TY  - JOUR
A1  - Tan, Li
A1  - Liu, Bing
A1  - Siemensmeyer, Konrad
A1  - Glebe, Ulrich
A1  - Böker, Alexander
T1  - Synthesis of thermo-responsive nanocomposites of superparamagnetic cobalt nanoparticlesipoly(N-isopropylacrylamide)
JF  - Journal of colloid and interface science
N2  - Novel nanocomposites of superparamagnetic cobalt nanoparticles (Co NPs) and poly(N-isopropylacrylamide) (PNIPAM) were fabricated through surface-initiated atom-transfer radical polymerization (SI-ATRP). We firstly synthesized a functional ATRP initiator, containing an amine (as anchoring group) and a 2-bromopropionate group (SI-ATRP initiator). Oleic acid- and trioctylphosphine oxide-coated Co NPs were then modified with the initiator via ligand exchange. The process is facile and rapid for efficient surface functionalization and afterwards the Co NPs can be dispersed into polar solvent DMF without aggregation. Transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and dynamic light scattering measurements confirmed the success of ligand exchange. The following polymerization of NIPAM was conducted on the surface of Co NPs. Temperature-dependent dynamic light scattering study showed the responsive behavior of PNIPAM-coated Co NPs. The combination of superparamagnetic and thermo-responsive properties in these hybrid nanoparticles is promising for future applications e.g. in biomedicine. (C) 2018 Elsevier Inc. All rights reserved.
KW  - Nanoparticles
KW  - Superparamagnetic
KW  - Surface-initiated atom-transfer radical
KW  - polymerization
KW  - Responsivity
Y1  - 2018
U6  - https://doi.org/10.1016/j.jcis.2018.04.074
SN  - 0021-9797
SN  - 1095-7103
VL  - 526
SP  - 124
EP  - 134
PB  - Elsevier
CY  - San Diego
ER  -