E (KCl, 99 ), acetone (99.7 ), ethanol hydrochloric (99.8 ), potassium ferricyanide (K3[Fe(CN) ], 99 ), lead standard (1000 mg L-1), and (99.eight ), potassium ferricyanide (K3 [Fe(CN)66], 99 ), lead common (1000 mg L-1 ), and acetonitrile acetonitrile (99 ) have been purchased from Sigma-Aldrich and applied asas received. EMBedpurchased from Sigma-Aldrich and applied received. EMBed-812 resin was bought from Electron Microscopy Sciences and following the 812 resin was purchased from Electron MicroscopySciences and mixed following the manufacturer’s instructions. manufacturer’s guidelines.2.two. Carbon Nanotube Fiber Cross-Section Preparation and Bonding to Metal two.2. Carbon Nanotube Fiber Cross-Section Preparation and Bonding to Metal To position adequate CNTs orthogonal for the substrates, we employed aligned CNTs To position sufficient CNTs orthogonal for the substrates, we employed aligned CNTs assembled within a fiber section. Embedding or encapsulating sections of aligned CNTs assembled within a fiber section. Embedding or encapsulating sections of aligned CNTs within polymers permitted the fabrication of HD-CNT assemblies, which was accomplished inside polymers permitted the fabrication of HD-CNT assemblies, which was accomplished utilizing aa clear polymer (Embed-812) [58]. Ultramicrotoming ofpolymer-embedded CNT employing clear polymer (Embed-812) [58]. Ultramicrotoming of the the polymer-embedded fibers was Tavapadon Autophagy performed to createto develop open-ended HD-CNTs within a 40-m thick 1B), CNT fibers was performed open-ended HD-CNTs inside a 40- thick film (Figure film exactly where the CNTs passed CNTs passed via the an open finish on both sides of your film. A (Figure 1B), where the through the film and had film and had an open end on both sides scanning electron microscopy (SEM) image in the HD-CNT cross-section to get a single CNT in the film. A scanning electron microscopy (SEM) image on the HD-CNT cross-section for fiber is shownfiber is shown This course of action gave access togaveopen ends of open endswhile a single CNT in Figure 1C. in Figure 1C. This procedure the access towards the the CNTs in the limiting the reactions at their cross-sections, as published by ourpublished by our[35,58]. CNTs even though limiting the reactions at their cross-sections, as group elsewhere group Additionally, embedding within a polymer maintained polymer maintained the CNTs anda elsewhere [35,58]. Moreover, embedding inside a the CNTs in a vertical position in allowed practical manipulation, like applying stress to create intimate contact vertical position and allowed convenient manipulation, including applying stress to with metal surfaces for bonding. The open ends of the fiber cross-sections were treated develop intimate contact with metal surfaces for bonding. The open ends of the fiber crosswith HNO3 (2 M) at 70 C for 24 h for additional functionalization with the carboxylic groups.Appl. Sci. 2021, 11, x FOR PEER REVIEW4 ofAppl. Sci. 2021, 11,sections were treated with HNO3 (2 M) at 70 for 24 h for additional functionalization four of 15 with all the carboxylic groups. 2.3. Modification in the Metal Surface Cu and Pt from the sheets were 2.three. Modification metalMetal Surfacepolished with 600-grit silicon carbide paper followed by crystal polishing paper, sonicated in acetone for 30 min, and then washed with deionized Cu and Pt metal sheets were polished with 600-grit silicon carbide paper followed by water and isopropyl alcohol ahead of the electrochemical hemical reaction. For CNT u crystal polishing pap.
