INDICATORS ON IR OPTICAL YOU SHOULD KNOW

 5a]. The absorption edge for samples VT400 and VT700 occurred at ~ 503 nm and ~ 470 nm. On the flip side, the transmittance lowered a little bit with rising substrate temperature in the NIR spectra variety, which may be attributed to the big particle dimensions and not enough porosity for VT700. Figure 5b displays the reflectance spect