US-based Avadain has developed a novel graphene type, which it brands as Large, Thin, Defect-Free (LTDF) graphene, which is meant to position graphene around high value applications, including three strategic use cases: reducing dependence on foreign-sourced critical minerals, strengthening rare-earth-free iron nitride (Fe₂₁₆N₂) permanent magnets, and improving heat dissipation in high-power electronics.
LTDF graphene, SEM image
Why LTDF graphene's physics are different
Avadain says that graphene's performance ceiling is set by three parameters acting together: flake size, layer count and defect density. Most commercial graphene falls short on at least one of these, which is why products marketed as "graphene" often behave more like graphite or amorphous carbon in practice.
Large Surface Area: Every flake boundary acts as a scattering point for electrons, phonons and mechanical load, so larger, continuous flakes translate into fewer interruptions and performance closer to graphene's intrinsic limits. Graphene nanoparticles sit at the opposite end of that spectrum: Avadain says its LTDF flakes run in the 25-100+ µm² range, roughly five orders of magnitude larger than the sub-micron nanoparticles sold by many graphene producers, which tend to clump and form discontinuous conductive pathways.
Layer count: Graphene's defining properties fade as layers stack up and the material starts to behave like graphite. Many commercial "graphene" products are actually multilayer nanoplatelets, ranging from roughly 11 to over 100 layers. As ACS Material notes, nanoplatelets retain "much of graphene's stiffness, conductivity, and impermeability" in composite form, but that is graphene-like behavior rather than true single- or few-layer graphene performance. Avadain reports its LTDF flakes average under 5 atomic layers and under 1 nm in thickness.
Graphite nanoplatelets (left) are tens to hundreds of atomic layers thick and rigid, making them brittle; LTDF graphene (right) is ultra-thin and flexible.
Source: Avadain.
Defect density: Holes, cracks and chemical residues introduced during synthesis or processing act as additional scattering centers, which is part of why graphene oxide - despite being easy to produce at scale - underperforms on conductivity and thermal stability unless it undergoes further reduction processing. Avadain says its electrochemical exfoliation process yields flakes that are large, thin and nearly defect-free simultaneously, rather than trading one property for another.
Application 1: reducing dependence on critical minerals
Several governments, including the US, UK, EU, Australia, Canada, Japan and South Korea, have designated minerals such as copper, cobalt, nickel, titanium, niobium, scandium and vanadium as critical to national security and industrial policy, given their concentrated and often foreign-controlled supply chains. Avadain positions LTDF graphene as a way to ease that dependence through three mechanisms: direct substitution in applications where conductivity, strength or corrosion resistance is what actually matters; intensity reduction, where less of a critical mineral is needed once graphene improves a system's efficiency; and performance amplification, where graphene boosts the effectiveness of the critical mineral that remains in use, lowering the tonnage required for the same output.
Application 2: rare-earth-free Fe₂₁₆N₂ permanent magnets
High-performance permanent magnets typically rely on neodymium and dysprosium, both rare earth elements with supply chains dominated by a small number of producers. Iron nitride (Fe₂₁₆N₂) magnets are a rare-earth-free alternative under active research, but have historically struggled with phase stability, heat sensitivity and grain alignment. Avadain says LTDF graphene can act as a continuous 2D scaffold within Fe₂₁₆N₂ structures - conducting away heat to limit thermal demagnetization, aligning Fe-N grains to improve magnetic strength, stabilizing the crystal microstructure and reducing the defects that degrade coercivity. By contrast, smaller and more defective graphene flakes tend to behave as inert fillers that don't meaningfully influence grain orientation or thermal behavior. If borne out, Avadain suggests this could bring Fe₂₁₆N₂ magnets closer to the performance of some rare-earth magnets without relying on imported rare earth elements - though this remains an application under development rather than a shipping product.
Application 3: cooler, more efficient high-power electronics
Thermal management is a persistent bottleneck for high-power electronics, where overheating cuts efficiency, shortens component lifespan and drives up cooling costs. Graphene is frequently proposed as a thermal interface solution, but Avadain argues most commercial graphene products underdeliver here for the same reasons outlined above: flakes that are too small create thermal bottlenecks, multilayer stacks trap heat, defects scatter phonons, and restacked flakes end up behaving like ordinary graphite. The company reports that even ultra-low loadings of LTDF graphene produce large jumps in thermal conductivity relative to other commercial graphene materials, which could translate into lower operating temperatures, higher power density, smaller cooling systems and longer device lifetimes for power electronics.
Outlook
Avadain's case for LTDF graphene rests on treating flake size, thinness and defect density as a combined physical regime rather than three separate specifications - and arguing that hitting all three simultaneously, at scale, is what has been missing from commercial graphene for demanding applications to date. Avadain plans to license its technology to chemical companies instead of making LTDF graphene itself. The company's licensing agreement with Harcros Chemicals is an early test of whether that combination can move from lab-scale demonstration to industrial-volume production. As with any early-stage materials claim, independent, third-party validation of performance in each of these three application areas - critical mineral reduction, Iron Nitride magnets and power electronics thermal management - will be the next thing to watch.