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Thermoresponsive Gold Nanoparticles with Positive UCST-Type Thermoresponsivity

Title data

Liu, Fangyao ; Agarwal, Seema:
Thermoresponsive Gold Nanoparticles with Positive UCST-Type Thermoresponsivity.
In: Macromolecular Chemistry and Physics. Vol. 216 (February 2015) Issue 4 . - pp. 460-465.
ISSN 1521-3935
DOI: https://doi.org/10.1002/macp.201400497

Official URL: Volltext

Abstract in another language

Trithiocarbonate end-functionalized poly(N-acryloylglycinamide) (PNAGA), synthesized via reversible addition–fragmentation transfer (RAFT) polymerization of different molecular weights, is grafted onto gold nanoparticles (AuNPs) by ligand exchange in phosphate-buffered saline. The PNAGA-grafted AuNPs display upper critical solution temperature (UCST)-type transitions: stable colloidal distribution and aggregation above and below the cloud points, respectively. Cloud points of PNAGA are not affected by the grafting procedure, and PNAGA@AuNPs show similar cloud points as that of the trithiocarbonate end-functionalized free-PNAGAs used for grafting. The UCST-type phase transition is reversible for many cycles. The reversible control of the phase transition is proved by turbidity measurements and UV–vis spectroscopy, as well as by transmission electron microscopy (TEM).

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: gold nanoparticles, ligand exchange, reversible addition–fragmentation transfer polymerization, upper critical solution temperature
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 01 Apr 2015 11:51
Last Modified: 01 Apr 2015 11:51
URI: https://eref.uni-bayreuth.de/id/eprint/9580