具有硅空位色彩中心的核壳金刚石-石墨烯针

IF 2.8 3区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Express Pub Date : 2024-03-18 DOI:10.1364/ome.518724
Mariam Maku Quarshie, Sergei Malykhin, and Polina Kuzhir
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引用次数: 0

摘要

金刚石纳米结构中的色彩中心为生物医学开辟了新天地,为感知温度、pH 值和磁场提供了一个生物相容性材料平台。在富含颜色中心的金刚石上覆盖石墨烯外壳,可以从根本上扩展其应用潜力。具体来说,在超短激光脉冲的照射下,高吸收性石墨烯外壳可用于激发冲击声波,通过焦耳加热破坏癌细胞或药物光活化。在这项研究中,我们提出了一种制造金刚石-石墨核壳结构的新方法。通过在 900°C 下真空退火 30 分钟,精确控制单晶金刚石针(SCDN)上石墨层的生长,我们保留了硅空穴(SiV-)中心 57% 的光发射,同时保持了它们的光谱峰。由于石墨外壳的存在,SiV- 发光减少,与我们的预期相反,我们观察到金刚石针中 SiV- 最初的高亮度持续存在。这使我们能够从光谱上检测到 SiV- 发光,即使在核壳结构中也是如此。我们的研究结果表明,这些结构的特性可通过温度和持续时间控制进行调整,这为其在具有传感功能的先进生物医学工具中的应用提供了广阔的前景。
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Core-shell diamond-graphene needles with silicon-vacancy color centers
Color centers in diamond nanostructures open new horizons in biomedicine, offering a biocompatible material platform for sensing temperature, pH, and magnetic field. Covering of the color centers enriched diamonds with graphene shell can essentially extend their application potential. Specifically, under irradiation with ultrashort laser pulses, the highly absorptive graphene shell can be used for excitation of a shock acoustic wave which can be used for cancer cell destruction or drug photoactivation through the Joule heating. In this study, we present a novel method for creating diamond-graphite core-shell structures. Through precise control of the growth of the graphitic layer on Single Crystal Diamond Needles (SCDNs) via vacuum annealing at 900°C for 30 minutes, we preserved 57% of the light emission from silicon-vacancy (SiV-) centers while maintaining their spectral peaks. Contrary to our expectations of reduced SiV- luminescence due to the presence of the graphitic shell, we observed that the initial high brightness of SiV- in the diamond needles persisted. This enabled us to detect SiV- luminescence spectrally, even within the core-shell structures. Our results underscore the tunability of these structures’ properties through temperature and duration control, suggesting promising prospects for their application in advanced biomedical tools with sensing capabilities.
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来源期刊
Optical Materials Express
Optical Materials Express MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS
CiteScore
5.50
自引率
3.60%
发文量
377
审稿时长
1.5 months
期刊介绍: The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optical Materials Express (OMEx), OSA''s open-access, rapid-review journal, primarily emphasizes advances in both conventional and novel optical materials, their properties, theory and modeling, synthesis and fabrication approaches for optics and photonics; how such materials contribute to novel optical behavior; and how they enable new or improved optical devices. The journal covers a full range of topics, including, but not limited to: Artificially engineered optical structures Biomaterials Optical detector materials Optical storage media Materials for integrated optics Nonlinear optical materials Laser materials Metamaterials Nanomaterials Organics and polymers Soft materials IR materials Materials for fiber optics Hybrid technologies Materials for quantum photonics Optical Materials Express considers original research articles, feature issue contributions, invited reviews, and comments on published articles. The Journal also publishes occasional short, timely opinion articles from experts and thought-leaders in the field on current or emerging topic areas that are generating significant interest.
期刊最新文献
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