Nano-structured crystalline Te films by laser gas-phase pyrolysis of dimethyl tellurium

IR laser-induced synthesis of nanostructured gemanium telluride in the gas phase

“…The relative molar amounts of the hydrocarbons (ethane (53-57%), methane (24-29%), ethene (13-16%), propane (3%)) are similar to those observed in the LPHP of (CH 3 ) 2 Te 30 and in the LPHP of (CH 3 ) 4 Ge, 31 which were shown to yield elemental tellurium and germanium. It is conceivable 30 -32 that both homogeneous decompositions occur as a sequence of splits of the M-C (M Te, Ge) bonds.…”

IR laser co-pyrolysis of (CH3)2Te and (CH3)4Sn: Gas-phase formation and deposition of nanostructured SnTe

“…15-35% and the relative amounts of the hydrocarbons -ethane (58-62%), methane (25-27%), ethene (8-13%), propane (4-5%) -do not change within this decomposition progress. We note that these amounts are virtually equal to those observed in the TEA CO 2 laser induced and SF 6 sensitized pyrolysis of dimethyl tellurium [12] and of tetramethyltin (ethane (64-65%), methane (21-22%), ethene (11%), propane (2%)).…”

“…Thermal homogeneous decomposition of tetramethyltin examined under wall-less conditions [13,14] and the LPHP of dimethyl tellurium [12] are known to take place as a sequence of splits of the M-C (M Te, Sn) bonds. The observed similar depletion rate of both compounds is in keeping with very similar dissociation energy of the C-Te (ca.…”

“…This could have been accounted for by a small formation of an organotin polymer, since the LPHP of tetramethyltin yields a solid whose EDX-SEM-derived stoichiometry is Sn 0.76-0.78 C 0.24-0.22 . We consider, however, that some carbon is also bonded to Te (see later) and that the Te-C bond may be formed during reactions between CH 3 Sn fragments and Te, since the LPHP of dimethyltellurium yields [12] pure Te films.…”

A solvothermal route to tellurium based thin films

“…One-dimensional (1D) nanostructured tellurium thin films are of particular interest because the optical and electrical properties of devices strongly depend on the thin film microstructures, due to their quantum confinement effect. In the past several decades, various techniques, including: the epitaxial growth of thin single crystalline tellurium films on NaCl (001) [5], decomposition of H 2 Te on PE foils [6], low energy cluster beam deposition (LECBD) [7], tellurium films by UV laser photolysis of tellurophene or dimethyl tellurium [8,9], electrochemical synthsis [10], laser-induced chemical vapour co-deposition process [11], laser gas-phase pyrolysis of dimethyl tellurium [12] and cathodic electrodeposition [13], have been exploited to prepare tellurium thin films. Compared to other methods, CBD method is simpler, without complicated operation, without high temperature, without costly equipments.…”