Table 2: Variables used in the model.

VariableExplanation

FreshBinary variable: 1 for fresh samples or otherwise 0
Si3N4, NH3, OH, CH3Binary variables for tip type: 1 for a specific tip type or otherwise 0. Tip type is 0 for COOH
SB4, SB5, SBS4, SBS5Binary variables for binder type: 1 for a specific binder type or otherwise 0
CNT%% of carbon nanotubes
SWNT (or CNT)Binary variable for CNT type: 1 for SWNT type and 0 for MWNT type