Bharti Dhiraj Kumar, Verma Rajni, Rani Sonam, Agarwal Daksh, Mehra Sonali, Gangwar Amit Kumar, Gupta Bipin Kumar, Singh Nidhi, Srivastava Avanish Kumar
Nanoscale Research Facility, Indian Institute of Technology Delhi, New Delhi 110016, India.
CSIR-Advanced Materials and Processes Research Institute, Bhopal 462026, India.
Nanomaterials (Basel). 2023 Jan 29;13(3):538. doi: 10.3390/nano13030538.
Herein, we demonstrate a process for the synthesis of a highly crystalline bi-functional manganese (Mn)-doped zinc silicate (ZnSiO) nanostructures using a low-cost sol-gel route followed by solid state reaction method. Structural and morphological characterizations of Mn-doped ZnSiO with variable doping concentration of 0.03, 0.05, 0.1, 0.2, 0.5, 1.0, and 2.0 wt% were investigated by using X-ray diffraction and high-resolution transmission electron microscopy (HR-TEM) techniques. HR-TEM-assisted elemental mapping of the as-grown sample was conducted to confirm the presence of Mn in ZnSiO Photoluminescence (PL) spectra indicated that the Mn-doped ZnSiO nanostructures exhibited strong green emission at 521 nm under 259 nm excitation wavelengths. It was observed that PL intensity increased with the increase of Mn-doping concentration in ZnSiO nanostructures, with no change in emission peak position. Furthermore, magnetism in doped ZnSiO nanostructures was probed by static DC magnetization measurement. The observed photoluminescence and magnetic properties in Mn-doped ZnSiO nanostructures are discussed in terms of structural defect/lattice strain caused by Mn doping and the Jahn-Teller effect. These bi-functional properties of as-synthesized ZnSiO nanostructures provide a new platform for their potential applications towards magneto-optical and spintronic and devices areas.
在此，我们展示了一种通过低成本溶胶-凝胶法随后采用固态反应法合成高度结晶的双功能锰（Mn）掺杂硅酸锌（ZnSiO）纳米结构的过程。使用X射线衍射和高分辨率透射电子显微镜（HR-TEM）技术研究了掺杂浓度分别为0.03、0.05、0.1、0.2、0.5、1.0和2.0 wt%的Mn掺杂ZnSiO的结构和形态特征。对生长的样品进行了HR-TEM辅助元素映射，以确认ZnSiO中Mn的存在。光致发光（PL）光谱表明，Mn掺杂的ZnSiO纳米结构在259 nm激发波长下于521 nm处表现出强烈的绿色发射。观察到PL强度随着ZnSiO纳米结构中Mn掺杂浓度的增加而增加，发射峰位置没有变化。此外，通过静态直流磁化测量探测了掺杂ZnSiO纳米结构中的磁性。从Mn掺杂引起的结构缺陷/晶格应变和 Jahn-Teller 效应的角度讨论了Mn掺杂ZnSiO纳米结构中观察到的光致发光和磁性特性。合成的ZnSiO纳米结构的这些双功能特性为其在磁光和自旋电子器件领域的潜在应用提供了一个新平台。
