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Full Paper
Colloidal Synthesis of Gold Semishells
Article first published online: 13 MAR 2012
DOI: 10.1002/open.201200002
Copyright © 2012 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
2191-1363/asset/cover.gif?v=1&s=b2e6d4f4a685bd2fd7b39ace624127c5df2820a8 "ChemistryOpen")
Additional Information
How to Cite
Rodríguez-Fernández, D., Pérez-Juste, J., Pastoriza-Santos, I. and Liz-Marzán, L. M. (2012), Colloidal Synthesis of Gold Semishells. ChemistryOpen, 1: 90–95. doi: 10.1002/open.201200002
Publication History
- Issue published online: 25 APR 2012
- Article first published online: 13 MAR 2012
- Manuscript Received: 12 JAN 2012
Funded by
- Funded Access
- European Commission. Grant Number: CP-213948
- European Research Council. Grant Number: 267867
- Spanish Ministry of Science and Innovation (MICINN)
Keywords:
- asymmetric syntheses;
- colloids;
- Janus particles;
- semishells
Abstract
This work describes a novel and scalable colloid chemistry strategy to fabricate gold semishells based on the selective growth of gold on Janus silica particles (500 nm in diameter) partly functionalized with amino groups. The modulation of the geometry of the Janus silica particles allows us to tune the final morphology of the gold semishells. This method also provides a route to fabricating hollow gold semishells through etching of the silica cores with hydrofluoric acid. The optical properties were characterized by visible near-infrared (vis-NIR) spectroscopy and compared with simulations performed using the boundary element method (BEM). These revealed that the main optical features are located beyond the NIR region because of the large core size.