Chemical Durability and Anti-Microbial Property of Silver-Doped Colloidal Silica

Abstract:

Silver-doped silica gel was prepared by the reaction of colloidal silica and AgNO3. In the synthetic process, aluminum ions promote the chemical durability of silver-doped silica gel with dramatically decreasing the elusion of silica ions at the aqueous solution. Especially, aluminum ions induce slow release silver ion of silver-doped silica gel over a long period of time. Also, antimicrobial effects evaluated using a shake flask method resulted in a disinfection ratio of Staphylococcus aureus(ATCC 6538) and Escherichia coli(ATCC 25922) of over 99.9%, indicating high anti-microbial properties.

• Periodical: Solid State Phenomena (Volumes 124-126)
• Pages: 1209-1212
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.124-126.1209
• Online since: June 2007
• Authors: Byung Bae Mun, Ho Kun Kim, Jin Koo Park
• Keywords: Antimicrobial Effect, Chemical Durability, Colloidal Silica, Silver, Sol-Gel Method

References

[1] Mennig M, Schmitt M, Schmidt H, J Sol-Gel Sci Technol, 8(1997)1035-42.

[2] Noriaki M, Hideo H, Appl phys Lett , 63(1993)2050-2.

[3] Magudapathy P, Gangopadhyay P, Panigrahi BK, Nair KGM, Dhara S. Physica B 299(2001) 142-6.

[4] Tanahashi I, Yoshida M, Manabe Y Tohda T. J Mater Res 10(1995)362-5.

[5] M. Kawashita et al. Biomaterials 21(2000)393-398.