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Enhanced magnetic, antibacterial and optical properties of Sm doped ZnO thin films: Role of Sm doping

机译：SM掺杂ZnO薄膜的增强磁性，抗菌和光学性质：SM掺杂的作用

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Thin films of Sm3+ ions doped ZnO were prepared by dip coating method. To enhance the oxygen vacancy in the host ZnO lattice and obtain crystallinity, the thin films were annealed at 400 degrees dC for 2 h in air. X-ray diffractions (XRD) study displays the hexagonal wurtzite structure of ZnO with crystallite size in the range of 27.37-24.21 nm. The induced carrier concentration, intrinsic defects and oxygen vacancies produced a blue shift in the band gap (Eg) with an increase in Sm doping percentage. The surface morphology is granular with slight agglomeration. Thin films have shown violet photoluminescence. The emissions intensity can be tailored by increasing the Sm percentage which is due to the increase in defect concentration as well as find application in optoelectronic devices. Room temperature ferromagnetism is recorded in the thin films. Hysteresis show that 1 at. wt. % Sm doped ZnO has larger saturation magnetization than 5 at. wt. % Sm doped thin films. The work has established that rare earth element doping in ZnO produces diluted magnetic semiconductors which can be part of absorber layer of solar cell, to store data in memory devices and optoelectronics applications. Antibacterial studies were conducted for Staphylococcus aureus (S. Aureus), klebsiella pneumonia (K. B), Pseudomonas aeruginosa (P. aeruginosa) and Escherichia coli (E. coli) bacterial strains by applying the agar well diffusion method to suspension containing undoped ZnO and Sm doped ZnO nanoparticles. The enhancement in the zone of inhibition with an increase in samarium exhibits high antibacterial activity. The results predict that Sm doped ZnO is a good possibility of food packing, removal of the tumor, treatment of pneumonia and a diagnosis of malign diseases.
机译：通过浸涂方法制备SM3 +离子掺杂ZnO的薄膜。为了增强主体ZnO格子中的氧气空位并获得结晶度，将薄膜在400℃下在空气中退火2小时。 X射线衍射（XRD）研究显示ZnO的六边形紫立岩结构，含有微晶尺寸，范围为27.37-24.21nm。诱导的载体浓度，内在缺陷和氧空位在带隙（例如）中产生蓝色偏移（例如），随着SM掺杂百分比的增加而增加。表面形态是颗粒状，具有轻微的聚集。薄膜已经显示出紫色的光致发光。通过增加由于缺陷浓度的增加以及在光电器件中寻找应用而导致的SM百分率可以定制排放强度。室温铁磁性录入薄膜中。滞后表明1 at。 wt。 ％SM掺杂ZnO具有比5更大的饱和磁化强度。 wt。 ％SM掺杂薄膜。该工作已经确定，稀土元素在ZnO中掺杂产生稀释的磁半导体，其可以是太阳能电池吸收层的一部分，以存储在存储器装置和光电子应用中的数据。通过将琼脂孔扩散法应用于含有未掺杂的ZnO的悬浮液，对葡萄球菌（Klebsiella），Klebsiella肺炎（K.B），假单胞菌菌（K.B），铜绿假单胞菌（P.Arginosa）和大肠杆菌（大肠杆菌）细菌菌株进行抗菌研究。和SM掺杂的ZnO纳米粒子。抑制区的增强随着钐的增加表现出高抗菌活性。结果预测，SM掺杂的ZnO是食品包装的良好可能性，去除肿瘤，治疗肺炎和诊断恶性疾病。

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