Journal: Chemical Science

Article Title: Electrosynthesis of molecular memory elements †

doi: 10.1039/d4sc08461f

Figure Lengend Snippet: The preparation and characterization of a thin film on an ITO electrode surface grown via an electrochemical grafting method. (a) Corresponding aryl diazonium salts were electrochemically reduced at the ITO working electrode surface, generating aryl radicals. Such reactive radicals form covalent bonds between molecules and ITO electrode surfaces, (b) an electrochemical grafting process was monitored by recording cyclic voltammograms (CVs) up to 30 scans in the potential range of 0 to −1 V ( vs. Ag/AgNO 3 ), (c) contact angle measurement was performed, by adding a drop of water (2 μL) on blank ITO, and (d) ITO/2, to evaluate the surface wettability changes on an ITO electrode surface before and after growing molecular films. On the blank ITO surface, an average contact angle of 89.5° was recorded, indicating a moderately hydrophilic surface. After the ITO underwent electrochemical grafting, the contact angle decreased significantly to an average of 57.85°, showing an increase in hydrophilicity due to the introduction of grafted molecules.

Article Snippet: The EIS data were fitted with the Randles circuit model using Metrohm electrochemical analyst software, where R MJ , R C , and CPE components correspond to the molecular layer resistance, contact resistance, and capacitance element of the MJ.

Techniques: