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Effect of Dysprosium-Doped Nanoparticles on Structural, Thermal, and Optical Properties of Liquid Crystalline p-(n-Heptyloxy) Benzoic Acid
Abstract
This study probes into the structural, thermal, and optical transformations induced in liquid crystalline p-(n-heptyloxy) benzoic acid (7-OBA) by dispersion of dysprosium-doped lithium zinc phosphate nanoparticles [Li4Zn(PO4)2:Dy3+] (DLZP-NPs) via the thermal combustion method. X-ray diffraction confirmed the successful incorporation of DLZP-NPs, maintaining the inherent liquid crystalline structure of 7-OBA. Detailed morphological studies using scanning electron microscopy revealed a uniform dispersion of nanoparticles, while energy-dispersive X-ray spectroscopy verified the consistent presence of Dy3+ ions throughout the matrix. Fourier-transform infrared spectroscopy identified functional groups within the nanocomposites, with distinct shifts in the stretching regions of C=O, C=C, and C-H bonds, indicative of molecular interactions between the 7-OBA matrix and the nanoparticles. These shifts suggest a reorganization of the molecular environment, facilitated by the synergistic effects of DLZP-NPs. Thermal and phase transition behaviors of the nanocomposites were examined using differential scanning calorimetry and polarized optical microscopy, which highlighted subtle yet significant alterations in phase transition temperatures and liquid crystalline textures. Optical absorption studies revealed a reduction in the energy bandgap of 7-OBA from 3.97 to 3.64 eV with increasing nanoparticle concentrations, emphasizing the potential for bandgap tuning. Spectroscopic ellipsometry further demonstrated a decrease in optical permittivity with increased nanoparticle dispersion, reflecting modifications in electronic polarizability.
Keywords
liquid crystalline p-(n-heptyloxy) benzoic acid,
dysprosium,
X-ray diffraction,
scanning electron microscopy,
Fourier-transform infrared spectroscopy,
differential scanning calorimetry,
polarized optical microscopy
Supporting agencies: The authors are grateful to the Advanced Analytical Laboratory, Andhra University and GITAM University, Visakhapatnam for providing characterization facilities.
About the Authors
R. Trisanjya
Andhra University
India
India
LCNC Laboratory, Department of Physics.
Visakhapatnam
A. E. Mwakuna
Andhra University
India
India
Abely E. Mwakuna - LCNC Laboratory, Department of Physics.
Visakhapatnam
Ch. Ravi Shankar Kumar
GITAM University
India
India
Department of Physics, School of Science.
Visakhapatnam
P. Jayaprada
Dhanekula Institute of Engineering and Technology
India
India
Department of Physics.
Vijayawada
M. S. Rao
Andhra Loyola College
India
India
Department of Physics.
Vijayawada
R. K.N.R. Manepalli
Andhra University
India
India
LCNC Laboratory, Department of Physics.
Visakhapatnam
References
1. H. K. Bisoyi, S. Kumar, Chem. Soc. Rev., 40, 306–319 (2011).
2. S. Gauza, C. H. Wen, S. T. Wu, N. Janarthanan, C. S. Hsu, J. Appl. Phys., 43, 7634–7638 (2004).
3. G. K. Auernhammer, J. Zhao, B. Ullrich, D. Vollmer, Eur. Phys. J. E, 30, 387–394 (2009).
4. T. Hegmann, H. Qi, B. Kinkead, V. M. Marx, H. Girgis, P. A. Heiney, Can. J. Met. Mater. Sci., 48, No. 1, 1–8 (2009).
5. A. K. Misra, A. K. Srivastava, J. P. Shukla, R. Manohar, Phys. Scr., 78, No. 6, 065602 (2008).
6. J. P. F. Lagerwall, G. Scalia, Curr. Appl. Phys., 12, 1387–1412 (2012).
7. M. Gao, K. Li, Y. Yan, S. Xin, H. Dai, G. Zhu, C. Wang, J. Mol. Struct., 1228, 129471 (2021).
8. R. A. Gharde, M. S. Pradhan, S. A. Mani, J. R. Amare, Int. J. Chem. Phys. Sci., 3, 78–82 (2004).
9. P. P. Chandel, V. Singhmm, R. Manohar, Trans. Electr. Electron., 17, No. 2, 69–78 (2016).
10. Y. A. Garbovskiy, A. V. Glushchenko, Phys. Solid State, 62, 1–74 (2010).
11. J. P. F. Lagerwall, G. Scalia, Liq. Cryst. Touday, 26, No. 4, 126–127 (2017).
12. A. Naveen, M. Venkateswarlu, M. V. V. K. Srinivas Prasad, N. Chandana, K. Venkateswara Rao, G. Chandana, Y. Ramakrishna, G. Giridhar, Biointerf. Res. Appl. Chem., 14, No. 3, 65(1–11) (2024).
13. V. N. Vijayakumar, S. S. Chakravarty, S. Sundaram, T. Chitravel, V. Balasubramanian, R. Sukanya, A. Tharani, J. Mol. Struct., 1316, No. 15, 138819 (2024).
14. J. C. Nie, J. Y. Yang, P. Piao, H. Li, Y. Sun, Q. M. Xue, C. M. Xiong, R. F. Dou, Q. Y. Tu, Appl. Phys. Lett., 93, No. 17, 173104 (2008).
15. B. D. Viezbicke, S. Patel, B. E. Davis, D. P. Birnie, Phys. Status Solidi B, 252, No. 8, 1700–1710 (2015).
16. H. S. Liu, H. S. Chin, S. W. Yung, Mater. Chem. Phys., 50, No. 1, 1–10 (1997).
17. M. Shwetha, B. Eraiah, J. Non-Cryst. Solids, 555, 1206221 (2021).
18. S. Debnath, S.K. Saxena, V. Nagabhatla, Catal. Commun., 84, 129–133 (2016).
19. K. Sankarranarayanan, C. Kavitha, M. L. N. Madhu Mohan, Optik, 143, 42–58 (2017).
20. T. Kato, P. G. Wilson, A. Fujishima, J. M. J. Fréchet, Chem. Lett., 19, No. 11, 2003–2006 (1990).
21. V. Balasubramanian, V. N. Vijayakumar, T. Vasanthi, Braz. J. Phys., 53, No. 2, 36–50 (2023).
22. J. Reins, E. H. Korte, A. Röseler, Appl. Phys. A, 234, No. 1-2, 486–490 (1993).
23. N. Pankaj Kumar, K. K. Raina, Opt. Mater., 34, No. 11, 1878–1884 (2012).
24. S. Delice, M. Isik, N. M. Gasanly, N. H. Darvishov, V. E. Bagiev, Optik, 262, 169356 (2022).
25. Y. K. Chang, P. C. Wu, W. Lee, J. Mol. Liq., 405, No. 15, 125084 (2024).
26. G. Chauhan, P. Malik, A. Deep, J. Mol. Liq., 376, No. 15, 121406 (2023).
Review
For citations:
Trisanjya R., Mwakuna A.E., Ravi Shankar Kumar Ch., Jayaprada P., Rao M.S., Manepalli R.K. Effect of Dysprosium-Doped Nanoparticles on Structural, Thermal, and Optical Properties of Liquid Crystalline p-(n-Heptyloxy) Benzoic Acid. Zhurnal Prikladnoii Spektroskopii. 2025;92(4):565.
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