title: Self-Organization of Gold Nanoparticle Assemblies with 3D Spatial Order and Their External Stimuli Responsiveness.
abstract: Gold nanoparticles (AuNP) with pyridyl end-capped polystyrenes (PS-4VP) as "quasi-monodentate" ligands self-assemble into ordered PS-4VP/AuNP nanostructures with 3D hexagonal spatial order in the dried solid state. The key for the formation of these ordered structures is the modulation of the ratio AuNP versus ligands, which proves the importance of ligand design and quantity for the preparation of novel ordered polymer/metal nanoparticle conjugates. Although the assemblies of PS-4VP/AuNP in dispersion lack in high dimensional order, strong plasmonic interactions are observed due to close contact of AuNP. Applying temperature as an external stimulus allows the reversible distortion of plasmonic interactions within the AuNP nanocomposite structures, which can be observed directly by naked eye. The modulation of the macroscopic optical properties accompanied by this structural distortion of plasmonic interaction opens up very interesting sensoric applications.
authors.affiliation: Macromolecular Chemistry II and Bayreuth Center for Colloids and Interfaces, Universität Bayreuth, Universitätsstraße 30, 95440, Bayreuth, Germany.
authors.forename: Melissa S
authors.initials: MS
authors.lastname: Köhn Serrano
authors.affiliation: Physical Chemistry II and Bayreuth Center for Colloids and Interfaces, Universität Bayreuth, Universitätsstraße 30, 95440, Bayreuth.
authors.forename: Tobias A F
authors.initials: TA
authors.lastname: König
authors.affiliation: Department of Applied Physics, School of Science, Aalto University, FIN-0215, Espoo, Finland.
authors.forename: Johannes S
authors.initials: JS
authors.lastname: Haataja
authors.affiliation: Department of Applied Physics, School of Science, Aalto University, FIN-0215, Espoo, Finland.
authors.forename: Tina I
authors.initials: TI
authors.lastname: Löbling
authors.affiliation: Macromolecular Chemistry II and Bayreuth Center for Colloids and Interfaces, Universität Bayreuth, Universitätsstraße 30, 95440, Bayreuth, Germany.
authors.forename: Holger
authors.initials: H
authors.lastname: Schmalz
authors.affiliation: Macromolecular Chemistry II and Bayreuth Center for Colloids and Interfaces, Universität Bayreuth, Universitätsstraße 30, 95440, Bayreuth, Germany.
authors.forename: Seema
authors.initials: S
authors.lastname: Agarwal
authors.affiliation: Physical Chemistry II and Bayreuth Center for Colloids and Interfaces, Universität Bayreuth, Universitätsstraße 30, 95440, Bayreuth.
authors.forename: Andreas
authors.initials: A
authors.lastname: Fery
authors.affiliation: Macromolecular Chemistry II and Bayreuth Center for Colloids and Interfaces, Universität Bayreuth, Universitätsstraße 30, 95440, Bayreuth, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Greiner
mesh_terms: D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D011108:Polymers / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature
chemical_list: D011108:Polymers; D006046:Gold
keywords: gold nanoparticles; nanostructures; self-assembly; sensors