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Achieving very high cycle fatigue performance of Au thin films for flexible electronic applications

Journal of Materials Science & Technology 2021年第30期89卷 107-113页

作者： Hong-Lei Chen Xue-Mei Luo Dong Wang peter schaaf Guang-Ping Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Institute of Materials Engineering and Institute of Micro-and Nanotechnologies MacroNano® TU IlmenauGustav-Kirchhoff-Str.598693 IlmenauGermany

The fatigue damage behavior of the nanocrystalline Au films on polyimide substrates was *** was found that the very high-cycle fatigue damage resistance of the Au film was significantly enhanced by at least a factor of~2 in supported loading through adding an ultrathin Ti interlayer at the Au film/polyimide *** a better fatigue damage resistance is mainly ascribed to the effective suppression of voiding at the Au film/polyimide interface through modulation of the Au/Ti interface,and thus the propensity of the cyclic strain localization and grain boundary cracking is *** finding may provide a potential strategy for the design of flexible devices with ultra-long fatigue life.

关键词： Thin films Ti interlayer Fatigue Extrusion Interface

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Long-lived electron emission reveals localized plasmon modes in disordered nanosponge antennas

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Light(Science & Applications) 2017年第1期6卷 458-465页

作者： Germann Hergert Jan Vogelsang Felix Schwarz Dong Wang Heiko Kollmann Petra Groß Christoph Lienau Erich Runge peter schaaf Carl von Ossietzky Universität Institut für PhysikCenter of Interface ScienceD-26129 OldenburgNiedersachsenGermany Technische Universität Ilmenau Institut für Physik and Institut für Mikro-und Nanotechnologien MacroNano®D-98693 IlmenauThüringenGermany Technische Universität Ilmenau Institut für Mikro-und Nanotechnologien MacroNano®and Institut für WerkstofftechnikFachgebiet Werkstoffe der ElektrotechnikD-98693 IlmenauThüringenGermany Forschungszentrum Neurosensorik Carl von Ossietzky UniversitätD-26111 OldenburgNiedersachsenGermany

We report long-lived,highly spatially localized plasmon states on the surface of nanoporous gold nanoparticles—nanosponges—with high excitation *** is well known that disorder on the nanometer scale,particularly in two-dimensional systems,can lead to plasmon localization and large field enhancements,which can,in turn,be used to enhance nonlinear optical effects and to study and exploit quantum optical ***,we introduce promising,three-dimensional model systems for light capture and plasmon localization as gold nanosponges that are formed by the dewetting of gold/silver bilayers and *** study light-induced electron emission from single nanosponges,a nonlinear process with exponents of n≈5...7,using ultrashort laser pulse excitation to achieve femtosecond time *** long-lived electron emission process proves,in combination with optical extinction measurements and finite-difference time-domain calculations,the existence of localized modes with lifetimes of more than 20 *** electrons couple efficiently to the dipole antenna mode of each individual nanosponge,which in turn couples to the ***,individual gold nanosponges are cheap and robust disordered nanoantennas with strong local resonances,and an ensemble of nanosponges constitutes a meta material with a strong polarization independent,nonlinear response over a wide frequency range.

关键词： disorder-induced plasmon localization nanoantennas nanoporous gold nanoparticles ultrafast photoemission spectroscopy

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Phase equilibrium modelling of the amphibolite facies metamorphism in the Yelapa-Chimo Metamorphic Complex, Mexico

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Geoscience Frontiers 2021年第1期12卷 293-312页

作者： Fabian Gutierrez-Aguilar peter schaaf Gabriela Solís-Pichardo Gerardo F.Arrieta-García Teodoro Hernandez-Trevino Carlos Linares-Lopez Posgrado en Ciencias de la Tierra Instituto de GeofísicaUniversidad Nacional Autonoma de MexicoAv.Universidad 3000Ciudad de Mexico04510Mexico Laboratorio Universitario de Geoquímica Isotopica(LUGIS) Instituto de GeofísicaUniversidad Nacional Autonoma de MexicoAv.Universidad 3000Ciudad de Mexico04510Mexico Laboratorio Universitario de Geoquímica Isotopica(LUGIS) Instituto de GeologíaUniversidad Nacional Autonoma de MexicoAv.Universidad 3000Ciudad de Mexico04510Mexico Instituto de Geofísica Universidad Nacional Autonoma de MexicoAv.Universidad 3000Ciudad de Mexico04510Mexico

The Yelapa-Chimo Metamorphic Complex forms part of the Jalisco Block in western Mexico and exposes a wide range of Early Cretaceous metamorphic rocks;such as paragneiss,orthogneiss,amphibolites,and ***,the pressure-temperature(P-T)conditions of metamorphism and partial melting remain poorly studied in the *** elucidate metamorphic P-T conditions,phase equilibrium modelling was applied to two sillimanite-garnet paragneisses,one amphibole-orthogneiss,and one ***-garnet paragneisses exhibit a lepidoblastic texture with a biotite+sillimanite+kyanite+garnet+quartz+plagioclase+K-feldspar mineral ***-orthogneiss and amphibolite display a nematoblastic texture with an amphibole+(1)plagioclase+quartz+(1)titanite assemblage and an amphibole+(2)plagioclase+(2)titanite+ilmenite retrograde mineral *** calculated for the two sillimanite-garnet paragneiss samples show P-T peak conditions at~6-7.5 kbar and~725-740℃.The results for amphibole-orthogneiss and the amphibolite yield P-T peak conditions at~8.5-10 kbar and~690-710℃.The mode models imply that metasedimentary and metaigneous units can produce up to~20 vol%and~10 vol%of melt,*** within a closed system during isobaric heating suggests that melt compositions of metasedimentary and metaigneous units are likely to have direct implications for the petrogenesis of the Puerto Vallarta *** new data indicate that the Yelapa-Chimo Metamorphic Complex evolved through a metamorphic gradient between~23-33℃km^-1and the metamorphic rocks formed at depths between~22 km and~30 km with a burial rate of~2.0 km Ma^-***,the P-T data for both metasedimentary and metaigneous rocks provide new constraints on an accretionary framework,which is responsible for generating metamorphism and partial melting in the YelapaChimo Metamorphic Complex during the Early Cretaceous.

关键词： Phase equilibrium modelling Yelapa-Chimo Metamorphic Complex Amphibolite facies Partial melting

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