Boffins build Flash-like chip from graphite
Pencilling in a new design
Scientists as Texas' Rice University have created a Flash-like non-volatile storage chip technology out of the same material used to put lead in your pencil.
Dubbed "graphitic memory", the technique involves placing sheets of graphite between electrodes. Put a specific voltage across the sheet and it cracks. You can use the crack to represent, say, a binary 1, the cracking process therefore being a write operation. If a higher voltage is applied to the sheet, the crack vanishes, so the cell enters a state that represents a binary 0.
Applying a lower voltage across the sheet allows you to detect whether it's cracked or not - in other words to read the memory cell's state.
The work was conducted by Rice chemistry professor James Tour, who revealed to MIT Tech Review that unlike other allotropes of carbon, such as the sheet-graphene or nanotubes, graphite is easy to deposit on silicon.
Since the cell is less complex than the transistors used to store data in Flash chips, graphitic memory could pave the way for cheaper storage too.
And more of it, since both the simplicity of the cell and its flat structure mean that it should be easy to layer cell upon cell to construct highly dense storage chips, Tour said.
The system operates at voltages lower than those used by Flash cells, he added, and graphitic memory's read and write speeds are both comparable to today's Flash equivalents.
That said, it's early days and work will be needed to demonstrate not only consistent behaviour and permanence of data storage, but also that the cell can indeed be used as the basis first of two- and then three-dimensional arrays of memory cells. ®
Looks like some nice research
But I only let her put lead in mine.
Nice paper, but ...
Well sorry to be a naysayer but we already have a highly effective solid state storage system, its called flash memory. This isn't even solid state. Plus its a couple of decades behind in commercial investment to develop the technology. Another irrelevant but nice new way of storing bits story. Yawn.
Nice word. Well done!
How resistent is that to being dropped? and if it breaks or your desperate to give someone some data and don't have a PC to hand can you just crack it open and write the data down manually (albeit in truely write once operation)
May I be the first
to give a sincere and utterly grovelling welcome our new carbon based overlords.