NOT KNOWN FACTUAL STATEMENTS ABOUT IR OPTICAL

 5a]. The absorption edge for samples VT400 and VT700 transpired at ~ 503 nm and ~ 470 nm. Then again, the transmittance lowered marginally with growing substrate temperature in the NIR spectra range, which can be attributed to the big particle size and not enough porosity for VT700. Figure 5b displays the reflectance spectra for both e