diff --git a/Cantera/matlab/cantera/@ThermoPhase/electricPotential.m b/Cantera/matlab/cantera/@ThermoPhase/electricPotential.m
new file mode 100644
index 000000000..4d9d67df9
--- /dev/null
+++ b/Cantera/matlab/cantera/@ThermoPhase/electricPotential.m
@@ -0,0 +1,4 @@
+function v = electricPotential(a)
+% ELECTRICPOTENTIAL - the electric potential of the phase
+%
+v = thermo_get(a.tp_id,25);
diff --git a/Cantera/matlab/cantera/@ThermoPhase/setElectricPotential.m b/Cantera/matlab/cantera/@ThermoPhase/setElectricPotential.m
new file mode 100644
index 000000000..83a4ef6da
--- /dev/null
+++ b/Cantera/matlab/cantera/@ThermoPhase/setElectricPotential.m
@@ -0,0 +1,4 @@
+function a = setElectricPotential(a,phi)
+% SETELECTRICPOTENTIAL  Set the electric potential [V].
+%
+thermo_set(a.tp_id,2,phi);
\ No newline at end of file
diff --git a/Cantera/matlab/cantera/importEdge.m b/Cantera/matlab/cantera/importEdge.m
new file mode 100644
index 000000000..487978350
--- /dev/null
+++ b/Cantera/matlab/cantera/importEdge.m
@@ -0,0 +1,14 @@
+function s = importEdge(file, name, phase1, phase2, phase3, phase4)
+% IMPORTINTERFACE - import an interface
+%   
+if nargin == 3
+  s = Interface(file, name, phase1);
+elseif nargin == 4
+  s = Interface(file, name, phase1, phase2);   
+elseif nargin == 5
+  s = Interface(file, name, phase1, phase2, phase3);
+elseif nargin == 6
+  s = Interface(file, name, phase1, phase2, phase3, phase4);  
+else 
+  error('importEdge only supports 4 neighbor phases');
+end