Formation of Ag Nanostrings Induced by Lyotropic Liquid–Crystalline Phospholipid Multilayer

• Published in: Langmuir Vol. 28; no. 1; pp. 259 - 263
• Main Authors: Kim, Suk J, An, Hyeun H, Lee, Seung J, Lee, Jong H, Kim, Young H, Yoon, Chong S, Suh, Sang H
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 10.01.2012
• Subjects: Chemistry; Colloidal state and disperse state; Colloids: Surfactants and Self-Assembly, Dispersions, Emulsions, Foams; Exact sciences and technology; General and physical chemistry; Membranes; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Liquid; Stability; Multilayer; Hydration; Nanoparticle; Phospholipid; Ordering; Lipids; Membrane; Particle mobility
• ISSN: 0743-7463; 1520-5827
• DOI: 10.1021/la203721c

Morphological variation of the Ag nanoparticles embedded in a lyotropic phospholipid (1,2-dioleoyl-sn-glycero-3-phosphoethanolamine, DOPE) membrane during hydration was investigated. Hydration at 5 °C resulted in transformation of the Ag nanoparticles into a bundle of Ag nanostrings as the Ag nanoparticles conformed to the HII phase of the DOPE molecules. Above 30 °C, the nanoparticles quickly coarsened into large polygonal-shaped particles since high mobility of the lipid molecules overwhelmed the tendency for the Ag nanoparticles to order. The result provided an insight into the long-term stability of nanoparticles trapped in different lipid membranes depending on the structural ordering of the molecules.