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DTSTART;TZID=Europe/Paris:20261103T140000
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DTSTAMP:20261015T124748Z
CREATED:20261015T124748Z
LAST-MODIFIED:20261015T124748Z
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SUMMARY:Buyun ZHENG (doctorant)
DESCRIPTION:Physical properties and structure–property relationships in silver nanowire networks for low-emissivity applications\nRésumé : \nThe increasing demand for energy-efficient windows has stimulated the development of transparent low-emissivity (low-E) coatings capable of reducing radiative heat transfer while maintaining high visible transparency. Conventional low-E technologies\, such as metal-based multilayer structures and transparent conductive oxides\, provide high optical and infrared performance but may involve limitations related to flexibility\, processing\, or manufacturing complexity. Silver nanowire (AgNW) networks have emerged as a promising alternative owing to their low infrared emissivity\, high optical transparency\, mechanical flexibility\, and compatibility with scalable deposition processes. \nThis thesis investigates the physical properties of AgNW networks and their potential integration into low-E coatings\, with particular emphasis on structure–property relationships. The influence of key structural parameters\, including nanowire diameter\, length\, density\, and alignment\, is investigated through experimental characterization and physical analysis. In particular\, an optical percolation transition is identified at a network density well above the electrical percolation threshold\, accompanied by a transition in infrared angular emissivity from dielectric-like to metallic-like behavior. Furthermore\, dense AgNW networks are further shown to follow a generalized Hagen–Rubens relationship\, enabling infrared emissivity to be directly related to the electrical properties of the network. The impact of nanowire dimensions and network topology on low-E performance is further investigated to identify the structural parameters governing the trade-off between visible transparency and infrared emissivity. The stability of AgNW networks is also addressed through the deposition of oxide layers by spatial atomic layer deposition (SALD)\, with the aim of improving environmental and thermal stability while assessing their influence on the optical and emissive properties of the resulting coatings. Overall\, this work contributes to a more comprehensive understanding of the structure–property relationships in AgNW networks and provides physical insights into their use as transparent low-E coatings for energy-efficient applications. \nShort Bio/CV \nBuyun Zheng is a PhD student at the Laboratoire des Matériaux et du Génie Physique (LMGP).  His research focuses on the physical properties of silver nanowire (AgNW) networks and their integration into low-emissivity (low-E) coatings for energy-efficient windows. His work investigates how network structure influences the electrical\, optical\, and infrared properties of AgNW networks\, with particular interest in percolation phenomena and network topology. \n_ \nContact : deborah.verger@grenoble-inp.fr
URL:https://sfp-alpes.fr/event/buyun-zheng-doctorant/
LOCATION:LMGP – salle des séminaires\, Grenoble INP -Phelma 3 parvis Louis Néel\, Grenoble\, 38054\, France
CATEGORIES:Séminaire
ORGANIZER;CN="LMGP":MAILTO:deborah.verger@grenoble-inp.fr
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DTSTART;TZID=Europe/Paris:20261103T140000
DTEND;TZID=Europe/Paris:20261103T150000
DTSTAMP:20261016T083835Z
CREATED:20261016T083835Z
LAST-MODIFIED:20261016T083835Z
UID:10000311-1793714400-1793718000@sfp-alpes.fr
SUMMARY:Giovanna MORIGI (Saarland University)
DESCRIPTION:Searching a quantum database using noise\nRésumé : \nEfficient retrieval of information is a core operation in the world wide web\, is essential for the sustainance of living organism\, and is a paradigm for optimization. Quantum physics holds the promise for a quadratic speedup with respect to existing classical search algorithms. Achieving such speedup\, however\, requires an outstanding degree of control of the quantum dynamics of systems of large size. This implies the suppression and corrections of the errors induced by the unavoidable action of the external environment. In this talk\, we will take inspiration from foraging in nature\, which results from the interplay of deterministic dynamics and stochasticity\, and discuss examples of quantum search dynamics emerging from the interplay between quantum coherent processes and the action of an external reservoir. We will discuss how these insights can contribute to our understanding of out-of-equilibrium dynamics in the quantum world and of the mechanisms of their stabilization\, and how they could pave the way for a novel class of robust quantum algorithms. \n_ \nContact : sergey.skipetrov@lpmmc.cnrs.fr
URL:https://sfp-alpes.fr/event/giovanna-morigi-saarland-university/
LOCATION:CNRS – Bâtiment A\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38054\, France
CATEGORIES:Séminaire
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