The characterization of thin films based on chitosan and tannic acid mixture for potential applications as wound dressings

AbstractMaterials based on carbohydrate polymers may be used for biomedical application. However, materials based on natural polymers have weak physicochemical properties. Thereby, there is a challenge to improve their properties without initiation of toxicity. The alternative method compared to toxic chemical agents’ addition is the use of metal complexation method. In this study, chitosan/tannic acid mixtures modified by Fe(III) complexation are proposed and tested for potential applications as wound dressings. Thereby, surface properties, blood compatibility as well as platelet adhesion was tested. In addition, the periodontal ligament stromal cells compatibility studies were carried out. The results showed that the iron(III) addition to chitosan/tannic acid mixture improves properties due to a decrease in the surface free energy and exhibited a reduction in the hemolysis rate (below 5%). Moreover, cells cultured on the surface of films with Fe(III) showed higher metabolic activity. The current findings allow for the medical application of the proposed materials as wound dressings.

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The Influence of CBD Parameters on the Energy Gap of ZnS Narcissus-Like Nanostructured Thin Films

Coatings ◽

10.3390/coatings11091131 ◽

2021 ◽

Vol 11 (9) ◽

pp. 1131

Author(s):

Mohammed Hussein Khalil ◽

Raghad Y. Mohammed ◽

Mohammed Aziz Ibrahem

Keyword(s):

Thin Films ◽

Energy Gap ◽

Low Cost ◽

High Yield ◽

Nanostructured Films ◽

Nanostructured Thin Films ◽

Deposition Parameters ◽

Potential Applications ◽

Preparation Techniques

Recently, the efficient preparation techniques of zinc sulfide (ZnS) nanostructured films have drawn great attention due to their potential applications in optoelectronics. In this study, the low-cost and high-yield chemical bath deposition (CBD) technique was used to deposit ZnS nanostructured thin films. The effect of various deposition parameters such as time, pH, precursor concentration, and temperature on the morphology and energy bandgap (Eg) of the prepared thin films were investigated. The characterization of the prepared thin films revealed the formation of polycrystalline ZnS with Narcissus-like nanostructures. Moreover, the optical characterization showed inverse proportionality between both the transmission and Eg of the nanostructured thin films and the variation of the deposition parameters. A range of different Eg values between 3.92 eV with 20% transmission and 4.06 eV with 80% transmission was obtained. Tuning the Eg values and transmission of the prepared nanostructured films by manipulating the deposition parameters of such an efficient technique could lead to applications in optoelectronics such as solar cells and detectors.

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Synthesis and Characterization of Copper-Iron Nitride Thin Films

MRS Advances ◽

10.1557/adv.2015.13 ◽

2015 ◽

Vol 1 (3) ◽

pp. 203-208 ◽

Cited By ~ 3

Author(s):

Hrishikesh Kamat ◽

Xingwu Wang ◽

James Parry ◽

Yueling Qin ◽

Hao Zeng

Keyword(s):

Thin Films ◽

Magnetic Properties ◽

Iron Nitride ◽

X Ray Diffraction ◽

Copper Nitride ◽

X Ray ◽

Structure Morphology ◽

Layer Stacking ◽

Potential Applications

ABSTRACTIron nitride thin films have potential applications in the biomedicine and energy. The magnetic properties of these films can be tuned by incorporating copper nitride. In this study, iron copper nitride thin films have been fabricated by magnetron sputtering technique either by co-sputtering iron nitride and copper nitride or by layer stacking of the materials. The structure, morphology and magnetic properties of the films have been studied by scanning electron microscopy, x-ray diffraction, x-ray reflectivity and vibrating sample magnetometry.

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Growth and characterization of aluminum nitride thin films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010008907x ◽

1991 ◽

Vol 49 ◽

pp. 952-953

Author(s):

M. Grant Norton ◽

Paul G. Kotula ◽

C. Barry Carter

Keyword(s):

Thin Films ◽

Aluminum Nitride ◽

Phonon Scattering ◽

Heat Sinks ◽

Oxide Ceramics ◽

Multicomponent Oxide ◽

Crystalline Films ◽

Potential Applications ◽

Defects And Impurities

Pulsed-laser ablation has been widely used for the fabrication of thin films of multicomponent oxide ceramics. More recently the technique has been successfully used to deposit highly oriented thin films of aluminum nitride (AIN). AIN thin films are of interest for a number of potential applications. These applications include heat sinks for high-power microcircuit applications and insulating and passivating layers in semiconductor devices. For all the proposed applications it is important to be able to produce highly oriented, dense crystalline films. It is also important that these films be essentially defect free, as for example, phonon scattering by defects and impurities can severely limit thermal conductivity.

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Development of tannic acid-enriched materials modified by poly(ethylene glycol) for potential applications as wound dressing

Progress in Biomaterials ◽

10.1007/s40204-020-00136-1 ◽

2020 ◽

Vol 9 (3) ◽

pp. 115-123

Author(s):

Beata Kaczmarek ◽

Olha Mazur ◽

Oliwia Miłek ◽

Marta Michalska-Sionkowska ◽

Anna M. Osyczka ◽

...

Keyword(s):

Ethylene Glycol ◽

Tannic Acid ◽

Wound Dressings ◽

Future Application ◽

Mechanical Parameters ◽

Poly Ethylene Glycol ◽

Affect Cell Viability ◽

Marrow Mesenchymal Stem Cells ◽

Potential Applications ◽

Poly Ethylene

Abstract The interests in the biomedical impact of tannic acid (TA) targeting production of various types of biomaterials, such as digital microfluids, chemical sensors, wound dressings, or bioimplants constantly increase. Despite the significant disadvantage of materials obtained from natural-based compounds and their low stability and fragility, therefore, there is an imperative need to improve materials properties by addition of stabilizing formulas. In this study, we performed assessments of thin films over TA proposed as a cross-linker to be used in combination with polymeric matrix based on chitosan (CTS), i.e. CTS/TA at 80:20 or CTS/TA at 50:50 and poly(ethylene glycol) (PEG) at the concentration of 10% or 20%. We evaluated their mechanical parameters as well as the cytotoxicity assay for human bone marrow mesenchymal stem cells, human melanotic melanoma (MNT-1), and human osteosarcoma (Saos-2). The results revealed significant differences in dose-dependent of PEG regarding the maximum tensile strength (σmax) or impact on the metabolic activity of tissue culture plastic. We observed that PEG improved mechanical parameters prominently, decreased the hemolysis rate, and did not affect cell viability negatively. Enclosed data, confirmed also by our previous reports, will undoubtedly pave the path for the future application of tannic acid-based biomaterials to treat wound healing.

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Microwave and THz Metamaterial-Based Devices for Potential Applications in NDE, Chem-Bio Detection and Dielectric Characterization of Complex Oxide Thin Films

Metamaterials - Devices and Applications ◽

10.5772/65951 ◽

2017 ◽

Author(s):

Daniel Shreiber

Keyword(s):

Thin Films ◽

Complex Oxide ◽

Oxide Thin Films ◽

Dielectric Characterization ◽

Potential Applications

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Electron microscopic characterization of diamond thin films and substrates for diamond heteroepitaxial growth

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100154937 ◽

1989 ◽

Vol 47 ◽

pp. 592-593

Author(s):

J.B. Posthill ◽

R.P. Burns ◽

R.A. Rudder ◽

Y.H. Lee ◽

R.J. Markunas ◽

...

Keyword(s):

Thin Films ◽

Wide Band ◽

Deposition Process ◽

Heteroepitaxial Growth ◽

Electron Microscopic ◽

Wide Band Gap ◽

Lattice Matching ◽

Different Types ◽

Diamond Thin Films

Because of diamond’s wide band gap, high thermal conductivity, high breakdown voltage and high radiation resistance, there is a growing interest in developing diamond-based devices for several new and demanding electronic applications. In developing this technology, there are several new challenges to be overcome. Much of our effort has been directed at developing a diamond deposition process that will permit controlled, epitaxial growth. Also, because of cost and size considerations, it is mandatory that a non-native substrate be developed for heteroepitaxial nucleation and growth of diamond thin films. To this end, we are currently investigating the use of Ni single crystals on which different types of epitaxial metals are grown by molecular beam epitaxy (MBE) for lattice matching to diamond as well as surface chemistry modification. This contribution reports briefly on our microscopic observations that are integral to these endeavors.

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