Introducing the light-operated hard drives of tomorrow

Phys.org  March 10, 2020 An international team of researchers (Switzerland, Spain) present a method for reversible, light-induced tuning of ferromagnetism at room temperature using a halide perovskite/oxide perovskite heterostructure. They showed that photoinduced charge carriers from the CH3NH3PbI3 photovoltaic perovskite efficiently dope the thin La0.7Sr0.3MnO3 film and decrease the magnetization of the ferromagnetic state, allowing rapid rewriting of the magnetic bit. The method is still experimental, but it may be used to build the next generation of memory-storage systems, with higher capacities and with low energy demands. The research opens avenues for magnetooptical memory devices…read more. TECHNICAL ARTICLE

Storing data in everyday objects

Science Daily  December 9, 2019 DNA storage offers substantial information density and exceptional half-life. An international team of researchers (Switzerland, Israel) devised a ‘DNA-of-things’ (DoT) storage architecture to produce materials with immutable memory. In a DoT framework, DNA molecules record the data, and these molecules are then encapsulated in nanometer silica beads, which are fused into various materials that are used to print or cast objects in any shape. They applied DoT to three-dimensionally print a Stanford Bunny that contained a 45 kB digital DNA blueprint for its synthesis. Then they synthesized five generations of the bunny, each from the memory […]

Molecular eraser enables better data storage and computers for AI

EurekAlert  November 27, 2019 The bottom up approaches for atomic and molecular electronics, quantum computation, and data storage, all rely on a well-developed understanding of materials at the atomic scale. Researchers in Canada have developed a scanning tunneling microscope (STM) charge characterization technique which reduces the influence of the typically perturbative STM tip field for this purpose. Using the technique, they observed single molecule binding events to atomically defined reactive sites. They developed a simplified error correction tool for automated hydrogen lithography and incorporated the molecular repassivation technique as the primary rewriting mechanism in ultra-dense atomic data storage designs. The […]

Molecular thumb drives: Researchers store digital images in metabolite molecules

Science Daily  July 3, 2019 Researchers at Brown University have demonstrated that the metabolome (arrays of liquid mixtures containing sugars, amino acids and other types of small molecules) is an information-rich molecular system with diverse chemical dimensions which could be harnessed for information storage and processing. As a proof of principle, they demonstrated a workflow for representing abstract data in synthetic mixtures of metabolites. They wrote more than 100,000 bits of digital image data into metabolomes and stored that could be decoded with accuracy exceeding 99% using multi-mass logistic regression. These early demonstrations provide insight into some of the benefits […]

Racing Toward Yottabyte Information

IEEE Spectrum  June 26, 2019 The highest prefix in the international system of units is yotta, Y is 10 to the power of 24. We’ll have that many bytes within a decade. And once we start creating more than 50 trillion bytes of information per person per year, will there be any real chance of making effective use of it? It is easier to find new prefixes for large databases than to decide how large is large enough. After all, there are fundamental differences between accumulated data, useful information, and insightful knowledge…read more.

Key obstacles to scaling up DNA data storage

Science Daily  June 3, 2019 To reach practical capacities, new systems for organizing and accessing information are needed. Researchers at North Carolina State University used chemical handles to selectively extract unique files from a complex database of DNA mimicking 5 TB of data and designed and implemented a nested file address system that increases the theoretical maximum capacity of DNA storage systems by five orders of magnitude. The advancements enable the development and future scaling of DNA-based data storage systems with modern capacities and file access capabilities…read more. TECHNICAL ARTICLES

Making steps toward improved data storage

Phys.org  November 7, 2018 Researchers in Japan developed a terahertz pulse generator that delivered ultra-short and highly intense terahertz pulses across a pair of gold antennas. The pulses created an electric field in the material composed of germanium, antimony and tellurium (GST) sample, comparable to that of an electrically switched device. It greatly reduced the heat diffusion because of the extremely short duration of terahertz pulses enabling fine control over the rate and direction of GST crystallization. After a certain point when terahertz pulses were increased, crystal conductivity rapidly sped up instead of rising in line with the increase in […]

A USB stick? In the distant future, a little powder should suffice

Nanowerk  October 29, 2018 Researchers in Belgium developed a chemical process that allowed information, such as a piece of text or a QR code, to be stored in powder form. This information can then be read out by means of a biochemical method of analysis. They wrote two programs to make the processing of information run fast and automatically. The first program makes sure that the data on the molecules can be analysed in seconds, the second program automates the translation process from the QR code to the molecules and vice versa. That is how the information stored in the […]

Scientists discover new mechanism for information storage in one atom

Phys.org  September 25, 2018 An international team of researchers (China, Russia) has shown a mechanism for single-atom magnetic storage based on bistability in the valency of an individual Co atom on semiconducting black phosphorus (BP). Calculations reveal that distance-dependent screening from the BP surface stabilizes the two distinct valencies, each with a unique orbital population, total magnetic moment, and spatial charge density. Excellent correspondence between the measured and predicted charge densities reveal that such orbital configurations can be accessed and manipulated without a spin-sensitive readout mechanism. This orbital memory derives stability from the energetic barrier to atomic relaxation, demonstrating the […]

Two-dimensional multibit optoelectronic memory

Nanowerk  September 21, 2018 An international team of researchers (Singapore, China) developed multibit nonvolatile optoelectronic memory based on a heterostructure of monolayer tungsten diselenide and few-layer hexagonal boron nitride. It ensures over 128 (7 bit) distinct storage states. The memory demonstrates robustness with retention time over 4.5 × 104 s. The heterostructure architecture is also applicable to other two-dimensional materials, which is confirmed by the realization of black phosphorus/boron nitride optoelectronic memory… read more. Open Access TECHNICAL ARTICLE