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has been cited by the following article:

• TITLE: Zinc Oxide Nanoparticles in Bacterial Growth Medium: Optimized Dispersion and Growth Inhibition of Pseudomonas putida

  AUTHORS: Manuela Vielkind, Ingo Kampen, Arno Kwade

  KEYWORDS: Bacterial Growth Medium; Optimized Dispersion; Pseudomonas putida; Zinc Oxide Nanoparticles

  JOURNAL NAME: Advances in Nanoparticles, Vol.2 No.4, October 22, 2013

  ABSTRACT: The majority of nanoparticles tend to agglomerate in bacterial growth media. Thus, nanoparticle-specific characteristics can get lost. To investigate the influence of nanoparticles on bacteria, these particles should remain in their nanoparticulate state. The present study demonstrates the stabilization of commercially available zinc oxide (ZnO) with sodiumhexametaphosphate (SHMP) in bacterial growth medium (LB) to avoid agglomeration of these particles after the addition to LB. This established method is appropriate to stabilize ZnO agglomerates as small as 43 nm. The method of fractionated centrifugation was used to obtain stable agglomerates (also stable in the presence of bacteria) with different mean diameters. The SHMP-stabilized ZnO inhibits the growth of Pseudomonas putida with increasing concentration (up to 500 mg/L) and decreasing agglomerate size (43 - 450 nm).