Date of download: 10/23/2017 Copyright © ASME. All rights reserved. From: Study of Insulating Properties of Alkanethiol Self-Assembled Monolayers Formed Under Prolonged Incubation Using Electrochemical Impedance Spectroscopy J. Nanotechnol. Eng. Med. 2013;3(3):031006-031006-8. doi:10.1115/1.4007698 Figure Legend: AFM measurement of bare gold substrate obtained in intermittent contact mode. The scan area shown is 1 μm by 1 μm.

Date of download: 10/23/2017 Copyright © ASME. All rights reserved. From: Study of Insulating Properties of Alkanethiol Self-Assembled Monolayers Formed Under Prolonged Incubation Using Electrochemical Impedance Spectroscopy J. Nanotechnol. Eng. Med. 2013;3(3):031006-031006-8. doi:10.1115/1.4007698 Figure Legend: Cyclic voltammograms of a bare polycrystalline gold surface scanned (▾) and an Au substrate with a “defect- free” thiol monolayer (▪), which was grown for 5 days. The supporting electrolyte used was 10 mM (I = 0.0316 M) phosphate buffer solution, pH 7, and scan rate 1 V s−1.

Date of download: 10/23/2017 Copyright © ASME. All rights reserved. From: Study of Insulating Properties of Alkanethiol Self-Assembled Monolayers Formed Under Prolonged Incubation Using Electrochemical Impedance Spectroscopy J. Nanotechnol. Eng. Med. 2013;3(3):031006-031006-8. doi:10.1115/1.4007698 Figure Legend: Plot of phase shift at 1 Hz from EIS measurements performed at voltages ranging from −0.3 V to 0.5 V (versus Ag/AgCl)

Date of download: 10/23/2017 Copyright © ASME. All rights reserved. From: Study of Insulating Properties of Alkanethiol Self-Assembled Monolayers Formed Under Prolonged Incubation Using Electrochemical Impedance Spectroscopy J. Nanotechnol. Eng. Med. 2013;3(3):031006-031006-8. doi:10.1115/1.4007698 Figure Legend: Plot of model data (CPE and α) obtained from fitting the EIS data for various incubation times. The dc potential was varied from −0.3 V (versus Ag/AgCl) to 0.5 V. For immersion times shorter than 120 h, the CPE model did not hold over the full dc potential range due to ion penetration.

Date of download: 10/23/2017 Copyright © ASME. All rights reserved. From: Study of Insulating Properties of Alkanethiol Self-Assembled Monolayers Formed Under Prolonged Incubation Using Electrochemical Impedance Spectroscopy J. Nanotechnol. Eng. Med. 2013;3(3):031006-031006-8. doi:10.1115/1.4007698 Figure Legend: Bode plot of undecanethiol applied at 0 V (versus Ag/AgCl) for different incubation times

Date of download: 10/23/2017 Copyright © ASME. All rights reserved. From: Study of Insulating Properties of Alkanethiol Self-Assembled Monolayers Formed Under Prolonged Incubation Using Electrochemical Impedance Spectroscopy J. Nanotechnol. Eng. Med. 2013;3(3):031006-031006-8. doi:10.1115/1.4007698 Figure Legend: Schematic of alkanethiolate SAM evolution on a gold surface over a range of incubation times

Date of download: 10/23/2017 Copyright © ASME. All rights reserved. From: Study of Insulating Properties of Alkanethiol Self-Assembled Monolayers Formed Under Prolonged Incubation Using Electrochemical Impedance Spectroscopy J. Nanotechnol. Eng. Med. 2013;3(3):031006-031006-8. doi:10.1115/1.4007698 Figure Legend: Equivalent circuits of the thiol monolayer: (a) CPE in series with a solution resistance, indicative of a “defect-free” SAM and (b) an equivalent Randle circuit of an SAM with potential induced defects

Date of download: 10/23/2017 Copyright © ASME. All rights reserved. From: Study of Insulating Properties of Alkanethiol Self-Assembled Monolayers Formed Under Prolonged Incubation Using Electrochemical Impedance Spectroscopy J. Nanotechnol. Eng. Med. 2013;3(3):031006-031006-8. doi:10.1115/1.4007698 Figure Legend: Phase angle plot of undecanethiol SAMs formed at different immersion times, with an applied potential of −0.2 V. The phase angle at low frequencies of the 48-h grown monolayer exhibits a phase angle less than −88 deg, for 1 mM and 10 mM concentrations. The substrate Agonafer 23 immersed in thiol solution for 5 days shows a phase angle of −88 deg, an indication of a monolayer without defects for 1 mM and 10 mM concentrations.