Journal
THIN SOLID FILMS
Volume 581, Issue -, Pages 14-19Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2014.11.063
Keywords
Plasmonics; Nanocomposites; Silver; PDMS; Solar absorption
Categories
Funding
- Strategic Infrastructure Project of DESMI [NEW INFRASTRUCTURE/STPATH/0308/04]
- European Regional Development Fund
- European Social Fund
- Cohesion Fund
- Research Promotion Foundation of the Republic of Cyprus
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In this work, we produce functionally graded nanocomposites consisting of silver (Ag) plasmonic nanoparticles (PNPs) supported in a poly(dimethylsiloxane) (PDMS) matrix. PDMS was selected due to its high optical transparency, nontoxicity and ease of use. The Ag PNPs were formed by annealing sputtered Ag ultra-thin films and were subsequently capped by a spin-coated PDMS layer. We investigate the factors that affect their plasmonic behavior, such as the PNP size, the annealing conditions and the surrounding environment. In order to achieve broadband absorption, we developed PDMS/Ag(PNPs) multilayers with graded PNP size. Thus, we demonstrate the significance of the stacking sequence of various plasmonic layers sandwiched between PDMS layers and its potential for tailoring the plasmonic response of multilayer structure. As a demonstration of this approach, we deposited a specially designed multilayer structure, whose optical extinction resembles the solar emission spectrum. (C) 2014 Elsevier B.V. All rights reserved.
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