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Team Group TM4PS4 and TM8PS4 SSDs

04.04.2015

Team Group introduced the TM4PS4 and TM8PS4 solid state drives, made in the form factor M.2 SSD (Next Generation Form Factor, NGFF).

Products are suitable for use both in mobile computers and in desktop systems, the motherboards of which are endowed with the appropriate slot. The SATA 3.0 interface is used with a bandwidth of up to 6 Gb / s.

The TM4PS4 measures 42,0 x 22,0 x 3,5mm and weighs 4g. The TM8PS4 measures 80,0 x 22,0 x 3,5mm and 9g. Both have a capacity of 128 or 256 GB.

TM4PS4 drives provide read and write speeds of up to 550 and 150 MB/s, respectively. The IOPS (input / output operations per second) for random reading in blocks of 4 KB reaches 70 thousand, for writing - 40 thousand.

TM8PS4 solutions deliver read/write speeds up to 560/300 MB/s. The IOPS value is up to 73K read and up to 70K write.

The claimed mean time between failures (MTBF) reaches 1,5 million hours. Supports TRIM commands and DevSleep mode, which extends the battery life of the mobile device. The products come with a three-year warranty.

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Graphene on platinum surfaces defies Coulomb's law 01.02.2023

Researchers from Basel and Tel Aviv have found that friction changes with speed in specific graphene structures on platinum surfaces, violating Coulomb's law, which states that friction is independent of velocity in the macrocosm.

Materials made from individual atomic layers are highly valued for their low friction properties, useful for reducing friction on hard drives or moving parts of satellites or space telescopes. Composed of a single layer of carbon atoms arranged like a honeycomb, graphene is a prime example and is being tested for its potential as a lubricating layer. Earlier research has shown that graphene tape can slide across a gold surface with almost no friction.

If graphene is applied to a platinum surface, this has a significant effect on the measured friction forces. Now physicists from the Universities of Basel and Tel Aviv have figured out that in this case the friction depends on the speed at which the tip of the atomic force microscope moves across the surface. This conclusion came as a surprise, since friction does not depend on speed according to Coulomb's law, applied in the macrocosm.

When combined with a platinum substrate, graphene no longer forms only a hexagonal honeycomb structure of carbon atoms, but forms superstructures known as Moiré superlattices. Then the surface is no longer absolutely flat and has a certain degree of roughness.

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The researchers found that on the ridges of the moiré superstructures, there is more resistance as the tip moves. These ridges experience elastic deformation through the pushing tip before relaxing again when the pressure is high enough. This effect results in large frictional forces that increase with tip speed. Simulation and analytical model confirm the experimental results obtained by this international team of researchers.

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