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Single walled carbon nanotubes

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Single-walled carbon nanotubes are cylindrical structures composed of a single layer of carbon atoms. They exhibit unique physical and chemical properties, including high electrical and thermal conductivity, as well as exceptional mechanical strength. These nanotubes are produced using various methods and can be used in a range of scientific and technological applications.

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5 protocols using single walled carbon nanotubes

1

Conductive Polyester Fiber Fabrication

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Fibers based on commercial polyester threads were prepared. Off-the-shelf polyester threads (Joann Fabrics and Crafts) were coated with conductive ink without any additional chemical treatment. To prepare the conductive ink, regioregular poly(3-hexylthiophene) (rr-P3HT, 98% purity) was purchased from American Dye Source, Inc. (Montreal, QC, Canada) and single-walled carbon nanotubes (SWCNTs ≥95% carbon basis ≥99%, 0.84 nm average diameter) were purchased from Sigma Aldrich (St. Louis, MS, USA), and the SWCNTs were added to the rr-P3HT solution in CHCl3, as previously described [43 (link)]. The resulting mixture was ultrahigh sonicated using a Microson Ultrasonic Cell Disruptor for 30 min in an ice bath to avoid overheating and undesirable secondary reactions. A dipping and drying technique was utilized to stain the polyester fibers with the conductive ink. The process was repeated ten times per ECF. After staining, the fibers were oven dried for 15 min at 100 °C.
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2

Fabrication and Characterization of PLA-based Nanocomposites

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l,d-Poly(lactic acid) (l,d-PLA) was used as received from Galactic. 4′-Pentyl-4-biphenylcarbonitrile (5CB), and single-walled carbon nanotubes (SWCN) were used as received from Sigma-Aldrich (Saint Louis, Missouri, USA). The SWCN used had an average diameter of 0.84 nm, a median length of 1 μm, and ≥95% carbon basis (≥99% as carbon nanotubes). Chloroform (98.5%) was used as received from POCH. Hydrochloric acid and sodium hydroxide were used as received from STANLAB.
l,d-PLA: FT-IR [cm−1]: 2995 m νas(CH3), 2965 sh ν(CH3), 2944 m νs(CH3), 2879 w, 2861 w, 1748 s ν(C<svg xmlns="http://www.w3.org/2000/svg" version="1.0" width="13.200000pt" height="16.000000pt" viewBox="0 0 13.200000 16.000000" preserveAspectRatio="xMidYMid meet"><metadata>
Created by potrace 1.16, written by Peter Selinger 2001-2019
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O), 1722 sh, 1453 m δas(CH3), 1382 m δs(CH3), 1360 m δs(CH3), 1302 w, br δ(CH), 1268 m ν(C–O), 1209 sh, 1180 s νs(C–O–C), 1127 s ν(C–O), 1081 s νas(C–O–C), 1043 s ν(C–O), 1020 sh, 956 w, 919 w, 896 w, 869 m ν(C–C), 847 sh, 754 m ν(C–C), 735 sh, 706 br, 669, (s – strong, m – medium, w – weak, br – broad, sh – shoulder).25 (link)
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3

Selective Ion-Sensing Electrochemical Sensor

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Selectophore grade sodium ionophore X, bis(2-ethylehexyl) sebacate (DOS), sodium tetrakis[3,5-bis(trifluoromethyl)phenyl] borate (Na-TFPB), high-molecular-weight polyvinyl chloride (PVC), tetrahydrofuran, valinomycin (potassium ionophore), sodium tetraphenylborate (NaTPB), cyclohexanone, polyvinyl butyral resin BUTVAR B-98 (PVB), sodium chloride (NaCl), 3,4-ethylenedioxythiophene (EDOT), poly(sodium 4-styrenesulfonate) (NaPSS), glucose oxidase (from Aspergillus niger), chitosan, single-walled carbon nanotubes, iron (III) chloride, potassium ferricyanide (III), multiwall carbon nanotubes and block polymer PEO-PPO-PEO (F127) were obtained from Sigma Aldrich. L-lactate oxidase (>80 activity units per milligram) was procured from Toyobo Corp. and PBS (pH 7.2) was obtained from Life Technologies. Moisture-resistant 100-μm-thick PET was purchased from McMaster-Carr.
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4

Synthesis and Characterization of Polymeric Nanocomposites

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Methyl methacrylate (MMA), 2-ethylhexyl acrylate (2-EHA), nbutyl acrylate (nBA), single-walled carbon nanotubes (SWCNTs), bisphenol A (BPA), methanol, acetonitrile (ACN), PVC, o-nitrophenyl octyl ether (o-NPOE), benzene, tridodecylmethylammonium chloride (TDMAC) and tetradodecylammonium tetrakis(4chlorophenyl)borate (ETH 500) were purchased from Sigma. Methacrylic acid (MAA), divinylbenzene 80 (DVB 80), 2,2 0 -azobis(isobutyronitrile) (AIBN), acetic acid, tetrahydrofuran (THF), phenol, catechol, 3-nitrophenol and dichloromethane (DCM) were obtained from Fluka. All other reagents were analytical grade and used without any further purification. Aqueous solutions were prepared with freshly deionized water (18.2 MU cm specific resistance) obtained with a Pall Cascada laboratory water system.
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5

Analytical Workflow for Urine and Blood Metabolites

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2-aminothiazoline-4-carboxylic acid (ATCA) was purchased from Chem-Impex International (Wood Dale, IL). The internal standard, 2-aminothiazoline-4-carboxylic acid-13C, 15N (ATCA-13C, 15N), was obtained from Toronto Research Chemical, Inc. (North York, Canada). N-methyl-N-trimethylsilyl-trifluoroacetoamide (MSTFA), single-walled carbon nanotubes (0.7 – 1.3 nm in diameter and 1 μm in length), multi-walled carbon nanotubes (110 – 170 nm in diameter and 5 – 9 μm in length), carbon coated iron nanoparticles (25 nm average particle size), iron (II) chloride hexahydrate (FeCl3 · 6H2O), and iron (III) chloride tetrahydrate (FeCl2 · 4H2O) were purchased from Sigma-Aldrich (St. Louis, MO). Synthetic urine, Surine-, was obtained from Cerilliant (Round Rock, TX). Drug-free human urine was obtained commercially from UTAK Laboratories (Valencia, CA). Bovine blood was obtained from Quad Five (Ryegate, MT). The solvents, except for those used in the synthesis of Mag-CNT, were at least LCMS grade and all of the solvents were purchased from Sigma-Aldrich (St. Louis, MO) and Fisher Scientific (Hampton, NH). Deionized water was obtained from a Merck Millipore water purification system (Burlington, MA).
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