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Tungsten (W) films have many applications in the semiconducting industry for sensor technology. Deposition conditions can significantly impact the resulting W films in terms of the phases present (α-BCC or β-A12), microstructural grain orientation (texture), and residual strain. Tilt-A-Whirl methodology has been employed for the evaluation of a W film showing both texture and residual strain. Sin2(ψ) analysis of the film was performed to quantify the strongly tensile in-plane strain (+0.476%) with an estimated in-plane tensile stress of ~1.9 GPa. The 3D dataset was also evaluated qualitatively via 3D visualization. Visualization of 3D texture/strain data poses challenges due to peak broadening resulting from defocusing of the beam at high ψ tilt angles. To address this issue, principal component analysis (PCA) was employed to diagnose, model, and remove the broadening component from the diffraction data. Evaluation of the raw data and subsequent corrected data (after removal of defocusing effects) has been performed through projection of the data into a virtual 3D environment (via CAD2VR software) to qualitatively detect the impact of residual strain on the observed pole figure.
Cement references were reviewed and whole pattern methods were developed for the quantitative phase analysis (QPA) of Type I Portland Cements. A set of control references were established for phase identification and quantitative analysis using laboratory diffractometers. Both RIR and Rietveld whole pattern fitting methods were used in the analyses. A block refined, parameter restricted, Rietveld method produced the best QPA results by comparison with known mixtures. Similar to prior literature findings, care has to be taken because of the severe peak overlap of the major calcium silicate and calcium aluminate phases in Portland cement and the complexity of the chemistry and structures involved. Two of the four major phases identified are doped supercells and the major C3S phase is also disordered.
CVD-coated cemented carbides are widely used for various metal cutting applications. It has been established that the textures of the coating materials especially that of the α-Al2O3 greatly affect the cut performance for some applications. The characterization of the coating texture is thus very important. In this paper, inverse pole figures of α-Al2O3 based on XRD with Bragg Brentano geometry were calculated for several metal cutting inserts available in the market. This method is simple, less time-consuming and can be applied to previously collected data and is compared with that of the EBSD. Despite several differences, IPF maps based on XRD powder diffraction represent the texture of metal cutting inserts.
Biotechnology has the potential to solve some of the biggest problems that contribute to local and global inequalities. Thus, it is imperative to increase the participation of diverse communities in the development, implementation and adoption of biotechnology. Biotechnology has been applied as long as we have domesticated plants and animals, produced cheese, yogurt, bread and alcoholic drinks. Today, it is being used in numerous disciplines including medicine, bioremediation, agriculture, energy and material production. Artists and designers have had a role in challenging research and its societal questions. Education must prepare individuals for a future of complex challenges providing creative problem-solving and critical thinking skill as well as the ability to innovate in a technology-driven world. Furthermore, teacher pedagogies should allow students and teachers to critically debate the political, ethical and social issues from the practice of biotechnology. This question invites a wide range of research contributions in which we identify, evaluate and speculate on the role that multidisciplinary education has on the future of biotech. We invite both experimental works on the latest methodologies in this area but also critique and reflection beyond the ‘hype’ of these, potentially transformative pedagogical approaches.
The 10-item Autism-Spectrum Quotient (AQ10) is a measure of autistic traits used in research and clinical practice. Recently, the AQ10 has garnered critical attention, with research questioning its psychometric properties and clinical cutoff value. To help inform the utility of the measure, we conducted the first network analysis of the AQ10, with a view to gain a better understanding of its individual items. Using a large dataset of 6,595 participants who had completed the AQ10, we found strongest inter-subscale connections between communication, imagination, and socially relevant items. The nodes with greatest centrality concerned theory of mind differences. Together, these findings align with cognitive explanations of autism and provide clues about which AQ10 items show greatest utility for informing autism-related clinical practice.
This chapter focus on describing the science and technology related to the use of UNCD films for fabricating MEMS and NEMS structures suitable for use in various devices for medical applications. Topics discussed include: 1) description of the materials science involved in the integration of UNCD films with dissimilar materials in film form, such as piezoelectric oxides, for development of piezo-actuated UNCD-based MEMS/NEMS, and integration with metal films for contacts, and biological matter (e.g., heart cells) for cell bit-induced mechanical deformation of piezo/UNCD cantilevers to generate power via the converse piezoelectric effect, whereby mechanical deformationof cantilevers is transduced into power generation, via mechanical displacement in opposite directions of + and - ions in the piezoelectric layer, thus voltage generation between two electrode layers sandwiching the piezoelectric layer for a new generation of biomedicalenergy generation devices and biosensors). Piezoelectric/UNCD integrated films-based MEMS/NEMS power generation device can power a new generation of defibrillator/pacemaker, eliminating relatively short live batteries in current devices.
This chapter focus on a description of pathways undertaken to transfer the UNCD film technology from the laboratory into the market, through Original Biomedical Implants (OBI-USA) and OBI-México, founded by O. Auciello and colleagues. Topics discussed in this chapter include: 1) Summary of regulatory pathways in different regions of the worldfor approval of medical devices and prostheses; 2) description of pathway to bring to the market a UNCD-coated microchip (artificial retina) implantable inside the eye to restore partial vision to blind people), 2) description of the process to bring to the market a new generation of long life superior performance UNCD-coated prostheses (artificial hips, knees, dental implants, and more); 3) description of pathway to bring into the market a novel retina reattachment process using combined UNCD-coated magnet outside the eye and injection of super-paramagnetic nanoparticles inside the eye, pushing the retina backon to the inner eye’ layer, when attracted by the magnetic field created by the external magnet.
This chapter focuses on a description of a novel UNCD film-based technology enabling a new generation of Li-ion batteries (LIB) with orders of magnitude longer stable specific capacity vs. charge/discharge cycles and safer performance than current devices, to power a new generation of miniaturized defibrillators/pacemakers to improve the quality of life of people receiving them.The UNCD film technology provides three new key components of the LIB, namely: 1) Electrically conductive Nitrogen atoms-grain boundary incorporated ultrananocrystalline diamond (N-UNCD) films encapsulating natural graphite (NG)/copper composite LIB anodes, providing order of magnitude superior cycle performance and capacity retention than for NG/Cu anodes (the N-UNCD layer suppresses reactions of NG with the electrolyte and the development of insulating solid-electrolyte-interphase (SEI) on the anode, which retards anode conductivity and induces stresses, leading to cracks in the NG particles inducing loss of contact between them); 2) UNCD-coated Si-based membranes with orders of magnitude higher resistance to chemical attack than membranes in current LIBs; and 3) UNCD coatings for the inner walls of battery cases to enable use of less expensive case materials than current ones.
This chapter describes the science and technology to develop extremely biocompatible UNCD coatings for encapsulation of devices to treat the glaucoma condition, related to clogging of natural tubes in the human eye’ trabecular mesh, which continuously drain the eye’ fluid from the inner part to keep the internal eye pressure constant. Clogging of the tubes produce overpressure in the eye, resulting in the destruction of the optical nerve and blindness. Two types of devices are being developed by the authors of this chapter, namely: 1) Hydrophobic (no eye fluid adsorption) UNCD coating on commercial polymer-based drain valves (hydrophilic-eye’ fluid adsorption), to practically eliminate attachment of proteins on hydrophilic polymer surface, thus fibrosis that reduce implant lifetime. 2)The second device consists of a novel metallic multi-hole circular grid, made of Ti, coated with a UNCD film and implanted in the eye’ trabecular region, providing efficient drainage of the eye’ fluid through the many holes existing in the structure. The UNCD-coated grid provides a smaller, less intrusive and more efficient device for treatment of glaucoma than the current commercial much larger valves based on polymers, which exhibit extensive biofouling.
This chapter focus on describing the science and technology related to the use of UNCD films for fabricating microelectromechanical systems (MEMS) and nanoelectromechanical systems (NEMS) structures suitable for use in various devices for medical applications. Topics discussed include: 1) Design and fabrication of UNCD-based micro-turbines for chemical lab on a chip, 2) description of the materials science involved in the integration of UNCD films with dissimilar materials in film form, such as piezoelectric nitrides for development of piezo-actuated UNCD-based MEMS/NEMS, and integration with metal films for contacts, and biological matter (e.g., heart cells) for cell bit-induced mechanical deformation of piezo/UNCD cantilevers to generate power via the converse piezoelectric effect, whereby mechanical deformationof cantilevers is transduced into power generation, via mechanical displacement in opposite directions of + and - ions in the piezoelectric layer, thus voltage generation between two electrode layers sandwiching the piezoelectric layer for a new generation of biomedicalenergy generation devices and biosensors.