Far-infrared absorption spectra and properties of SnO2 nanorods

Abstract

Gray-colored materials synthesized by calcining the precursor powders, which were produced in a microemulsion, are identified to be rutile structured SnO2 nanorods 20–45 nm in diameter and several micrometers in length by x-ray diffraction, transmission with electron microscopy, and high-resolution transmission microscopy. Conspicuous far-infrared (FIR) absorption spectrum platform peaks with widths of up to 61.6 and 119 cm−1 are observed, and are explained as the overlap of the surface modes of cylindrical and spheroid particles. Good agreement is achieved between FIR platform peaks and calculated results.

Electrodynamic properties of aqueous spray-deposited SnO2:F films for infrared plasmonics

“…This is not due to the known IR-active phonon bands of SnO 2 (three of E u type and one of A 2u ), which fall in the wavelength range 14 to 41 μm. [38][39][40][41] Note particularly the broad peak in ε 0 0 at ∼9.4 μm, which is similar to the well-known 9-μm absorption band in silicates. 42 This band becomes weaker with increasing [F].…”

Synthesis of Monodisperse Walnut‐Like SnO2 Spheres and Their Photocatalytic Performances

“…According to some previous studies [32][33][34], the peak at 334 cm −1 may be related to the surface defects or the SnO 2 nanocluster formation, which constituted a new kind of vibration mode. The 209 cm −1 peak position is similar to the Eu(TO) mode observed in the IR spectra of crystalline SnO 2 [35,36]. The 679 cm −1 peaks and the 541 cm −1 peak correspond to the A 2u mode [37,38] and inactive B 1u mode [39], respectively.…”

Large-scale synthesis of Ga2O3 nanoribbons by a two-step gas flow control

“…For example, 1D nanoscaled materials play an important role in testing and understanding fundamental concepts such as the role of dimensionality and size in optical, electrical, mechanical, and magnetic properties [1][2][3][4][5][6][7][8]. However, the characterization of the physical properties of the 1D nanostructures, in particular from one single nanostructure, has proved to be extremely difficult due to the lack of effective means to manipulate nanoscaled materials.…”