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fishead ...*∞º˙

Paper super-capacitors bring forth a future with electronics made of paper - 1 views

www.greenlaunches.com/...-electronics-made-of-paper.php

advanced materials paper super capacitors

shared by fishead ...*∞º˙ on 25 May 10 - Cached
  • Ever dreamt of a paper world with all your electronics made out of paper? You don’t need to be an origami fan to dream about things like that anymore. Paper electronics might just pop up in the future, thanks to the researches at Stanford University, who’ve come up with a technology to make this dream into a reality. Paper super capacitors have been stumbled upon by printing carbon nanotubes onto paper. These can be printed onto everything and involves the coating of both sides of a piece of paper with polyvinylidene fluoride (PVDF). The treated paper bonds to the super capacitor, just like ink and paper bonding and works efficiently, with minimal capacitance loss after 2500 charge-discharge cycles. If all goes well, the future might have electronic devices made of paper, that we can dispose of easily when out of use and recycle, keeping away the trouble of recycling e-waste that we face today.
fishead ...*∞º˙

Spasers set to sum: A new dawn for optical computing - tech - 25 January 2010 - New Sci... - 1 views

www.newscientist.com/...awn-for-optical-computing.html

advanced materials spasers

shared by fishead ...*∞º˙ on 25 Jan 10 - Cached
  • Dubbed a "spaser", this minuscule lasing object is the latest by-product of a buzzing field known as nanoplasmonics. Just as microelectronics exploits the behaviour of electrons in metals and semiconductors on micrometre scales, so nanoplasmonics is concerned with the nanoscale comings and goings of entities known as plasmons that lurk on and below the surfaces of metals. To envisage what as plasmon is, imagine a metal as a great sea of freely moving electrons. When light of the right frequency strikes the surface of the metal, it can set up a wavelike oscillation in this electron sea, just as the wind whips up waves on the ocean. These collective electron waves - plasmons - act to all intents and purposes as light waves trapped in the metal's surface. Their wavelengths depend on the metal, but are generally measured in nanometres. Their frequencies span the terahertz range - equivalent to the frequency range of light from the ultraviolet right through the visible to the infrared.
fishead ...*∞º˙

Graphene Defects Could Lead to Smaller Electronics | Gadget Lab | Wired.com - 0 views

www.wired.com/...ld-lead-to-smaller-electronics

advanced materials

shared by fishead ...*∞º˙ on 12 Apr 10 - Cached
  • Graphene could someday replace silicon as a semiconductor material and make our chips smaller and faster, except for one tiny detail: it’s been rather hard to mess with its electronic properties. Until now. “We have experimentally realized and theoretically investigated, for the first time, perfect atomic wires in graphene,” Ivan Oleynik, one of the two University of South Florida professors behind the discovery, told Wired.com. Atomic wires are short chains of atoms that conduct electricity and so far, they have been hard to achieve in graphene.
fishead ...*∞º˙

Rubber Material Harvests Energy from Small Movements - 1 views

ecogeek.org/...ests-energy-from-small-movemen

rubber movement electricity

shared by fishead ...*∞º˙ on 01 Feb 10 - Cached
  • fishead ...*∞º˙ on 01 Feb 10
     
    "pzt-rubber A new material developed by researchers at Princeton and Caltech is capable of harvesting energy from the simplest of movements like walking or breathing. This new rubber chip made of PZT (lead zirconate titanate) nanoribbons could eventually power small portable electronic devices like cell phones. The PZT is embedded in silicone rubber sheets that produce electricity when flexed or other pressure is applied. The scientists who developed the chip see them being inserted into shoes or even within the body to continually harness power for our portable devices. Before that freaks you out too much, the scientists envision the chips being placed next to the lungs to utilize breathing motions for powering pacemakers. Pacemaker users wouldn't have to undergo surgery to replace batteries since their breathing would be a constant source of energy. The reason this particular material stands out compared to all of the other piezoelectric materials out there is that it's far more efficient. According to the researchers, PZT can convert 80 percent of mechanical energy applied to it into electric energy, which is 100 times more efficient than quartz. That efficiency allows it to harness such small movements like breathing and opens up a much greater range of possibilities for its use."
fishead ...*∞º˙

Flexible Silicon Solar Cells Use 99% Less Material - 0 views

ecogeek.org/...lar-cells-use-99-less-material

advanced materials metal

shared by fishead ...*∞º˙ on 16 Feb 10 - Cached
  • Researchers have found a way to make flexible silicon solar cells using only 1 percent of the material used in conventional solar cells. The cells are made of micron-sized silicon wires that are encased in a flexible polymer that can be rolled or bent.  The researchers at Cal Tech who developed the cells eventually see them being used in clothing, but, for now, the cells could create cheaper and easier-to-install solar panels. Large consumer electronic companies like Sharp have experimented with organic thin-film solar cells, which are flexible, but they're less efficient than those made with silicon.  This breakthrough is the latest in a recent crop of studies combining the efficiency of silicon (about 15 to 20 percent efficiency) with the flexibility of the organic thin-film cells, but this one has the distinction of using only 1/100th of the amount of silicon per cell as a traditional silicon wafer. An added bonus to this type of solar cell is that existing manufacturing technology could be used to make them, further helping to keep cost down.
fishead ...*∞º˙

Make: Online : Plastic plywood substitute - 1 views

blog.makezine.com/...lastic_plywood_substitute.html

plastic

shared by fishead ...*∞º˙ on 22 Mar 10 - Cached
Kurt Laitner liked it
  • a "plywood replacement" panel material manufactured by British firm Environmental Recycling Technologies.
  • EcoSheet is manufactured from 75% recycled material, mostly waste electrical and electronic equipment, and can itself be recycled at the end of its useful life.
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