Abstract
KTiOPO4 nanoparticles are known as the best candidate to utilize for second-harmonic generation in multiphoton microscopes and bio labels. Size and shape are important and effective parameters to control the properties of nanoparticles. In this paper, we will investigate the role of capping agent concentration on the size and shape control of KTP nanoparticles. We synthesized KTP nanoparticles by the co-precipitation method. Polyvinyl alcohol with different mole ratios to titanium ion (1:3, 1:2, 1:1) was used as a capping agent. Products were examined by X-ray diffraction patterns and scanning electron microscopy analyses. X-ray diffraction patterns confirmed the formation of the KTP structure. The biggest (56.36nm) and smallest (39.42nm) grain size were obtained by 1:3 and 1:1 mole ratios of capping agent, respectively. Dumbly, spherical and polyhedral forms of KTP nanoparticles were observed by the change in capping agent mole ratio. The narrowest size distribution of KTiOPO4 nanoparticles was obtained at 1:1 mole ratio of capping agent. Doi: 10.28991/HIJ-2020-01-04-06 Full Text: PDF
Highlights
Potassium titanyl phosphate (KTiOPO4 or KTP) single crystals are excellent nonlinear optical materials [1,2,3]
We report a low-temperature aqueous solution based co-precipitation method for the synthesis of KTP nanoparticles and selected polyvinyl alcohol (PVA) as capping agents
X-Ray Diffraction Studies Figure 2 shows the X-ray diffraction (XRD) patterns of KTP nanoparticles synthesized without using capping agent and with different mole ratios of PVA as capping agent after calcination at 700 ̊C
Summary
Potassium titanyl phosphate (KTiOPO4 or KTP) single crystals are excellent nonlinear optical materials [1,2,3] They have important technological applications in laser frequency mixing and waveguides [4]. A study on the growth conditions of KTP single crystals to improve in their properties for different applications [7,8,9], especially for SHG, was started in the late nineteenth century These crystals are industrialized, but there are a few reports of the same studies on KTP nanocrystalline. Sol-gel, and pechini are primitive methods for the synthesis of KTP nanoparticles Among these methods, there are problems such as expensive raw materials, the presence of OH− ions in products, and weakness in the shape control of nanoparticles
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