Spatially controlled fabrication of a bright fluorescent nanodiamond-array with enhanced far-red Si-V luminescence.
Spatially controlled fabrication of a bright fluorescent nanodiamond-array with enhanced far-red Si-V luminescence.
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DOI：
10.1088/0957-4484/25/4/045302
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发表时间：
2014-01-31
期刊：
影响因子：
3.5
通讯作者：
Catledge SA
中科院分区：
文献类型：
--
作者：
Singh S;Thomas V;Martyshkin D;Kozlovskaya V;Kharlampieva E;Catledge SA
我们展示了一种利用硅空位(Si-V)缺陷中心增强的远红外强光稳定发光来实现精确图案荧光纳米金刚石阵列的新方法。纳米钻石的精密图案化预生长播种是通过扫描探针“Dip-Pen”纳米光刻技术实现的，该技术使用静电驱动将纳米钻石从“墨水”悬臂梁转移到经过紫外线处理的亲水性二氧化硅衬底上。通过在后续的化学气相沉积处理中引入Si-V缺陷中心，实现了远红区纳米金刚石点发射的增强。研究了合适的纳米金刚石油墨的研制、墨水传输机理以及湿度、保温时间对纳米金刚石图形形成的影响。用1个S停留时间和30%的相对湿度，成功地实现了印刷前(CVD前)阵列的光点直径和光点高度分别为735 nm±27 nm和61 nm±3 nm的精密图案化，以及CVD处理后的荧光点阵列的光斑直径和高度分别为820 nm±20 nm和245 nm±23 nm。我们预计，从空间排列的纳米金刚石中集成的Si-V缺陷中心观察到的远红光强光稳定发光(~738 nm)将有利于下一代基于荧光的器件和应用的发展。
We demonstrate a novel approach to precise pattern fluorescent nanodiamond-arrays with enhanced far-red intense photostable luminescence from silicon-vacancy (Si-V) defect centers. The precision-patterned pre-growth seeding of nanodiamonds is achieved by scanning probe “Dip-Pen” nanolithography technique using electrostatically-driven transfer of nanodiamonds from “inked” cantilevers to a UV-treated hydrophilic SiO2 substrate. The enhanced emission from nanodiamond-dots in the far-red is achieved by incorporating Si-V defect centers in subsequent chemical vapor deposition treatment. The development of a suitable nanodiamond ink, mechanism of ink transport, and effect of humidity, dwell time on nanodiamond patterning are investigated. The precision-patterning of as-printed (pre-CVD) arrays with dot diameter and dot height as small as 735 nm ± 27 nm, 61 nm ± 3 nm, respectively and CVD-treated fluorescent ND-arrays with consistently patterned dots having diameter and height as small as 820 nm ± 20 nm, 245 nm ± 23 nm, respectively using 1 s dwell time and 30% RH is successfully achieved. We anticipate that the far-red intense photostable luminescence (~738 nm) observed from Si-V defect centers integrated in spatially arranged nanodiamonds could be beneficial for the development of the next generation fluorescent based devices and applications.
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影响因子：
4.1
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