Related Experiment Video
Updated: Jun 17, 2026

08:38
Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
Published on: August 19, 2016
Nonoxide chalcogenide glasses as infrared optical materials.
1Texas Instruments, Inc., Dallas, Texas, USA.
Applied Optics
|January 9, 2010
Summary
Chalcogenide glasses, synthesized from group VI A, IV A, and V A elements, show promise as novel infrared optical materials. Their properties are evaluated and compared to existing materials, with fabrication challenges noted.
Area of Science:
- Materials Science
- Optics
- Solid State Chemistry
Background:
- Glassy systems utilizing group VI A elements (S, Se, Te) are explored for advanced optical applications.
- Chalcogenide glasses offer unique properties for infrared (IR) optical materials.
Purpose of the Study:
- To review and evaluate chalcogenide glass compositions for IR optical applications.
- To compare the properties of these glasses with existing IR optical materials.
Main Methods:
- Literature review of qualitative evaluations of various glass systems.
- Preparation of specific chalcogenide glass compositions for quantitative property assessment.
- Discussion of fabrication methods and associated challenges.
Main Results:
- Compilation of qualitative evaluation results for numerous chalcogenide glass systems.
- Quantitative data on optical and physical properties for selected compositions.
- Comparison of chalcogenide glass parameters against other IR optical materials.
Conclusions:
- Chalcogenide glasses present viable alternatives for IR optical applications.
- Fabrication methods require further optimization for large-scale production.
- Further research is needed to fully characterize and exploit these materials.
Related Concept Videos
Infrared (IR) Spectroscopy: Overview
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
Different compounds display unique properties due to their...
Oxidation of Phenols to Quinones
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...
Oxidative Cleavage of Alkenes: Ozonolysis
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
IR and UV–Vis Spectroscopy of Aldehydes and Ketones
Infrared spectroscopy, also known as vibrational spectroscopy, is mainly used to determine the types of bonds and functional groups in molecules. In aldehydes and ketones, the carbonyl (C=O) bond shows an absorption around 1710 cm-1. The C=O bond vibration of an aldehyde occurs at lower frequencies than that of a ketone. In addition to the C=O absorption in an aldehyde, the aldehydic C–H bond also gives two peaks in the 2700–2800 cm-1 range. This absorption, coupled with the C=O stretching, is...
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.

