Results 241 to 250 of about 1,137,364 (312)

THz‐Driven Coherent Phonon Fingerprints of Hidden Symmetry Breaking in 2D Layered Hybrid Perovskites

open access: yesAdvanced Materials, EarlyView.
Intense THz pulses are employed to drive coherent phonons in 2D Ruddlesden‐Popper hybrid metal‐halide perovskites (HOIPs) from the (PEA)2(MA)n‐1PbnI3n+1 family, revealing mode‐selective spectroscopic signatures of inversion symmetry breaking in those nominally centrosymmetric materials. These findings provide a handle to decode nonlinear phonon driving
Joanna M. Urban   +14 more
wiley   +1 more source

Tunable and Persistent Macroscopic Polarization in Nominally Centrosymmetric Defective Oxides

open access: yesAdvanced Materials, EarlyView.
This work introduces an approach to defect‐mediated symmetry breaking and built‐in polarization in nominally centrosymmetric defective oxides, Gd‐doped CeO2‐δ films, by controlling macroscopic charge asymmetry. Electric field‐driven asymmetric redistribution of oxygen vacancies induces a switchable, stable polarization, leading to a notable, persistent
Dae‐Sung Park   +10 more
wiley   +1 more source

Bioprinted Constructs in the Regulatory Landscape: Current State and Future Perspectives

open access: yesAdvanced Materials, EarlyView.
Bioprinting has rapidly emerged as a transformative technology in biomedical research, offering unprecedented potential to replicate complex tissues. Despite its promise, clinical translation remains limited due to regulatory hurdles. This review explores global regulatory frameworks, comparing approaches in the EU, U.S., China, and Australia, and ...
Francesca Perin   +6 more
wiley   +1 more source

Beyond Conventional Cooling: Advanced Micro/Nanostructures for Managing Extreme Heat Flux

open access: yesAdvanced Materials, EarlyView.
This review examines the design, application, and manufacturing of biomimetic or engineered micro/nanostructures for managing high heat‐flux in multi‐level electronics by enhancing conductive, convective, phase‐changing, and radiative heat transfer mechanisms, highlighting their potential for efficient, targeted thermal management, and future prospects.
Yuankun Zhang   +7 more
wiley   +1 more source

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