A Modular System for the Design of Stimuli‐Responsive Multifunctional Nanoparticle Aggregates by Use of Host–Guest Chemistry. Issue 16 (24th March 2018)

• Record Type: Journal Article
• Authors: Engel, Sabrina; Möller, Nadja; Stricker, Lucas; Peterlechner, Martin; Ravoo, Bart Jan
• Is Part Of: Small. Volume 14:Issue 16(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-03-24
• Subjects: host–guest chemistry -- multifunctional nanomaterials -- nanoparticles -- self‐assembly -- stimuli‐responsive materials; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201704287
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: A self‐assembly approach for the design of multifunctional nanomaterials consisting of different nanoparticles (gold, iron oxide, and lanthanide‐doped LiYF4 ) is developed. This modular system takes advantage of the light‐responsive supramolecular host–guest chemistry of β‐cyclodextrin and arylazopyrazole, which enables the dynamic and reversible self‐assembly of particles to spherical nanoparticle aggregates in aqueous solution. Due to the magnetic iron oxide nanoparticles, the aggregates can be manipulated by an external magnetic field leading to the formation of linear structures. As a result of the integration of upconversion nanoparticles, the aggregates are additionally responsive to near‐infrared light and can be redispersed by use of the upconversion effect. By varying the nanoparticle and linker concentrations the composition, size, shape, and properties of the multifunctional nanoparticle aggregates can be fine‐tuned. Abstract : Multifunctional aggregates consisting of iron oxide, gold, and lanthanide‐doped nanoparticles are assembled by use of the supramolecular host–guest chemistry between cyclodextrin and arylazopyrazole leading to defined nanoparticle clusters that respond to external stimuli such as light and magnetic field.