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Chapter IX General Conclusion<br />

case of amino acids doped KDP crystals, which indicated the<br />

interaction of dopant through hydrogen bond of KDP.<br />

8. The Thermo-gravimatric analysis suggested that amino acids doped<br />

KDP crystals were slightly less stable than pure KDP crystals. The<br />

higher values of activation energy and standard entropy of activation<br />

suggested more stable condition for pure KDP crystals than amino<br />

acids doped KDP crystals.<br />

9. The dielectric constant was found to be lower in amino acids doped<br />

KDP crystals than the pure KDP crystals, which might be due to<br />

generation of L-defects upon addition of amino acids.<br />

10.As the doping of amino acids increased, the dielectric loss of KDP<br />

crystals decreased, which indicated that the doping of amino acids did<br />

not bring major defects.<br />

11.The significant lowering of the dielectric constant on doping of amino<br />

acids can make KDP crystals good candidates for electro-optic<br />

applications.<br />

12.As the doping of amino acids increased, the SHG efficiency increased.<br />

13.The UV cut off limit decreased slightly on doping amino acids in KDP<br />

crystals, however, for L-threonine doping, it remained almost unaltered.<br />

Looking at SHG efficiency data and UV cut off limit, it could be<br />

concluded that the L-threonine doping in KDP crystals was a better<br />

option.<br />

14.In chemical etching studies by glacial acetic acid, the highest activation<br />

energy for the lateral motion of ledges of etch-pits for pure KDP was<br />

obtained compared to amino acids doped KDP crystals. This<br />

335

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