Crystalline fiber growth of dye-doped l-arginine phosphate by the laser-heated pedestal growth technique

Laser heated pedestal growth and characterization of the crystalline fibers of KDP doped L-arginine phosphate

“…This composition is similar to that of undoped LAP grown by solution technique [14] indicating that the structural features of KDP dope LAP are identical to that of undoped LAP. Similar observation were reported in case of LAP doped with Li [11] and Rd6G [12] as well as in KDP doped with LAP [15]. (iii) Room temperature FTIR spectra in 400-4000 cm À 1 region were recorded with Bruker Optics USA Model Vertex70 spectrophotometer using the KBr pellet ( $ 1wt % sample) method.…”

“…Hameed et al [10] observed a decrease (compared to undoped LAP) in the decomposition temperature of KF doped LAP. Similar behavior has been reported in case of Li + doped LAP [11] Singh et al [12] reported an increase in the decomposition temperature of LAP when doped with Rd6G dye. They have shown that the dye doped LAP has almost no weight loss in 25-2001C range and have been able to grow crystalline fibers from the melt.…”

“…Crystalline fibers of KDP: LAP were grown by laser heated pedestal growth (LHPG) technique using a CW CO 2 laser based setup described elsewhere [12] The sample rods (2 Â 2 Â 25 mm 3 ) required for LHPG setup were prepared from the powder obtained by crushing the crystals obtained by solution growth. Equi-molar quantities of L-arginine and orthophosphoric acid were dissolved in de-ionized water at 601C.…”

Laser Floating Zone Growth: Overview, Singular Materials, Broad Applications, and Future Perspectives

“…Finally, it is very important to highlight a couple of works reporting the LFZ growth of crystalline L-arginine phosphates (LAP), in essence, the production of crystalline structures of organic molecules [120,121]. Singh et al in 2008 [120] reported the production of~1-mmdiameter transparent crystalline fibers of rhodamine-6G (Rd6G)-doped L-arginine by LFZ, applying a very low laser power of 4 W at 36 mm/h growing speed over pressed rods of fully reacted precursor compounds.…”

“…A least explored aspect of LFZ entails the possibility of producing organic complex molecules in the form of crystalline fibers [120,121]. As suggested by the results reviewed above, a wide range of opportunities to explore bio-compatible applications may be envisioned.…”