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Fabrication of hierarchical sapphire nanostructures using ultrafast laser induced morphology change.
Nanotechnology
January 2025
Walker Department of Mechanical Engineering, The University of Texas at Austin, 204 E. Dean Keeton St., Austin, Texas, 78712-1139, UNITED STATES.
Sapphire is an attractive material in photonic, optoelectronic, and transparent ceramic applications that stand to benefit from surface functionalization effects stemming from micro/nanostructures. Here we investigate the use of ultrafast lasers for fabricating nanostructures in sapphire by exploring the relationship between irradiation parameters, morphology change, and selective etching. In this approach an ultrafast laser pulse is focused on the sapphire substrate to change the crystalline morphology to amorphous or polycrystalline, which is characterized by examining different vibrational modes using Raman spectroscopy.
View Article and Find Full Text PDFNeural plasticity in early potters: Shape analysis and TMS-EEG co-registration trace the rise of a new motor skill.
PLoS One
January 2025
Department of Neuroscience, University of Padova, Padua, Italy.
In this study, we explored the biocultural mechanisms underlying ancient craft behaviours. Archaeological methods were integrated with neuroscience techniques to explore the impact on neuroplasticity resulting from the introduction of early pottery techniques. The advent of ceramic marked a profound change in the economy and socio-cultural dynamics of past societies.
View Article and Find Full Text PDFBioceramics for Guided Bone Regeneration: A Multicenter Randomized Controlled Trial.
Clin Implant Dent Relat Res
February 2025
State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China.
Objectives: To compare the clinical effectiveness of a novel bioceramic (BC) with a control xenograft (BO) for guided bone regeneration (GBR) performed simultaneously with implant placement.
Materials And Methods: This clinical study enrolled patients with insufficient bone volume who required GBR during implant placement to increase bone width using either BC or BO. Outcome measures included a dimensional reduction in buccal bone thickness measured by cone beam computed tomography performed immediately post-surgery and at 6 months postoperatively (ΔHBBT), soft tissue healing at 14 days, 1 month, and 6 months postoperatively, and complications rates.
Perceptibility and Acceptability Thresholds for Color Differences in Ceramic Shade Tabs: A Comparison Between Dentists and Patients.
J Clin Exp Dent
December 2024
D.D.S., M.S., Ph.D. Clinical Associate Professor. Department of Restorative Dental Sciences, University of Florida, College of Dentistry, 1395 Center Drive, College of Dentistry, Gainesville, FL, United States.
Background: The aim of this study was to evaluate the 50%:50% perceptibility thresholds (PT) and acceptability thresholds (AT) for color differences in ceramic shade tabs observed by dentists and patients using CIEDE2000 color difference formula.
Material And Methods: Twenty-two combinations of ceramic shade tabs from the VITA 3D Master shade guide were assembled to be used for the visual comparison analyses. The color difference between each shade tab pair was numerically determined by spectrophotometry using the VITA EasyShade V, and calculated using the CIEDE2000 formula (ΔE00).
Enhanced energy storage in relaxor (1-x)BiNaTiO-xBaZrTiO thin films by morphotropic phase boundary engineering.
Commun Mater
January 2025
Silicon Austria Labs GmbH, Graz, Austria.
Perovskites at the crossover between ferroelectric and relaxor are often used to realize dielectric capacitors with high energy and power density and simultaneously good efficiency. Lead-free BiNaTiO is gaining importance in showing an alternative to lead-based devices. Here we show that ()BiNaTiO - BaZr Ti O (best: 0.
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