Evaporation and alignment of 1-undecene functionalised nanodiamonds

Evaporation and alignment of 1-undecene functionalised nanodiamonds
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1-十一碳烯功能化纳米金刚石的蒸发和排列

DOI:
10.1016/j.jlumin.2014.06.045
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发表时间:
2014
影响因子:
3.6
通讯作者:
Astuti Y
Astuti Y
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Astuti Y

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排列金刚石纳米粒子的可能性具有许多潜在的技术应用,但实现这一点的方法很少,并且该领域的研究可以被认为处于起步阶段。迄今为止,常用的两种方法是光刻和化学气相沉积(CVD),但这些方法都比较复杂且效果较差。在本文中,我们提出了一种粒子排列的新技术,该技术更简单并且避免了粒子结构损坏。该方法的工作原理是将 1-十一烯附着到纳米金刚石表面,从而对尺寸为 5 nm 的纳米金刚石进行功能化;然后使用 UHV 蒸发颗粒,并在 200 °C 下沉积到 TEM 网格和云母表面上。 XPS、SERS、HRTEM、发光光谱和发光显微成像已用于表征蒸发前后的样品。将纳米金刚石沉积到云母表面上会产生长度为 500 µm 的颗粒排列。 XPS 和拉曼光谱证实不存在非金刚石碳(sp2 杂化碳)。此外,在功能化纳米金刚石蒸发之前和之后,还观察到了尺寸为 5 nm 的纳米金刚石所特有的光致发光(发射范围为 2.48–1.55 eV;500–800 nm)。
The possibility to align diamond nanoparticles has a number of potential technological applications, but there are few methods by which this can be achieved, and research in this field can be considered to be in its infancy. Hitherto, two methods which have been commonly used are lithography and chemical vapour deposition (CVD), but these methods are both complex and have poor effectiveness. In this paper, we present a new technique for particle alignment, which is simpler and avoids particle structural damage. The method works by functionalising the nanodiamonds of size 5 nm by attaching 1-undecene onto the nanodiamond surfaces; the particles are then evaporated using UHV and deposited onto TEM grids and mica surfaces at 200 °C. XPS, SERS, HRTEM, luminescence spectroscopy and luminescence micro-imaging have been applied to characterise samples both before and after evaporation. Deposition of nanodiamond onto a mica surface resulted in particle alignment with length scales of 500 µm. The XPS and Raman spectra confirmed the absence of non-diamond carbon (sp2-hybridized carbon). Moreover, photoluminescence (emitting in the range of 2.48–1.55 eV; 500–800 nm) which is characteristic for nanodiamond with size of 5 nm was also observed, both before and after evaporation of the functionalised nanodiamonds.
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