Principles of materials science

Horwood, Andrew; Chockalingam, Nachiappan

doi:10.1016/b978-0-323-85212-8.00002-x

Cited by 2 publications

(1 citation statement)

References 153 publications

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“…A typical hysteresis could be observed from each compressive strain cycle (Figure 3c), revealing the viscoelastic behavior of the stents. The hysteresis loops slightly moved to the larger strain side as the strain rate and amplitude increased, suggesting a possible strain softening phenomenon 28 of the structure at large displacements. At a lower strain range of 5−20%/min, the stent showed a similar modulus of 39.9 kPa at different strain rates.…”

Section: Resultsmentioning

confidence: 95%

3D-Printed Piezoelectric Stents for Electricity Generation Driven by Pressure Fluctuation

Pan,

Sui,

Silva-Pedraza

et al. 2024

ACS Appl. Mater. Interfaces

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Vascular stenting is a common procedure used to treat diseased blood vessels by opening the narrowed vessel lumen and restoring blood flow to ischemic tissues in the heart and other organs. In this work, we report a novel piezoelectric stent featuring a zigzag shape fabricated by fused deposition modeling three-dimensional (3D) printing with a built-in electric field. The piezoelectric composite was made of potassium sodium niobite microparticles and poly(vinylidene fluoride-co-hexafluoropropylene), complementing each other with good piezoelectric performance and mechanical resilience. The in situ poling yielded an appreciable piezoelectricity (d 33 ∼ 4.2 pC N– 1) of the as-printed stents. In vitro testing revealed that materials are nontoxic to vascular cells and have low thrombotic potential. Under stimulated blood pressure fluctuation, the as-printed piezoelectric stent was able to generate peak-to-peak voltage from 0.07 to 0.15 V corresponding to pressure changes from 20 to 120 Psi, giving a sensitivity of 7.02 × 10–4 V Psi–1. Biocompatible piezoelectric stents bring potential opportunities for the real-time monitoring of blood vessels or enabling therapeutic functions.

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Section: Resultsmentioning

confidence: 95%

3D-Printed Piezoelectric Stents for Electricity Generation Driven by Pressure Fluctuation

Pan,

Sui,

Silva-Pedraza

et al. 2024

ACS Appl. Mater. Interfaces

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Intrinsic Room-Temperature Ferromagnetism in New Halide Perovskite AgCrX₃ (X: F, Cl, Br, I) Using Ab Initio and Monte Carlo Simulations

Ahmad,

Rasool,

Abdul

et al. 2024

ACS Omega

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Herein, we present a detailed comparative study of the structural, elastic, electronic, and magnetic properties of a series of new halide perovskite AgCrX 3 (X: F, Cl, Br, I) crystal structures using density functional theory, mean-field theory (MFT), and quantum Monte Carlo (MC) simulations. As demonstrated by the negative formation energy and Born−Huang stability criteria, the suggested perovskite compounds show potential stability in the cubic crystal structure. The materials are ductile because the Pugh's ratio is greater than 1.75, and the Cauchy pressure (C 12 − C 44 ) is positive. The ground state magnetic moments of the compound were calculated as 3.70, 3.91, 3.92, and 3.91 μ B for AgCrF 3 , AgCrCl 3 , AgCrBr 3 , and AgCrI 3 , respectively. The GGA + SOC computed spin-polarized electronic structures reveal ferromagnetism and confirm the metallic character in all of these compounds under consideration. These characteristics are robust under a ±3% strained lattice constant. Using relativistic pseudopotentials, the total energy is calculated, which yields that the single ion anisotropy is 0.004 meV and the z-axis is the hard-axis in the series of AgCrX 3 (X: F, Cl, Br, and I) compounds. Further, to explore room-temperature intrinsic ferromagnetism, we considered ferromagnetic and antiferromagnetic interactions of the magnetic ions in the compounds by considering a supercell with 2 × 2 × 2 dimensions. The transition temperature is estimated by two models, namely, MFT and MC simulations. The calculated Curie temperatures using MC simulations are 518.35, 624.30, 517.94, and 497.28 K, with ±5% error for AgCrF 3 , AgCrCl 3 , AgCrBr 3 , and AgCrI 3 compounds, respectively. Our results suggest that halide perovskite AgCrX 3 compounds are promising materials for spintronic nanodevices at room temperature and provide new recommendations. For the first time, we report results for novel halide perovskite compounds based on Ag and Cr atoms.

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Principles of materials science

Cited by 2 publications

References 153 publications

3D-Printed Piezoelectric Stents for Electricity Generation Driven by Pressure Fluctuation

3D-Printed Piezoelectric Stents for Electricity Generation Driven by Pressure Fluctuation

Intrinsic Room-Temperature Ferromagnetism in New Halide Perovskite AgCrX₃ (X: F, Cl, Br, I) Using Ab Initio and Monte Carlo Simulations

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Principles of materials science

Cited by 2 publications

References 153 publications

3D-Printed Piezoelectric Stents for Electricity Generation Driven by Pressure Fluctuation

3D-Printed Piezoelectric Stents for Electricity Generation Driven by Pressure Fluctuation

Intrinsic Room-Temperature Ferromagnetism in New Halide Perovskite AgCrX3 (X: F, Cl, Br, I) Using Ab Initio and Monte Carlo Simulations

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Product

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Intrinsic Room-Temperature Ferromagnetism in New Halide Perovskite AgCrX₃ (X: F, Cl, Br, I) Using Ab Initio and Monte Carlo Simulations