Dataset Information

Solution processed multi-layered thin films of Ge₂₀Sb₅S₇₅ and Ge₂₀Sb₅Se₇₅ chalcogenide glasses.

ABSTRACT: Solution processed non-toxic Ge₂₀Sb₅Se₇₅ chalcogenide glass thin films were deposited using spin-coating method from n-propylamine-methanol solvent mixture in specular optical quality. Optical properties, composition, structure, and chemical resistance were studied in dependence on the annealing temperature. Significant increase of refractive index and chemical resistance caused by thermoinduced structural polymerization and release of organic residua were observed. The high chemical resistance of hard-baked thin films allowed repeated direct depositions by spin-coating, increasing total thickness. Multilayered thin films of amorphous Ge₂₀Sb₅Se₇₅ and Ge₂₀Sb₅S₇₅ were also successfully prepared by direct deposition for the first time. Solution based deposition of non-toxic Ge₂₀Sb₅Se₇₅ thin films in specular optical quality significantly widens the applicability of solution processed chalcogenide glass thin films. Moreover, solution based direct deposition of different glasses on hard-baked thin films opens the way to simple and cost-effective preparation of more sophisticated optical elements (e.g. beam splitters, photonic mirrors).

SUBMITTER: Jemelka J

PROVIDER: S-EPMC10547712 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Solution processed multi-layered thin films of Ge20Sb5S75 and Ge20Sb5Se75 chalcogenide glasses.

Jemelka Jiri J Palka Karel K Janicek Petr P Slang Stanislav S Jancalek Jiri J Kurka Michal M Vlcek Miroslav M

Scientific reports 20231003 1

Solution processed non-toxic Ge20Sb5Se75 chalcogenide glass thin films were deposited using spin-coating method from n-propylamine-methanol solvent mixture in specular optical quality. Optical properties, composition, structure, and chemical resistance were studied in dependence on the annealing temperature. Significant increase of refractive index and chemical resistance caused by thermoinduced structural polymerization and release of organic residua were observ ...[more]

PMID: 37789107

Similar Datasets

Project description:In vivo cancer detection based on the mid-infrared molecular fingerprint of tissue is promising for the fast diagnosis and treatment of suspected cancer patients. Few materials are mid-infrared transmissive, even fewer, which can be converted into functional, low-loss optical fibres for in vivo non-invasive testing. Chalcogenide-based glass optical fibres are, however, one of the few. These glasses are transmissive in the mid-infrared and are currently under development for use in molecular sensing devices. The cytotoxicity of these materials is however unknown. The cytotoxicity of Ge-Sb-Se chalcogenide optical glass fibres on 3T3 mouse fibroblast cells is here investigated. Fibres exposed to four different pre-treatment conditions are used: as-drawn (AD), propylamine-etched (PE), oxidised-and-washed (OW) and oxidised (Ox). To achieve the latter two conditions, fibres are treated with H2O2(aqueous (aq.)) and dried to produce a surface oxide layer; this is either washed off (OW) or left on the glass surface (Ox). Cellular response is investigated via 3 day elution and 14 day direct contact trials. The concentration of the metalloids (Ge, Sb and Se) in each leachate was measured via inductively coupled plasma mass spectrometry. Cell viability is assessed using the neutral red assay and scanning electron microscopy. The concentration of Ge, Sb and Se ions after a 3 day dissolution was as follows. In AD leachates, Ge: 0.40 mg L-1, Sb: 0.17 mg L-1, and Se: 0.06 mg L-1. In PE leachates, Ge: 0.22 mg L-1, Sb: 0.15 mg L-1, and Se: 0.02 mg L-1. In Ox leachates, Ge: 823.8 mg L-1, Sb: 2586.6 mg L-1, and Se: 3750 mg L-1. Direct contact trials show confluent cell layers on AD, PE and OW fibres after 14 days, while no cells are observed on the Ox surfaces. A >50% cell viability is observed in AD, PE and OW eluates after 3 days, when compared with Ox eluates (<10% cell viability). Toxicity in Ox is attributed to the notable pH change, from neutral pH 7.49 to acidic pH 2.44, that takes place on dissolution of the surface oxide layer in the growth media. We conclude, as-prepared Ge-Sb-Se glasses are cytocompatible and toxicity arises when an oxide layer is forced to develop on the glass surface.

Dataset Information

Solution processed multi-layered thin films of Ge₂₀Sb₅S₇₅ and Ge₂₀Sb₅Se₇₅ chalcogenide glasses.

Publications

Solution processed multi-layered thin films of Ge<sub>20</sub>Sb<sub>5</sub>S<sub>75</sub> and Ge<sub>20</sub>Sb<sub>5</sub>Se<sub>75</sub> chalcogenide glasses.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets