Schematic diagram of the chemical structure of thiols investigated in this work: 1-hexadecanethiol (HDT), 16-mercaptohexadecanoic acid (MHDA), 11-mercaptoundecanoic acid (MUDA), 1-undecanethiol (UDT), 11-mercapto-1-undecanol (MUDO), and cysteamine (CYS).
Configuration of the attenuated total reflection measurements.
ATR-FTIR spectroscopy of a (001) GaAs reference sample obtained with a freshly cleaned Ge prism.
ATR-FTIR spectroscopy of SAMs of various length chain thiols on (001) GaAs: (a) , (b) , (c) , (d) , and (e) .
Schematic diagram illustrating the strength of the interaction between the dipolar moment of symmetrical methylene stretching vibration and the electric field vector of the evanescent wave at the GaAs-thiol interface.
Anticipated orientations of alkyl chains in SAMs of various thiols deposited on (001) GaAs.
Photoluminescence spectra of freshly etched (001) GaAs and samples covered with SAMs of different thiols.
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