title: Preparation of Anisotropic and Oriented Particles on a Flexible Substrate.
abstract: Elongated plasmonic nanoparticles show superior optical properties when compared to spherical ones. Facile, versatile and cost-effective bottom-up approaches for fabrication of anisotropic nanoparticles in solution have been developed. However, fabrication of 2-D plasmonic templates from elongated nanoparticles with spatial arrangement at the surface is still a challenge. We used controlled seed-mediated growth in the presence of porous and functionalized surface of flexible polydimethylsiloxane (PDMS) templates to provide directional growth and formation of elongated gold nanoparticles (AuNPs). Atomic force microscopy (AFM) and spectroscopy revealed embedding of the particles within the functionalized porous surface of PDMS. Nanoparticles shapes were observed with transmission electron microscope (TEM), UV-Vis spectroscopy, and X-ray powder diffraction (XRPD) measurements, which revealed an overall orientation of particles at the surface. Anisotropic and oriented particles on a flexible substrate are of interest for sensing applications.
authors.affiliation: Department of Physical Chemistry, University of Geneva , 30 Quai Ernest-Ansermet, 1211 Geneva, Switzerland.
authors.forename: Mahshid
authors.initials: M
authors.lastname: Chekini
authors.affiliation: Department of Physical Chemistry, University of Geneva , 30 Quai Ernest-Ansermet, 1211 Geneva, Switzerland.
authors.forename: Ugo
authors.initials: U
authors.lastname: Cataldi
authors.affiliation: Department of Inorganic and Analytic Chemistry, University of Geneva , 30 Quai Ernest-Ansermet, 1211 Geneva, Switzerland.
authors.forename: Plinio
authors.initials: P
authors.lastname: Maroni
authors.affiliation: Department of Quantum Matter Physics, Laboratory of Crystallography, University of Geneva , 24 Quai Ernest-Ansermet, 1211 Geneva, Switzerland.
authors.forename: Laure
authors.initials: L
authors.lastname: Guénée
authors.affiliation: Department of Quantum Matter Physics, Laboratory of Crystallography, University of Geneva , 24 Quai Ernest-Ansermet, 1211 Geneva, Switzerland.
authors.forename: Radovan
authors.initials: R
authors.lastname: Černý
authors.affiliation: Department of Physical Chemistry, University of Geneva , 30 Quai Ernest-Ansermet, 1211 Geneva, Switzerland.
authors.forename: Thomas
authors.initials: T
authors.lastname: Bürgi