Carbon nanotube film testing service

Carbon Nanotube Film Testing Service for Global Electronics and Advanced Materials Markets

As an ISO/IEC 17025 accredited laboratory, we deliver a specialized carbon nanotube film testing service that verifies electrical conductivity, optical transparency, mechanical strength, thermal management, and chemical purity. Our carbon nanotube film testing service supports manufacturers and exporters of transparent conductive films, flexible electronics, EMI shielding materials, and energy storage components who must demonstrate conformity to IEC, ISO, ASTM, and regional advanced material standards across the European Union, North America, East Asia, and the Middle East. Every test is performed under our CNAS-accredited quality system, producing reports accepted by notified bodies, technology OEMs, and procurement teams worldwide.

Product Samples We Regularly Test in Our Carbon Nanotube Film Testing Service

Single-walled and multi-walled carbon nanotube transparent conductive films — for touch screens, OLED displays, and photovoltaic electrodes
Flexible CNT thin films on polymer substrates — for wearable electronics, flexible sensors, and e-paper
Carbon nanotube EMI shielding films and coatings — for aerospace, automotive, and 5G communication device shielding
CNT-based battery and supercapacitor electrode films — for lithium-ion, solid-state, and flexible energy storage
Carbon nanotube heating films and de-icing elements — for automotive mirrors, aircraft wings, and outdoor displays
CNT-polymer composite films and buckypaper — for structural health monitoring, actuators, and water purification
Patterned and printed carbon nanotube films — for transistors, integrated circuits, and bio-sensor platforms

Carbon Nanotube Film Testing Service for Electrical and Electro-Optical Performance

Sheet resistance and electrical uniformity by four-point probe per ASTM F390 and IEC 62899-202 — the DC sheet resistance of the CNT film is mapped across its surface to verify the specified ohms-per-square value and to detect any local variations that would cause display non-uniformity or resistive heating hot spots.
Optical transmittance and haze measurement per ASTM D1003 and ISO 14782 — the total and diffuse light transmittance of the carbon nanotube film are measured using a spectrophotometer with an integrating sphere to confirm the film meets the transparency requirement for display and photovoltaic window electrodes.
Electromagnetic interference shielding effectiveness per ASTM D4935 and IEEE 299 — the CNT film is tested in a coaxial holder or anechoic chamber to quantify the shielding effectiveness in decibels across the frequency range, verifying its ability to attenuate radiated emissions for electronic device compliance.
Work function and surface potential by Kelvin probe per ASTM E2716 and customer protocols — the surface work function of the carbon nanotube film is measured to assess its suitability as a hole injection or electron transport layer in organic and perovskite optoelectronic devices.
Electrochemical impedance spectroscopy and charge transfer resistance per internal and customer protocols — the film is immersed in an electrolyte and the Nyquist plot is recorded to evaluate its performance as a supercapacitor or battery electrode.

Carbon Nanotube Film Testing Service for Mechanical and Structural Integrity

Tensile strength, elongation at break, and Young's modulus per ASTM D882 and ISO 527-3 — the CNT film is pulled to failure in the machine and transverse directions to measure its mechanical robustness, ensuring the film withstands bending, rolling, and lamination processes without cracking.
Flexural endurance and folding radius test per IEC 62715-6-2 and customer protocols — the carbon nanotube film is repeatedly bent around a defined radius while the sheet resistance is monitored in situ to verify the electrical stability required for flexible and foldable electronic devices.
Adhesion and peel strength on polymer and glass substrates per ASTM D3359 and ISO 2409 — the bond between the CNT film and the substrate is tested by cross-cut tape test and peel measurement to ensure the film does not delaminate during device fabrication or service.
Nanoindentation hardness and reduced modulus per ISO 14577-1 — the near-surface mechanical properties of the carbon nanotube film are probed by nanoindentation to characterize the coating hardness and stiffness for scratch-resistant transparent electrodes.
Surface roughness and morphology by atomic force microscopy per ASTM E2530 — the nanoscale topography of the CNT film is imaged to verify the root-mean-square roughness meets the requirement for device layer planarization and to quantify the carbon nanotube bundle density.

Carbon Nanotube Film Testing Service for Thermal and Environmental Durability

In-plane thermal conductivity by laser flash or transient hot wire per ASTM E1461 and ISO 22007-4 — the thermal diffusivity of the carbon nanotube film is measured and combined with specific heat and density to calculate the thermal conductivity, a key parameter for thermal interface materials and heat spreading films.
Thermal cycling and thermal shock resistance per IEC 60068-2-14 and ASTM D4762 — the CNT film is cycled between -40 °C and +85 °C or higher, and the change in sheet resistance and adhesion is monitored to verify long-term stability under diurnal and seasonal temperature extremes.
Damp heat and humidity exposure per IEC 60068-2-78 — the carbon nanotube film is conditioned at 85 °C and 85 % relative humidity for extended periods, and the electrical and optical properties are remeasured to confirm resistance to moisture-induced degradation in tropical environments.
UV and xenon-arc accelerated weathering per ASTM G155 and ISO 4892-2 — the CNT film is exposed to simulated sunlight and rain cycles to evaluate any yellowing, embrittlement, or increase in sheet resistance after outdoor exposure.
Thermal stability and decomposition onset by thermogravimetric analysis per ASTM E1131 — the mass loss of the carbon nanotube film is recorded up to 1000 °C under nitrogen and air to quantify the CNT content, residual catalyst, and any functional group decomposition that limits the maximum service temperature.

Carbon Nanotube Film Testing Service for Chemical Purity and Composition

Raman spectroscopy for CNT quality, chirality, and defect density per internal validated protocols — the G-band to D-band intensity ratio is measured to assess the degree of structural order and the presence of defects in the carbon nanotube film, correlating with electrical and thermal transport properties.
Scanning electron microscopy and transmission electron microscopy per ASTM E1508 and ISO 29301 — the morphology, bundle size, and alignment of carbon nanotubes in the film are imaged at high magnification to verify the manufacturing process control and the film's nanostructure uniformity.
Elemental analysis and residual catalyst metal content by ICP-MS per ASTM E3061 — the CNT film is digested and the concentration of iron, nickel, cobalt, and molybdenum catalyst residues is quantified to confirm the purification level meets the specification for semiconductor and electronic device compatibility.
X-ray photoelectron spectroscopy for surface chemistry and functional group identification per ASTM E1078 — the elemental composition and chemical bonding states at the CNT film surface are determined to verify the degree of doping, oxidation, or functionalization required for the target application.
Volatile organic compound and outgassing analysis per ASTM E595 — for carbon nanotube films used in vacuum and space applications, the total mass loss and collected volatile condensable materials are measured to confirm low-outgassing characteristics.

Chemical Safety and Regulatory Compliance for Carbon Nanotube Films

RoHS compliance per IEC 62321 and EU Directive 2011/65/EU — quantitative screening for lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs in the CNT film, substrate, and any protective coatings to ensure the product meets global substance restrictions for electronic components.
REACH Annex XVII and SVHC screening — targeted analysis of Substances of Very High Concern, with particular attention to the carbon nanotube content itself and any residual solvent or processing aid that could be classified as a substance of concern.
Heavy metals in packaging per EU Directive 94/62/EC — verification that the sum concentration of lead, cadmium, mercury, and hexavalent chromium in the packaging materials used to protect the CNT film is below the 100 ppm regulatory limit.

Report Recognition and ISO/IEC 17025 Compliance

All test methods described in this carbon nanotube film testing service are covered by our ISO/IEC 17025 scope of accreditation. Our test reports are accepted by European notified bodies for electronic components and advanced materials, by North American display and semiconductor OEMs, and by regulatory and procurement authorities across Japan, Korea, and the Gulf region. Whether you require a complete qualification dossier for a new CNT transparent conductor, a batch release inspection for an incoming film shipment, or a root cause failure analysis of an electrode performance issue, our laboratory provides the measurement accuracy and nanomaterials expertise that the global carbon nanotube technology industry demands.