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<p style=GROWING UP As mobile designers, we imagine a diverse, radical, sometimes perplexing set of futures; indeed, we have seen some examples in this chapter. Sometimes these futures are so radical, it feels that we will have to teleport to these new worlds, leaving everything we know behind. Of course, our technological future is not a place we leap to in time travel; it emerges from and is shaped by our past and current practices.

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The researchers used a layer-by-layer fabrication method to produce the new electrode material.

DW-03-08-F-S-215_Datasheet PDF

In this method a base material is alternately dipped in solutions containing carbon nanotubes that have been treated with simple organic compounds that give them either a positive or negative net charge. When these layers are alternated on a surface, they bond tightly together because of the complementary charges, making a stable and durable film.

In the new battery electrode, carbon nanotubes self-assemble” into a tightly bound structure.

The researchers report the energy output for a given weight of this new electrode material was shown to be five times greater than for conventional capacitors, and the total power delivery rate was 10 times that of lithium-ion batteries.

DW-03-08-F-S-215_Datasheet PDF

This performance can be attributed to good conduction of ions and electrons in the electrode, and efficient lithium storage on the surface of the nanotubes, say the researchers.

They also report that at high power output, the carbon nanotube electrodes showed very good stability over time. After 1,000 cycles of charging and discharging a test battery, there was no detectable change in the material’s performance.

DW-03-08-F-S-215_Datasheet PDF

The findings, by a team led by Associate Professor of Mechanical Engineering and Materials Science and Engineering Yang Shao-Horn, in collaboration with Bayer Chair Professor of Chemical Engineering Paula Hammond, are reported in a paper published June 20 in the journal Nature Nanotechnology.

Since the invention of the semiconductor-based transistor, designers have been putting in great efforts to create electronic musical instruments. Though such instruments may not be able to completely substitute for the natural instrument, electronic instruments are popular due to their portability, low maintenance, and ease of use – especially for new learners and the ability to produce sound effects that are not possible using natural instruments.

Connections between the conductive surfaces are made using conductive through-holes near the corners of the cavity. The resonant cavity couples with the metallic substrate to which it attached, though no direct connection is made between the tag and the substrate. The conformation of the folded elements on the free air face allows the center frequency of the tag to shift to maximize the response at the desired frequency.

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