Magnetic-Field-Enhanced Morphology of Tin Oxide Nanomaterials for Gas Sensing Applications

Abstract

We studied the effect of an external magnetic field (up to 0.31 T) on the growth of SnO 2 nanowires fabricated using the horizontal vapor phase growth (HPVG) technique. The morphology of the nanowires was characterized by using scanning electron microscopy (SEM), and the chemical composition was characterized by energy dispersive X-ray (EDX) analysis. We found that the length of nanowires was significantly enhanced by the application of EMF. The aspect ratio, as well as the density of the fabricated nanowires, increased with increasing magnetic field intensity. Although the physics behind the morphology enhancement of the nanowires under magnetic field is still being investigated, nevertheless, we demonstrated that the magnetic field could be used as a key parameter to control the morphology of tin oxide nanomaterials grown via HPVG technique. The magnetically enhanced nanowires were used in the development of a gas sensor and were found to be sensitive to hydrogen sulfide gas and the headspace gas emitted by spoiling meat.

A standard method to synthesize Ag, Ag/Ge, Ag/TiO2, SnO2, and Ag/SnO2 nanomaterials using the HVPG technique

“…The magnetic field also reported that the length of nanowires is significantly changed. Using Hydrogen Sulfide gases to evaluate SnO 2 nanowire for meat spoilage application [22]. The study was done using 3 different curing times (4,6, and 8 h) with 1200 °C growth temperature.…”

Effect of Adding Essential Oils of Caraway and Rosemary on Volatile Aroma Compounds Derived from Stored Vacuum Packaged Minced Turkey Meat

“…The addition of essential oils also reduced the concentration of hexathiane and cyclic octaatomic sulfur in stored samples. The significant presence of these components was detected by GC-MS-SPME in spoiled pork by Briones et al (2017), who mentioned that these compounds are associated with the unpleasant odor in the samples of spoiled meat. However, it is difficult to assess the effect of EOs on the sensorially evaluated odor of the examined turkey meat since, for example, it is difficult to evaluate the contribution to the odor of those meat-derived compounds whose decrease in concentration was affected by these essential oils.…”

Synthesis and Characterization of Titanium Dioxide Nanomaterials via Horizontal Vapor Phase Growth (Hvpg) Technique

“…Distinct metal oxide nanomaterials were successfully fabricated through the said technique for sensor applications. For instance, iron oxide nanoparticles and zinc oxide nanomaterials and different nanostructures of tin oxide were fabricated successfully via HVPG for glucose detection [10] and gas sensing application [11,12,13], respectively. Moreover, this said technique was also used to produce the distinct nanocomposites for coating application including silver-titanium dioxide [14,15,16,17] and silver-graphene [18].…”