NOT KNOWN FACTUAL STATEMENTS ABOUT IR OPTICAL

 5a]. The absorption edge for samples VT400 and VT700 transpired at ~ 503 nm and ~ 470 nm. However, the transmittance reduced slightly with rising substrate temperature in the NIR spectra assortment, which can be attributed to the big particle measurement and lack of porosity for VT700. Figure 5b shows the reflectance spectra for each s