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diff --git a/thesis/thesis.tex b/thesis/thesis.tex
index 6e546c0e..01c0a766 100644
--- a/thesis/thesis.tex
+++ b/thesis/thesis.tex
@@ -179,29 +179,10 @@ Summarise the literature, refer to past research etc
 			\end{itemize}
 		\end{enumerate}
 		\item Tamm and Shockley states arise from two extreme models (large change and small change respectively between bulk and surface). In reality, a combination of Tamm and Shockley states appear.
+		\item These states arise from termination of the lattice; but the surface cells are assumed undistorted
+		\item In reality surface cells are distorted by relaxation and reconstruction of the surface
 	\end{itemize}
 
-
-	\item Properties of surface region
-	\begin{itemize}
-		\item Difference between potential of surface and bulk
-		\begin{itemize}
-			\item Change between the two limits in the ``near-surface'' region
-		\end{itemize}
-		\item Theoretical models for the potential, 1D vs 3D
-		\begin{itemize}
-			\item Simplest case is a step potential.
-			\item Various improvements on this model, discussed in Komolov's book.
-			\begin{itemize}
-				\item Possibly adapt CQM project to model these potentials, if I get time
-			\end{itemize}
-		\end{itemize}
-		\item Limitations of theoretical models
-		\begin{itemize}
-			\item Real surface is not a step potential
-			\item Adsorption of foreign particles onto the surface also plays a large role in determining the electron spectrum.
-		\end{itemize}
-	\end{itemize}
 	\item Main reference: Komolov "Total Current Spectroscopy"
 	\item "Solid State Physics" textbooks and "Electron Spectroscopy" textbooks 
 \end{itemize}
@@ -269,10 +250,10 @@ I really think I should actually find plasmonic effects before writing too much
 
 \subsection{Total Current Spectroscopy}
 \begin{itemize}
-	\item Overview of technique
-
-	Total Current Spectroscopy (TCS)
-
+	\item 
+	\item Total Current Spectroscopy methods measure the total current of secondary electrons as a function of primary electron energy.
+	\item These methods are distinguished from ``differential'' methods (such as Auger electron spectroscopy and energy loss spectroscopy) which measure the secondary electron spectrum at a fixed primary electron energy.
+	\item 
 	\begin{itemize}
 		\item Low energy beam of electrons incident on sample
 		\item Measure slope of resulting I-V curve