Effect of ammonium malate on growth rate, crystalline perfection, structural, optical, thermal, mechanical, dielectric and NLO behaviour of ammonium dihydrogen phosphate crystals

Effect of Amino Acid Additives on Crystal Growth Parameters and Properties of Ammonium Dihydrogen Phosphate Crystals

“…Figure 11 shows the FTIR spectra of the pure ADP, ADP doped with LAHCl (1 mol%) and ADP doped with L-alanine (1 mol%). The broad band in the high energy region is due to O-H vibrations of water, P-O-H group and N-H vibrations of ammonium (Rajesh et al, 2009). The broadness is due to the hydrogen bonding interaction with adjacent molecules (Rani et al, 2011).…”

Investigations on the solubility, growth, structural, optical, mechanical, dielectric and SHG behaviour of ammonium acetate doped ammonium dihydrogen phosphate crystals

“…In order to confirm the reproducibility, several times the beam was passed through the various regions of the crystals and the same results were observed. The pure ADP has 65% transmittance [4,13,14]. The large transmission in the entire visible region enables it to be a good candidate for electro-optic and NLO applications [5,20].…”

“…After the 4 averages, the signal height was measured (peak to peak volts). Similarly, the signal height for the standard was also measured [7,13]. It is found that the SHG efficiency of the doped crystal is 0.5 time greater than pure ADP.…”

“…Ammonium chloride doped ADP has high growth rate and SHG efficiency. Compared to all, the dopants which contain ammonium improve the properties of the ADP crystals apparently [13,17,18], in which the dopants concentration was 1 mol%.…”

“…In order to overcome the problem some dopants are added to suppress the effect of metal ion impurities on ADP and KDP crystals, for example EDTA or KCl reduces the effect of metal ion impurities and enhances the metastable zone width and increases the growth rate of the crystals [11]. In our earlier papers we have reported the growth of /1 0 0S directed ADP [12] and the effect of DL-malic acid [7], L-lysine monohydrochloride [4], oxalic acid [5], ammonium malate [13], Ni 2 + [14], Co 2 + [15], L-asparagine monohydrate [16] and ammonium chloride on ADP [17,18], in which the ammonium malate doped ADP crystals, show higher crystalline perfection and growth rate. Ammonium chloride doped ADP has high growth rate and SHG efficiency.…”