The peak at ~350 nm is due to the ZnO nanorodes absorption edge
For all the films the absorption edge
lies in the UV region.
UV-VIS absorption spectroscopy yield an absorption edge
in the range 300-400 nm which corresponds to a band gap energy of 3.
66 eV (about 747 nm, red-shifted) with the recent experiment  of an absorption edge
observed at about 840 nm (about 1.
My data are spectra containing a big peak at the absorption edge
and a series of smaller "near-edge" peaks.
Each element shows different characteristic absorption edge
for their different electron-shell energies.
This is below the absorption edge
of Fe to avoid interference from background Fe fluorescence for elements (in our study, Mn) with an absorption edge
less than that of Fe and located close to the Fe absorption edge
In glasses prepared in Au crucibles, the absorption edge
is shifted to shorter wavelengths and the color of the glass is changed from red to yellowish, respectively.
Large real (f') and imaginary (f") contributions to the x-ray scattering factor arise at energies close to an elemental absorption edge
We work to overcome semiconductor shortcomings by working close to the absorption edge
[of the material]," Kost says.
For the ZnO film the percentage of transmittance in the visible region (390-800 nm) is about 80-87 % with a gradual fall near the fundamental absorption at 380 nm denotes the absorption edge
occurs in the UV region.
U], according to the idea that the sharp absorption edge
is enlarged by the electric fields produced by charged impurities; the third region describes the optical absorption generated by defects appearing at an energy lower than the optical gap; it is sensitive to the structural properties of the materials, being defined as the so-called Urbach tail, [E.