Entries with tag rice university.

New Patterning Technique Enables Smaller Electronics

Rice University scientists have developed a new lithographic patterning method that allows fabrication of smaller 2D electronics. The process makes patterns for circuitry that includes a conductor and an insulator at a feature resolution of about 100 nanometers wide in atom-thick layers. The researchers, who used graphene and hexagonal boron nitride in their work, say their technique might eventually let designers make 2D devices with circuits only 20 or 30 nanometers wide. Scientists from Vanderbilt University, the US Oak Ridge National Laboratory, and electronics manufacturer Agilent Technologies contributed to the project, which the researchers published in Nature Nanotechnology. (EurekAlert)(Rice University)(Nature Nanotechnology)

Researchers Demonstrate Painted Lithium-Ion Battery

Rice University scientists have created a rechargeable lithium-ion battery with components that can be spray painted on a surface. They developed paints for each of the five layers of the battery: two current collectors, a cathode, an anode, and a polymer separator. The researchers then tested the paints’ adhesion by airbrushing them in layers on ceramic bathroom tiles, flexible polymers, glass, stainless steel, and a beer stein. They tested their concept by painting nine bathroom tiles and linking the resulting batteries to power LEDs for six hours. They then recharged it with a small solar cell. According to the scientists—who are refining their work and patenting the technology—the batteries should scale, could be designed as reconfigurable snap-together tiles, and could be used with solar cells and other technologies in energy-harvesting applications. Their work appears online in Scientific Reports. (Science Daily)(Rice University)(Scientific Reports)

Researchers Develop Bendable Substrate

Researchers have created a flexible substrate in which they embedded single-molecule-thick electronic components. The Gwangju Institute of Science and Technology, Seoul University, and Rice University scientists say their test polyimide substrate holds up to bending and twisting that would typically destroy other electronic devices. They created more than 500, 3-centimeter-square devices that connected through their terminals to a DC power source to determine whether they lost conductivity during the process of repeated bending. The researchers, who say there were no failures, note that they will continue their testing and that they hope their work will lead to a foldable cellular telephone. They published their work in Nature Nanotechnology. (PhysOrg)(Nature Nanotechnology)

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