Mechanical Studies of Pure and L-Lysine Doped Ammonium Dihydrogen Phosphate Single Crystal

Patle, S.; Rewatkar, K. G.

doi:10.1166/jap.2017.1353

Cited by 2 publications

(1 citation statement)

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“…This can be correlated with the observations of the XRD study, which shows a decrease in the volume of the crystal lattice for the doping of L-lysine. The reduction in volume corresponds to minimum surface energy and hence a more stable lattice; as a result, crystals offer higher mechanical strength compared to pure ADP [51]. It is also noticed that up to 100 gm, no cracks have been observed in doped crystals.…”

Section: Vickers's Microhardness Analysismentioning

confidence: 95%

Investigation of Physiochemical Impact of Organic Molecule L-Lysine on Ammonium Dihydrogen Phosphate Single Crystal for Optoelectronics Applications

2023

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Ammonium dihydrogen phosphate (ADP) single crystals along with the incorporated 0.5 and 1% L-lysine, an organic molecule which possesses a good nonlinear response, were grown with the vision to meet the requirements of the optoelectronic industry. The inclusion of the L-lysine molecule in the crystal was confirmed by the XRD and EDX. The experiment not only confirms the inclusion level of the impurity but also the capability of the amino acid molecule to bond hydrogen within the crystal facet. A minor decrease in lattice parameters was reported for all ADP: L-lysine crystals compared with pure ADP. The structures of the grown crystals were identified as tetragonal with the space group I42d by the single-crystal XRD analysis. Vibrational signatures and functional groups were confirmed using FTIR spectroscopy. The thermal stability and decomposition temperatures of 0.5 and 1% L-lysine-added crystals were measured by TG/DTA and found to be 203 °C and 207 °C, respectively. The UV–visible transmission spectra prove a higher transparency for doped crystals as compared to pure crystals; therefore, these doped crystals can be considered the best option for the frequency doubling process in a broad range of visible and near-IR spectra. The improved hardness of the doped crystals was confirmed by the Vickers hardness data. The nonlinear optical (NLO) behaviour investigated using a second-harmonic generation (SHG) technique, indicating an efficient quadratic nonlinear coefficient of ADP: Lysine crystals at a 1064 nm initial wavelength, shows about 1.5-fold higher efficiency compared with undoped ADP.

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Section: Vickers's Microhardness Analysismentioning

confidence: 95%