Reversible Self‐Assembly of Gold Nanoparticles Based on Co‐Functionalization with Zwitterionic and Cationic Binding Motifs**
Open Access
- 12 July 2021
- journal article
- research article
- Published by Wiley in Chemistry – A European Journal
- Vol. 27 (54), 13539-13543
- https://doi.org/10.1002/chem.202102457
Abstract
We report a pH- and temperature-controlled reversible self-assembly of Au-nanoparticles (AuNPs) in water, based on their surface modification with cationic guanidiniocarbonyl pyrrole (GCP) and zwitterionic guanidiniocarbonyl pyrrole carboxylate (GCPZ) binding motifs. When both binding motifs are installed in a carefully balanced ratio, the resulting functionalized AuNPs self-assemble at pH 1, pH 7 and pH 13, whereas they disassemble at pH 3 and pH 11. Further disassembly can be achieved at elevated temperatures at pH 1 and pH 13. Thus, we were able to prepare functionalized nanoparticles that can be assembled/disassembled in seven alternating regimes, simply controlled by pH and temperature.Funding Information
- Deutsche Forschungsgemeinschaft (NI1273/4-1)
- Evonik Industries
This publication has 37 references indexed in Scilit:
- Self-Assembly of Amphiphilic Plasmonic Micelle-Like Nanoparticles in Selective SolventsJournal of the American Chemical Society, 2013
- Protein/Polymer‐Based Dual‐Responsive Gold Nanoparticles with pH‐Dependent Thermal SensitivityAdvanced Functional Materials, 2012
- Compact Zwitterion-Coated Iron Oxide Nanoparticles for Biological ApplicationsNano Letters, 2011
- A systems approach towards the stoichiometry-controlled hetero-assembly of nanoparticlesNature Communications, 2010
- Nanoparticle Oscillations and FrontsAngewandte Chemie, 2010
- Self‐Assembly, Disassembly, and Reassembly of Gold Nanorods Mediated by Bis(terpyridine)–Metal ConnectivityChemistry – A European Journal, 2010
- Precipitation of Oppositely Charged Nanoparticles by Dilution and/or Temperature IncreaseThe Journal of Physical Chemistry B, 2009
- Controlling the Growth of Charged‐Nanoparticle Chains through Interparticle Electrostatic RepulsionAngewandte Chemie, 2008
- Controlling the Growth of Charged‐Nanoparticle Chains through Interparticle Electrostatic RepulsionAngewandte Chemie, 2008
- Light-controlled self-assembly of reversible and irreversible nanoparticle suprastructuresProceedings of the National Academy of Sciences of the United States of America, 2007