 90 °C, in order to biologically activate them. Scanning electron microscopy (SEM), mass changes, and X-ray diffraction measurements revealed that at low temperatures Zn(OH)2 was formed, and that this was converted into ZnO with a temperature increase. The antimicrobial activity without light stimulation of the ZnO modified Mersilene™ meshes was related to the species of microorganism, the incubation time, and the conditions of the experiment. Generally, cocci (S. aureus, S. epidermidis) and yeast (C. albicans) were more sensitive than Gram-negative rods (E. coli). The differences in sensitivity of the studied microorganisms to ZnO were discussed. The most active sample was that obtained at 90 °C. The mechanism of antimicrobial action of ZnO was determined by various techniques, such as zeta potential analysis, electron paramagnetic resonance (EPR) spectroscopy, SEM studies, and measurements of Zn(II) and reactive oxygen species (ROS) concentration. Our results confirmed that the generation of free radicals was crucial, which occurs on the surface of crystalline ZnO.

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Section: Introductionmentioning

confidence: 99%

The Relationship between the Mechanism of Zinc Oxide Crystallization and Its Antimicrobial Properties for the Surface Modification of Surgical Meshes

et al. 2017

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“…Due to these varied applications, several methods including thin films and polymeric approaches have been employed to deposit ZnO. Some of the thin film methods used include; chemical vapour deposition [12,13,14], chemical bath deposition [15], laser deposition [16,17], spray pyrolysis [18], magnetic sputtering [19], thermal oxidation [20], molecular beam epitaxy [21] and electrospraying [8]. ZnO fibre on the other hand has been synthesized using template [22] and electrospinning [23,24] methods.…”

Section: Introductionmentioning

confidence: 99%

Determination of optical parameters of zinc oxide nanofibre deposited by electrospinning technique

Bolarinwa

Onuu

Fasasi

et al. 2017

Journal of Taibah University for Science

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Electrospun ZnO was deposited on a glass substrate from zinc acetate dihydrate (Zn(CH 3 COO) 2 .2H 2 O) with polyvinyl acetate (PVAc) polymer dissolved in N, N, dimethyl formamide (DMF) and annealed in the presence of oxygen until organic molecules were decomposed. The resultant fibre was characterized using scanning electron microscope with energy dispersive spectrophotometry (SEMEDS), Fourier transform infrared (FTIR), and Rutherford backscattering spectroscopy (RBS). SEMEDS and FTIR exhibited a total decomposition of the organic precursor. The mean fibre width was found to be 260 nm, and fibre thickness was measured at 460 nm. XRD patterns indicate that ZnO was corundum with the hexagonal wurtzite structure. The crystallite size was determined by the Debye formula to be 54 nm. The optical analysis indicated that the percentage transmittance increased after calcination. The material band gap for this electrospun ZnO fibre was found to be 3.28 eV. The material optical parameters such as dispersion energy, average oscillator strength, and single oscillator strength were also calculated. The optical conductivity and dielectric plot demonstrated that the material conductivity and dielectric properties increase with increasing photon energy and increase sharply around the material energy bandgap. The Urbach tail analysis of the materials shows that they obey the Urbach rule. Therefore, the n-type electrospun ZnO fibre high refractive index is attributable to the presence of excess oxygen.

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“…2 ). Investigation of the deposition of ZnO films on the bare substrate showed that without template only island growth occurs [ 25 ]. In comparison, the ZnO films on the highly negatively charged PEL ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, organic templates are used to modify the surface of the substrate. Especially self-assembled monolayers (SAMs) [ 23 – 24 ], thin polymer brushes [ 25 ] or polyelectrolyte multilayers (PEL) [ 26 ] were successfully applied for the deposition of ZnO thin films. With these molecules, a multitude of different functionalities are available, e.g., amino-, carboxylate or sulfonate groups for hydrophilic or alkyl groups and fluorine atoms for hydrophobic modifications.…”

Section: Introductionmentioning

confidence: 99%

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Template-controlled piezoactivity of ZnO thin films grown via a bioinspired approach

Blumenstein

Streb

Walheim

et al. 2017

Beilstein J. Nanotechnol.

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Biomaterials are used as model systems for the deposition of functional inorganic materials under mild reaction conditions where organic templates direct the deposition process. In this study, this principle was adapted for the formation of piezoelectric ZnO thin films. The influence of two different organic templates (namely, a carboxylate-terminated self-assembled monolayer and a sulfonate-terminated polyelectrolyte multilayer) on the deposition and therefore on the piezoelectric performance was investigated. While the low negative charge of the COOH-SAM is not able to support oriented attachment of the particles, the strongly negatively charged sulfonated polyelectrolyte leads to texturing of the ZnO film. This texture enables a piezoelectric performance of the material which was measured by piezoresponse force microscopy. This study shows that it is possible to tune the piezoelectric properties of ZnO by applying templates with different functionalities.

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Chemical bath deposition of textured and compact zinc oxide thin films on vinyl-terminated polystyrene brushes

Cited by 7 publications

References 42 publications

The Relationship between the Mechanism of Zinc Oxide Crystallization and Its Antimicrobial Properties for the Surface Modification of Surgical Meshes

The Relationship between the Mechanism of Zinc Oxide Crystallization and Its Antimicrobial Properties for the Surface Modification of Surgical Meshes

Determination of optical parameters of zinc oxide nanofibre deposited by electrospinning technique

Template-controlled piezoactivity of ZnO thin films grown via a bioinspired approach

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