48 research outputs found
Electrospinning piezoelectric fibers for biocompatible devices
The field of nanotechnology has been gaining great success due to its potential in developing new generations of nanoscale materials with unprecedented properties and enhanced biological responses. This is particularly exciting using nanofibers, as their mechanical and topographic characteristics can approach those found in naturally occurring biological materials. Electrospinning is a key technique to manufacture ultrafine fibers and fiber meshes with multifunctional features, such as piezoelectricity, to be available on a smaller length scale, thus comparable to subcellular scale, which makes their use increasingly appealing for biomedical applications. These include biocompatible fiber-based devices as smart scaffolds, biosensors, energy harvesters, and nanogenerators for the human body. This paper provides a comprehensive review of current studies focused on the fabrication of ultrafine polymeric and ceramic piezoelectric fibers specifically designed for, or with the potential to be translated toward, biomedical applications. It provides an applicative and technical overview of the biocompatible piezoelectric fibers, with actual and potential applications, an understanding of the electrospinning process, and the properties of nanostructured fibrous materials, including the available modeling approaches. Ultimately, this review aims at enabling a future vision on the impact of these nanomaterials as stimuli-responsive devices in the human body
An Attempt to Produce the Implanted Na Source for Positron Spectrometry
Preliminary results of Na implantation into the metal foils in order to produce the positron source for annihilation experiments are presented
Comparison of the work of Reskvik, Smith, PI regulators in the circuit of maintaining the temperature in a fluidized-bed furnace
Theoretical calculation of spin-spin interaction in the NMR spectra of a peptide fragment
Surface modified hydroxyapatites with various functionalized nanostructures: Computational studies of the vacancies in HAp
Spectrophotometric method for measuring the groove depth of calibration reflection gratings
Formation of Wear- and Corrosion-Resistant Ceramic Coatings by Combined Technologies of Spraying and Micro-Arc Oxidation
A Computational Study of the Properties and Surface Interactions of Hydroxyapatite
Hydroxyapatite (HAP, Ca-10(PO4)(6)(OH)(2)) was studied from first principles approaches using the local density approximation (LDA) method in combination with various quantum-chemical (QM) and molecular mechanical (MM) methods from HypemChem 7.5/8.0. The data then were used for studies of HAP structures, and the interactions of HAP clusters with ionic species such as citrates. Computed data show that HAP can co-exist in different phases at room temperature, as both hexagonal and monoclinic. Special interest is connected with the ordered monoclinic structure, which could reveal piezoelectric properties. Obtained data on HAP interactions with citrates show the formation of differing HAP nanostructure forms, depending upon the concentration of citrate present