Quantification of nitrogen in HPHT diamond: A synergistic approach combining FTIR and EPR validation

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-08-28 DOI:10.1016/j.optmat.2025.117450

Jiao Yang , Haikuo Wang , Yijin Xie , Zhicai Zhang , Yao Tang , Zhiqiang Hou , Chao Wang , Hao Li , Yikan Yang , Jun Gao , Derong Shou , Xiaoping Ouyang

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引用次数: 0

Abstract

Nitrogen in diamond is a prerequisite for the formation of nitrogen-vacancy (NV) center, making precise quantification of nitrogen concentration critical for diamond-based sensors and quantum devices. This study aims to address the significant quantitative deviation (approximately 61 %) caused by the nitrogen doping inhomogeneity in high-pressure and high-temperature (HPHT) diamonds and the spatial resolution constraints of fourier transform infrared spectroscopy (FTIR) characterization through a FTIR averaging method across the entire diamond slice region to quantify nitrogen concentration. Quantitative analysis demonstrates that for HPHT diamond, a single region in nitrogen concentration determined by FTIR exhibits excellent reproducibility with a standard deviation of approximately 6 %, while the standard deviation across the entire diamond slice is reduced to approximately 20 %. Moreover, combining electron paramagnetic resonance (EPR) method, the average nitrogen concentration values measured by FTIR across the entire diamond slice region exhibit good linear correlation (R² > 0.98) with EPR results, indirectly validating the reliability of our characterization approach used in this paper for nitrogen quantification. This study can provide a reference scheme for the quantitative analysis of nitrogen in HPHT diamonds and lay a solid foundation for the controlled preparation and optimization of quantum sensing materials based on HPHT diamonds in future research.

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HPHT金刚石中氮的定量：一种结合FTIR和EPR验证的协同方法

金刚石中的氮是氮空位（NV）中心形成的先决条件，因此氮浓度的精确定量对金刚石传感器和量子器件至关重要。本研究旨在通过整个金刚石切片区域的傅里叶变换红外光谱（FTIR）平均方法来量化氮浓度，解决由高压高温（HPHT）金刚石中氮掺杂不均匀性引起的显著定量偏差（约61%）以及傅里叶变换红外光谱（FTIR）表征的空间分辨率限制。定量分析表明，对于HPHT金刚石，FTIR测定的氮浓度的单个区域具有良好的再现性，标准偏差约为6%，而整个金刚石切片的标准偏差降至约20%。此外，结合电子顺磁共振（EPR）方法，FTIR测量的整个金刚石切片区域的平均氮浓度值与EPR结果呈良好的线性相关（R2 > 0.98），间接验证了本文所采用的表征方法用于氮定量的可靠性。本研究可为HPHT金刚石中氮的定量分析提供参考方案，为今后研究中基于HPHT金刚石的量子传感材料的可控制备和优化奠定坚实的基础。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.