Growth of crystalline phase in amorphous solid and liquid SSe₂₀

The Meyer–Neldel rule for dc activation processes in mixed isoelectronic chalcogens systems

“…Measurements of σ in the liquid phase (T > T m ) were carried out under vacuum (10 − 5 Torr) and at dark; T m is the melting temperature. Details of the conductivity measurements for liquids are given elsewhere [20].…”

Fusarium oxysporum, a bio-Factory for Nano Selenium Compounds: Synthesis and Characterization

“…The peaks marked with an asterisk had the strongest Bragg's re ection, which revealed the closest match with SeS, SeS 2 , and Se according to standard JCPDS cards 00-002-0320, 00-047-1481, and 00-042-1425, respectively. Addition of S to Se led to a drop in Se crystallization [7]. The presence of 3-5 at.% sulfur in selenium structure could reduce the rate of selenium crystallization [8].…”

“…The conventional way of selenium sul de production is chemical synthesis by fusing pure elements of sulfur and selenium at 350 C inside a vacuum Pyrex tube [7] or by heating of sulfur and selenium at 280 C for 2 h and cooling at 18-20 C [8]. Recently, a growing interest in Nano Particle (NP) biogenesis has appeared as a green technology to decrease the high cost and harmful sides of conventional chemical synthesis.…”

Electrical transport and structural properties of Se−Te semiconductors

“…In this equation ~(t) is the fraction transformed in time t, K is a temperature-dependent rate constant and defines the erystallization tate, and n is ah exponent which need not be ah integer [19,20]. The two kinetic parameters K and n have been calculated using the authors' previous procedure described elsewhere [12].…”

“…Also, the crystallizing kinetic parameters of supercooled liquid Se--Te alloys are studied in detail. This has been done by eonsidering the dc conductivity at any intermediate point during the liquid--crystalline transition as a struetural eharacteristic quantity fora material containing two phases, liquid and crystalline [12].…”