Structural characterizations of As–Se–Te glasses

Delaizir, Gaëlle; Dussauze, Marc; Nazabal, Virginie; Lecante, Pierre; Dollé, Mickaël; Rozier, Patrick; Kamitsos, E. I.; Jóvári, P.; Bureau, Bruno

doi:10.1016/j.jallcom.2010.09.104

Cited by 28 publications

(20 citation statements)

References 29 publications

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“…As already demonstrated in previous work, the substitution of selenium by tellurium induces a global right-shift of the entire spectrum of about 100ppm, leading to the disappearance of the Se-Se-Se bonds [18]. In addition, the spectrum of the milled powder 160 hours shows no difference with that obtained for the glass synthesized by melting / quenching [15]. The two curves show the same form attesting same structure regardless of the method of synthesis, mechanical milling or melt quenching.…”

Section: Structural Studysupporting

confidence: 69%

“…However, the shoulder at 238 cm -1 corresponds to selenium chains. As indicated by G. Delaizir et al [15], two peaks identified at 168 and 205 cm -1 correspond to the stretching of As-Te bonds and As-Se vibration. Moreover according to this paper, raman spectra of the TAS-MM160 and of the TAS base glass are identical demonstrating that the final powder (TASMM160h) has a very close structure as glass synthesized by melting / quenching.…”

Section: Structural Studymentioning

confidence: 80%

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Te-As-Se glass destabilization using high energy milling

Calvez

Lavanant

Anna

et al. 2018

Journal of Non-Crystalline Solids

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The Te 20 As 30 Se 50 (TAS) glass has been studied under the extreme conditions of high energy milling. Starting from the raw materials, an amorphization process occurs progressively reaching an unstable intermediate state and the final stable state then. Despite its high resistance against crystallization when made using silica tubes, an intermediate state is reached when mechanically alloyed into powder. The evolution of the glass structure has been investigated using Raman spectroscopy and MAS NMR of 77 Se according to the milling time. Optimized parameters and conditions to compact milled powders by Spark Plasma Sintering show the possibility to design infrared windows transparent from 2 to 20µm. A correlation to the thermo-mechanical properties of densified powder using hot pressing has been made.

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Section: Structural Studysupporting

confidence: 69%

Section: Structural Studymentioning

confidence: 80%

Te-As-Se glass destabilization using high energy milling

Calvez

Lavanant

Anna

et al. 2018

Journal of Non-Crystalline Solids

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“…Bulk glasses in the system As 30 Se 70−x Te x present an excess of Se and Te compared to the stoichiometric As 40 Se 60−x Te x compositions [29]. Thus, the interconnection of AsX 3/2 pyramidal units (with X being either Se or Te) should incorporate some Se-Se, Se-Te or Te-Te bonds.…”

Section: Structure Of As 30 Se 70−x Te X Bulk Glasses and As 30 Se 50mentioning

confidence: 99%

Aging process of photosensitive chalcogenide films deposited by electron beam deposition

Charpentier

Dussauze

Cathelinaud³

et al. 2011

Journal of Alloys and Compounds

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“…At this time, the best compromise is the Te 2 As 3 Se 5 glass composition, referred to as TAS glass. The structure of this glass is constituted of Se and Te chains rigidified by the introduction of trivalent arsenic atoms that reticulate the chains 29,30 . Thus, this glass is very stable thanks to its strong covalent bonds, and its thermo-mechanical properties allow an easy shaping into fiber (T g =137°C).…”

Section: Selenide Glass Optical Fibersmentioning

confidence: 99%

Selenide and telluride glasses for mid-infrared bio-sensing

Cui

Chahal²,

Shpotyuk³

et al. 2014

SPIE Proceedings

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Fiber Evanescent Wave Spectroscopy (FEWS) is an efficient way to collect optical spectra in situ, in real time and even, hopefully, in vivo. Thanks to selenide glass fibers, it is possible to get such spectra over the whole mid-infrared range from 2 to 12 µm. This working window gives access to the fundamental vibration band of most of biological molecules. Moreover selenide glasses are stable and easy to handle, and it is possible to shape the fiber and create a tapered sensing head to drastically increase the sensitivity. Within the past decades, numerous multi-disciplinary studies have been conducted in collaboration with the City Hospital of Rennes. Clinical trials have provided very promising results in biology and medicine which have led to the creation in 2011 of the DIAFIR Company dedicated to the commercialization of fiber-based infrared biosensors. In addition, new glasses based on tellurium only have been recently developed, initially in the framework of the Darwin mission led by the European Space Agency (ESA). These glasses transmit light further into the far-infrared and could also be very useful for medical applications in the near future. Indeed, they permit to reach the vibrational bands of biomolecules laying from 12 to 16 µm where selenide glasses do not transmit light anymore. However, while Se is a very good glass former, telluride glasses tend to crystallize easily due to the metallic nature of Te bonds. Hence, further work is under way to stabilize the glass composition for fibers drawing and to lower the optical losses for improving their sensitivity as bio-sensors.

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Structural characterizations of As–Se–Te glasses

Cited by 28 publications

References 29 publications

Te-As-Se glass destabilization using high energy milling

Te-As-Se glass destabilization using high energy milling

Aging process of photosensitive chalcogenide films deposited by electron beam deposition

Selenide and telluride glasses for mid-infrared bio-sensing

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