Optical and structural properties of Ag:Ta2O5 nanocomposites.

Optical and structural properties of Ag:Ta2O5 nanocomposites.

Journal of nanoscience and nanotechnology (2013-07-19)

Geon Joon Lee, Hee Soo Kim, Chong Seung Yoon, Jihye Kim, Inkyu Park, Young Pak Lee

ABSTRACT

In this paper, we investigated the optical and structural properties of the Ag:Ta2O5 nanocomposites. The nanocomposite films were prepared by magnetron co-sputtering of Ta2O5 with Ag chips. The transmission electron microscopy images clearly revealed that Ag nanoparticles were successfully produced by post-thermal annealing of the deposited films. The reflection spectra exhibited the surface plasmon resonance behavior. The photoluminescence (PL) spectra indicated that the Ag:Ta2O5 nanocomposites exhibited larger PL intensity than pure Ag or pure Ta2O5. The PL enhancement is thought to be due to the surface plasmon resonance of Ag nanoparticles. From the spatial intensity distributions that were obtained by solving Maxwell equations using the three-dimensional, finite-difference time-domain method, we found that there was strong confinement of optical field near the Ag nanoparticle. This optical confinement effect makes it possible to exhibit the enhanced PL.

MATERIALS

Product Number

Brand

Product Description

739448

Sigma-Aldrich

Silver nanowires, diam. × L 100 nm × 6 μm, 0.5% (isopropyl alcohol suspension)

739421

Sigma-Aldrich

Silver nanowires, diam. × L 50 nm × 6 μm, 0.5% (isopropyl alcohol suspension)

85131

Sigma-Aldrich

Silver, colloidal, 65-75% Ag basis

357243

Sigma-Aldrich

Tantalum, foil, thickness 0.05 mm, ≥99.9% trace metals basis

348783

Sigma-Aldrich

Silver, wire, diam. 0.1 mm, 99.9% trace metals basis

484059

Sigma-Aldrich

Silver, nanopowder, <150 nm particle size, 99% trace metals basis

262846

Sigma-Aldrich

Tantalum, powder, −325 mesh, 99.9% trace metals basis

327050

Sigma-Aldrich

Silver, shot, 1-3 mm, ≥99.99% trace metals basis

265608

Sigma-Aldrich

Silver, wire, diam. 1.0 mm, 99.9% trace metals basis

265586

Sigma-Aldrich

Silver, wire, diam. 0.5 mm, ≥99.99% trace metals basis

265594

Sigma-Aldrich

Silver, wire, diam. 1.0 mm, ≥99.99% trace metals basis

326976

Sigma-Aldrich

Silver, foil, thickness 2.0 mm, 99.9% trace metals basis

265500

Sigma-Aldrich

Silver, powder, <250 μm, 99.99% trace metals basis

295744

Sigma-Aldrich

Silver, wool, diam. 0.05 mm, ≥99.9% trace metals basis

265551

Sigma-Aldrich

Silver, wire, diam. 0.127 mm, 99.99% trace metals basis

265527

Sigma-Aldrich

Silver, foil, thickness 0.1 mm, 99.9% trace metals basis

369438

Sigma-Aldrich

Silver, foil, thickness 1.0 mm, 99.99% trace metals basis

735825

Sigma-Aldrich

Silver, conductive paste

692824

Sigma-Aldrich

Tantalum, powder, 60-100 mesh, 99.9%

327077

Sigma-Aldrich

Silver, flakes, 10 μm, ≥99.9% trace metals basis

327018

Sigma-Aldrich

Silver, wire, diam. 2.0 mm, 99.9% trace metals basis

326984

Sigma-Aldrich

Silver, foil, thickness 0.25 mm, 99.9% trace metals basis

265578

Sigma-Aldrich

Silver, wire, diam. 0.25 mm, 99.9% trace metals basis

265519

Sigma-Aldrich

Silver, foil, thickness 0.025 mm, 99.9% trace metals basis

327034

Sigma-Aldrich

Silver, wire, diam. 0.25 mm, ≥99.99% trace metals basis

327026

Sigma-Aldrich

Silver, wire, diam. 0.5 mm, 99.9% trace metals basis

327085

Sigma-Aldrich

Silver, powder, 2-3.5 μm, ≥99.9% trace metals basis

348759

Sigma-Aldrich

Silver, wire, diam. 1.5 mm, ≥99.99% trace metals basis

327107

Sigma-Aldrich

Silver, powder, <45 μm, ≥99.99% trace metals basis

327093

Sigma-Aldrich

Silver, powder, 5-8 μm, ≥99.9% trace metals basis