Next Article in Journal
Functionalized Gold Nanoparticles and Their Biomedical Applications
Previous Article in Journal
Films, Buckypapers and Fibers from Clay, Chitosan and Carbon Nanotubes
Open AccessArticle

Metallic Nanoparticle Block Copoloymer Vesicles with Enhanced Optical Properties

Institute of Biotechnology, University of Cambridge, Tennis Court Rd, CB21QT, Cambridge, UK
Nanomaterials 2011, 1(1), 20-30; https://doi.org/10.3390/nano1010020
Received: 28 February 2011 / Revised: 8 April 2011 / Accepted: 3 May 2011 / Published: 9 May 2011
The fabrication and characterization of template silver nanoshell structures and the encapsulation of gold nanoparticles using biocompatible poly(oxyethylene)-poly(butylene) diblock co-polymer vesicles is described in this work. These vesicles have a narrow diameter size distribution around 200 nm. Silver nanoparticles (Ø = 1–10 nm) functionalized with decanethiol were successfully entrapped in the hydrophobic membrane and non-functionalized gold nanoparticles (Ø = 3.0–5.5 nm) were encapsulated in the vesicle core. Transmission Electron Microscopy confirms the localisation of the particles; silver functionalized nanoparticles appear to thicken the vesicle membrane as shown with TEM image analysis. The enhancement of the optical properties is confirmed using transmission spectrophotometry; the 430 nm plasmon resonance peak of the silver nanoparticles was replaced by a broader extinction spectrum to beyond 700 nm (O.D. = 0.8). For a number density of 4.8 x 1012 mL-1 the scattering cross section was calculated to be 0.92 x 10-4 μm2 with a scattering coefficient of 0.44 mm-1. The measurements indicate scattering cross section of 3.8 x 10-5 μm2, attenuation coefficient of 0.18 mm-1 and extinction efficiency equal to 1.2 x 10-3. Stable and biocompatible block co-polymer vesicles can potentially be used as plasmon-resonant optical contrast agents for biomedical applications. View Full-Text
Keywords: block copolymer; metallic nanoparticle; optical properties; encapsulation block copolymer; metallic nanoparticle; optical properties; encapsulation
Show Figures

Graphical abstract

MDPI and ACS Style

Martinez-Hurtado, J.L. Metallic Nanoparticle Block Copoloymer Vesicles with Enhanced Optical Properties. Nanomaterials 2011, 1, 20-30.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Search more from Scilit
 
Search
Back to TopTop