COOH (carboxyl) functionalization is produced by oxidative treatment of the MWCNT surface, typically with concentrated nitric acid or a mixed acid system. The result is carboxylic acid groups (-COOH) attached to the outer wall, primarily at defect sites and tube ends. COOH-MWCNTs are the most widely used functionalized grade: they disperse readily in water and polar solvents, can be further modified by amidation or esterification chemistry, and bond covalently to amine-containing polymers (epoxy curing agents, polyamides). Use COOH for aqueous dispersions, water-based inks, biomedical applications, conductive composites with amine-cured epoxies, and any chemistry that needs a starting handle for further modification. The COOH-functionalized MWCNT line spans all standard diameters.
Try patented Flexiphene solvent based nanomaterial emulsions today and put the power of graphene to work in your formulations. Flexiphene is amphiphilic, tune-able by pH, sheet size, and degree of reduction. Flexiphene is transforming the material world! Contact us Today to arrange for your Flexiphene Emulsions!To Buy Flexiphene emulsions, please contact us with the solvent, materials, amount, and loading ratio you need. CTI Material’s patented Flexiphene solvent based nanomaterial emulsions are just what you need to disperse nanomaterials into solvents. Flexiphene works with SWNTs, MWNTs, and many other nanomaterials. Flexiphene are amphiphilic, tunable surfactant sheets, highly soluble in many solvents and can make colloidal dispersions of nanomaterials, stable for weeks to months. We typically work with NMP, DMF, THF, Acetone, & Ethanol solvents however many more are possible. Please contact us today and let us know what materials you require, the loading ratios, and solvents and we can quote it for you. Note- Hazmat shipping fees may apply. Prices depend on materials used and loading ratios. Flexiphene solvent based nanomaterial emulsions are transforming the material world!
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Silver nanowire (AgNW) ink is the leading solution for transparent conductive electrodes (TCEs) that require both high conductivity and optical transparency. At loadings that achieve sheet resistance below 10 Ohm/sq, AgNW films maintain optical transmittance above 85% — performance that rivals ITO at a fraction of the cost and with far superior flexibility. Unlike ITO, silver nanowire electrodes do not crack under bending, making them essential for rollable displays and conformable biosensors. Cheap Tubes synthesizes 30 nm outer diameter silver nanowires in-house at our Vermont facility, giving us direct quality control over aspect ratio, concentration, and lot-to-lot consistency — shipped at 25 mg/mL in isopropanol (IPA). Cheap Tubes supplies silver nanowire ink for transparent electrode applications in touch screens, OPV, and flexible electronics. Both ink types are formulated for compatibility with screen printing, gravure, flexographic, and inkjet deposition methods. Silver nanowire ink is the choice when optical transparency is required alongside low sheet resistance.
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Try patented Flexiphene Surfactant Solutions today and put the power of graphene to work in your formulations. Flexiphene is amphiphilic and compatible with water, solvents, and many other host matrices. To Buy Flexiphene, please contact us with the amount and loading ratio you need. Standard concentration is 2mgs/ml. Flexiphene is transforming the material world! CTI Material’s patented Flexiphene aqueous nanomaterial emulsions are just what you need to disperse nanomaterials into aqueous solutions. Flexiphene works with SWNTs, MWNTs, GNPs, and many other nanomaterials. Flexiphene are amphiphilic, tunable surfactant sheets, highly soluble in many solvents and can make colloidal dispersions of nanomaterials, stable for weeks to months. We typically work with Di Water and can modify the solution if required. Please contact us today and let us know what materials you require, the loading ratios, and solvents and we can quote it for you. Prices depend on materials used and loading ratios. Flexiphene aqueous nanomaterial emulsions are transforming the material world!
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Amine | -NH₂ | Basic, highly water-dispersible; reacts with COOH, epoxides, aldehydes | Drug delivery, biosensors, crosslinked epoxy composites Amine (-NH2) groups are introduced via diamine coupling to -COOH and provide direct bonding to epoxy resins and conjugation chemistry to biomolecules via standard NHS/EDC coupling. -COOH and -NH2 functionalized MWCNTs are the standard substrates for biomolecule conjugation... use glutaraldehyde or NHS-PEG-NHS linkers between -NH2 surfaces and amine-bearing biomolecules. For dispersion in aqueous biological or analytical applications, -COOH and -NH₂ groups provide colloidal stability through electrostatic repulsion (high negative or positive zeta potential) without requiring surfactants that would need to be removed in downstream processing. This makes functionalized CNTs the preferred choice for drug delivery systems, biosensors, and diagnostic conjugation chemistry.
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