Tuning the hydrophilicity of gold nanoparticles templated in star block copolymers.
We report on a simple procedure to tune the hydrophilicity of hybrid gold nanoparticles. The nanoparticles have been prepared in the core of a poly(ethylene glycol)-block-poly(epsilon-caprolactone) (PEG-b-PCL) five-arm star block copolymer. A hydrophilic corona was then added to these hybrid gold nanoparticles by direct chemisorption of trithiocarbonate-containing poly(acrylic acid) chains. These polymers were synthesized by RAFT polymerization with a trithiocarbonate as the chain-transfer agent. The efficiency of the grafting was evidenced by TEM, AFM, and DLS and by the successful transfer of these nanoparticles from organic solvent to water.
Fustin
Charles-André
CA
Unité de Chimie des Matériaux Inorganiques et Organiques (CMAT) and Research Center in Micro- and Nano-Materials and Electronic Devices (CeRMiN), Université catholique de Louvain, Place Pasteur 1, 1348 Louvain-la-Neuve, Belgium.
Colard
Catheline
C
Filali
Mariam
M
Guillet
Pierre
P
Duwez
Anne-Sophie
AS
Meier
Michael A R
MA
Schubert
Ulrich S
US
Gohy
Jean-François
JF
D000180:Acrylic Resins / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D007783:Lactones / Q000138:chemical synthesis / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D011092:Polyethylene Glycols / Q000138:chemical synthesis / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry; D017155:Wettability
D000180:Acrylic Resins; D007783:Lactones; C521904:poly(ethylene glycol)-block-poly(epsilon-caprolactone); D014867:Water; D011092:Polyethylene Glycols; C006903:carbopol 940; D006046:Gold