Mur Mitoyen devient Caligram!
Une nouvelle plateforme moderne et agréable, actuellement en version bêta.

 à 

amphitheatre (salle 1035)
5155, chemin de la rampe
Montréal (QC) Canada  H3T 2B2

Charge transport in action – or why Atomic Force Microscopy is much more than pretty images
Peter Grutter, Physics Department, McGill

abstract: Atomic Force Microscopy (AFM) is a technique that allows atomic scale spatial resolution on essentially any material, including insulators and metals, in essentially any environment: from ultra high vacuum to liquids, at temperatures of several 100K down to mK.  These images allow extraction of detailed structural information, in particular when combined with state of the art modeling. Many properties, such as electrical surface potential, elasticity, yield stress, adhesion or friction can be measured and correlated to structure, often as a function of external parameters such as light or electrochemical potential. Completing this ‘nanolab’ is the capability of AFM to manipulate objects. In this seminar I will concentrate on structure-property AFM experiments that can give us fundamental insights in fields which have major potential for important applications. Some of the fundamental questions we are trying to address are: how is charge separated in organic photovoltaics? What determines Li mobility in batteries? How does the electrical conductivity of a nanometer scale contact depend on mechanical properties? What induces the formation of a synapse in a neuron? In particular, I will focus on techniques recently developed in my lab allowing time resolved measurements of properties using AFM down to time scales below 1ps.  By describing my research group’s ongoing attempts to find answers to these questions I will also demonstrate how state-of-the-art AFM goes well beyond being a tool to make ‘pretty’ images.

Pour en savoir plus au sujet des activités de recherche du Prof. Grutter, consulter la page web de son groupe.

Cette conférence est présentée par le RQMP Versant Nord du Département de physique de l'Université de Montréal et de Génie physique de la Polytechnique.

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