Conductive Materials for Electronic Devices

If You're Still Betting on Graphene Alone, You’re Already Behind. 1. MXenes – The Real Conductivity King Faster electron movement. Easier functionalization. Already winning in EMI shielding and radar stealth. 2. Basalt Fiber Composites – Nature’s Carbon Fiber Volcanic rock turned lightweight armor. Thermal stability, low cost, no waiting. 3. Carbon Nanotubes (CNTs) – The Battle-Tested Nano Titan Old tech, now matured. Reinforcing next-gen aircraft structures and conductive surfaces. 4. Nanocellulose – Sustainable Strength at Scale Bio-based. 8x stronger than steel per gram. Ideal for interiors and non-critical structures. 5. Boron Nitride Nanotubes (BNNTs) – The Silent Killer App Handles heat over 900°C. Radiation shield for space. Electrically insulating, thermally elite. Stop Chasing the Unicorn. Build the Zoo. The era of one-material-to-rule-them-all is over. The real innovators aren’t betting everything on graphene. They’re building hybrid stacks of high-performance materials, each custom-picked for its role. BUT… Graphene Isn’t Dead. It’s Just Finding Its Lane. By 2030, graphene might still dominate in three high-stakes areas: Thermal Management Unmatched conductivity makes it ideal for satellites, heat shields, hypersonics. Smart Skins & Multifunctional Coatings Ultra-thin, conductive, corrosion-resistant layers — sensors and shielding rolled into one. High-Performance Energy Storage When paired with silicon or sulfur, it powers the next wave of aerospace supercapacitors. The future isn’t graphene. It’s material orchestration. Smart aerospace innovation isn’t about betting on the most-hyped material. It’s about deploying the right material, at the right layer, for the right function. So yes, keep your eye on graphene. But don’t wait for it. Fly with what works now.

CAN ULTRATHIN NONCRYSTALLINE SEMIMETAL NIOBIUM PHOSPHIDE REPLACE COPPER? As computer chips continue to shrink and increase in complexity, the ultrathin metallic wires responsible for transmitting electrical signals are becoming a major limiting factor. Conventional metals like Copper become less effective conductors at extremely small dimensions, hindering the miniaturization, performance, and energy efficiency of nanoscale electronic devices. A recent study published in Science on January 3rd by Stanford researchers has shown that niobium phosphide (NbP) exhibits superior electrical conductivity compared to copper in films only a few atoms thick. These ultrathin NbP films can also be produced at temperatures compatible with existing chip manufacturing techniques. NbP is classified as a topological semimetal, its surfaces exhibit significantly higher conductivity than its interior. As NbP films become thinner, the bulk region decreases in size while the highly conductive surfaces remain relatively unchanged. This allows the surfaces to play a proportionally larger role in electrical conduction, resulting in an overall improvement in conductivity. The conductivity of conventional metals like Copper begins to degrade when their thickness falls below approximately 50 nanometers and electrical resistivity increases due to electron scattering at the surfaces, which limits their performance in nanoscale electronics. In contrast, Stanford group observed a unique decrease in resistivity with decreasing film thickness in NbP, a semimetal deposited at a relatively low temperature of 400°C. In films thinner than 5 nanometers, the room-temperature resistivity (approximately 34 microhm centimeters for 1.5-nanometer-thick NbP) is up to six times lower than that of bulk NbP films and also lower than conventional metals at comparable thicknesses (typically around 100 microhm centimeters). Although the NbP films are not fully crystalline, they exhibit local nanocrystalline, short-range order within an amorphous matrix that reduced effective resistivity results from conduction through surface channels, combined with high surface carrier density and adequate mobility as the film thickness diminishes. Although NbP films are a promising start, Eric Pop and his colleagues don’t expect them to suddenly replace copper in all computer chips – copper is still a better conductor in thicker films and wires. Whereas, NbP conductors demonstrate the potential for faster and more efficient signal transmission through extremely thin wires, leading in substantial energy savings when scaled across the vast number of chips used in large data centers responsible for storing and processing today's massive amounts of information. These findings and the fundamental understanding gained could enable the development of ultrathin, low-resistivity wires for nanoelectronics, overcoming the limitations of conventional metals. #https://lnkd.in/er6t2iT2

What if we could completely transform the manufacturing of backplane electronics in flat-panel displays (like the one you're looking at right now) using entirely different, recyclable materials without compromising performance? We've been excited about this result from my lab for nearly two years, it just took a while to get it published, but it came out today in Nature Electronics (press release linked in the first comment)! Ever since coming to Duke in 2014, I've been motivated by the potential of printed carbon nanotube thin-film transistors (TFTs). In the ensuing years, we did a lot to advance the performance, design, and process sustainability of these printed CNT-TFTs. However, realizing a technique for directly printing them with sufficiently small dimensions (e.g., channel lengths) to yield competitive performance with the state-of-the-art TFTs like metal-oxides and LTPS has been elusive .... until we harnessed this new capillary flow printing capability from Hummink! With no chemical treatments or other modifications to a substrate, we show that conductive traces can be printed with submicron (100's of nanometers) small gaps between them to serve as the TFT channel length. I see tremendous potential in these fully printed CNT-TFTs for use in driving displays as the backplane electronics. There is further work that needs to be done but SO much potential and I am hopeful that this result provides sufficient evidence to motivate others to support and/or join us in pursuing this further! Congrats to Brittany Smith and Faris Albarghouthi, Ph.D. for their excellent job driving this work, along with all of our coauthor collaborators, including from Hummink! #CNTs #flexibleelectronics #displays #duke #dukepratt https://lnkd.in/eveWz-_2

Antimony (Sb) plays important but specialized roles in the semiconductor industry, both as a dopant element and as a component in compound semiconductors. Below is a detailed overview by application category: ⸻ 🧭 1. Antimony as a Dopant in Silicon and Other Semiconductors Function: • Antimony is used as an n-type dopant in silicon (Si), germanium (Ge), and silicon carbide (SiC) semiconductors. Role: • In doping, antimony donates free electrons to the crystal lattice, increasing conductivity. • It is preferred over phosphorus or arsenic in certain high-power and high-voltage applications due to: • Lower diffusion rate in silicon (precise control of dopant profiles). • High thermal stability (less redistribution during high-temperature processing). Applications: • Power devices (IGBTs, MOSFETs) • Rectifiers and diodes • Bipolar junction transistors • Radiation-hardened electronics Materials: • Doped silicon wafers (Sb:Si) • Ion implantation sources (e.g., SbF₅, SbH₃) ⸻ ⚗️ 2. Antimony in Compound Semiconductors (a) III–V Antimonides Antimony forms a series of III–V semiconductors with elements like indium (In), gallium (Ga), and aluminum (Al). Compound Bandgap (eV) Key Applications InSb (Indium antimonide) 0.17 Infrared detectors, thermal imaging, Hall sensors GaSb (Gallium antimonide) 0.73 Infrared LEDs, laser diodes, photodetectors AlSb (Aluminum antimonide) 1.6 High-frequency transistors, heterostructures InGaSb, AlGaSb, InAsSb alloys Tunable (0.1–1.0) Mid-IR lasers, quantum cascade lasers, thermophotovoltaics Features: • Narrow bandgap materials: excellent for mid- to far-infrared (IR) devices. • High electron mobility (especially InSb): ideal for high-speed electronics and magnetoresistive sensors. • Used in heterostructures, quantum wells, and superlattices. ⸻ 💡 3. Antimony in Thermoelectrics • Antimony telluride (Sb₂Te₃) is a p-type thermoelectric material. • Used in Peltier coolers and power generation modules. • Related to topological insulator research and advanced semiconductor materials. ⸻ 🧱 4. Antimony in Optical and Phase-Change Materials • Ge₂Sb₂Te₅ (GST) and related alloys are used in: • Phase-change memory (PCM) (e.g., Intel Optane) • Optical data storage (DVD-RW, Blu-ray) • Sb helps control crystallization speed and stability, making it key for nonvolatile memory. ⸻ 🏭 5. Antimony-Containing Precursors and Chemicals Used in epitaxy and doping processes: • Trimethylantimony (TMSb) – MOVPE (metal-organic vapor phase epitaxy) precursor for GaSb, InSb, etc. • Antimony trichloride (SbCl₃) – used in some etching or deposition steps. • Antimony hydride (stibine, SbH₃) – gas source for ion implantation and epitaxial doping (handled with extreme care due to toxicity).

🔋✨𝐌𝐗𝐞𝐧𝐞𝐬 (𝐌ₙ₊₁𝐗ₙ𝐓ₓ): 𝐄𝐦𝐞𝐫𝐠𝐢𝐧𝐠 𝟐𝐃 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥𝐬 𝐟𝐨𝐫 𝐀𝐝𝐯𝐚𝐧𝐜𝐞𝐝 𝐋𝐢𝐭𝐡𝐢𝐮𝐦 𝐁𝐚𝐭𝐭𝐞𝐫𝐢𝐞𝐬🪫✨ MXenes (Mₙ₊₁XₙTₓ) — 2D transition metal carbides, nitrides, or carbonitrides — are rapidly evolving as key materials in lithium-based energy storage systems. Originally derived from MAX phases (Mₙ₊₁AXₙ) by selective A-layer etching (usually Al), MXenes exhibit metallic conductivity, hydrophilicity, and tunable surface terminations (–O, –F, –OH). These features enable fast electron transport, efficient Li⁺ intercalation, and mechanically adaptive interfaces, making MXenes ideal candidates for high-performance Li-ion and solid-state batteries. ⸻ 🔋 1. Anode Materials • Ti₃C₂Tₓ MXene shows reversible Li⁺ storage with high rate capability due to its layered structure and excellent conductivity (~10⁴ S/cm). • Hybrid systems such as Si@Ti₃C₂Tₓ or SnO₂/Ti₃C₂Tₓ effectively buffer volume expansion and maintain SEI integrity. (Ref: Naguib et al., Adv. Mater., 2014; Liu et al., Nano Energy, 2020) ⸻ ⚙️ 2. Conductive Additives and Scaffolds • Nb₂C and Mo₂TiC₂Tₓ MXenes provide percolated, flexible networks that outperform conventional carbon-based conductive agents. • These networks enhance both electron transport and electrode structural stability under repeated cycling. (Ref: Anasori et al., Nat. Rev. Mater., 2017) ⸻ 🔬 3. Solid-State Interface Engineering • MXene interlayers reduce interfacial impedance and improve Li⁺ flux uniformity between solid electrolytes (e.g., LLZO, LPS) and electrodes. • Ti₃C₂Tₓ coatings suppress Li dendrite formation and enhance interfacial wetting in sulfide-based solid-state cells. (Ref: Li et al., Energy Environ. Sci., 2021) ⸻ 🧪 4. Surface Functionalization and Stability • Surface modification with –O or –OH groups improves Li⁺ adsorption and oxidation resistance. • Ongoing studies focus on fluoride-free synthesis and MXene-polymer composites to prevent degradation during processing. (Ref: Gogotsi & Anasori, ACS Nano, 2019) ⸻ 🔮 Scope and Outlook MXenes offer a tunable platform bridging conductive 2D nanostructures with functional electrochemical interfaces. The challenges ahead — oxidation control, scalable synthesis, and long-term interface stability — define the next step toward their commercialization in Li-based batteries. With over 40+ known MXene compositions, this field is poised to play a central role in the design of fast-charging, high-energy, and durable Li-ion and solid-state systems. #MXene #LithiumBattery #SolidStateBattery #Electrochemistry #BatteryMaterials #MaterialsScience #Ti3C2Tx #EnergyStorage

A New type of Material called CNT (Carbon nanotube ) can replace COPPER from motors completely increasing conductivity by 130% ! Researchers are exploring copper-less electric motors, a radical shift that could reshape EV and industrial motor design. Key highlights: • Scientists at the Korea Institute of Science and Technology developed a copper-free motor using carbon nanotube (CNT) conductors. • CNT wiring is up to 5× lighter than copper, potentially reducing motor weight significantly in EVs and aerospace systems. • A new fabrication technique aligns nanotubes to increase electrical conductivity by ~130%, improving power transmission. • Early prototypes successfully powered a small vehicle using just 2–3V and ~3.5W, proving feasibility. • Eliminating copper could lower material costs, reduce mining dependence, and cut manufacturing emissions in the electrification era. If scaled, copper-less motors could redefine EV powertrains, robotics, and aviation electrification. #ElectricMotors #EVTechnology #CarbonNanotubes #FutureOfMobility #DeepTech #Innovation #EnergyTransition

China just bent the rules of electronics — literally. Facinating? Chinese and global researchers are advancing Metal-Polymer Conductors (MPCs) — circuits made from liquid metals like gallium–indium embedded in elastic polymers — that defy traditional rigid wiring by remaining conductive even when stretched up to 500% or more. Why this is a big deal: 🔹 High Stretchability: Certain liquid-metal conductors maintain electrical conductivity even when stretched 5× their original length. 🔹 Durability: Printable metal-polymer conductors can withstand over 10,000 cycles of stretching with minimal resistance change (<3%). 🔹 Conductivity: Hybrid conductors based on indium alloys can achieve extremely high conductivity (~2.98 × 10⁶ S/m) with minimal resistance change under extreme strain. 🔹 Fine Feature Sizes: Advanced techniques can pattern circuits as small as 5 micrometers, rivaling conventional PCBs. Market Insight: The global market for wearable and flexible devices is expected to surge into the hundreds of billions of dollars, with advanced stretchable materials at the core of the next wave of innovation. (Wearable tech projected >US$150B by 2026 in soft electronics growth — wearable industry data) Where AI Fits In: AI is not just hype — it’s accelerating how we design and discover materials like MPCs. AI/ML models help predict material properties — like conductivity and mechanical resilience — before physical prototypes are made. Computational simulations can evaluate thousands of polymer + metal combinations far faster than physical testing alone. AI-assisted optimization reduces lab iterations, cutting time and cost in early-stage development. In other words: AI + materials science = faster discovery of smarter, stretchable electronics. Potential Applications: Soft robotics that mimic human motion Wearables that feel like fabric Artificial skin with embedded sensing Health monitoring devices that conform to the body On-skin motion recognition and bioelectronics. The era of electronics you can twist, stretch, and wear is here — and AI is helping make it a reality. #FlexibleElectronics #MaterialsScience #AIinInnovation #SoftRobotics #WearableTech #DeepTech #FutureOfElectronics #Innovation

PEDOT is the most successful conducting polymer on the market, found in applications from flexible electronics to bioelectronics and antistatic coatings. But what if we could make it 100 times more conductive and engineer its morphology into nanofibers with high surface area? This could be a game-changer for supercapacitors and energy storage, enabling faster charge/discharge cycles and greater efficiency. Other potential applications include wearable sensors, transparent electrodes, electrocatalysis, and next-gen neural interfaces. Proud to be part of this effort alongside an incredible team at UCLA Musibau Francis Jimoh Mackenzie Anderson, PhD Ric Kaner Check out this press release from UCLA describing our research here: 🔗 https://lnkd.in/gejXFSjp

Tunable Conductive Composite for Printed Sensors and Embedded Circuits. See our new open access article (https://lnkd.in/ejM9FAqX) recently published in Advanced Intelligent Systems. The tunable thermoplastic polyurethane (TPU)-based conductive composite filaments based approach, presented in this paper, could be used for development of either strain sensors or different circuit elements. The filaments were developed with two filler materials - silver and multiwalled carbon nanotubes (MWCNT). The influences of filler aspect ratio (AR), concentration, functionalization, and morphology on the composites’ mechanical, thermal, and electrical properties were studied. Printed tracks of the 10 wt% high-AR MWCNT/TPU filament exhibited a maximum electrical conductivity of 0.92 S/cm and withstand powers >1 W and currents >100 mA. The filament shows negligible change in impedance over the frequency range 1 kHz–1 MHz and a change in the resistance of <5% with 90° bending. Conversely, printed tracks using filaments with 3 wt% low-AR MWCNT exhibit a change in resistance of %30% with 90° bending, allowing a clear distinction between various bending angles, and thus showing potential for embedded strain/bend sensors. These results suggest that, with the correct optimization, multimaterial additive manufacturing can be utilized with tunable conductive filaments to fabricate complex 3D electronic systems by constructing reliable circuit tracks, bendable interconnects, and sensors. Congratulations Habib Nassar, PhD et al. Ravinder S. Dahiya Northeastern University Northeastern University College of Engineering Electrical & Computer Engineering Department, Northeastern University #sensors #electronics #additivemanufacturing #advancedmaterials #advancedmanufacturing #printedelectronics #flexibleelectronics #3dprinting #composites