Overview
- The peer‑reviewed study shows that only the silver‑terminated surface of silver iodide nucleates layered ice, while the iodide‑terminated side does not.
- Atomic‑resolution force microscopy in ultrahigh vacuum at very low temperatures, supported by simulations, revealed a hexagonal template on the silver‑rich face versus a rectangular pattern on the iodide‑rich face.
- Researchers published the findings in Science Advances, linking surface termination rather than bulk lattice similarity to ice nucleation efficiency.
- Operational reports in late 2025 reflected this sensitivity: a New Delhi effort using silver iodide and salt produced only minimal rain after officials deemed the clouds too dry and unstable.
- Chinese programs reported roughly a five percent rainfall increase over more than 8,000 square kilometers under suitably moist conditions, as researchers point to prospects for greener materials and more targeted deployment against ongoing concerns about silver accumulation.