Effects of silver nanoparticles on the fluidity of bilayer in phospholipid liposome

Sung Hee Park; Seong Geun Oh; Ji Young Mun; Sung Sik Han

doi:10.1016/j.colsurfb.2005.06.002

Effects of silver nanoparticles on the fluidity of bilayer in phospholipid liposome

Sung Hee Park, Seong Geun Oh, Ji Young Mun, Sung Sik Han

Honorary professors

Research output: Contribution to journal › Article › peer-review

83 Citations (Scopus)

Abstract

This paper describes the formation and characterization of liposome entrapping the silver nanoparticles in bilayer. Silver nanoparticles were entrapped in the bilayer of dipalmitoylphosphatidylcholine (DPPC) liposome, named as silver-loaded liposome. Specifically, above the gel to liquid-crystalline phase transition temperature of this lipid (i.e., 41°C), it was observed that membrane fluidities of silver-loaded liposomes were increased, and fluorescence anisotropy values were reduced from 0.114 to 0.097. This might be due to the structural modifications and interactions between DPPC molecules and silver nanoparticles within the bilayer. It was also confirmed that silver nanoparticles were entrapped in hydrophobic region of lipid bilayer with transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) measurements.

Original language	English
Pages (from-to)	117-122
Number of pages	6
Journal	Colloids and Surfaces B: Biointerfaces
Volume	44
Issue number	2-3
DOIs	https://doi.org/10.1016/j.colsurfb.2005.06.002
Publication status	Published - 2005 Aug

Keywords

Bilayer
Liposomes
Membrane fluidity
Silver nanoparticle

ASJC Scopus subject areas

Biotechnology
Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

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abstract = "This paper describes the formation and characterization of liposome entrapping the silver nanoparticles in bilayer. Silver nanoparticles were entrapped in the bilayer of dipalmitoylphosphatidylcholine (DPPC) liposome, named as silver-loaded liposome. Specifically, above the gel to liquid-crystalline phase transition temperature of this lipid (i.e., 41°C), it was observed that membrane fluidities of silver-loaded liposomes were increased, and fluorescence anisotropy values were reduced from 0.114 to 0.097. This might be due to the structural modifications and interactions between DPPC molecules and silver nanoparticles within the bilayer. It was also confirmed that silver nanoparticles were entrapped in hydrophobic region of lipid bilayer with transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS) measurements.",

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