Nitrogen vacancy (NV) center-containing fluorescent nanodiamonds are promising quantum sensors for several industrial, medical, and biotechnological applications. A key factor in their applicability is their surface functionality, which can be modified in many ways. In this paper, we present primary results on a new approach for the synthesis of luminescent dye nanodiamond conjugates through an electron beam-induced radiation-chemical modification of nanodiamonds. This method involves grafting of fluorene and 9,10-dimethylanthracence. The successful modification is characterized using spectroscopic, microscopic, and mass spectrometric methods. The obtained results show that the radiation-chemical modification of nanodiamonds is fast and efficient and leads to a stable bonding of the molecule on the particle surface. For the 9,10-dimethylanthracence conjugate, a wavelength-selective excitation of the fluorescent dye and NV center inside the nanodiamond could be demonstrated. The fast radiation chemistry-based synthesis of new nanodiamond conjugates could be used to manufacture multiparameter hybrid sensor particles, with a high impact on sensor technology, medicine, and biotechnology.

中文翻译：

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基于辐射化学的分子接枝：基于金刚石的混合传感器的快速通道

含氮空位 (NV) 中心的荧光纳米金刚石是用于多种工业、医疗和生物技术应用的有前景的量子传感器。其适用性的一个关键因素是其表面功能，可以通过多种方式对其进行修改。在本文中，我们提出了通过电子束诱导辐射化学修饰纳米金刚石来合成发光染料纳米金刚石缀合物的新方法的初步结果。该方法涉及芴和9,10-二甲基蒽的接枝。使用光谱、显微镜和质谱方法对成功的修饰进行了表征。所得结果表明，纳米金刚石的辐射化学改性快速有效，并导致分子在颗粒表面上形成稳定的键合。对于 9,10-二甲基蒽缀合物，可以证明纳米金刚石内部荧光染料和 NV 中心的波长选择性激发。基于辐射化学的新型纳米金刚石缀合物的快速合成可用于制造多参数混合传感器颗粒，对传感器技术、医学和生物技术产生重大影响。