Formation of Negatively Charged AgI Colloid Nanoparticles by Condensation


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The stability of silver halide colloids is reported to be important for the toxicological outcome. This study shows a well-suited and cheap condensation reaction to obtain negatively charged silver iodide (AgI) nanoparticles without additional stabilization agents. Charged AgI colloids were synthesized from silver nitrate and potassium iodide solutions. An excess of potassium iodide not only imparted a negative charge, but provided a narrow particle size distribution (50 ± 10 nm). The change of optical properties in the colloid was investigated by UV-VIS spectroscopy. A silver iodide exciton absorption band at peak ~421nm (2.93eV), red-shifted over time. The peak at half maximum intensity increased from 13.3nm to 14.8 nm, characterizing the dispersity of AgI colloidal particles. Colloidal particles stabilized after 33 hours. In-situ real-time UV-VIS measurements provide a tool to adjust the particle characteristics and may serve to further optimize the performance in biological applications.



Edited by:

Arturs Medvids




D. Kalnina et al., "Formation of Negatively Charged AgI Colloid Nanoparticles by Condensation", Advanced Materials Research, Vol. 1117, pp. 159-163, 2015

Online since:

July 2015




* - Corresponding Author

[1] Y. Wang, J. Mo, W. Cai, L. Yao, L. Zhang, Large-scale synthesis of ß- AgI nanocrystals, Materials Letters, 56 (2002) 502-506.


[2] J. Safaei-Ghomi, M.A. Ghasemzadeh, Silver iodide nanoparticle as an efficient and reusable catalyst for the one-pot synthesis of benzofurans under aqueous conditions, J. Chem. Sci. 125, (2013) 1003-1008.


[3] Y. Sakurai, H. Tada, K. Gonda et al., Development of silica-coated iodide nanoparticles and their biodistribution, J. Exp. Med. 228 (2012) 317-323.

[4] S. Kittler, C. Greulich, J. Diendorf et al, Toxicity of silver nanoparticles increases during storage because of slow dissolution under release of silver ions. Chem. Mat. 22 (2010) 4548–54.


[5] A.B.G. Lansdown, A Pharmacological and toxicological profile of silver as an antimicrobial agent in medical devices. Advances in Pharmacological Sciences, (2010) Article ID 910686, 16 pages.


[6] M.E. Samberg, P.E. Orndorff, N.A. Monteiro-Riviere, Antibacterial efficacy of silver nanoparticles of different sizes, surface conditions and synthesis methods. Nanotoxicology 5 (2011) 244–253.


[7] E. Navarro, F. Piccapietra, B. Wagner et al., Toxicity of silver nanoparticles to Chlamydomonas reinhardtii, Environ. Sci. Technol. 42 (2008) 8959–8964.


[8] T.M. Tolaymat, A.M. E Badawy, A. Genaidy et al., An evidence-based environmental perspective of manufactured silver nanoparticle in syntheses and applications: A systematic review and appraisal of peer-reviewed scientific papers, Sci. Total Environ. 408 (2010).


[9] S. Jacquart, R. Siadous, C. Henocq-Pigasse, et al, Composition and properties of silver-containing calcium carbonate–calcium phosphate bone cement, J. Mater Sci: Mater Med. (2013).


[10] A.M. El Badawy, R.G. Silva, B. Morris, et al., Surface charge dependent toxicity of silver nanoparticles. Environ. Sci. Technol. 45 (2011) 283-287.

[11] P. White, J. Hjortkjaer, Preparation and characterisation of a stable silver colloid for SER(R)S spectroscopy, Raman Spectrosc. 45 (2014) 32-41.

[12] B. Reidy, A. Haase, A. Luch, K.A. Dawson, I. Lunch, Mechanisms of silver nanoparticle release, transformation and toxicity: A critical review of current knowledge and recommendations for future studies and applications, Materials. 6 (2013).


[13] M. Tourbin, A. Al-Kattan, C. Drouet, Study on the stability of suspensions based on biomimetic apatite's aimed at biomedical applications. Powder Technology. 255 (2014) 17-22.


[14] Al-Kattan, P. Dufour, C. Drouet, Purification of biomimetic apatite-based hybrid colloids intended for biomedical applications: a dialysis study, Colloids and Surfaces B Biointerfaces. 82 (2011) 378-384.


[15] J. Dutta, H. Hofmann, Self –organization of colloidal nanoparticles, in: H.S. Nalwa (Ed. ), Encyclopaedia of Nanoscience and Nanotechnology, American Scientific Publisher, CA, (2004) 617-640.

[16] Vukić, Marija R.; Veselinović, Dragan S.; Marković, Vesna G, Crystalline forms of silver iodide II. Determination of phase transformations, Journal of the Serbian Chemical Society. 72 (2007) 857.


[17] D. Bharathi Mohan and C. S. Sunandana, Iodization of rf sputter induced disordered Ag thin films reveals volume plasmon-exciton transition, Journal of Applied Physics. 100 (2006), 064314-1-10.


[18] T.C. Prathna, N. Chandrasekaran, A.M. Raichur, A. Mukherjee, Biomimetic synthesis of silver nanoparticles by Citrus limon (lemon) aqueous extract and theoretical prediction of particle size. Colloids and Surfaces B: Biointerfaces. 82 (2011).


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