Nanostructured Al-doped Zinc oxide (ZnO) thin¯lms were deposited on glass substrate by chemical bath deposition (CBD) using aqueous zinc nitrate solution and subjected for di®erent characterizations. E®ect of Al 3þ substitution on the properties of ZnO annealed at 400 C was studied by XRD and UV-Vis for structural studies, SEM and TEM for surface morphology and DC four probe resistivity measurements for electrical properties. Al 3þ substitution does not in°uence the morphology and well-known peaks related to wurtzite structure of ZnO. Electron microscopy (SEM and TEM) con¯rms rod shaped Al-doped ZnO nanocrystals with average width of 50 nm. The optical band gap determined by UV-Visible spectroscopy was found to be in the range 3.37 eV to 3.44 eV. An EPR spectrum of AZO reveals peak at g ¼ 1:96 is due to shallow donors Zn interstitial. The DC electrical resistivity measurements of Al-doped ZnO show a minimum resistivity of 3:77 Â 10 À2 -cm. Therefore, these samples have potential use in n-type window layer in optoelectronic devices, organic solar cells, photonic crystals, photodetectors, light emitting diodes (LEDs), gas sensors and chemical sensors.

An attempt has been made to characterize and to compare the structure, properties and mechanical behavior of popular Indian white wool fiber, black wool races and its blend. The XRD measurements reveal that Wool fibers of white, black wool races and blend are amorphous in nature. The amide-I band at 1700–1600 cm–1 is characteristic to the peptide C=O stretching reveals the information whether the carbonyl groups participate in the bonding and 1623 cm–1 for Amide-I band, which are characteristic peaks of wool fibers. In compare with pure wool fiber with its blend the additional peaks reflects at 1645 cm–1 for 1day and 1652 cm–1 which indicates the presence of Monoazo yellow in the fiber were identified using Fourier Transformation Infrared spectroscopy. The apparent diffusion coefficient is found to be 0.5122 × 10–7 cm2s–1 for monoazo diffused in wool and 0.5367 ×10–7 cm2s–1for monoazo diffused in blend. Hence these wool fibers and its blend can be used for textile fabrication.