Fabrication and characterization of wire-like SnO₂

Abstract

Wire-like SnO 2 is fabricated by the wet chemical method. X-ray diffraction measurements show that the obtained samples have rutile-type structure. Electron transmission microscopy experiments illustrate that the wire-like SnO 2 ranged from 10 to 50 nm in width and several microns (µm) in length. The high-resolution TEM indicates that SnO 2 wires are single crystals. The possible growth mechanism is proposed, and it is found that polyethylene glycol plays an important role in obtaining the wire-like and nano-rods morphology of SnO 2 . The band gap is determined to be 3.56 eV. Two photoluminescence peaks located at 389 and 470 nm are observed. Our fabrication method promises a simple way of synthesizing wire-like SnO 2 at a low temperature of 350 • C.

Variation in luminescence and bandgap of Zn-doped SnO2 nanoparticles with thermal decomposition

“…This reconciles that the A 1g mode is sensitive to the grain size and shifts to lower wave numbers with decreasing grain sizes along with its modes B 2g and E g approach A 1g . That is B 2g decreases and E g increases with decreasing grain sizes [19,20]. Intensity and position of S 1 and S 2 are dependent on size of the particles and as particle size increase both intensity and position of S 1 and S 2 decreases [20].…”

Microwave Irradiation Effect on Structural, Optical, and Thermal Properties of Cadmium Oxide Nanostructure

“…F (R) is directly proportional to the absorbance therefore; F (R) values were converted to the linear absorption coecient by means of the α = absorbance/t = F (R)/t relation, where t is the thickness of the lm. The curve of [F (R)hν/t] 1/2 vs. hν for the CdO samples A, B, and C was plotted [26] as shown in Fig. 4.…”

Structural evolution of SnO2 nanostructure from core–shell faceted pyramids to nanorods and its gas-sensing properties

“…It is assumed that the long-chain PAA directs the aggregation of colloidal particles and leads to subsequent crystallization. Liu et al [29] achieved nanowire like morphology by employing polyethylene glycol (PEG) as structuredirecting agent. The PEG polymer acts as heterogeneous nucleation sites at the polymer/water interface.…”