Synthesis of Prussian Blue Nanoparticles with a Hollow Interior by Controlled Chemical Etching

Hu, Ming; Furukawa, Shuhei; Ohtani, Ryo; Sukegawa, Hiroaki; Nemoto, Y.; Reboul, Julien; Kitagawa, Susumu; Yamauchi, Yusuke

doi:10.1002/anie.201105190

Cited by 463 publications

(294 citation statements)

References 86 publications

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“…In the absence of PVP, there is significant disruption to the ZIF-8 shells leading to break up of the microspheres and large numbers of free ZIF-8 crystals. ( Figure S39) This is analogous to the acid-induced etching of Prussian Blue mesocrystals, where adsorbed layers of PVP significantly reduce the rate of etching on the outer surface leading to the controlled formation of hollow particles 29 , and the PVPstabilised template-free formation of MOF-5 derived hollow nanocages. 30 Further, the surface-functionalisation assisted etching of ZIF-8 using phenolic acids has recently been demonstrated 31 .…”

Section: Resultsmentioning

confidence: 85%

Surfactant-assisted ZnO processing as a versatile route to ZIF composites and hollow architectures with enhanced dye adsorption

2016

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a Metal oxides can be used as hard sacrificial templates for the preparation of multifunctional core-shell MOF-based composites following reaction with the organic linker. This is a facile method, but often structures of well-defined shape are only obtained under narrow ranges of conditions, the shape can be lost completely and low levels of MOF conversion observed. Using the prototypical framework ZIF-8 we present an alternative surfactant-assisted surface passivation strategy where the ZnO precursor particles are first coated with a guanidinium-based amphiphile. The surfactant interacts strongly with the oxide surface and allows fine-tuning of the release of Zn(II) and ZIF-8 nucleation by the level of surface coverage permitting a range of well-defined ZnO@ZIF-8 core-shell architectures to be prepared including in water. Further, selective base-etching of the oxide core provides facile access to hollow ZIF-8 and yolk-shell structures. We also demonstrate enhanced dye adsorption and recovery from aqueous mixtures using ZnO@ZIF-8 composite microspheres..

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Section: Resultsmentioning

confidence: 85%

Surfactant-assisted ZnO processing as a versatile route to ZIF composites and hollow architectures with enhanced dye adsorption

2016

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“…The cubic morphology of the nanoparticles was in good agreement with the well-known cubic morphology of PB NPs. 19, 27, 28 Spherical iron oxide NPs captured in the sandwich-type immunoassay system were first dissolved in acidic conditions under ultrasonication to release ferric ions (Fe 3+ ), followed by the reaction between ferric ions and the added ferrocyanide ions to produce PB NPs that had a typical cubic morphology. The wide size distribution of PB NPs in the immunosensing solution might be due to the absence of surface capping agents during the nucleation between ferric ions and potassium ferrocyanide.…”

Section: Resultsmentioning

confidence: 99%

Cost-effective and sensitive colorimetric immunosensing using an iron oxide-to-Prussian blue nanoparticle conversion strategy

Sanjay

2016

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The development of new sensitive, cost-effective and user-friendly colorimetric bioassays is in increasing demand to meet the requirement of modern clinical diagnostics and field detection. Herein, a novel iron oxide-to-Prussian blue (PB) nanoparticles (NPs) conversion strategy was developed and applied to sensitive colorimetric immunosensing of cancer biomarkers. In a typical sandwich-type immunosensing system, the captured spherical antibody-conjugated iron oxide NPs were transformed into cubic PB NPs, which exhibited highly visible blue color with high molar extinction coefficients. Hence, a new colorimetric immunosensing strategy was developed as a result of this low cost and simple transformation process. Without the aid of any complex nanoparticle stabilizing ligands and signal amplification process, prostate-specific antigen as a model analyte can be detected at a concentration as low as 1.0 ng·mL−1 by the naked eye with good reliability for detection of real human serum samples. This is the first attempt to develop and apply the iron oxide-to-PB NPs colorimetric conversion strategy for immunosensing, and shows great promise for the development of new sensitive, cost-effective and user-friendly colorimetric bioassays in various bioanalytical applications, especially in low-resource settings.

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“…The authors claim that CTAB selectively adsorbs on the crystal surface, protecting the faces of the pristine cubes against HCl, thus leading to a selective etching of the crystal edges (see Figure 29 a). This approach was further exploited by Yamauchi et al [253] in order to obtain hollow particles of Prussian blue and Prussian blue analogues. In this case, the PVP polymer protected uniformly the crystal surface in such a way that the interior was selectively etched by HCl (see Figure 29 b).…”

Section: Surfactants As Capping Agentsmentioning

confidence: 99%

“…The crystal shape and size of a given metal-organic framework have been reported to have an impact on the its adsorption behaviour, not only in terms of capacity [246,250,253,276] but specially in terms of adsorption kinetics [240,253]. This observed behaviour can be related with the shorter diffusion lengths and higher surface energies obtained for smaller particles together with the different exposed lattice planes, which can possess different energies or a better accessibility to the porosity of the framework, depending on the crystal morphology.…”

Section: Applicationsmentioning

confidence: 99%

Multi-scale crystal engineering of metal organic frameworks

Seoane

Castellanos

Dikhtiarenko

et al. 2016

Coordination Chemistry Reviews

265

163

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Synthesis of Prussian Blue Nanoparticles with a Hollow Interior by Controlled Chemical Etching

Cited by 463 publications

References 86 publications

Surfactant-assisted ZnO processing as a versatile route to ZIF composites and hollow architectures with enhanced dye adsorption

Surfactant-assisted ZnO processing as a versatile route to ZIF composites and hollow architectures with enhanced dye adsorption

Cost-effective and sensitive colorimetric immunosensing using an iron oxide-to-Prussian blue nanoparticle conversion strategy

Multi-scale crystal engineering of metal organic frameworks

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