Morphological analysis of nanocrystalline SnO2 for gas sensor applications

The complete Raman spectrum of nanometric SnO2 particles

“…The nanoparticles calcinated at temperatures higher that 450°C are of good crystalline quality, deagglomerated and faceted. 10 In Sec. III A, the different characteristics of the Raman spectra are explained in detail as a function of grain size and disorder.…”

“…When the size of the SnO 2 crystal is reduced, the infrared spectrum is modified because the interaction between electromagnetic radiation and the particles depends on the crystal's size, shape, and state of aggregation. [8][9][10] Experiments using Raman spectroscopy have also reported spectrum modification, at least partially. Low frequency bands have been observed previously in SnO 2 , 11 and several authors have reported the existence of bands not observed in single-crystal or polycrystalline SnO 2 which have been found to be closely related to grain size.…”

Effect of Sintering Temperatures on the Synthesis of SnO2 Nanospheres

“…Tin oxide (SnO 2 ), a ntype semiconductor with a wide band gap (3.6 eV, at 300 K), is well known for its potential applications in gas sensors, dye sensitized solar cells, and transparent conducting electrodes and as a catalyst support [3,4]. Therefore, many processes have been proposed to synthesize SnO 2 nanostructures; some involve dry processes such as sputtering from tin oxide target [5] or from metallic target followed by oxidation [6] and chemical vapour deposition (CVD) [7], while others are based on wet processes, including spray pyrolysis [8] and sol-gel-related methods which have been used to prepare tin oxide coating, particles, and precipitates [9][10][11][12][13][14][15].…”

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

“…In recent decades tin oxide (SnO 2 ) has attracted great attention in many applications such as solar cells, gas sensors, liquid crystal displays, optoelectronic devices, etc., because of its excellent electrical and optical properties, high exciton binding energy of 130 meV at room temperature, wide band gap (3.6 eV) and, additionally, its high chemical and thermal stability [1][2][3][4]. Recently, it was reported that the nanosized SnO 2 is a promising candidate for the sensitive and long-term stable detection of pollutant gases [5].…”