A comparative study on pure, l-arginine and glycine doped ammonium dihydrogen orthophosphate single crystals grown by slow solvent evaporation and temperature-gradient method

Pattanaboonmee, Nakarin; Ramasamy, P.; Yimnirun, Rattikorn; Manyum, P.

doi:10.1016/j.jcrysgro.2010.11.061

Cited by 34 publications

(7 citation statements)

References 36 publications

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“…According to Miller rule, the lower value of dielectric constant at higher frequencies is a suitable parameter for the enhancement of SHG coefficient [21,22]. The low dielectric loss with high frequency for a given sample suggests that the sample possesses enhanced optical quality with lesser defects and this parameter is of vital importance for nonlinear optical materials [23,24]. In the case of boron doped ADP there is an appreciable decrease in dielectric constant value compared to pure ADP suggesting the possibility of realizing ADP crystals with low ε r value.…”

Section: Dielectric Studiesmentioning

confidence: 99%

Dielectric and Optical Characterization of Boron Doped Ammonium Dihydrogen Phosphate

Zion¹,

Devarajan²,

Arunachalam³

2013

JCPT

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Single crystals of pure and boron doped ammonium dihydrogen phosphate were grown from aqueous solution by slow solvent evaporation process. ICP studies were done to confirm the presence of the dopant boron in the parent crystal. The values of the lattice parameters were determined by single crystal X-ray diffraction. The pure and doped ADP crystals were found to have tetragonal structure. Complete optical characterizations of the crystals were done using the FTIR, UV-Vis and NLO studies. The presences of the various functional groups in the crystals were identified by FTIR spectrum. The band gap energies of the pure and doped crystals have been calculated at their cut off frequencies using the UV-Vis spectrum. The second harmonic generation efficiency of the crystals was determined. The electric properties of the grown crystal have been analyzed by studying the variation of dielectric constant and dielectric loss with frequency.

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Section: Dielectric Studiesmentioning

confidence: 99%

Dielectric and Optical Characterization of Boron Doped Ammonium Dihydrogen Phosphate

Zion¹,

Devarajan²,

Arunachalam³

2013

JCPT

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“…In literature anisotropic studies of L-alanine, glycine, L-arginine and D L -malik acid doped ADP crystal has been reported [8][9][10]. The influence of L-lysine monohydrochloride dihydrate on the growth and properties of ADP single crystal have been reported by P. Rajesh et al [11].…”

Section: Introductionmentioning

confidence: 97%

Investigation on the Linear and Nonlinear Optical Properties of L-Lysine Doped Ammonium Dihydrogen Phosphate Crystal for NLO Applications

Shaikh¹,

Anis²,

Shirsat³

et al. 2014

IOSRJAP

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In present investigation L-lysine doped ADP crystal has been grown by slow evaporation technique. The crystalline nature of the grown crystal was confirmed using powder X-ray diffraction technique. The optical studies were carried to examine optical transparency and determine the optical constants of the grown crystal quenching the optoelectronics applications. The optical band gap of grown crystal is found to be 4.7eV. The third order nonlinear behaviour has been investigated using Z-scan technique at 632.8 nm. The nonlinear third order susceptibility of grown crystal is found to be 1 .578 x 10-5 esu. The nonlinear index of refraction and absorption coefficient were determined to explore the optical limiting applications of the grown NLO crystal. The kurtz powder test confirmed the second harmonic generations by the grown crystal.

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“…These changes could be due to the rearrangement of bindings between Ca 2+ and COO – group of adsorbed amino acid as well as PO 4 3– and NH 3 + after the sterilization cycle. Given after the sterilization cycle the amino acid content of AA‐HA samples showed no appreciable loss and the ζ values remained unaffected, and the decomposition temperature of Arg and Glu are above 200°C, which are higher than autoclave temperature, it is concluded that desorption of amino acids due to moist heat sterilization, if any, is negligible.…”

Section: Discussionmentioning

confidence: 93%

Osteoblast response to the surface of amino acid‐functionalized hydroxyapatite

Lee

Loo

Chrzanowski

et al. 2014

J Biomedical Materials Res

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Interactions between proteins and the surface of biomaterials are crucial for the biological function and success of materials implanted in the human body. In this study, hydroxyapatite (HA) with negative and positive surface charges were fabricated by functionalizing the HA surface with acidic or basic amino acids. The influence of HA surface charge on protein adsorption and cell activities was studied. The crystallinity, morphology, and surface charge of amino acid-functionalized HA (AA-HA) particles and the stability of amino acids on the HA surface were determined. Both AA-HA and unmodified HA were studied for their capacity to adsorb proteins present in biological medium. The results showed that the presence of glutamic acid; Glu (acidic amino acids) and arginine; Arg (basic amino acids) on the HA surface resulted in higher protein adsorption owing to stronger electrostatic attraction between the HA particles and the proteins in medium. Functionalizing HA with Glu and Arg significantly promoted osteoblast adhesion on the surface of treated HA. No significant differences in cell proliferation between negatively and positively charged HA was observed. Significantly higher alkaline phosphatase (ALP) activity of osteoblasts on both charged surfaces was seen as compared to the unmodified HA. The study demonstrated that immobilization of amino acids (Glu and Arg) on the surface of HA promoted osteoblast proliferation and ALP activity.

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A comparative study on pure, l-arginine and glycine doped ammonium dihydrogen orthophosphate single crystals grown by slow solvent evaporation and temperature-gradient method

Cited by 34 publications

References 36 publications

Dielectric and Optical Characterization of Boron Doped Ammonium Dihydrogen Phosphate

Dielectric and Optical Characterization of Boron Doped Ammonium Dihydrogen Phosphate

Investigation on the Linear and Nonlinear Optical Properties of L-Lysine Doped Ammonium Dihydrogen Phosphate Crystal for NLO Applications

Osteoblast response to the surface of amino acid‐functionalized hydroxyapatite

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