不同環境下的奈米鑽石特性

Abstract

氮-空缺(NV)中心是奈米鑽石的一種色中心缺陷，由於其自旋和光學特性，在生物學、磁感應和量子計算等領域有著廣泛的應用。其對外部磁場的極度敏感性和長的相干時間使其成為量子計算中最有前景的候選者之一。不同的環境也與其在實驗中的表現相關。然而，難以控制納米金剛石的組裝使得其特性機制與理解不同。在這裡，我們通過靜電引力吸引勢的納米金剛石聚集方法以及不同環境下的特性進行了演示。由於聚集物中含有多個顆粒而非單個顆粒，我們認為納米金剛石之間存在著相互吸引的作用。我們展示了納米金剛石核的磁矩在生長時被外部磁場所排列。聚集物中納米金剛石核的磁矩排列保持在特定的方向，使得其能量較正常樣品較低。納米金剛石聚集物在不同環境下顯示出不同的特性，這對於未來納米設備製造的量子計算應用非常有益。

The nitrogen-vacancy (NV) center is a defect in nanodiamond that has a various application in biology, magnetic sensing, and quantum computing because of its spin and optical properties. The extremely sensitive to external magnetic field and long decoherent time make it become the most promising candidates in quantum computing. And the different environment also be relative to their behavior on the experiment. However, it is hard to control the assembly of nanodiamond that make the mechanism of characteristics is different to understanding. Here, we demonstrate the nanodiamond assembly of clustering method by electrostatics attractive potential and the characteristics of nanodiamond in different environments. Because of the deposits in cluster not a single particle, we think there is the attractive interaction between nanodiamond particles. We demonstrate the magnetic moment of nanodiamond nuclear is aligned by the external magnetic field when growing. The magnetic moment of nanodiamond nuclear cluster alignment keep in the specific orientation that make the energy less than normal sample. The nanodiamond cluster particle show the various characteristics in different environment, which is beneficial for the quantum computing application made by nanodevice in the future.