کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
229380 | 465025 | 2016 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Offer a novel method for size appraise of NiO nanoparticles by PL analysis: Synthesis by sonochemical method Offer a novel method for size appraise of NiO nanoparticles by PL analysis: Synthesis by sonochemical method](/preview/png/229380.png)
In this work, we will discuss the optical properties of NiO nanoparticles that we have investigated recently by photoluminescence (PL) spectroscopy. In particular, we will show the blue-shifts of PL, originating from the electron–hole recombination of the self-trapped exciton (STE), observed in smaller-sized NiO nanoparticles. To explain the size effect in relating to the STE PL shift, a question has been raised on whether it is appropriate to apply him quantum confinement (QC) theory usually used for the Mott-Winner type excitons in semiconductors to wide band-gap material, such as silica. Variations in several parameters and their effects on the structural (crystal size and morphology) properties of nanoparticles were investigated. Characterizations were carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal stability (TGA and DTA), solid state UV and solid state florescent (PL).
Journal: Journal of Saudi Chemical Society - Volume 20, Issue 3, May 2016, Pages 245–252