It is well understood that the bonding between Se and Te is weaker than the Se-Se bonds due to the catalytic effect of tellurium on the crystallization of selenium. Several workers [12–14] reported that tellurium-rich glasses have good transparency in the infrared and high refractive index, which makes these glasses important for optical devices also. Tellurium-rich glassy alloys of Se-Te are widely used for commercial, scientific, and technological purposes. Their application ranges from optical recording media to xerography

[15–17]. Khan et al. [18] studied the electrical and optical properties of thin films of a-Se x Te100-x system. They reported an indirect optical band gap and electrical transport via a thermally activated process in this system. Salah et al. [19] studied the thin films of polycrystalline Akt activator Te94Se6 nanoparticles. Further, they prepared

these nanoparticles at different working gas pressures and studied the pressure dependence of optical band gap in these nanoparticles. They reported that a direct optical band gap and the values of optical band gap are found to be pressure dependent. Salah et al. [20] deposited thin films composed of nanoparticles of polycrystalline Se x Te100-x and studied the optical properties of these nanoparticles. They reported a direct optical band gap in this system, and the values of optical band gap are found to be size and composition dependent. In

the present work, we have also studied a-Se x Te100-x system and produced aligned nanorods of this alloy. The optical and structural properties of CA4P purchase these well-aligned nanorods are studied. In our case, we found that these nanorods are aligned and their structure is completely amorphous. These amorphous nanorods show an enhanced and direct band gap as compared to the reported results on polycrystalline materials [19, 20]. These findings in the field of nanochalcogenide glasses will be interesting for applications in devices as these materials are cost-effective, and fabricating devices using these materials will also reduce the cost of devices. It is also important to understand the optical phenomenon in a-Se 17-DMAG (Alvespimycin) HCl x Te100-x nanorods as reduction in the size of the material (nanoscale) may result in a dramatic change in the properties. Keeping the above facts in view, it is therefore extremely important to study the properties of as-prepared a-Se x Te100-x aligned nanorods. Methods Thin films of a-Se x Te100-x were deposited using a rapid thermal evaporation technique. In this method, as-prepared alloys were evaporated in an argon gas environment. Thermal evaporation was modified to rapid thermal evaporation by constructing a small sub-evaporation chamber using a quartz tube that is 30 mm in diameter and 110 mm in length.