Julio Wilder’s Post

New Technique Enables Mass Production of Metal Nanowires. by Riko Seibo - Tokyo, Japan (SPX) Researchers at Nagoya University in Japan have developed a new method for producing metal nanowires (NWs) that could enable their mass production for next-generation electronics. The breakthrough technique addresses challenges in scaling up the production of pure metal NWs, making them more practical for use in advanced electronic devices, including circuits, LEDs, and solar cells. Their findings were published in the journal 'Science'. Until now, mass production of NWs has been hindered by difficulties in maintaining both quality and purity during scaling. Typically, NWs are created by transporting atoms in a gas phase state, but this process has proven particularly challenging for metals, limiting their use in electronic components. To address this issue, a team led by Yasuhiro Kimura from Nagoya University's Graduate School of Engineering employed a process called atomic diffusion, facilitated in a solid phase state and enhanced by ion beam irradiation, to create aluminum NWs from single crystals. Atomic diffusion, which involves atoms moving from high concentration areas to low concentration areas due to changes in stress and temperature, was key to this technique. The researchers used ion beams to irradiate crystal grains inside thin aluminum films, causing them to coarsen at the surface. This changed the stress distribution, directing the flow of atoms and creating a feedstock for NW growth. When heat was applied, atoms moved upward from the fine grains at the bottom to the coarser grains at the top, leading to the large-scale production of NWs. "We increased the density of aluminum NWs from 2x105 NWs per square cm to 180+ 105 per square cm," Kimura explained. "This achievement paves the way for bottom-up metal NW growth methods, which have so far been grown only accidentally and in small quantities. It can also be extended to other metals in principle." https://lnkd.in/dPe5WYYr

Never a dull moment in the world of technology! Researchers at Linköping University in Sweden have synthesized a single layer of gold items dubbed ‘goldene’. This single-atom thick material could play a pivotal role in the development of next-generation electronic components. To work around gold’s tendency of clustering together, researchers first sandwiched an atomic monolayer of silicon between layers of titanium carbide. Depositing gold on top of this sandwich helped gold atoms diffuse replacing silicon atoms. Thereafter the titanium carbide layers were etched off to create this one atom thick layer of gold. The use cases for goldene sheets, that are only 100 nanometers thick, hold great promise offering a unique opportunity to lower manufacturing costs, shipping costs, and ultimately creating ever-smaller electronics. Read on… #hitech #technology #innovation #electronics https://lnkd.in/gD_gHbSt

𝗔 𝗦𝗧𝗥𝗘𝗧𝗖𝗛𝗔𝗕𝗟𝗘 𝗔𝗡𝗗 𝗧𝗢𝗨𝗚𝗛 𝗚𝗥𝗔𝗣𝗛𝗘𝗡𝗘 𝗙𝗜𝗟𝗠 The pursuit of producing 𝗵𝗶𝗴𝗵-𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗴𝗿𝗮𝗽𝗵𝗲𝗻𝗲 𝗳𝗶𝗹𝗺𝘀 has aroused considerable attention due to their potential for practical applications. However, the development of 𝗲𝗹𝗮𝘀𝘁𝗶𝗰 𝗮𝗻𝗱 𝘁𝗼𝘂𝗴𝗵 𝗳𝗶𝗹𝗺𝘀 𝗿𝗲𝗺𝗮𝗶𝗻𝘀 𝗮 𝗰𝗵𝗮𝗹𝗹𝗲𝗻𝗴𝗲 since 𝘄𝗵𝗲𝗻 𝗴𝗿𝗮𝗽𝗵𝗲𝗻𝗲 𝗻𝗮𝗻𝗼𝗹𝗮𝘆𝗲𝗿𝘀 𝗮𝗿𝗲 𝗮𝘀𝘀𝗲𝗺𝗯𝗹𝗲𝗱 𝗶𝗻𝘁𝗼 𝗳𝗼𝗶𝗹𝘀, 𝘁𝗵𝗲𝘆 𝗮𝗿𝗲 𝗼𝗻𝗹𝘆 𝗵𝗲𝗹𝗱 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿 𝗯𝘆 𝗿𝗲𝗹𝗮𝘁𝗶𝘃𝗲𝗹𝘆 𝘄𝗲𝗮𝗸𝗲𝗿 𝗵𝘆𝗱𝗿𝗼𝗴𝗲𝗻 𝗯𝗼𝗻𝗱𝘀. To address this issue, researchers from 上海交通大学 Shanghai Jiao Tong University introduced a method to overcome this hurdle: 𝘁𝗵𝗲𝘆 𝗹𝗶𝗻𝗸𝗲𝗱 𝗴𝗿𝗮𝗽𝗵𝗲𝗻𝗲 𝗼𝘅𝗶𝗱𝗲 𝗻𝗮𝗻𝗼𝘀𝗵𝗲𝗲𝘁𝘀 𝗯𝘆 𝗶𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗻𝗴 𝘀𝘁𝗿𝗼𝗻𝗴𝗲𝗿 𝗺𝗲𝗰𝗵𝗮𝗻𝗶𝗰𝗮𝗹 𝗯𝗼𝗻𝗱𝘀 into the interlayer of GO nanosheets. The team used 𝗿𝗼𝘁𝗮𝘅𝗮𝗻𝗲, 𝗮 𝘁𝘆𝗽𝗲 𝗼𝗳 𝗺𝗲𝗰𝗵𝗮𝗻𝗶𝗰𝗮𝗹𝗹𝘆 𝗶𝗻𝘁𝗲𝗿𝗹𝗼𝗰𝗸𝗲𝗱 𝗺𝗼𝗹𝗲𝗰𝘂𝗹𝗲 𝘁𝗼 𝗯𝗿𝗶𝗱𝗴𝗲 𝗚𝗢 𝗻𝗮𝗻𝗼𝘀𝗵𝗲𝗲𝘁𝘀. ⏩ 𝗠𝗲𝘁𝗵𝗼𝗱 In particular, the team obtained GO film by vacuum filtration, then immersed in solution of rotaxane. Next, esterification reaction was triggered to form mechanically strong covalent ester bond between GO nanosheets and rotaxane. This allows for intramolecular motion, resulting in enhanced mechanical properties. The resulting graphene films, referred to as 𝗿𝗼𝘁𝗮𝘅𝗮𝗻𝗲-𝗯𝗿𝗶𝗱𝗴𝗲𝗱 𝗴𝗿𝗮𝗽𝗵𝗲𝗻𝗲 (𝗥𝗕𝗚) 𝗳𝗶𝗹𝗺𝘀, exhibited significantly 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗱 𝗺𝗲𝗰𝗵𝗮𝗻𝗶𝗰𝗮𝗹 𝗽𝗿𝗼𝗽𝗲𝗿𝘁𝗶𝗲𝘀 𝗰𝗼𝗺𝗽𝗮𝗿𝗲𝗱 𝘁𝗼 𝘁𝗿𝗮𝗱𝗶𝘁𝗶𝗼𝗻𝗮𝗹 𝗴𝗿𝗮𝗽𝗵𝗲𝗻𝗲 𝗳𝗶𝗹𝗺𝘀. 🚀 𝗜𝗺𝗽𝗮𝗰𝘁: The RBG films boast impressive metrics: 1️⃣ 𝗧𝗲𝗻𝘀𝗶𝗹𝗲 𝗦𝘁𝗿𝗲𝗻𝗴𝘁𝗵: 247.3 MPa (3.3x higher than traditional rGO films) 2️⃣ 𝗙𝗿𝗮𝗰𝘁𝘂𝗿𝗲 𝗦𝘁𝗿𝗮𝗶𝗻: 23.6% (2.3x higher) 3️⃣ 𝗧𝗼𝘂𝗴𝗵𝗻𝗲𝘀𝘀: 23.9 MJ/m³ (6.0x higher) Additionally, the films were able to maintain continuous operation of flexible electrodes even when 𝘀𝘁𝗿𝗲𝘁𝗰𝗵𝗲𝗱 𝘂𝗽 𝘁𝗼 𝟮𝟬%. Overall, the study highlights the potential of mechanical bonds in enhancing the mechanical properties of graphene films, which could lead to the development of 𝗵𝗶𝗴𝗵-𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗳𝗹𝗲𝘅𝗶𝗯𝗹𝗲 𝗲𝗹𝗲𝗰𝘁𝗿𝗼𝗻𝗶𝗰 𝗱𝗲𝘃𝗶𝗰𝗲𝘀 𝗮𝗻𝗱 𝗼𝘁𝗵𝗲𝗿 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝘄𝗵𝗲𝗿𝗲 𝗳𝗹𝗲𝘅𝗶𝗯𝗶𝗹𝗶𝘁𝘆 𝗮𝗻𝗱 𝗱𝘂𝗿𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗮𝗿𝗲 𝗰𝗿𝘂𝗰𝗶𝗮𝗹. #graphene Complete paper [Lin in the comment section]

Atomic diffusion technique could lead to mass production of metal nanowires. Mass production of metal nanowires possible by breakthrough technique Mass production of metal nanowires possible by breakthrough technique.Has created a new technique for growing the tiny metal nanowires (NWs) that are expected to be used in next-generation electronics. Their results suggest a way to mass produce pure metal NWs, which has until now limited their use. The new technique promises to enhance the efficiency of electronics production, including circuitry, LEDs, and solar cells. Mass production of NWs has been challenging because of the difficulties of scaling production while maintaining quality and purity. NWs are so small that they are made by transporting atoms, the smallest constituent of matter, typically in a gas phase state. However, that is difficult to do with metals, hindering the production of these important components of electronics. Used atomic diffusion in a solid phase state enhanced by ion beam irradiation to create aluminum NWs from single crystals. Atomic diffusion is a process by which atoms or molecules move from areas of high concentration to areas of low concentration, through stress state change under heat. Using ion beams, the crystal grains were irradiated inside the thin aluminum film to coarsen them at the surface layer. This caused changes in stress distribution, guiding atomic flow, and was used as a means of supplying mass atomic feedstocks for NW growth to specific locations. In practice, when heat was applied, there was an upward flow of atoms through the gradient from the fine grains on the bottom to the course ones on top, resulting in mass growth of NWs. "We increased the density of aluminum NWs from 2x105 NWs per square cm to 180×105 per square cm, "This achievement paves the way for bottom-up metal NW growth methods, which have so far been grown only accidentally and in small quantities. It can also be extended to other metals in principle." The resulting aluminum NWs are expected to be utilized as nanocomponents for sensing devices and optoelectronics due to their unique features, such as a large surface area, good mechanical properties derived from being made from single crystals, and their resistance to natural oxidation. "We realized mass growth of forest-like metallic NWs using only three key processes: thin film deposition on a substrate, ion beam irradiation, and heating," "Our technique solves the urgent need to establish mass production methods, especially in the production of high-performance nanodevices such as gas sensors, biomarkers, and optoelectronic components." #Atomicdiffusion #metal #nanowires #led #solarcells #electronics #atoms #matter

I'm happy to share that our research on "Strain and Electric Field Effects in MoS₂/WS₂ vdW Heterostructures" has been published in the Journal of Alloys and Compounds. We explored how strain and electric fields impact these 2D materials, which could lead to advancements in optoelectronic devices. Check out the full article here: https://lnkd.in/g749YJnr #Research #2DMaterials #Nanotechnology #Optoelectronics #Innovation #Science #MaterialScience

PhD position…work on design, fabrication and characterisation of new silicon carbide sensors

#GrapheneWafer Structure and Properties A graphene wafer consists of a thin layer of graphene deposited or synthesized on a substrate, such as silicon, silicon carbide (SiC), or copper. The process to create such a wafer involves either mechanical exfoliation (peeling off graphene layers from graphite), chemical vapor deposition (CVD), or epitaxial growth on SiC wafers. Graphene wafers combine the exceptional properties of graphene with the robustness and scalability of wafer-based processing. The most notable properties of graphene include: High Electrical Conductivity: Graphene's electron mobility at room temperature is approximately 200,000 cm²/V·s, making it far superior to traditional materials like silicon. Exceptional Strength: With a tensile strength of around 130 GPa, graphene is about 200 times stronger than steel, despite being extremely lightweight. High Thermal Conductivity: Graphene has a thermal conductivity of around 5000 W/m·K, making it ideal for heat dissipation applications in electronics. Transparency: Despite its conductive properties, graphene is nearly transparent, absorbing only 2.3% of visible light, making it suitable for optoelectronic applications. info@graphenerich.com More reading as follow: https://lnkd.in/g7jKCQ_y

Some cool developments out of Nagoya University.   Researchers discovered that heating gallium nitride (GaN) with metallic magnesium (Mg) forms a unique superlattice structure.   This marks the first time that 2D metal layers have been successfully inserted into a bulk semiconductor, unveiling new avenues in semiconductor doping and elastic strain engineering. The team found that a certain lattice match between GaN and Mg significantly reduces the energy needed to create this structure, leading to a substantial enhancement in the electrical conductivity of GaN through hole transport.   This is meaningful given GaN's role in high-power density and fast-operating frequency applications, such as LEDs, laser diodes, and power electronics. This not only improves the performance of GaN-based devices but also contributes to a more energy-efficient and carbon-neutral future.   #Semiconductors #GalliumNitride #GaN #MaterialsScience #Nanotechnology #Innovation #Research #EnergyEfficiency #CarbonNeutral #LEDs #PowerElectronics #TechNews #ScientificBreakthrough #NagoyaUniversity   https://lnkd.in/gDUDShP7

🚀 Explore How J-OCTA is Used for Nanotribology: Molecular simulations are becoming integral to the study of nanotribology, encompassing areas such as friction, wear, and fabrication at the nanometer scale. These simulations offer detailed insights into atomic and molecular interactions, allowing researchers to predict and control tribological properties with unparalleled precision. This breakthrough paves the way for innovative solutions in materials science, leading to the creation of more durable, efficient, and customized nanomaterials. Adopting these advanced simulation techniques is essential for advancing nanotechnology and developing the next generation of high-performance materials. Discover how J-OCTA can transform your materials research. Visit for more details: https://lnkd.in/g5VsMQmA 📧 Contact poshitha@dhioresearch.com for demos or more information. #Nanotribology #MolecularSimulations #Nanotechnology #MaterialsScience #ResearchAndDevelopment #Innovation #JOCTA #MaterialsEngineering #MolecularDynamics #JoctaSoftware #MaterialModeling #DhioResearchAndEngineeringPvtLtd

Vanadium Oxide based material design capable of controlling temperature at which converts from insulator to conductor; paves way for novel superconductors Most commonly encountered materials are either electrical conductors (such as copper or aluminium) or electrical insulators (such as plastic and paper). Correlated electron materials are such a class of materials which undergo an electronic transition from an insulator to a metal. However, these transitions work as a function of temperature making them less useful in devices such as an electronic switch that usually operate at a constant temperature (usually room temperature). Further, these transitions occur at a temperature that might not be relevant for room temperature operation. Scientists at IISc (India), in collaboration with scientists from Japan, Denmark and the United States have proposed a synthetic material design that enables them to control the temperature at which the transition occurs. https://lnkd.in/g8CbkXuC