Results 61 to 70 of about 34,297 (264)

Unlocking Multi‐Valley Energy Pockets and Interface‐Induced Phonon Filtering in InSb Thermoelectrics by Reaction‐Driven Interface Engineering

Advanced Functional Materials, EarlyView.
InSb, a narrow‐bandgap semiconductor with high carrier mobility, is promising for thermoelectric energy conversion but suffers from high lattice thermal conductivity and strong bipolar conduction. Here, in situ interface engineering using Co2O3 nanoprecursors forms hierarchical CoSbx/In2O3/CoSb3 heterostructures that enhance phonon scattering and ...
Jiwu Xin, Xiao Yang, Xiao‐Lei Shi, Chengyun Xu, Xi Ling, Pengyu Zhang, Jinfeng Dong, Yong Du, Haisheng Chen, Ting Zhang, Zhi‐Gang Chen   +10 more
wiley   +1 more source

A multi-modal microscope for integrated mapping of cellular forces and Brillouin scattering with high resolution

JPhys Photonics
Mechanical forces and stiffness play key roles in the health and development of cells and tissue, but despite the physical connection between these quantities, they cannot be monitored in parallel in most cases.
Andrew T Meek, Franziska Busse, Nils M Kronenberg, San Vinh Dinh, Kim V Berghaus, Jonathan H Booth, Giuliano Scarcelli, Malte C Gather   +7 more
doaj   +1 more source

Spectro-microscopy of single and multi-layer graphene supported by a weakly interacting substrate

, 2008
We report measurements of the electronic structure and surface morphology of exfoliated graphene on an insulating substrate using angle-resolved photoemission and low energy electron diffraction.
A. LOCATELLI, A. MORGANTE, AND R. M. OSGOOD, D. CVETKO, JR, K. R. KNOX, M. A. NI 1O, P. KIM, S. WANG, T. O. MENTES   +9 more
core   +1 more source

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Interference of coherent spin waves in micron-sized ferromagnetic waveguides

, 2011
We present experimental observations of the interference of spin-wave modes propagating in opposite directions in micron-sized NiFe-waveguides. To monitor the local spin-wave intensity distribution and phase of the formed interference pattern, we use ...
Bayer, Bayer, Büttner, Choi, Chumak, Demidov, Demidov, Hermsdoerfer, Hertel, Hillebrands, Kalinikos, Khitun, Le Maho, Lee, Perzlmaier, Schneider, Schneider, Schultheiss, Seo, Stancil, Vlaminck, Vogt   +21 more
core   +1 more source

Unveiling the Role of Curvature in Carbon for Improved Energy Release of Ammonium Perchlorate

Advanced Materials, EarlyView.
High‐curvature carbon materials identified via machine learning and simulation can enhance the heat release and combustion performance of ammonium perchlorate. ABSTRACT The catalytic role of carbon curvature in the thermal decomposition of ammonium perchlorate (AP) remains largely unexplored. To address this gap, this study employs machine learning and
Dan Liu, Keliang Song, Haorui Zhang, Zhipeng Liu, Guansong He, Junru Wang, Wenming Yang, Xu Zhao, Zhijian Yang   +8 more
wiley   +1 more source

Two Distinct Phases of Bilayer Graphene Films on Ru(0001) [PDF]

, 2012
By combining angle-resolved photoemission spectroscopy and scanning tunneling microscopy we reveal the structural and electronic properties of multilayer graphene on Ru(0001). We prove that large ethylene exposure allows to synthesize two distinct phases
Brune, Harald, Calleja, Fabian, Carbone, Carlo, Dubout, Quentin, Frantzeskakis, Emmanouil, Fujii, Jun, Grioni, Marco, Lehnert, Anne, Moras, Paolo, Natterer, Fabian Donat, Pacilé, Daniela, Papagno, Marco, Pons, Stéphane, Rusponi, Stefano, Sheverdyaeva, Polina Makarovna, Topwal, Dinesh, Vobornik, Ivana   +16 more
core   +6 more sources

Strain Engineering of Magnetoresistance and Magnetic Anisotropy in CrSBr

Advanced Materials, EarlyView.
Biaxial compressive strain significantly enhances magnetoresistance and critical saturation fields in thin flakes of the 2D magnet CrSBr, along all three crystallographic axes. First‐principles calculations link these effects to strain‐induced increases in exchange interactions and magnetic anisotropy.
Eudomar Henríquez‐Guerra, Alberto M. Ruiz, Marta Galbiati, Álvaro Cortés‐Flores, Daniel Brown, Esteban Zamora‐Amo, Lisa Almonte, Andrei Shumilin, Juan Salvador‐Sánchez, Ana Pérez‐Rodríguez, Iñaki Orue, Andrés Cantarero, Andres Castellanos‐Gomez, Federico Mompeán, Mar Garcia‐Hernandez, Efrén Navarro‐Moratalla, Enrique Diez, Mario Amado, José J. Baldoví, M. Reyes Calvo   +19 more
wiley   +1 more source

Exploring the biomechanical complexity of glioblastoma spheroids and organoids with co-localized Brillouin and Raman microspectroscopy

Biochemistry and Biophysics Reports
Brillouin microscopy allows mechanical investigations of biological materials at the subcellular level and can be integrated with Raman spectroscopy for simultaneous chemical mapping, thus enabling a more comprehensive interpretation of biomechanics. The
Roberta Galli, Jan Rix, Tina Leonidou, Katrin Kirsche, Edmund Koch, Achim Temme, Ilker Y. Eyüpoglu, Ortrud Uckermann   +7 more
doaj   +1 more source

Phonon dispersion curves of two-dimensional colloidal crystals: on the wavelength dependence of friction

, 2008
Digital video-microscopy measurements are reported of both elastic bandstructures and overdamped phonon decay times in two-dimensional colloidal crystals.
Baumgartl, Joerg, Bechinger, Clemens, Dietrich, Julian, Dobnikar, Jure, von Gruenberg, Hans Hennig   +4 more
core   +1 more source