Results 81 to 90 of about 49,672 (273)

A New Threshold Switching Device With Tunable Negative Differential Resistance Based on ErMnO3 Polymorphs

Advanced Functional Materials, EarlyView.
Polymorph engineering in ErMnO3 enables low‐voltage, forming‐free threshold switching with tunable negative differential resistance. Conducting orthorhombic regions embedded in an insulating hexagonal matrix provide controlled Joule‐heating‐enhanced Poole–Frenkel transport. The hexagonal phase prevents excessive heating and breakdown.
Rong Wu, Florian Maudet, Thanh Luan Phan, Wassim Hamouda, Richard Schroedter, Ahmet Samil Demirkol, Ronald Tetzlaff, Veeresh Deshpande, Catherine Dubourdieu   +8 more
wiley   +1 more source

Spectroscopic characterization of graphene films grown on Pt (111) surface by chemical vapor deposition of ethylene [PDF]

, 2013
This work reports the peculiar properties of a graphene film prepared by the chemical vapor deposition (CVD) of ethylene in high vacuum on a well oriented and carefully cleaned Pt(111) crystal surface maintained at high temperature.
Benedek, Borca, Castriota, Castro Neto, Chae, Ferrari, Ferrari, Frank, Fujita, Gao, Gao, Gao, Gao, Grodecki, Guermoune, Gupta, Herzberg, Hwang, Kang, Karssemeijer, Loginova, Malard, Marchenko, Merino, Miniussi, Murata, Otero, Park, Politano, Politano, Politano, Politano, Politano, Politano, Politano, Preobrajenski, Sharma, Shivaraman, Starodub, Sutter, Sutter, Vinogradov, Wintterlin, Yamada, Zabel   +44 more
core   +2 more sources

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

Advanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source

STRUCTURAL AND MECHANICAL CHARACTERIZATION OF DEFORMED POLYMER USING CONFOCAL RAMAN MICROSCOPY AND DSC

Acta Polytechnica CTU Proceedings, 2016
Polymers have various interesting properties, which depend largely on their inner structure. One way to influence the macroscopic behaviour is the deformation of the polymer chains, which effects the change in microstructure.
Birgit Neitzel, Florian Aschermayer, Milan Kracalik, Sabine Hild   +3 more
doaj   +1 more source

Identifying suitable substrates for high-quality graphene-based heterostructures

, 2016
We report on a scanning confocal Raman spectroscopy study investigating the strain-uniformity and the overall strain and doping of high-quality chemical vapour deposited (CVD) graphene-based heterostuctures on a large number of different substrate ...
Banszerus, Luca, Beschoten, Bernd, Epping, Alexander, Janssen, Hendrik, Neumaier, Daniel, Otto, Martin, Stampfer, Christoph, Taniguchi, Takashi, Watanabe, Kenji   +8 more
core   +1 more source

Towards drug quantification in human skin with confocal Raman microscopy [PDF]

European Journal of Pharmaceutics and Biopharmaceutics, 2013
Understanding the penetration behaviour of drugs into human skin is a prerequisite for the rational development and evaluation of effective dermal drug delivery. The general procedure for the acquisition of quantitative drug penetration profiles in human skin is performed by sequential segmentation and extraction.
Franzen, Lutz, Selzer, Dominik, Fluhr, Joachim W, Schaefer, Ulrich F, Windbergs, Maike   +4 more
openaire   +3 more sources

From Clinic to Computation: Multiscale Bioengineering Strategies for Durable Biological Aortic Valve Replacements

Advanced Functional Materials, EarlyView.
Bioprosthetic aortic valves have revolutionized the treatment of aortic stenosis, but their durability is limited by structural valve deterioration (SVD). This review focuses on the pericardial tissue at the heart of these valves, examining how its mechanical properties and calcification drive fatigue and failure.
Gabriele Greco, Pierfrancesco Gaziano, Serena Anglese, Simone Morganti, Carlo de Vincentiis, Ferdinando Auricchio, Michele Marino, Michele Conti   +7 more
wiley   +1 more source

Fabrication and electrical transport properties of embedded graphite microwires in a diamond matrix

, 2017
Micrometer width and nanometer thick wires with different shapes were produced $\approx 3~\upmu$m below the surface of a diamond crystal using a microbeam of He$^+$ ions with 1.8~MeV energy.
Barzola-Quiquia, J., Böttner, J., Esquinazi, P., Estrela-Lopis, I., Lühmann, T., Meijer, J., Stiller, M., Wunderlich, R., Zoraghi, M.   +8 more
core   +1 more source

Tracking the dephosphorylation of resveratrol triphosphate in skin by confocal Raman microscopy [PDF]

Journal of Controlled Release, 2007
Polyphenolic resveratrol has been identified as a potent antioxidant acting as both a free radical scavenger and an inhibitor of enzyme oxidative activity. However, the reactive propensity of resveratrol also limits its use in topical formulations. A transient derivative of resveratrol, resveratrol triphosphate, has been designed to provide a means for
Guojin, Zhang, Carol R, Flach, Richard, Mendelsohn   +2 more
openaire   +2 more sources

Interfacial and Crystallographic Regulation of Zinc Anode via Electric Double Layer Reconstruction for Highly Stable Zn Anode

Advanced Functional Materials, EarlyView.
Trace amounts of perfluoro‐1‐butanesulfonyl fluoride enables the regulation of the Zn/electrolyte interface by the generated zincophilic ─SO3H groups with long hydrophobic ─CF2 tails, which adsorb strongly onto the Zn surface, displace water molecules from the inner Helmholtz plane, and reconstruct the electrical double‐layer structure.
Dinesh Patel, Yimei Chen, Ashwini Kumar Sharma, Xiaolei Wang   +3 more
wiley   +1 more source