- \item Electron gun and filament
- \item Electron gun control box
- \item ADC/DAC control box and data processing
- \end{itemize}
- \item Photographs vs Diagrams
- \begin{itemize}
- \item Prefer diagrams to photographs
- \item Especially for the ADC/DAC control box circuit. Because it looks like a horrible mess.
+ \item Images prepared by CMCA
+ \begin{itemize}
+ \item The secondary electron current is imaged. The secondary electron current due to an Si substrate alone is substracted.
+ \item This gives an idea of the spatial distribution of the density of Au deposited on the Si substrate
+ \item TODO: Learn exactly how they are related... can I assume intensity $\propto$ density?
+ \end{itemize}
+ \item Discuss the clear difference in structure
+ \begin{itemize}
+ \item Well defined regions (metallic nanoparticles) vs ``smoke'' like connected strands
+ \end{itemize}
+ \item Perform image fourier transforms
+ \begin{itemize}
+ \item Au-Bright shows a elliptical distribution of low frequencies; indicates a preferred orientation for the Au
+ \item Au-Black shows a wider, circular distribution of low frequencies, and significantly larger high frequencies
+ \item Phase plots appear random except for some sharp lines near the centre of the FFT image (not sure how to interpret yet)
+ \item Validity of the transforms?
+ \begin{itemize}
+ \item Error is introduced due to discontinuities in the periodic extension of the image
+ \item However, since the image is a region taken out of a periodically structured surface, these should be small
+ \item No window has been applied
+ \end{itemize}
+ \item Relation of image fourier transforms to theory?
+ \begin{itemize}
+ \item I would love to be able to do this, but may not have time to understand how to do it
+ \item Can at least give a numerical approximation of fourier transform of density distribution of electron gas
+ \item Surely this can be used somehow? Approximate the structure factor of system?
+ \item Predict plasmonic behaviour?
+ \end{itemize}
+ \end{itemize}