Composite Supraparticles with Tunable Light Emission

Montanarella, Federico; Altantzis, Thomas; Zanaga, Daniele; Rabouw, Freddy T.; Bals, Sara; Baesjou, Patrick J.; Vanmaekelbergh, Daniël; Blaaderen, Alfons van

doi:10.1021/acsnano.7b03975

Cited by 40 publications

(55 citation statements)

References 41 publications

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“…An emission band around 650 nm is observed, originating from the CdSe exciton transition. The spectral positions of absorption and emission bands agree well with the results reported in Dabbousi et al (1997), De Mello Donega (2011) and Montanarella et al (2017).…”

Section: Resultssupporting

confidence: 89%

“…Red emitting CdSe quantum dots (QDs) with a diameter of 3 nm were prepared using a method described by Montanarella et al . (Montanarella et al ., ). First, CdS and ZnS shells were grown around the QDs using a method described by Li et al .…”

Section: Methodsmentioning

confidence: 87%

“…() and Montanarella et al . (). Next, 10 monolayers of CdS were grown, followed by two monolayers CdZnS and two monolayers ZnS.…”

Section: Methodsmentioning

confidence: 97%

“…Red emitting CdSe quantum dots (QDs) with a diameter of 3 nm were prepared using a method described by Montanarella et al (Montanarella et al, 2017). First, CdS and ZnS shells were grown around the QDs using a method described by Li et al (2003) and Montanarella et al (2017). Next, 10 monolayers of CdS were grown, followed by two monolayers CdZnS and two monolayers ZnS.…”

Section: Synthesis Of 15 Nm Cdse/cds/zns Core-shell-shell Quantum Dotsmentioning

confidence: 99%

“…It would be particularly interesting to investigate the quenching behaviour of larger QD based particles. Examples of such particles include QDs with a thicker shell or supra particles of QDs (Montanarella et al, 2017). The luminescence of single supra particles of QDs should be clearly visible.…”

Section: Robustness Lanthanide Doped Npsmentioning

confidence: 99%

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Towards robust and versatile single nanoparticle fiducial markers for correlative light and electron microscopy

Hest

Agronskaia

Fokkema

et al. 2019

Journal of Microscopy

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SummaryFiducial markers are used in correlated light and electron microscopy (CLEM) to enable accurate overlaying of fluorescence and electron microscopy images. Currently used fiducial markers, e.g. dye‐labelled nanoparticles and quantum dots, suffer from irreversible quenching of the luminescence after electron beam exposure. This limits their use in CLEM, since samples have to be studied with light microscopy before the sample can be studied with electron microscopy. Robust fiducial markers, i.e. luminescent labels that can (partially) withstand electron bombardment, are interesting because of the recent development of integrated CLEM microscopes. In addition, nonintegrated CLEM setups may benefit from such fiducial markers. Such markers would allow switching back from EM to LM and are not available yet.Here, we investigate the robustness of various luminescent nanoparticles (NPs) that have good contrast in electron microscopy; 130 nm gold‐core rhodamine B‐labelled silica particles, 15 nm CdSe/CdS/ZnS core–shell–shell quantum dots (QDs) and 230 nm Y2O3:Eu3+ particles. Robustness is studied by measuring the luminescence of (single) NPs after various cycles of electron beam exposure. The gold‐core rhodamine B‐labelled silica NPs and QDs are quenched after a single exposure to 60 ke− nm–2 with an energy of 120 keV, while Y2O3:Eu3+ NPs are robust and still show luminescence after five doses of 60 ke− nm–2. In addition, the luminescence intensity of Y2O3:Eu3+ NPs is investigated as function of electron dose for various electron fluxes. The luminescence intensity initially drops to a constant value well above the single particle detection limit. The intensity loss does not depend on the electron flux, but on the total electron dose. The results indicate that Y2O3:Eu3+ NPs are promising as robust fiducial marker in CLEM.Lay DescriptionLuminescent particles are used as fiducial markers in correlative light and electron microscopy (CLEM) to enable accurate overlaying of fluorescence and electron microscopy images. The currently used fiducial markers, e.g. dyes and quantum dots, loose their luminescence after exposure to the electron beam of the electron microscope. This limits their use in CLEM, since samples have to be studied with light microscopy before the sample can be studied with electron microscopy. Robust fiducial markers, i.e. luminescent labels that can withstand electron exposure, are interesting because of recent developments in integrated CLEM microscopes. Also nonintegrated CLEM setups may benefit from such fiducial markers. Such markers would allow for switching back to fluorescence imaging after the recording of electron microscopy imaging and are not available yet.Here, we investigate the robustness of various luminescent nanoparticles (NPs) that have good contrast in electron microscopy; dye‐labelled silica particles, quantum dots and lanthanide‐doped inorganic particles. Robustness is studied by measuring the luminescence of (single) NPs after various cycles of electron beam exposure. The dye‐labelle...

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Section: Resultssupporting

confidence: 89%

Section: Methodsmentioning

confidence: 87%

“…() and Montanarella et al . (). Next, 10 monolayers of CdS were grown, followed by two monolayers CdZnS and two monolayers ZnS.…”

Section: Methodsmentioning

confidence: 97%

Section: Synthesis Of 15 Nm Cdse/cds/zns Core-shell-shell Quantum Dotsmentioning

confidence: 99%

Section: Robustness Lanthanide Doped Npsmentioning

confidence: 99%

See 3 more Smart Citations

Towards robust and versatile single nanoparticle fiducial markers for correlative light and electron microscopy

Hest

Agronskaia

Fokkema

et al. 2019

Journal of Microscopy

View full text Add to dashboard Cite

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Design Principles and Material Engineering of ZnS for Optoelectronic Devices and Catalysis

Liu

Chen

et al. 2018

Adv Funct Materials

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ZnS, as one of the first semiconductors discovered and a rising material star, has embraced exciting breakthroughs in the past few years. To shed light on the design principles and engineering techniques of ZnS for improved/novel optoelectronic properties, the fundamental mechanisms and commonly employed strategies are proposed in this review. Recent progress on modifications of ZnS allows it to be extensively and effectively used in versatile applications, including transparent conductors, UV photodetectors, luminescent devices, and catalysis, which are clearly and comprehensively summarized in this work. Novel functional devices springing up from the newly developed ZnS-based materials are highlighted as well. This review not only provides a scientific insight into the advances of ZnS-based materials, but also touches on the future opportunities in this inspiring field.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201802029. relatively high charge recombination rate and low charge transport process inhibit the optoelectronic properties of ZnS as a high-performance photodetector. As a window layer of optoelectronic devices, a lack of high electrical conductivity typically hinders the practical use of ZnS in solar cells, photodiodes, light-emitting devices, etc. As a photocatalyst, the transparency of ZnS becomes a drawback as it suffers from a poor utilization of sunlight.There is not a perfect material, but the potential of developing a material is beyond limitation. The past few years have witnessed extensive designing and engineering of ZnS to explore its potentials in specific applications. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] This review summarizes the recent breakthroughs on ZnS-based materials as excellent candidates in optoelectronic devices, photocatalysis, and other novel functional devices. More importantly, it sheds light on the design principles and fundamental mechanisms of the improved performance of ZnS through strategies such as developing novel nanostructures, bandgap engineering, alloying with other materials, etc. To the best of our knowledge, it is the first comprehensive review on the design principles and material engineering of ZnS for novel/improved properties and intended applications. Briefly, current literature on a variety of ZnS-based structures was first summarized, ranging from 0D to 2D nanostructures. Then, the representative applications of ZnS-based materials are described, which are mainly consisted of four parts, as shown in Figure 1: transparent conductors, UV photodetectors, luminescent devices, and catalysis. Each part contains the latest design strategies of ZnS for the intended applications, fabrication techniques, representative examples, and the state-of-the-art devices. Finally, it outlines the challenges and opportunities in each field. In particular, we provide our perspectives on the future research directions of ZnS in energy and environment.

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Self‐Assembled Ag‐MXA Superclusters with Structure‐Dependent Mechanical Properties

et al. 2018

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The low elastic modulus and time-consuming formation process represent the major challenges that impede the penetration of nanoparticle superstructures into daily life applications. As observed in the molecular or atomic crystals, more effective interactions between adjacent nanoparticles would introduce beneficial features to assemblies enabling optimized mechanical properties. Here, a straightforward synthetic strategy is showed that allows fast and scalable fabrication of 2D Ag-mercaptoalkyl acid superclusters of either hexagonal or lamellar topology. Remarkably, these ordered superstructures exhibit a structure-dependent elastic modulus which is subject to the tether length of straight-chain mercaptoalkyl acids or the ratio between silver and tether molecules. These superclusters are plastic and moldable against arbitrarily shaped masters of macroscopic dimensions, thereby opening a wealth of possibilities to develop more nanocrystals with practically useful nanoscopic properties.

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Composite Supraparticles with Tunable Light Emission

Cited by 40 publications

References 41 publications

Towards robust and versatile single nanoparticle fiducial markers for correlative light and electron microscopy

Towards robust and versatile single nanoparticle fiducial markers for correlative light and electron microscopy

Design Principles and Material Engineering of ZnS for Optoelectronic Devices and Catalysis

Self‐Assembled Ag‐MXA Superclusters with Structure‐Dependent Mechanical Properties

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