AAAR 37th Annual Conference October 14 - October 18, 2019 Oregon Convention Center Portland, Oregon, USA
Abstract View
Steady Uniform Production of Ultrasmall Particles via Tandem Electrostatic System for Precise Antimicrobial Activities
DAE HOON PARK, Jungho Hwang, Jeong Hoon Byeon, Yonsei University, Korea
Abstract Number: 421 Working Group: Nanoparticles and Materials Synthesis
Abstract Simultaneous improvement in on-demand and precise controls on material processing are critical for newly developed nanomaterials. On-demand production is receiving great interest in the realization of nanotechnologies that meet unpredictable demands of reconfiguration and modification to maximize the efficacy of materials processing. Precise control of characteristics and functionalities of materials is also receiving great interest in ensuring guaranteed efficacies and maximizing cost efficiencies. Antimicrobial nanomaterials are representatively subjects of these approaches, because they require built-to-order configurations with their stable antimicrobial efficacies for practical uses. Recent attempts to control characteristics of materials precisely have employed on-demand production systems. Consequently, developing a digitizable platform for the plug-in manufacture of ultrasmall (atomically countable) Ag or Cu particles including characteristics and antimicrobial activities of materials simultaneously was recently introduced. In this study, a tandem electrostatic system consisting of a carbon brush ionizer and a spark ablation device was developed. The spark ablation with gaseous ion injection between Ag or Cu rods was carried out to ensure the steady and uniform manufacture of ultrasmall Ag or Cu particles (~3 nm). The resulting particles had stronger and more stable antibacterial activities against bacteria (including multidrug-resistant strains) than Ag or Cu nanoparticles (>10 nm).