Silver nanoparticles and silver ions stabilized in NaCl nanocrystals |
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| Institution: | 1. Departamento de Investigación en Física, Universidad de Sonora, Apdo. Postal 5-88, 83190 Hermosillo, Sonora, Mexico;2. CONACYT - Departamento de Investigación en Física, Universidad de Sonora, Apdo. Postal 5-88, 83190 Hermosillo, Sonora, Mexico;3. Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Apdo. Postal 5-88, 83190, Hermosillo, Sonora, Mexico;4. Departamento de Ingeniería Química y Metalurgia, Universidad de Sonora, Rosales y Luis Encinas S/N, Hermosillo, Sonora, Mexico;5. Departamento de Física, Universidad de Sonora, Apdo. Postal 5-88, 83190, Hermosillo, Sonora, Mexico;6. Universidad Autónoma del Estado de Hidalgo, Centro de Investigaciones Químicas Carretera Pachuca,Tulancingo Km 4.5, Mineral de la Reforma, Hidalgo CP 42183, Mexico;7. Centro de Investigación y de Estudios Avanzados del I.P.N, Unidad Querétaro, Apdo. Postal 1-798, 76001 Querétaro, Qro, Mexico;1. Programa de Pós-Graduação em Materiais, Universidade Federal de Alagoas, 57072-970 Maceió, AL, Brazil;2. Departamento de Física, Universidade Federal de Sergipe, Cidade Universitária Prof. José Aloísio de Campos, Rod. Marechal Rondon s/n, Jardim Rosa Elze, São Cristóvão, SE 49.100-000, Brazil;3. Instituto de Física, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, RS, Brazil;1. College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;2. School of Physics, Shandong University, Jinan 250100, China |
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| Abstract: | This study presents a two-step synthesis of nanoparticles and the stabilization process of Ag ions in the matrix of NaCl nanocrystals. Ag+ ions are incorporated to NaCl with a new and attractive method that can be easily used for the different types of alkaline halides. The nanoparticles with predominant size found between 10 and 15 nm were stabilized on the surface and/or interior of NaCl nanocrystals using, in the first stages, the ionic-exchange property of zeolite A4. The optical properties of the materials were characterized through optical absorption, leading to well defined absorption bands located in the wave length values between 217–275 nm and 350–770 nm approximately, for Ag+ and AgNp, respectively. The antibacterial property of Ag ions and nanoparticles stabilized in NaCl was analyzed against gram-negative Escherichia Coli and Klebsiella bacteria. In order to quantify the antibacterial effect of Ag ions and nanoparticles the inhibition ratio was used as a parameter on the bacteria colonies grown in culture medium by conventional methods. Ag+ ions that were stabilized in NaCl nanocrystals show a mayor inhibition ratio in contact with Klebsiella bacteria, conversely Ag nanoparticles showed better results in contact with E. coli. |
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| Keywords: | Green synthesis AgNp antibacterial activity |
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