title: Tuning temperature and size of hot spots and hot-spot arrays.
abstract: By using scanning thermal microscopy, it is shown that nanoscale constrictions in metallic microwires deposited on an oxidized silicon substrate can be tuned in terms of temperature and confinement size. High-resolution temperature maps indeed show that submicrometer hot spots and hot-spot arrays are obtained when the SiO(2) layer thickness decreases below 100 nm. When the SiO(2) thickness becomes larger, heat is less confined in the vicinity of the constrictions and laterally spreads all along the microwire. These results are in good agreement with numerical simulations, which provide dependences between silica-layer thickness and nanodot shape and temperature.
authors.affiliation: Laboratoire de Physique et d'Etude des Matériaux, UMR 8213 CNRS/ ESPCI/ UPMC, 10 Rue Vauquelin, 75231 Paris Cedex 5, France.
authors.forename: Elika
authors.initials: E
authors.lastname: Saïdi
authors.forename: Nicolas
authors.initials: N
authors.lastname: Babinet
authors.forename: Loïc
authors.initials: L
authors.lastname: Lalouat
authors.forename: Jérôme
authors.initials: J
authors.lastname: Lesueur
authors.forename: Lionel
authors.initials: L
authors.lastname: Aigouy
authors.forename: Sébastian
authors.initials: S
authors.lastname: Volz
authors.forename: Jessica
authors.initials: J
authors.lastname: Labéguerie-Egéa
authors.forename: Michel
authors.initials: M
authors.lastname: Mortier
mesh_terms: D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D013696:Temperature