Graphene EMI Shielding: >95% Shielding Effectiveness, Proven

Every powered circuit radiates electromagnetic energy, and every circuit sits in the electromagnetic environment created by its neighbors. As electronic systems grow denser, faster, and more wireless — more antennas, more switching, more components sharing less space — that environment becomes harder to control. Unwanted radio-frequency and electromagnetic interference can corrupt signals, degrade sensor readings, and cause sensitive equipment to behave unpredictably at exactly the moments it must not.

Shielding is the standard engineering answer: place a conductive barrier between the source of interference and whatever needs protecting, so that electromagnetic energy is blocked before it reaches vulnerable components. Conventional shielding has typically relied on metal — enclosures, foils, gaskets, and coatings. These approaches work, but they add mass and impose design constraints, and mass is often exactly what a modern electronics program is trying to remove.

That tension — the need for effective shielding on one side, the penalty of added metal on the other — is why engineers evaluate advanced materials for shielding at all. It is also where Rimere’s graphene has produced its most mature result to date.

Rimere is deliberate about the status it attaches to each material result. In the company’s own framing, more than 95% of EMI shielded is proven — the strongest status label Rimere attaches to a result. By comparison, +20% concrete strength is in active testing, and the company is demonstrating effective oil recovery, water treatment, and soil enhancement in application testing. For a buyer evaluating shielding materials, that distinction matters: the EMI shielding performance is not a projection or an early signal. It is the result Rimere stands furthest behind.

In Rimere’s application language: proven to shield radio-frequency and electromagnetic interference — a lightweight, high-performance alternative to conventional shielding for electronics and sensitive equipment.

The credibility behind that claim extends beyond Rimere itself. The company’s carbon is third-party verified by Intertek and ACS Materials, and tunable to specification. Intertek serves as Rimere’s third-party testing partner, and the company is backed by strategic investors including Clean Energy Fuels (NASDAQ: CLNE) and Bionatus.

Rimere’s graphene is R1H — carbon produced in a crumpled-sheet structure. It is one of two unique carbon categories the company is currently proving out: crumpled nano-sheets (R1H) and branched nano-spheres (R1L, carbon nano spheres), with new products in development. R1H has been imaged by both transmission and scanning electron microscopy, and what appears in those images is actual production material coming off Rimere’s system — not a one-off laboratory sample.

How it is made matters as much as what it is. Natural gas flows from the existing pipeline network into Rimere’s sequential plasma reactor, where high-energy plasma fields break the hydrocarbon bonds in the gas directly. Because the molecules are pulled apart rather than burned, no oxygen is consumed and no CO2 is formed. The outputs are solid carbon — built into graphene and custom nano-carbon structures to specification — and clean hydrogen, released as a zero-carbon fuel. For a closer look at the science of pulling molecules apart with plasma, see what plasma dissociation is and how it works.

For the engineer weighing shielding options, the appeal of graphene is straightforward: shielding performance without the mass of conventional metal solutions. Rimere positions its material exactly there — a lightweight, high-performance alternative to conventional shielding for electronics and sensitive equipment.

Wherever electronics must be protected and every gram is contested — portable and handheld devices, densely packed assemblies, sensitive instrumentation — a shielding material that is light, high-performing, and proven to shield more than 95% of EMI changes the trade space. Instead of designing around the weight and form-factor penalties of metal enclosures and gaskets, designers can evaluate a material class that carries its shielding performance at a fraction of the bulk.

R1H does not come from a process that happens to make one useful powder. It comes off Rimere’s proprietary sequential plasma process — protected by the company’s core IP portfolio — which controls molecular dissociation precisely enough to tune the carbon it produces. For a shielding program, that platform brings several properties worth understanding:

• Consistency from variable feedstock. The platform runs on real-world natural gas whatever its makeup — methane, ethane, heavier hydrocarbons, varying impurities and gas qualities. Variable gas in; the same high-value products out.
• Tunable to specification. The material can be adjusted toward an application’s requirements, rather than the application being redesigned around a fixed, take-it-or-leave-it powder.
• No mechanical changes between materials. Crumpled sheets and branched spheres come off the same system with no mechanical changes — plasma is programmable chemistry.
• Zero carbon footprint. Molecules are pulled apart rather than burned, so no oxygen is consumed and no CO2 is formed — and clean hydrogen is released as a zero-carbon fuel alongside the carbon.
• Existing infrastructure. The process draws on natural gas already flowing through the world’s pipelines. No new distribution network is required.

Rimere summarizes the platform simply: one platform, infinite materials. For shielding specifically, the significance is the pairing — a proven shielding result on one side, and a production process that can keep tuning the material on the other.

Rimere is transparent about where it stands: the material is third-party verified, tunable to specification, and scaling toward commercial availability, with ACS Material as the company’s global distribution partner. Buyers evaluating shielding materials today are engaging a platform on its way to scale — with its flagship shielding result already proven.

Because Rimere produces carbon to specification, the most productive starting point is the application itself: what needs shielding, in what form, and under what constraints. To understand how Rimere works with buyers on specified materials — from requirements through third-party verification — see how Rimere supplies custom graphene to specification. From there, the path is a direct conversation with the Rimere team about your shielding requirements.