Chinese researchers have developed a high-density molecular storage device that uses organic molecules for data recording and encryption. Data is written and retrieved using an atomic force microscope, which manipulates molecular states. This technology has the potential to enable hard drives with capacities of 100 TB or more if the lifespan of the microscope’s probe tips can be extended.
The storage system is based on 200 self-organizing ruthenium (Ru LPH) molecules forming an ultrathin monolayer just 2.54 nm thick. Ruthenium ions alter the material’s conductivity under weak voltage applied by the atomic microscope tip, allowing for 96 distinct conductivity states per storage unit (6-bit encoding). The technology does not require strong magnetic fields or heating, significantly reducing energy consumption.
Molecular hard drives feature built-in encryption at the bit-operation level, preventing unauthorized access. Additionally, the system can perform logical operations directly within the storage block, reducing computational workload. However, since the drives are designed for use in rotating storage devices, their overall power consumption may be comparable to traditional HDDs.
The primary limitation of this technology remains the short lifespan of the atomic microscope tips, which currently last between 5 and 50 hours of continuous operation. If this issue is resolved, molecular storage devices could rival traditional hard drives and tape-based archival systems in data density.
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