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Calculations ran inside a water droplet on nucleic-acid hardware

On 19 September 2026 Live Science described nucleic-acid hardware running calculations inside a drop of water. The Scaffolded DNA Computer (SDC) was described in Nature on 16 September and tested on 10 programs including 100-bit computations, with more than 700 calculations demonstrated.

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A clear water droplet on a glass slide, with a subtle molecular lattice visible inside on a bright laboratory bench.

A calculating machine in a drop of salt water

On 19 September 2026 Live Science described nucleic-acid hardware running calculations inside a drop of water. Abeer Eshra of Maynooth University said the system settles into an energetically preferred state that encodes the answer. A long scaffold strand and shorter staple strands self-assemble when heated and cooled in a drop of water and salt. Unlike silicon transistors switching voltages, the computation rests on base-pair binding between strands. The Scaffolded DNA Computer (SDC) was described in Nature on 16 September.[1]

Hundred-bit sums, thirty seconds apiece

The system was tested on 10 programs, including 100-bit computations. A 10 + 3 instance took around 30 seconds. Researchers demonstrated more than 700 computations. The programs covered addition, multiplication by 3, division by 2 and eight-bit parity. Three of them were redone up to 24 times.[1]

A machine that dried out and ran again

In one experiment water was added to a partly dried SDC and the computation was repeated 1.5 years later. The long-term data storage, energy-efficient computation and in-cell uses the authors point to are labelled speculative in the study. Live Science's 19 September 2026 article treats those uses as prospective.[1]

References

  1. News sourceLive ScienceA DNA computer ran calculations in a drop of water
    Primary paperNatureA thermodynamically favoured molecular computer
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