Structural, chemical and optical properties of the polyethylene–copper sulfide composite thin films synthesized using polythionic acid as sulfur source

Ancutienė, Ingrida; Navea, Juan G.; Baltrušaitis, Jonas

doi:10.1016/j.apsusc.2015.04.114

Cited by 9 publications

(2 citation statements)

References 46 publications

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“…) from aqueous solutions into the PA substrate [30]. After treating these anion-containing polyamide samples with aqueous solutions of metal cations different binary metal selenide layers on the polymer surface were obtained [31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Influence of chemical composition and doping on optical properties of thallium selenide layers prepared by adsorption/diffusion method

Samardokas¹,

Ivanauskas²,

Žalenkienė³

et al. 2021

chemija

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In this work, we investigated the formation of Tl-Se layers followed by doping with metal cations. A two-stage adsorption/diffusion process used to form Tl-Se layers involves (a) selenization in potassium selenotrithionate solution followed by (b) treatment with Tl+ precursor solutions. These layers have been successfully doped with Cu+/Cu2+, Ga3+ and Ag+ cations using a cation exchange reaction. The resulting chemical compositions of Tl-Se and Tl-M-Se (M = Cu, Ga, Ag) layers were investigated using the EDS and AAS methods. The bulk elemental composition and the Tl/Se molar ratio of the Tl-Se layers varied with the concentration of the Tl+ precursor solution, the exposure time in the Tl+ precursor solution, and the form of the Tl+ in the solution, whereas the EDS analysis showed that the surface was slightly enriched in thallium. The optical properties of the formed layers were studied. These layers were identified using room temperature reflection spectrum, the values of absorption edge, bandgap (Eg), band tail width (Urbach energy, EU) of the localised states, Steepness parameter (σ) and electron–phonon interaction (Ee-p).

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Section: Introductionmentioning

confidence: 99%

Influence of chemical composition and doping on optical properties of thallium selenide layers prepared by adsorption/diffusion method

Samardokas¹,

Ivanauskas²,

Žalenkienė³

et al. 2021

chemija

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“…Recently at the Department of Inorganic Chemistry the sorption-diffusion method of low density polyethylene (LDPE) modification by semiconductor and electrically conductive layers of Cu x S has been investigated. By means of this method, first of all, PE is saturated with sulphur treating with the solutions of higher polythionic acids, H 2 S n O 6 (n = 9-45) [18,19], and then it is treated with a water solution of copper (II/I) salts [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Higher polythionic acids – the precursors for formation of thallium sulphide layers on polyethylene surface

Janickis¹,

Bružaitė²

2018

chemija

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The method of thallium sulphide thin films deposition on low density polyethylene (LDPE), based on applying solutions of higher polythionic acids (H2SnO6, n = 21, 33, 45), was developed and investigated. The concentration of sulphur in the LDPE film increases with the increase of temperature of higher polythionic acid solution and its sulphurity, as well as the duration of retention of LDPE in its solution is prolonged. The sulphur concentration in the PE film under the same duration of sulphurisation and repetition of treatment cycles insignificantly changes. When the sulphurised LDPE was treated with a thallium Tl(I) salt solution, sulphur present in the polymer reacts with thallium ions and the layers of thallium sulphides, TlxSy, of different composition are formed. The stoichiometric composition of the layer changes from Tl0.1S to Tl2.6S. The amount of thallium increases in the sulphide layers when the number of the cycles of LDPE sulphurisation in the H2S33O6 solution and treatment of sulphurised polymer with the Tl(I) salt solution is increased. The stoichiometric composition of TlxSy coats of one treatment cycle samples changes from Tl0.5S to Tl1.1S. The X-ray diffraction analysis of the polyethylene, treated with the solution of higher polythionic acid, H2S33O6, and then with the Tl(I) salt solution, confirmed the premise that on the LDPE surface the layers of thallium sulphides, TlxSy, were formed. Five phases of thallium sulphides were identified: TlS, Tl2S, Tl2S2, Tl4S3 and Tl2S5. The TlS phase prevailed in diffractograms. The chemical and phase composition of the TlxSy layers surface (up to 1 nm depth) is identified by X-ray photo-electronic spectroscopy analysis. The analysis data confirmed that the compounds of TlS, Tl2S, Tl2SO4, Tl(OH)3, S8 and Tl2O3 were formed on the surface of the layers. The morphology of thallium sulphide layers and the mechanism of their formation are determined by means of scanning atomic force and electronic microscopy. Two processes take place during the formation of the layer: desorption of sulphur and reaction of thallium ions from the thallium(I) salt solution with sulphur present on the LDPE surface. The layer of thallium sulphides is formed on the surface of the sulphur layer. Deposition of thallium sulpfide films from the solution of higher polythionic acid on the LDPE films is not homogeneous, it has the separated island type morphology. The identified regularities let purposively choose the conditions for sulphurisation of LDPE films by using the solution of higher polythionic acid as the agent of polymer sulphurisation in order to compose the layers of thallium sulphides, TlxSy, of the desired chemical and phasic composition on the surface of this polymer by means of the sorption–diffusion method.

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Structural, morphological, compositional and optical properties of CoS2 thin films synthesized by adsorption-diffusion method

Vaiciukynaite,

Zalenkiene,

Ancutiene

et al. 2024

Current Applied Physics

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Structural, chemical and optical properties of the polyethylene–copper sulfide composite thin films synthesized using polythionic acid as sulfur source

Cited by 9 publications

References 46 publications

Influence of chemical composition and doping on optical properties of thallium selenide layers prepared by adsorption/diffusion method

Influence of chemical composition and doping on optical properties of thallium selenide layers prepared by adsorption/diffusion method

Higher polythionic acids – the precursors for formation of thallium sulphide layers on polyethylene surface

Structural, morphological, compositional and optical properties of CoS2 thin films synthesized by adsorption-diffusion method

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