Structural properties of pulsed laser deposited SnOx thin films

Surface-enhanced Raman scattering of SnO2bulk material and colloidal solutions

“…Taking into account that the E g mode originated by the vibration of two oxygen atoms along the c axis, but in opposite direction, such a mode is more sensitive to oxygen vacancies than the other modes: the broad bump observed at around 500 cm −1 for E g mode proves this point. As reported in a previous work 20 , all the PLD deposited films are composed of nanoparticles exceeding 10 nm in size and essentially with a tetragonal rutile crystalline structure. From the analysis of SAED patterns, it was shown that the tetragonal unit cell shrinks along both the principal axes when the compositional parameter x gets smaller, i.e.…”

“…Hence we are reasonably confident that, for the sub-stoichiometric film, the appearance of the new peak near the A 1g mode and the marked enhancement of the E g one may be due in part to the surface defect states which easily linked with the A g ones. On the other hand, for the x= 2.2 stoichiometry sample, the well defined and skrinked features around 600 cm −1 and the TEM imaging analysis 20 suggest that the observation of such vibrational mode is not due to the presence of structural defects. The investigation was extended to systems con- sisting of SnO 2 colloidal solutions prepared by different methods.…”

“…Further details on the experimental procedures and films properties were reported elsewhere. [18][19][20] . SnO 2 water colloidal solutions were prepared following two different procedures: 1) by irradiating an high purity metallic tin target, immersed in distilled water, with the second harmonic of a Nd:YAG laser (wavelength 532 nm, pulse width 5 ns, repetition rate 10 Hz) at the laser fluence of 1.0 Jcm −2 , for typical irradiation times of 20 min; 2) dispersing 1.5 mg of SnO 2 micrometric sized powder in 6 mL of pure water.…”

Hydrothermal synthesis of Ti oxide nanostructures and TiO2:SnO2 heterostructures applied to the photodegradation of rhodamine B

“…The small peak at 2q z 27 (indicated by #) in some patterns may be attributed to the presence of a low content of rutile TiO 2 (according to JCPDS 21-1276) from the commercial TiO 2 precursor, which has a low content of rutile phase. In TS1 and TS2, there are peaks attributed to the presence of an Sn oxide, probably cassiterite SnO 2 (according to JCPDS 41-1445), although the peak at 2q z 30 could also indicate the presence of SnO [14]. Indeed, the exact phase of the Sn oxide could not be determined in Fig.…”

Nanocrystalline Au:Ag:SnO2 films prepared by pulsed magnetron sputtering

“…[6][7][8][9]. The nanocrystalline films and metal doped SnO 2 films have been synthesized by various approaches, such as atmospheric pressure chemical vapor deposition [10], electron beam evaporation [11], pulsed laser deposition [12], sol-gel [9], sputtering [8,13], and electrostatic spray deposition [14]. Among these techniques, pulsed magnetron sputtering has recently become a very popular method of thin film deposition, due to its versatility, high stability, controllability, repeatability and ability to provide uniform coatings over large areas substrate up to 4 m in width [15,16].…”