Enhancing the Pressure-Sensitive Electrical Conductance of Self-Assembled Monolayers.

This suggests the presence of some defects in the SAMs, resulting in a reduced number of molecules per unit area and a larger molecular occupation area. A decreasing trend in molecular occupation area is observed with increasing alkyl chain length, which is expected because longer alkyl tails enhance the hydrophobic interaction forces between the tails, facilitating the alignment of molecules in a closely packed manner.

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