Bioelectronics EXCEEDED IN POWER AND CAPACITY conventional electronic devices. An ultrafast, low-cost ORGANIC RAM.
Researchers at the University of California at Los Angeles have created an organic memory, which is cheaper and faster than the one that is currently in use, and also stores information for a long time after the power is turned off.
The results of research conducted under the supervision of Professor Yang Yang of the Department of Materials Research at the School of Development and Applied Science them. Henry Samuel, will be presented at the International Conference on Synthetic Metals in Shanghai on June 29.
According to Young, these devices have great potential for use in personal computers, digital cameras and other electronic devices, because of their lighter weight and faster response speed. This memory is of 3 million times faster than a conventional random access memory and its production is cheaper.
Memory arranged in three layers. The base layer of the metal film is in the middle between the layers of organic films. This package is connected to the two electrodes.
A positive voltage is applied to activate the device.
The information remains in the memory even after power off. In testing the device information in memory after a power failure persisted for several days to weeks. So that the device can be used for applications where it is important to store information that is in memory, but sometimes lost when a system failure or power failure. New memory of these problems does not.
Information from the memory effect when you turn on the power. This is equivalent to the erasing process.
Organic memory operates on the principle of electrical bistability - the phenomenon in which the object shows two states of different conductivity at the same voltage. Since the two layers are made of organic material and show electrical bistability new memory called organic bistable device (Organic Bistable Device (OBD)).
In addition to the ability to overwrite and save the information to the power failure, the usual operation of the apparatus as memory important for practical applications.
More than 3 million write-erase cycles were carried out on our OBD with good rewritable characteristics, Young said.
Electrical bistability in organic materials has been studied in the past and she is credited with different properties. The main difference of our OBD - the presence of the cast within the organic film metal layer, Young said.
In fact, the electric device bistability can be observed only when the metal layer has a certain critical thickness. When the thickness of the metal layer is too large, or the layer itself is generally not available, the bistability phenomenon disappears, Young said. The experiments were performed on metals: aluminum, silver, gold and copper.
However, the formula for the optimal composition of the central layer of the metal is still in the research stage.
Contact information:
David Brown, dbrown@ea.ucla.edu, 310-206-0540, University of California at Los Angeles
