Magnetic gold nanotriangles by microwave-assisted polyol synthesis

Abstract

Simple approaches to synthesize hybrid nanoparticles with magnetic and plasmonic functionalities, with high control of their shape and avoiding cytotoxic reactants, to target biomedical applications remain a huge challenge. Here, we report a facile, fast and bio-friendly microwave-assisted polyol route for the synthesis of a complex multi-material consisting of monodisperse gold nanotriangles around 280 nm in size uniformly decorated by superparamagnetic iron oxide nanoparticles of 5 nm. These nanotriangles are readily dispersible in water, display a strong magnetic response (10 wt% magnetic fraction) and exhibit a localized surface plasmon resonance band in the NIR region (800 nm). Moreover, these hybrid particles can be easily self-assembled at the liquid-air interfaces.

Predicting the Self‐Assembly of Superparamagnetic Colloids under Magnetic Fields

“…In the case of nonspherical colloids (for example, the colloidal triangles obtained in ref. ), a single magnetic dipole is not enough to represent the magnetic response of the particle and the model requires extensions that will not be discussed in this paper.…”

Dendritic Fe3O4@Poly(dopamine)@PAMAM Nanocomposite as Controllable NO‐Releasing Material: A Synergistic Photothermal and NO Antibacterial Study

“…Combining two or more antibacterial strategies into a single system can have better antibacterial outcome than the use of single method . Moreover, the combination can give rise to additional property of a system that single method does not possess . In the present work, we aimed to integrate photothermal and NO‐releasing properties into a single nanocomposite to realize: 1 Synergistic photothermal and NO antibacterial effects, 2 controllable NO release by photoconversion effect, and 3 bacterial separation after treatment.…”

Multimodal Magnetic-Plasmonic Nanoparticles for Biomedical Applications

“…However, as demonstrated by Yu et al, an aqueous based thermal decomposition reaction in benzyl alcohol can be carried out through the use of a microwave [44]. The Fe 3 O 4 nanoparticles are synthesised in the presence of PVP; and the resultant nanoparticles are then dispersed in an ethylene glycol solution containing HAuCl 4 and PVP-again, these are placed in the microwave in order to obtain triangular gold nanoparticles studded with Fe 3 O 4 nanoparticles.…”