Raman spectroscopic studies of monoclinic Gallium Oxide ($\beta $-Ga$_{2}$O$_{3}$) Nanostructures: A comparison between nanowires vs. nanobelts

Nanostructures of monoclinic gallium oxide ($\beta $-Ga$_{2}$O$_{3})$, nanowires and nanobelts were synthesized via a very simple thermal evaporation process by using Ga metallic ignots and $\beta $-Ga$_{2}$O$_{3 }$powder as source materials for gallium and oxygen, respectively. The structural properties of the as grown nanostructures were characterized by using SEM, XRD and EDS. Raman studies were also performed for the grown nanostructures and Raman shifts were compared with the LDA calculated values of the peaks as well as with their bulk counterpart which exhibited good agreements with most of the peaks for both the nanostructures. In addition to this, there are some more Raman shifts which are the characteristics of the nanostructures as they have larger surface to volume ratio compared to their bulk counterparts.