| Oct 14, 2025 |
One silver atom makes nanoclusters 77 times brighterAdding a single silver atom to a nanocluster increased its brightness 77 times, revealing how atomic design can power next-gen lighting and sensor technologies.(Nanowerk News) A small tweak at the atomic level has led to a major leap in light-emitting efficiency. Scientists have found that adding just one silver atom to a nanocluster can increase its brightness 77 times, a breakthrough that could reshape the future of lighting and sensor technologies (Journal of the American Chemical Society, "Triggering Photoluminescence in High-Nuclear Silver Nanoclusters via Extra Silver Atom Incorporation"). |
| Photoluminescence quantum yield measures how effectively a material turns absorbed energy into light. The higher the value, the more efficiently it glows—a crucial feature in technologies like OLED displays and optical sensors. |
| Silver nanoclusters have long attracted interest for their distinctive optical properties, but their weak light emission has limited real-world use. To understand how structure affects performance, the researchers created and compared two nearly identical nanoclusters. The only difference was that one contained a single extra silver atom. |
| That tiny change made all the difference. Subtle adjustments to the surface molecules allowed the extra atom to fit into the outer shell of the cluster. While the core stayed the same, the added atom changed how the cluster behaved. It increased the rate of light emission and made the structure more rigid, reducing energy loss through heat. Together, these effects produced a 77-fold rise in light output at room temperature. |
| “This is the first clear evidence that the incorporation of just one extra silver atom, guided by ligand design, can drastically boost performance,” said Professor Negishi. “Our findings open a pathway to rationally engineer efficient light-emitting nanoclusters through atomic-level structural modifications.” |
| The discovery offers a new strategy for designing next-generation materials for bright, energy-efficient devices, bioimaging tools, and catalysts—all relying on strong luminescence at everyday temperatures. |
| Source: Tohoku University (Note: Content may be edited for style and length) |
