I have four samples of alloys(CdSxSe1-x) containing selenium and sulfur in different proportions. When we examined it with SEM , the sulfur element value appeared negative in all samples, but by (EDS/EDAX) examination, sulfur appears as a sign, so what is the reason for that?
"When we examined it with SEM , the sulfur element value appeared negative in all samples...
What does this phrase mean? How was the presence/absence of sulfur established in a SEM image? Negative means: negative signal or no signal?
"but by (EDS/EDAX) examination, sulfur appears as a sign"
EDS is the method, EDAX is a brand of EDS devices. So, you did record EDS spectra showing the peaks of Cd and Se (other elements?), but no S signal?
What were the beam parameters (energy, current)? What is known about beam sensitivity of your material?
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