Unidirectional growth and characterization of l-arginine monohydrochloride monohydrate single crystals

► l-Arginine monohydrochloride monohydrate (LAHCl) single crystal was grown successfully by unidirectional solution growth method for the first time. ► High crystalline perfection was observed for UDS grown crystal compared to CS grown crystal. ► The optical transparency and mechanical stability are high for UDS grown LAHCl single crystal. ► Optical birefringence measurement on this material. ► The piezoelectric resonance frequencies observation - first time observation on this material.