Rani Janardhanan R, Oh Se-I, Jang Jae-Hyung
School of Information and Communications, Gwangju Institute of Science and Technology, Oryongdong, Buk-gu, Gwangju 61005, Korea.
Materials (Basel). 2015 Dec 4;8(12):8460-8466. doi: 10.3390/ma8125470.
Graphene oxide (GO)-phosphor hybrid nanoscrolls were synthesized using a simple chemical method. The GO-phosphor ratio was varied to find the optimum ratio for enhanced optical characteristics of the hybrid. A scanning electron microscope analysis revealed that synthesized GO scrolls achieved a length of over 20 μm with interior cavities. The GO-phosphor hybrid is extensively analyzed using Raman spectroscopy, suggesting that various Raman combination modes are activated with the appearance of a low-frequency radial breathing-like mode (RBLM) of the type observed in carbon nanotubes. All of the synthesized GO-phosphor hybrids exhibit an intense luminescent emission around 540 nm along with a broad emission at approximately 400 nm, with the intensity ratio varying with the GO-phosphor ratio. The photoluminescence emissions were gauged using Commission Internationale d'Eclairage (CIE) coordinates and at an optimum ratio. The coordinates shift to the white region of the color spectra. Our study suggests that the GO-phosphor hybrid nanoscrolls are suitable candidates for light-emitting applications.
采用简单化学方法合成了氧化石墨烯（GO）-磷光体混合纳米卷。改变GO与磷光体的比例以找到增强该混合物光学特性的最佳比例。扫描电子显微镜分析表明，合成的GO纳米卷长度超过20μm且具有内部空腔。利用拉曼光谱对GO-磷光体混合物进行了广泛分析，这表明随着在碳纳米管中观察到的那种低频径向呼吸类模式（RBLM）的出现，各种拉曼组合模式被激活。所有合成的GO-磷光体混合物在540nm左右呈现强烈的发光发射，同时在约400nm处有宽发射，强度比随GO-磷光体比例而变化。使用国际照明委员会（CIE）坐标并在最佳比例下测量光致发光发射。坐标向色谱的白色区域移动。我们的研究表明，GO-磷光体混合纳米卷是发光应用的合适候选材料。
