title: Irreversible thermochromic behavior in gold and silver nanorod/polymeric ionic liquid nanocomposite films.
abstract: The novel application of gold and silver nanorods as irreversible thermochromic dyes in polymeric ionic liquid (PIL) nanocomposites is proposed here. These materials have been synthesized by anion exchange of an imidazolium-based PIL in a solution that also contained gold nanorods. This resulted in the entrapment of the nanoobjects within a solid polymer precipitate. In this article, the effect of the temperature was studied in relation to the change of shape and, consequently, color of the gold or silver nanorods within the films. For the nanocomposites studied here, a maximum of two visual thermochromic transitions was observed for gold nanorods and up to three transitions were observed for silver nanorods.
authors.affiliation: New Materials Department, CIDETEC-Centre for Electrochemical Technologies, Parque Tecnologico de San Sebastian, Paseo Miramon 196, Donostia-San Sebastian, Spain.
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Tollan
authors.forename: Rebeca
authors.initials: R
authors.lastname: Marcilla
authors.forename: Jose A
authors.initials: JA
authors.lastname: Pomposo
authors.forename: Javier
authors.initials: J
authors.lastname: Rodriguez
authors.forename: Javier
authors.initials: J
authors.lastname: Aizpurua
authors.forename: Jon
authors.initials: J
authors.lastname: Molina
authors.forename: David
authors.initials: D
authors.lastname: Mecerreyes
mesh_terms: D006046:Gold / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared; D020349:Surface Plasmon Resonance; D013696:Temperature
chemical_list: D052578:Ionic Liquids; D011108:Polymers; D012834:Silver; D006046:Gold