Discussion Overview
The discussion revolves around the experimental determination of the band structure of rhodamine B, utilizing its absorption spectrum. Participants explore various methods and techniques that could be employed in a laboratory setting.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- Hans Lindroth expresses difficulty in determining the band structure of rhodamine B experimentally using its absorption spectrum.
- One participant inquires whether Hans has crystals of rhodamine B or if it is being used as a marker in another material.
- Another suggestion is to heat the substance and observe its emission spectra, questioning Hans's access to a lab or physics department.
- A participant proposes using a synchrotron light source to perform X-ray absorption spectroscopy (XAS) to extract the band structure.
- Another method mentioned is electron energy loss spectroscopy (EELS), noting that it can be performed on a scanning electron microscope (SEM), but it may only provide elemental decomposition.
Areas of Agreement / Disagreement
Participants present multiple competing methods for determining the band structure, and there is no consensus on the best approach. The discussion remains unresolved regarding the most effective technique.
Contextual Notes
Some methods suggested depend on specific laboratory equipment and conditions, which may not be universally accessible. The effectiveness of each proposed technique in relation to rhodamine B's properties is not fully explored.
. Just go to a synchrotron light source and perform an XAS measurement. From that you can extract the band structure.