AI 中文总结
该研究聚焦纳米金刚石中氮-空位中心的材料约束机制，提出缓解策略，推动其作为移动量子传感器在生物传感与纳米尺度科学中的可靠应用。
AI 中文摘要
光学可寻址的固态自旋缺陷已成为强大的多模态量子传感器，体金刚石中的氮-空位（NV）中心可在环境条件下提供基准量子控制与灵敏度。将这类缺陷嵌入纳米金刚石（NDs）中，可将上述能力拓展至能进入复杂生物及纳米尺度环境的移动探针。然而，尺寸缩小会引入体自旋杂质之外的约束，特别是晶格应变增强与表面诱导的噪声源，这会缩短NV自旋弛豫时间（T1和T2）、破坏NV电荷态的稳定性，还会导致自上而下方法制备的NDs出现显著的颗粒间变异性。这些效应既会影响传感性能，也会干扰真实环境下多模态信号的定量解读。本文系统性阐述了材料性质约束NDs中NV行为的物理机制，并提出了缓解策略，以实现这类移动量子传感器在生物传感与纳米尺度科学中的可靠应用。
英文摘要
Optically addressable solid-state spin defects have emerged as powerful multimodal quantum sensors, with nitrogen-vacancy (NV) centers in bulk diamond providing benchmark quantum control and sensitivity under ambient conditions. Embedding such defects in nanodiamonds (NDs) extends these capabilities to mobile probes capable of accessing complex biological and nanoscale environments. Reduced dimensions, however, introduce constraints beyond volumetric spin impurities, notably enhanced lattice strain and surface-induced noise sources, which shorten NV spin relaxation times (T1 and T2) and destabilize the NV charge state, as well as resulting in pronounced particle-to-particle variability in NDs typically produced by top-down approaches. These effects complicate both sensing performance and the quantitative interpretation of multimodal signals in realistic environments. This article provides a structured perspective on the physical mechanisms by which material properties constrain NV behavior in NDs, together with mitigation strategies that shape the robust use of these mobile quantum sensors for biosensing and nanoscale science.
CommentsPublished in ACS Nano under CC-BY 4.0
Journal refACS Nano 20, 17143 (2026)
