International Journal of Physics and Research (IJPR) ISSN 2250-0030 Vol. 3, Issue 3, Aug 2013, 97-100 © TJPRC Pvt. Ltd.
OPTICAL CHARACTERIZATION OF GEL GROWN ZINC TARTRATE CRYSTAL R. G. VIDHYA1, R. RAMASAMY2 & L. VIJAYALAKSHMI3 1
Associate Professor, Department of Physics, Shrimati Indira Gandhi College, Thiruchirapalli, Tamil Nadu, India
Assistant Professor, PG & Research Department of Physics, National College, Thiruchirapalli, Tamil Nadu, India 3
Principal, Auxilliam College, Pudukottai, Tamil Nadu, India
ABSTRACT The present technological day runs for efficient NLO matrials with good optical characteristics.These materials allow manipulation of the fundamental properties of laser light beams. The data storage device require improved NLO materials. It is useful in communication technology. In recent years the growth of tartrate single crystals has become popular among research workers because of ferroelectric non-linear optical and spectral characteristics. The zinc tartrate single crystal is grown in silica gel by single diffusion method . Gel method is used to grow this tartrate crystal because the gel medium provides effective alternative method to grow these crystals near ambient temperature(Henisch. 1973). The optical property of these crystals are studied by FTIR and UV analysis. The grown crystals show optical transparency in visible region.
KEYWORDS: Gel Method, Tartrate, Zinc, UV, FTIR, Single Diffusion INTRODUCTION Non-linear optics is one of the vital cores of recent scientific advancements and it continues to be so far future research work. Non-linear optics has stirred many phenomena like fabrication of new non-linear materials, harmonic generations, optical solitons etc. which find an immence application ranging from High data transmission in optical communication switching amplifiers, pulse shaping, pulse compression etc.Wherever there is a need for large volumes of single crystals, the solution growth method provides an easier platform of growing such crystals(N.Zaitseva et al 2011).Normally we characterize a material by the standards of crystallizing capacity, mechanical electrical and optical properties(A.Stanculescu 2004). Zinc is an essential trace element of humans,animals,plants and micro organism. In this paper the growth and characterization of zinc tartrate cryatal are discussed. Experimental Work The stock solution of 1.05gm/cc is prepared(Sawant 2011). Tartaric acid is added with stock solution to form a gel. Gel formation is found within 24 hours. 1M zinc bromide solution is added over the gel. Crystals of zinc tartrate are formed over the period of 10days. The PH is maintained. Characterization FTIR Analysis The two strong peaks at 3880.14cm-13409.29 cm-1 are due to O-H stretching mode and –CH3.The vibrations of the light atoms in the terminal groups are of high frequency(Banwell 1972). The very sharp and intense absorption at 1608.35 cm-1 corresponds to C=O stretch of carbonyl group. The strong peak at 1390.33 cm-1 indicates gamma C=O symmetric and del (0-C=O) mode. 1109.07 cm-1 is due to out of plane O-H deformation and C-O stretching. The peak at 726.48 cm-1 is due to zinc-oxygen.The vibrations of the heavy at oms –C-Zn are low in frequency.
R. G. Vidhya, R. Ramasamy & L. Vijayalakshmi
The qualitative analysis on the crystal has been carried by using FTIR spectrophotometer. The recorded spectrum is shown in the figure 1 ACIC St. Josep h' s Colleg e ( Autono mous ) T ric h y-2
FT IR S PECT RUM Date: 2/8/20 12 Sp ec trum Name: IR-Ca. sp 100. 0
0. 0 4000. 0
IR-Ca. pk IR-Ca. sp
4 000. 00
40 0. 00
REF 4 000 66 .7 2 2000 6 1. 06 600 38 80. 14 51. 45 340 9. 29 30. 69 13 03. 10 48. 14 110 9. 07 43. 18
100 .0 0
2291 .2 0 6 4. 02 726. 48 52. 05
4 .0 0
1 608. 35
29 .2 4
13 90. 33
Figure 1 UV Analysis The transmittance of a crystals was measured in the region190 to 1100nm. The recorded spectrum shows good transmission. The absorption is only at 196 nm and 194 nm. The absorption percentage is 0.02%. The transparency is only in the region 327nm to 1100nm. The transparent nature in a visual region is a desired property of NLO (non-linear optical material). The absorption in the near ultraviolet region arises from electron transition . ACIC St.Jo sep h' s Colle ge( Auton omo us) T rich y-2 Date: 2/8 /2 01 2 UV sp ectru m Spe ctru m Na me: IG-CA.SP 100.0 95 90 85 327.97,93.880 334.81,95.576 80 75 70 65 60 55 50 %T 45 40 35 30 25 20 15
10 5 0.0 190.0
Instrument Model: Lambda 35
Figure 2: Transmission ACIC St.Jo sep h' s Colle ge( Auton omo us) T rich y-2 Date: 2/8 /2 01 2 UV sp ectru m Spe ctru m Na me: IG-CA.SP 1.50 1.4 1.3
1.1 1.0 0.9 0.8 A
0.7 0.6 0.5 0.4 327.97,0.027425 0.3 0.2 338.10,0.022200
0.1 0.00 190.0
Instrument Model: Lambda 35
Figure 3: Absorption
CONCLUSIONS It was founded the speed of formation depends upon the concentration.(Joshi 2005) .The size of the crystal also varies with concentration of zinc tartrate solution. The crystals formed are blue in colour. They are very hard. A large number of crystals formed near the interface were found to be small in size. This due to the fact that formation of more nucleation results in the growth of small crystals. Crystals large in size were obtained near the bottom of the test tubes. The experimental results are compared with the journal.
Optical Characterization of Gel Grown Zinc Tartrate Crystal
ACKNOWLEDGEMENTS The authors are thankful to the staff members of instrumentation lab, St.Joseph’s Colledge , Trichy for helping us to carry out FTIR and UV studies. The authors like to thank the management authorities and department of physics of Shrimati Indira Gandhi College for the constant encouragement to carry out this work in crystal growth.
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