A Versatile Strategy for Quantum Dot Ligand Exchange

Dubois, Fabien; Mahler, Benoît; Dubertret, Benoît; Doris, Eric; Mioskowski, Charles

doi:10.1021/ja067742y

Cited by 314 publications

(290 citation statements)

References 15 publications

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“…Besides TOP and/or TOPO, hexadecylamine or other amines are also commonly used ligands for CdSe quantum dots (Ji et al 2008), which can also be replaced by stronger binding molecules, e.g. with one or more thiol groups (Döllefeld et al 2002;Dubois et al 2007). In the case of quantum dots, the ligand shell may influence the fluorescence properties of the particles (Wuister et al 2004;Kalyuzhny & Murray 2005;Bullen & Mulvaney 2006;Smith et al 2006;Ji et al 2008), in particular the quantum yield, especially in the aqueous phase, as discussed in the following section.…”

Section: (C) Ligand Exchangementioning

confidence: 99%

Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles

Sperling

Parak

2010

Phil. Trans. R. Soc. A.

1,409

1,092

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Inorganic colloidal nanoparticles are very small, nanoscale objects with inorganic cores that are dispersed in a solvent. Depending on the material they consist of, nanoparticles can possess a number of different properties such as high electron density and strong optical absorption (e.g. metal particles, in particular Au), photoluminescence in the form of fluorescence (semiconductor quantum dots, e.g. CdSe or CdTe) or phosphorescence (doped oxide materials, e.g. Y 2 O 3 ), or magnetic moment (e.g. iron oxide or cobalt nanoparticles). Prerequisite for every possible application is the proper surface functionalization of such nanoparticles, which determines their interaction with the environment. These interactions ultimately affect the colloidal stability of the particles, and may yield to a controlled assembly or to the delivery of nanoparticles to a target, e.g. by appropriate functional molecules on the particle surface. This work aims to review different strategies of surface modification and functionalization of inorganic colloidal nanoparticles with a special focus on the material systems gold and semiconductor nanoparticles, such as CdSe/ZnS. However, the discussed strategies are often of general nature and apply in the same way to nanoparticles of other materials.

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Section: (C) Ligand Exchangementioning

confidence: 99%

Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles

Sperling

Parak

2010

Phil. Trans. R. Soc. A.

1,409

1,092

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“…The capping of CdS and CdSe QDs consisting of semiconductor cores surrounded by organic ligands has attracted considerable interest for applications in materials science and nanotechnology [46][47][48]. Although these studies enabled syntheses of stable capping semiconductor QDs with various sizes, shapes, and compositions, few studies have been conducted on the surface structures and properties of capping ligands.…”

Section: The Surface Modification Of Cds and Cdse Qds Via Organic Ligmentioning

confidence: 99%

Surface Modification of CdSe and CdS Quantum Dots-Experimental and Density Function Theory Investigation

Chena¹,

Chou²,

Chenc³

et al. 2012

Nanocrystals - Synthesis, Characterization and Applications

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“…For example, the commonly used exchange protocol for pyridine surface replacement 25 involves hours of heating at elevated temperatures in neat pyridine, 6 while amines or thiols are typically exchanged in concentrated solution at room temperature. 7 Still other protocols involve phase transfer over hours or days. 8 We hypothesized that broad applicability and greater efficiency might be achievable using a chemically-driven approach in which chemoselective reactions at the head groups of native ligands could render these ligands non-coordinating.…”

Section: Synthesized Tms Mixed Chalcogenides Leverage Preferential Rementioning

confidence: 99%

Driving oxygen coordinated ligand exchange at nanocrystal surfaces using trialkylsilylated chalcogenides

et al. 2011

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A general, efficient method is demonstrated for exchanging native oxyanionic ligands on inorganic nanocrystals with functional trimethylsilylated (TMS) chalcogenido ligands. In addition, newly synthesized TMS mixed chalcogenides leverage preferential reactivity of TMS-S bonds over TMS-O bonds, enabling efficient transfer of luminescent nanocrystals into aqueous media with retention of their optical properties.

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A Versatile Strategy for Quantum Dot Ligand Exchange

Cited by 314 publications

References 15 publications

Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles

Surface modification, functionalization and bioconjugation of colloidal inorganic nanoparticles

Surface Modification of CdSe and CdS Quantum Dots-Experimental and Density Function Theory Investigation

Driving oxygen coordinated ligand exchange at nanocrystal surfaces using trialkylsilylated chalcogenides

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