Princeton builds an erasable, light-programmed ultrathin semiconductor a few molecules thick
MengdiWang10 · x · 2026-09-16
Princeton Engineering researchers published in Science Advances an ultrathin semiconductor, just a few molecules thick, that can repeatedly change its properties in response to light — effectively an erasable, light-programmable material. First author: postdoc Jaehoon Ji; lead investigator: assistant professor Saien Xie.
- Unlike conventional semiconductors whose behavior is fixed at fabrication, the material can be rewritten repeatedly, pointing toward electronics that are not just smaller but adaptable.
- The team has produced a uniform 1-inch-square sample and is now working toward building a circuit.
- Potential applications include more energy-efficient sensors, optoelectronics and computing, as traditional miniaturization hits physical limits.
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