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New storage media - high density and low cost

24.10.2012

Researchers at the Institute of Substances Research and Development (Singapore) and the National University of Singapore have found that an ultra-smooth surface is a key factor for "self-assembly" - a low-cost way of high-density packaging. This discovery may be the beginning of a new generation of storage devices with a recording density of up to 10 terabits per square meter. inch.

The technology of "self-assembly" is one of the simplest and cheapest ways to create homogeneous dense nanostructures that can potentially be used for data storage. It is widely used in research and is beginning to spread in industry as a convenient tool for laying out large areas using a process technology of less than 100 nanometers. So far, however, attempts to apply "self-assembly" on various types of surfaces, such as magnetic media used to store information, have shown variable and unstable results. This phenomenon left researchers and scientists all over the world in confusion.

Now researchers at IIRV and NUS have solved the mystery by finding that the smoother the surface, the more efficient the nanostructures will "self-assemble". This achievement makes the method applicable to a wide range of surfaces, making it possible to reduce the number of defects in industrial applications to a value acceptable for mass production.

"The issue of successful self-assembly lies within a thickness of 10 atoms, or 10 angstroms in technical terms," explains Dr. Saifulla, one of the lead researchers who made the discovery. Scientists have found that this is the limit of surface roughness allowed for successful "self-assembly", which can eventually be used to create high-density storage media.

The discovery was recently published in Scientific Reports, a public journal published by Nature. The study was supported by the National Research Foundation of Singapore under the Magnetic Recording Frontier Research: Prospects for 10 terabits per square inch.

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