Up-Conversion Behavior of Er3+/Yb3+-Activated Gd2O3 Phosphor for Magnetic Resonance Application

IF 0.8 4区 化学 Q4 SPECTROSCOPY
Praveen Kumar Yadaw, J. Mitrić, N. Romčević, Vikas Dubey, N. Kumar Swamy, M. C. Rao, Ravindranadh Koutavarapu
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引用次数: 0

Abstract

We present new aspects of erbium- or ytterbium-doped pure gadolinium oxide (Gd2O3:Er3+/Yb3+) as a suitable candidate for drug delivery and magnetic resonance (MR) applications. The samples were prepared using the conventional sol–gel synthesis technique. The structural studies revealed that the prepared sample was monophased and crystallizes in a cubic structure. FTIR measurements confirmed the creation of Gd2O3:Er3+/Yb3+ phosphor. SEM micrographs clearly indicated that the particles crystallized in uniform shape, exhibiting nano-rod formation, with the particle size ranging from 55 to 5 nm. TEM images revealed that Er3+- and Yb3+-co-doped Gd2O3 nanoparticles were the collection of the nano-rods 2–4 nm thick and 18–20 nm long. Also, photoluminescence analysis of the phosphor samples for variable concentrations of doping ions was presented. When doped with Er3+/Yb3+, nano-rod Gd2O3 emits intense green emission and some red emission peaks, under a 980-nm near-infrared laser. Our study shows that as-prepared samples may be useful for optical imaging systems and that nano-rod formation may be used as a major host carrier for drug delivery.

用于磁共振应用的 Er3+/Yb3+ 激活型 Gd2O3 磷光体的上转换行为
我们介绍了掺杂铒或镱的纯氧化钆(Gd2O3:Er3+/Yb3+)作为药物输送和磁共振(MR)应用的合适候选材料的新特性。样品采用传统的溶胶-凝胶合成技术制备。结构研究表明,制备的样品为单相,结晶为立方结构。傅立叶变换红外光谱测量证实了 Gd2O3:Er3+/Yb3+ 荧光粉的生成。扫描电镜显微照片清楚地表明,颗粒结晶形状均匀,呈纳米棒状,粒径在 55 至 5 纳米之间。TEM 图像显示,Er3+- 和 Yb3+ 共掺的 Gd2O3 纳米粒子是粗 2-4 nm、长 18-20 nm 的纳米棒的集合体。此外,还对不同浓度掺杂离子的荧光粉样品进行了光致发光分析。当掺杂 Er3+/Yb3+ 时,纳米棒 Gd2O3 在 980 纳米近红外激光下会发出强烈的绿色发射和一些红色发射峰。我们的研究表明,制备的样品可用于光学成像系统,纳米棒的形成可用作药物输送的主要载体。
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来源期刊
CiteScore
1.30
自引率
14.30%
发文量
145
审稿时长
2.5 months
期刊介绍: Journal of Applied Spectroscopy reports on many key applications of spectroscopy in chemistry, physics, metallurgy, and biology. An increasing number of papers focus on the theory of lasers, as well as the tremendous potential for the practical applications of lasers in numerous fields and industries.
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