Quantifying the Polymeric Capping of Nanoparticles with X-Ray Photoelectron Spectroscopy.

Eden E L TannerStanislav V SokolovKamonwad NgamchueaRobert G PalgraveRichard G Compton

Published in: Chemphyschem : a European journal of chemical physics and physical chemistry (2018)

X-ray photoelectron spectroscopy was used to characterise silver nanoparticles capped with poly(ethylene) glycol (PEG) in a room-temperature ionic liquid (RTIL), 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4 ]). The amounts of oxygen and silver present in nanoparticles capped with different molecular weight thiolated PEG chains were monitored, and the number of thiolated PEG chains per nanoparticle was calculated, an in situ characterisation not previously possible.

Keyphrases

ionic liquid
room temperature
silver nanoparticles
high resolution
drug delivery
single molecule
dual energy
cancer therapy
drug release
mass spectrometry
solid state
computed tomography
walled carbon nanotubes
electron microscopy
magnetic resonance imaging
magnetic resonance