POLYMER-BASED PHOSPHORENE 2D-NANOCOMPOSITES: PREPARATION AND CHARACTERIZATION

Autor: Elisa PASSAGLIA 1, Francesca CICOGNA 1, Serena COIAI 1, Giulia LORENZETTI 1, Stefano LEGNAIOLI 1, Maria CAPORALI 2, Manuel SERRANO-RUIZ 2, Andrea IENCO 2, Maurizio PERUZZINI 2
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: MoD, Craco, 04
info:cnr-pdr/source/autori:Elisa PASSAGLIA 1, Francesca CICOGNA 1, Serena COIAI 1, Giulia LORENZETTI 1, Stefano LEGNAIOLI 1, Maria CAPORALI 2, Manuel SERRANO-RUIZ 2, Andrea IENCO 2, Maurizio PERUZZINI 2/congresso_nome:MoD/congresso_luogo:Craco/congresso_data:04/anno:2016/pagina_da:/pagina_a:/intervallo_pagine
Popis: Phosphorene, the few layers material obtained by of black phosphorus (BP), is recognized as a 2D material of growing interest particularly for applications in electronics and optoelectronics. BP (the most stable allotrope of elemental phosphorus) is, in fact, built up by puckered layers of phosphorus atoms, held together via weak van der Waals forces. It can be exfoliated generating phosphorene, which exhibits a unique 2D nanostructure with peculiar anisotropy 1. Owing to this characteristic, phosphorene possesses many intriguing properties. It is a semiconductor with thickness-dependent band gap; it shows prominent electron transport capability and low thermal conductance and it has a really good thermal resistance. One of the main drawbacks in the applications of few-layer black phosphorus (2D BP) is its intrinsic instability in ambient atmosphere, undergoing to severe degradation by moisture and oxygen upon prolonged air exposition. The formation of surface oxidized species is responsible for a measurable increase in surface roughness and degradation, with severe detriment of performances of phosphorene-based electronic devices that are prepared and measured in air 2. Here, for the first time, new polymer-based phosphorene nanocomposites (by using polystyrene and polymethylmethacrylate as matrices) were prepared by a solvent blending procedure allowing the embedding of black phosphorus (BP) nanoflakes in the polymer matrix. Raman spectroscopy, X Ray Diffraction and TEM microscopy were employed to investigate the structural features and the morphology of the achieved hybrids, with the aim to evaluate the dispersion level of black phosphorous layers. TGA, DSC analysis as well as thermal oxidation techniques were employed to investigate the thermal stability of the samples, evidencing really interesting polymer-nanofiller synergic effects ascribable to the presence of the 2D-nanomaterial. In particular the BP nanoflakes, once incorporated in the polymer, showed an apparent improved stability even when the composites were stored in air, at room temperature in ambient conditions. These results widen the application possibilities of this really promising nanofiller once polymer-coated.
Databáze: OpenAIRE
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