Show simple item record

Files in this item


Item metadata

dc.contributor.authorEdwards, William
dc.contributor.authorMarro, Nicolas
dc.contributor.authorTurner, Grace
dc.contributor.authorKay, Euan R.
dc.identifier.citationEdwards , W , Marro , N , Turner , G & Kay , E R 2018 , ' Continuum tuning of nanoparticle interfacial properties by dynamic covalent exchange ' , Chemical Science , vol. 9 , no. 1 , pp. 125-133 .
dc.identifier.otherORCID: /0000-0001-8177-6393/work/56862260
dc.descriptionThis work was supported by the EPSRC (EP/K016342/1 and EP/M506631/1), the Leverhulme Trust (RPG-2015-042) and the University of St Andrews. E.R.K. thanks the Royal Society of Edinburgh and Scottish Government for a Personal Research Fellowship.en
dc.description.abstractSurface chemical composition is fundamental to determining properties on the nanoscale, making precise control over surface chemistry critical to being able to optimise nanomaterials for virtually any application. Surface-engineering independent of the preparation of the underlying nanomaterial is particularly attractive for efficient, divergent synthetic strategies, and for the potential to create reactive, responsive and smart nanodevices. For monolayer-stabilised nanoparticles, established methods include ligand exchange to replace the ligand shell in its entirety, encapsulation with amphiphilic (macro)molecules, noncovalent interactions with surface-bound biomolecules, or a relatively limited number of covalent bond forming reactions. Yet, each of these approaches has considerable drawbacks. Here we show that dynamic covalent exchange at the periphery of the nanoparticle-stabilizing monolayer allows surface-bound ligand molecular structure to be substantially modified in mild and reversible processes that are independent of the nanoparticle–molecule interface. Simple stoichiometric variation allows the extent of exchange to be controlled, generating a range of kinetically stable mixed-monolayer compositions across an otherwise identical, self-consistent series of nanoparticles. This approach can be used to modulate nanoparticle properties that are defined by the monolayer composition. We demonstrate switching of nanoparticle solvent compatibility between widely differing solvents – spanning hexane to water – and the ability to tune solubility across the entire continuum between these extremes, all from a single nanoparticle starting point. We also demonstrate that fine control over mixed-monolayer composition influences the assembly of discrete, colloidally stable nanoparticle clusters. By carefully assessing monolayer composition in each state, using both in situ and ex situ methods, we are able to correlate the molecular-level details of the nanoparticle-bound monolayer with system-level properties and behaviour. These empirically determined relationships contribute fundamental insights on nanoscale structure–function relationships, which are currently beyond the capabilities of ab initio prediction.
dc.relation.ispartofChemical Scienceen
dc.subjectQD Chemistryen
dc.titleContinuum tuning of nanoparticle interfacial properties by dynamic covalent exchangeen
dc.typeJournal articleen
dc.contributor.sponsorThe Leverhulme Trusten
dc.contributor.sponsorThe Royal Society of Edinburghen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.contributor.institutionUniversity of St Andrews. EaSTCHEMen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record