11-01 :: December 2010 / January 2011
nanotimes News in Brief
57
research will be needed before such applications can be realized. Erik Roeling, Wijnand Germs, Barry Smalbrugge, Erik Jan Geluk, Tjibbe de Vries, René Janssen en Martijn Kemerink: Organic electronic ratchets doing work, In: Nature Materi- als AOP, December 12, 2010, DOI:10.1038/NMAT2922:
http://dx.doi.org/10.1038/NMAT2922
http://www.youtube.com/watch?v=xExKoELgDXo
Erik Roeling (left) of Eindhoven University of Technology demonstrates the concept of ratchets with marbles. On the right: Martijn Kemerink.© Bart van Overbeeke
At the Photonics West 2011 trade fair in San Fran- cisco, German Fraunhofer researchers are now introducing a quick and efficient production system: their VarioS microscanner construction kit. This shrinks the costs and waiting times from order to delivery to just a few weeks.
are positioned asymmetrically below the channel of the transistor. Under the influence of the alternating voltage the electrons were able to make small steps in one direction, but not in the other – the same principle as a ratchet or pawl wheel. This move- ment of electrons is comparable to shaking marbles on a washboard – these also show a net movement in one direction.
The researchers have included their finding in a logic circuit. In their test setup the ratchet was found to provide sufficient energy to power the circuit.
According to the researchers the finding is a first step on the way to a new method for wireless po- wering of microelectronic devices with a low energy consumption – for example identification tags, im- planted ICs or sensors. However substantial further
Va rioS, © IPMS
Microscanners are micro-electro-mechanical sy- stems (MEMS), special chips with a tiny tilting mirror etched into the surface. The mirror is ex- cited into motion. If light strikes the mirror, it can be deflected, permitting it to scan a surface. With
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95