The Fluorescence Behavior and Stability ‎of AgNPs Synthesized by Juglans Regia ‎Green Husk Aqueous Extract

Document Type : Research Paper

Authors

Department of Biotechnology, Faculty of Biological sciences, Alzahra University, Tehran, Iran.

Abstract

   Particles with the size of 1-100 nm are known as nanoparticles (NPs). The widespread use of silver NPs (AgNPs) makes it familiar in different industries. They have unique properties as a result of their high surface to volume ratio, although aggregation of NPs interferes with their functions. This phenomenon has several side effects on the environment, the amount of which may depend on the stability of AgNPs. Stability of colloids depends on various agents, such as capping agents and environmental conditions, including pH and ionic strength. In this study, the effects of a variety of electrolytes, such as NaCl (10mM), NaNO3 (10 and 100mM), andCa (NO3)2 (10mM)at different values of pH were investigated on the aggregation of AgNPs synthesized using an aqueous extract of dried Juglans regia green husk. In NaNO3 10mM pH 9, NPs were more stable than in other media. Therefore, the special optical and electronic properties of AgNPs in such a medium as well as in water were investigated. The UV-visible extinction spectra of AgNPs in both water and NaNO3 (10 mM, pH 9.0) showed a surface plasmon resonance (SPR) at 445 nm as well as a broad peak at shorter wavelengths (255 nm). The fluorescence emission spectra of AgNPs at different excitation wavelengths in the range of 245-290 nm revealed emission peaks that were red-shifted in the range of 487-580 nm by the increase in the excitation wavelength. This behavior is attributed to the existence of a variety of emission centers with different energy levels.

Keywords


  1. Keller, A., Wang, H., Zhou, D., Lenihan, H., Cherr, G., Cardinale, B., Miller, R., Ji, Z., (2010). “Stability and Aggregation of Metal Oxide Nanoparticles in Natural Aqueous Matrices”, Environ. Sci. Technol., 44: 1962-1967.
  2. Badavy, A., Luxton, T., Silva, R., Scheckel, K., Suidan, M., Tolaymat, T., (2010). “Impact of Environmental Conditions (pH, Ionic Strength, and Electrolyte Type) on the Surface Charge and Aggregation of Silver Nanoparticles Suspensions”, Environ. Sci. Technol., 44: 1260-1266.
  3. Bendersky, M., Santore, M., Davis, J., (2015). “Statistically-based DLVO approach to the dynamic interaction of colloidal microparticles with topographically and chemically heterogeneous collectors”, J. Colloid Interface Sci., 449: 443-451.
  4. Vinmathi, V., Justin Packia J., (2015). “A green and facile approach for the synthesis of silver nanoparticles using aqueous extract of Ailanthus excelsaleaves, evaluation of its antibacterial and anticancer efficacy”, Bull. Mater. Sci., 38: 625-628.
  5. Singh, A. K., Srivastava, O. N., (2015). “One step Green Synthesis of Gold Nanoparticles Using Black Cardamom and Effect of pH on Its Synthesis”, Nanoscale Research Letters, 10: 353-365.
  6. Sutradhar, P., Saha, M., (2015). “Synthesis of zinc oxide nanoparticles using tea leaf extract and its application for solar cell”, Bull. Mater. Sci., 38: 653-657.
  7. Basak, D., Karan, S., Mallik, B., (2006). “Size selective photoluminescence in poly (methyl methacrylate) thin solid films with dispersed silver nanoparticles synthesized by a novel method”, Chem. Phys. Lett., 420: 115-119.
  8. Parang, Z., Keshavarz, A., Farahi, S., Elahi, S. M., Ghoranneviss, M., Parhoodeh, S., (2012). “Fluorecence emission spectra of silver and silver/cobalt nanoparticles”, Sci. Iran., Trans. F, 19: 943-947.
  9. Wiley, B. J., Im, S. H., Li, Z. Y., McLellan, J., Siekkinen, A., Xia, Y.,(2006). “Maneuvering the surface plasmon resonance of silver nanostructures through shape-controlled synthesis”, J. Phys. Chem. B., 110: 15666-15675.
  10. Jian, Z., Xian,g Z., Yongchang, W., (2005). “Electrochemical synthesis and fluorescence spectrum properties of silver nanospheres”, Microelectron. Eng., 77: 58-62.
  11. Siwach, O. P., Sen, P., (2009). “Fluorescence properties of Ag nanoparticles in water, methanol and hexane”, J. Lumin., 129: 6-11.
  12. Siwach, O. P., Sen, P., (2008). “Synthesis and fluorescence properties of Ag nanoparticles”, Solid State Commun., 148: 221-225.
  13. Treguer, M., Rocco, F., Lelong, G., Nestour, A., Cardinal, T., Maali, A., Lounis, B., (2005). “Fluorescent silver oligomeric clusters and colloidal particles”, Solid State Sci., 7: 812-818.
  14. Gill, R., Tian, L., Somerville, W. R. C., Le Ru, E. C., Amerongen, H. V., Subramaniam, V., (2012). “Silver Nanoparticle Aggregates as Highly Efficient Plasmonic Antennas for Fluorescence Enhancement”, J. Phys. Chem. C, 116: 16687-16693.
  15. Zhu, J., Xu, Z. j., Weng, G. J., Zhao, J., Li, J. j., Zhao, J. w., (2018). “Etching-dependent fluorescence quenching of Ag-dielectric-Au three-layered nanoshells: The effect of inner Ag nanosphere”, Spectrochim. Acta, Part A, 200: 43-50.
  16. Abbasi, Z., Feizi, S., Taghipour, E., Ghadam, P., (2017). Green synthesis of silver nanoparticles using aqueous of dried Juglans regia green husk and examination of its biological properties”, Green Process Synth., 6: 477-485.
  17. Ajitha, B., Reddy, A., Reddy, P., Jeon, H., Ahn, C., (2016). “Role of capping agents in controlling silver nanoparticles size, antibacterial activity and potential application as optical hydrogen peroxide sensor”, RSC Adv., 6: 36171-36179.
  18. Shin, H., Yang, H., Kim, S., Lee, M., (2004). “Mechanism of growth of colloidal silver nanoparticles stabilized by polyvinyl pyrrolidone in γ-irradiated silver nitrate solution”, J. Colloid Interface Sci., 274: 89-94.
  19. Cosgrove, T., (2005) “Colloid science: Principles, methods and applications”, (Wiley)  New Jersey.
  20. Siwach, O. P., Sen, P., (2008). “Fluorescence properties of Ag nanoparticles in water”, Spectrochim. Acta, Part A., 69: 659-663.
  21. He, S., Chen, H., Guo, Z., Wang, B., Tang, C., Feng, Y., (2013). “High-concentration silver colloid stabilized by a cationic gemini surfactant”, Colloids Surf. A, 429: 98-105.
  22. Hevus, I., Kohut, A., Voronov, A., (2012). “Micellar assemblies from amphiphilic polyurethanes for size-controlled synthesis of silver nanoparticles dispersible both in polar and nonpolar media”, J. Nanopart. Res., 14: 1-11.
  23. Jian, Z., Yongchang, W., Yimin, L., (2004). “Fluorescence spectra characters of silver-coated gold colloidal nanoshells”, Colloids Surf. A, 232: 155-161.
  24. Soltanabad, M., Bagherieh-Najjar, M., Kohan Baghkheirati, E., Mianabadi, M., (2018). “Ag- conjugated nanoparticle biosynthesis mediated by Rosemary leaf extracts correlates with plant antioxidant activity and protein content”, Int. J. Nanosci. Nanotechnol., 14: 319-325.
  25. Abdullah, A., Annapoorni, S., (2005). “Fluorescent silver nanoparticles via exploding wire technique”, Pramana J. Phys., 65: 815-819.
  26. Olad, A., Ghazjahaniyan, F., Nosrati, R., (2018). “ A facile and green synthesis route for the production of silver nanoparticles in large scale”, Int. J. Nanosci. Nanotechnol., 14: 289-296.
  27. Edwards, A. C., Hooda, P. S., Cook, Y., (2001). “Determination of nitrate in water containing dissolved organic carbon by ultraviolet spectroscopy”, Int. J. Environ. Anal. Chem., 80:49-59.