Short Single-walled Carbon Nanotubes, OD 1-2 nm,, length 1-3um, purity >60%

This material may generate aerosolized respirable fibers if disturbed, requiring containment during handling. Aggregation behavior varies with surface energy and can alter effective aspect ratio in dispersion.

• Aerosol containment: Handle only in a well-ventilated fume hood or glovebox to prevent inhalation of airborne particulates.
• Environmental sensitivity: Moisture uptake can promote bundling and reduce dispersibility in non-aqueous solvents.
• Electrostatic discharge risk: Dry powder form can accumulate static charge, requiring grounded containers and antistatic tools during transfer.

These steps assume use of a tip sonicator inside a fume hood with the powder contained prior to wetting. Proper probe immersion and pulse settings minimize tube breakage and solvent heating.

Required Equipment: Tip sonicator with tapered microtip (3 mm diameter), Glass scintillation vial or round-bottom flask with septum, Tared stainless steel spatula, Antistatic grounding wrist strap

1. Weigh powder under inert atmosphere
   Transfer the required mass of AF-SWCNT-S11 into the vial inside a glovebox or under a gentle argon stream to avoid moisture adsorption.
2. Close vial before removing from glovebox
   Seal the vial with a PTFE-lined cap immediately after weighing to prevent airborne contamination and static loss.
3. Add solvent and pre-wet the powder
   Inject degassed solvent through the septum or quickly add it under fume hood conditions, then swirl gently until no dry powder remains on the walls.
4. Sonicate using pulsed mode
   Submerge the sonicator tip 5 mm below the liquid surface and sonicate at 30% amplitude, 10 s on / 5 s off, for a total of 5 minutes of on-time.
5. Cool the dispersion in an ice bath
   Place the vial in an ice-water bath during sonication and allow static cooling for 2 minutes after the last pulse to prevent thermal degradation.

This short single-walled carbon nanotube material (OD 1-2 nm, length 1-3 µm, purity >60%) is evaluated for research applications requiring small-diameter, high-aspect-ratio nanocarbon for dispersion, composite, electrode, or conductivity workflows. The specified dimensional range and moderate purity level define its suitability for exploratory formulation rather than high-purity device integration.

Positive

• Small outer diameter range: The 1-2 nm outer diameter provides a high surface-to-volume ratio and strong quantum confinement effects, advantageous for nanoscale dispersion and composite reinforcement studies.
• Short length for processing: The 1-3 µm length facilitates easier dispersion in solvents and polymer matrices compared to longer nanotubes, reducing sonication time and aggregation risk in laboratory formulations.

Trade-offs

• Moderate purity constraint: Purity >60% indicates the presence of amorphous carbon and catalyst residues, which may interfere with electronic or electrochemical measurements and require additional purification steps for sensitive applications.
• Handling and dispersion sensitivity: Single-walled carbon nanotubes at this aspect ratio are prone to bundling and require optimized surfactant or solvent systems to achieve stable dispersions, increasing process development time.

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