Facile synthesis of nanocrystal encoded fluorescent silica microspheres

Liu, G.; He, Yonghong

doi:10.1016/j.jcis.2012.08.016

Cited by 9 publications

(2 citation statements)

References 29 publications

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“…Initial work on quantum dots inside silica particles showed that basic pH ranges enhance emission. [12] The results presented in Fig. 3(a) corroborate the previous work and show that the emission intensity increases over several months of time.…”

Section: Discussionsupporting

confidence: 88%

“…Previous work to make luminescent silica microspheres has resulted in microparticles with diminished luminescence compared to quantum dots in suspension. [12][13][14] Silica shells from 10-100 nm thick have caused intensity decreases of more than 50%. [15,16] As single silica shells can diminish luminescent emissions, an agglomerated synthesis method was sought for micron-scale diameter particles that are controllable in size and maintain luminescent intensity.…”

Section: Introductionmentioning

confidence: 99%

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Luminescent silica microagglomerates, synthesis, and environmental testing

et al. 2022

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Tracking mass through harsh environments requires surrogate particles that withstand the event and endure until sampling. Silica-covered quantum dots have been shown to withstand a range of environmental pHs from months to years; in this work they are shown to endure in anticipated local environments. Two methods of particle synthesis were employed to produce luminescent silica with particle diameters 0.1–4 μm. These tracer particles scale for mass production, tolerate harsh environments, and endure in debris. They could be deployed in places such as chemical explosions, industrial processes, geologic test beds, oil and gas fields, nuclear reactors, and geothermal plants to track mass under harsh conditions. Graphical abstract

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Luminescent silica microagglomerates, synthesis, and environmental testing

et al. 2022

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Preparation of monodispersed spectrally encoded microspheres with three different types of fluorophores

et al. 2016

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Monodisperse ultra-large-pore silica coated polystyrene core-shell microbeads via layer-by-layer assembly for nano-micro composite

Xie

Liu

et al. 2015

Trans. Tianjin Univ.

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Abstract：Polystyrene(PS)@SiO 2 core-shell microbeads with large pore and large particle size were prepared via layer-by-layer(LBL)assembly technique for potential applications in nano-micro composites. Negative silica nanoparticles synthesized via modified Stöber method and cationic poly(diallyldimethylammonium chloride)were alternately adsorbed on the surface of microbeads. Zeta potential, size, and morphology of the microbeads were monitored during LBL assembly process to ensure the successful deposition of silica nanoparticles. The porous shell was characterized using nitrogen adsorption and desorption analyses, and the surface area, volume and diameter of the pores were derived. It is found that the porous shell thickness and the pore size can be tuned by changing the coating times of silica nanoparticles. Finally, PS@SiO 2 core-shell microbeads with 5,μm PS solid core and 350,nm mesoporous shell(mean BJH pore diameter is ~27,nm)were used to load CdSe/ZnS quantum dots(QDs). The fluorescence microscopic image and the optical amplification of the QDs-embedded microbeads (QDBs)indicate that the as-prepared core-shell microbeads can provide adequate space for QDs and may be useful for further application of nano-micro composites.

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Facile synthesis of nanocrystal encoded fluorescent silica microspheres

Cited by 9 publications

References 29 publications

Luminescent silica microagglomerates, synthesis, and environmental testing

Luminescent silica microagglomerates, synthesis, and environmental testing

Preparation of monodispersed spectrally encoded microspheres with three different types of fluorophores

Monodisperse ultra-large-pore silica coated polystyrene core-shell microbeads via layer-by-layer assembly for nano-micro composite

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