Thermally stable and hydrophilic CsPbBr<sub>3</sub>/mPEG-NH<sub>2</sub> nanocrystals with enhanced aqueous fluorescence for cell imaging

Yan, Qi-Bao; Bao, Ning; Ding, Shou-Nian

doi:10.1039/c9tb00568d

Cited by 34 publications

(42 citation statements)

References 57 publications

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“…Also, polymers can modify the surface functionalities of the perovskite NCs, making them suitable for specific applications such as biomedical applications. [ 11,42,43 ] Hu et al. [ 38 ] prepared CsPbBr 3 /SiO 2 NCs through a waterless in situ growth method, in which multiple perovskite NCs were embedded into a silica sphere.…”

Section: Band Structures and Configurations Of Core/shell Perovskite Ncsmentioning

confidence: 99%

“…[ 42 ] Yan et al. [ 43 ] prepared CsPbBr 3 /mPEG‐NH 2 NCs and reported an unexpected increase of the relative PL intensity from 100 to 130% after one week of storage in water. The enhanced PL intensity was ascribed to the crosslinking of mPEG‐NH 2 on the NC surface, which leads to passivation of the surface non‐radiative recombination centers.…”

Section: Enhanced Properties Of Core/shell Perovskitesmentioning

confidence: 99%

“…[ 162 ] Moreover, the PL intensity of CsPbBr 3 /mPEG‐NH 2 NCs retained ≈80% of the initial PL intensity at temperatures up to 100 °C. [ 43 ]…”

Section: Enhanced Properties Of Core/shell Perovskitesmentioning

confidence: 99%

“…Perovskite NCs, capped with water‐soluble and non‐toxic shell, also have other potential applications, such as in biomedical imaging. [ 42,43,71,113 ] Wang et al. [ 42 ] produced CsPbBr 3 /PMMA nanospheres with a high PLQY and good water resistance by a spray‐assisted coil‐globule transition method and used these core/shell NCs for live imaging of HeLa cells.…”

Section: Optoelectronic Applicationsmentioning

confidence: 99%

“…Besides, the biocompatibility of CsPbBr 3 /PMMA nanospheres was confirmed in vitro, with 92–99% cell survival rates of HeLa cells following exposure to the NCs at concentrations of up to 60 µg mL −1 (Figure 15d, right). [ 42 ] Other biocompatible core/shell perovskite NCs with good thermal and water solubility, such as CsPbBr 3 /SiO 2 [ 113 ] and CsPbBr 3 /mPEG‐NH 2 , [ 43 ] were also successfully used for imaging of tumor cells and HepG2 cells. These results suggest realistic prospects for core/shell perovskite NCs, as a new generation of fluorescent probes for biomedical applications.…”

Section: Optoelectronic Applicationsmentioning

confidence: 99%

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Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

Zhang

Chen

Kong

et al. 2021

Adv Funct Materials

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Core/shell structured metal halide perovskite nanocrystals (NCs) are emerging as a type of material with remarkable optical and electronic properties. Research into this field has been developing and expanding rapidly in recent years, with significant advances in the studies of the shell growth mechanism and in understanding of properties of these materials. Significant enhancement of both the stability and the optical performance of core/shell perovskite NCs are of particular importance for their applications in optoelectronic technologies. In this review, the recent advances in core/shell structured perovskite NCs are summarized. The band structures and configurations of core/shell perovskite NCs are elaborated, the shell classification and shell engineering approaches, such as perovskites and their derivative shells, semiconductor shell, oxide shell, polymer shell, etc. are reviewed, and the shell growth mechanisms are discussed. The prospective of these NCs in lighting and displays, solar cells, photodetectors, and other devices is discussed in the light of current knowledge, remaining challenges, and future opportunities.

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Section: Band Structures and Configurations Of Core/shell Perovskite Ncsmentioning

confidence: 99%

Section: Enhanced Properties Of Core/shell Perovskitesmentioning

confidence: 99%

“…[ 162 ] Moreover, the PL intensity of CsPbBr 3 /mPEG‐NH 2 NCs retained ≈80% of the initial PL intensity at temperatures up to 100 °C. [ 43 ]…”

Section: Enhanced Properties Of Core/shell Perovskitesmentioning

confidence: 99%

Section: Optoelectronic Applicationsmentioning

confidence: 99%

Section: Optoelectronic Applicationsmentioning

confidence: 99%

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Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

Zhang

Chen

Kong

et al. 2021

Adv Funct Materials

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Recent Advances in Synthesis, Properties, and Applications of Metal Halide Perovskite Nanocrystals/Polymer Nanocomposites

et al. 2021

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a 3D framework. The A-site cations occupy the cavity within the framework. Metal halide perovskites have a relatively soft lattice and a dynamically disordered crystal structure which results in tunable charge-carrier recombination rates and other nonclassical semiconductor characteristics. [1] Metal halide perovskites have been extensively studied for solar energy conversion over the past decade due to their intriguing optoelectronic properties, including near-perfect crystalline structures, [2] tunable direct bandgaps, [3] large absorption coefficient (1.5 × 10 4 cm −1 at 550 nm), [4] high ambipolar mobility (≈20 cm 2 V −1 s −1 ), [5] long carrier diffusion lengths (100-1000 nm; ≈175 µm in MAPbI 3 single crystals) (L eff,e /L eff,h < 1), [6] small exciton binding energy (≈30 meV), [7] high defect tolerance, [8] solution processability, and low processing cost. [9] Notably, the certified power conversion efficiency (PCE) of single-junction perovskite solar cells has rapidly increased from 3.8% in 2009 to 25.2% in 2019. [10] It is also notable that charge carriers within metal halide perovskites can undergo radiative recombination to emit light, making them promising candidates as next-generation light sources for light-emitting diodes (LEDs) [11] and lasers. [12] Bulk perovskite, however, exhibits limited photoluminescence quantum yield (PLQY) due to the presence of mobile ionic defects and small exciton binding energy. [13] In contrast, perovskite nanocrystals (PNCs) possess strong quantum confinement and display improved optoelectronic properties from their bulk counterparts. [14] Notably, metal halide PNCs possess high luminescence, narrow full width at half maximum, and a composition-and size-dependent bandgap. [15] The photoluminescence (PL) of metal halide PNCs can be readily tuned from ultraviolet (UV) to near-infrared wavelengths by simply tailoring their composition or altering their size relative to their Bohr diameters.Hot-injection and ligand-assisted reprecipitation methods represent the two most-developed colloidal synthesis approaches of metal halide PNCs. [13,16] The use of organic capping ligands in synthesis enables nanoscale growth of metal halide perovskite crystals and actively passivates their surface defects, in a manner similar to that of conventional NC Metal halide perovskite nanocrystals (PNCs) have recently garnered tremendous research interest due to their unique optoelectronic properties and promising applications in photovoltaics and optoelectronics. Metal halide PNCs can be combined with polymers to create nanocomposites that carry an array of advantageous characteristics. The polymer matrix can bestow stability, stretchability, and solution-processability while the PNCs maintain their size-, shape-and composition-dependent optoelectronic properties. As such, these nanocomposites possess great promise for next-generation displays, lighting, sensing, biomedical technologies, and energy conversion. The recent advances in metal halide PNC/polymer nanocomposites are summarized here. F...

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Water‐Dispersing Perovskite Probes for the Rapid Imaging of Glioma Cells

Chi

Zhang

et al. 2021

Advanced Optical Materials

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Real‐time in vitro detection of glioma cells facilitates precise tumor removal. However, the fluorescent labeling of tumor cells in clinical practice is limited by many factors, including the time consumed, low recognition efficiency, and fluorescence quenching. Here, a general strategy for building perovskite quantum dot (PQD)‐based biological probes utilizing the attraction between positive and negative electric charges is reported. Poly (lactic‐co‐glycolic acid) (PLGA) is chosen for encapsulating PQDs to completely prevent their aggregation, decomposition, or release in water or oxygen. The carboxyl group of PLGA has anchoring coordination with the PQDs, which reduces the surface defects. Moreover, it causes PQD‐based nanocrystals (P‐PNCs) to be surrounded by a positively charged layer in water. Given the specific recognition of chlorotoxin for the channels, rapid imaging of glioma cells is successfully performed in 15 min using P‐PNCs modified with chlorotoxin via charge attraction. The photoluminescence quantum yield of P‐PNC probes reached 87% and remained at 93% after 30 days of dispersion in water, while maintaining a much longer fluorescence lifetime of 15 µs. Therefore, this promising biological probe will be a general nanoplatform for identifying distinct cellular compartments using different biomarker imaging methods.

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Thermally stable and hydrophilic CsPbBr₃/mPEG-NH₂ nanocrystals with enhanced aqueous fluorescence for cell imaging

Abstract: Hydrophilic CsPbBr3/mPEG-NH2 nanocrystals with enhanced fluorescence for cell imaging.

Cited by 34 publications

References 57 publications

Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

Recent Advances in Synthesis, Properties, and Applications of Metal Halide Perovskite Nanocrystals/Polymer Nanocomposites

Water‐Dispersing Perovskite Probes for the Rapid Imaging of Glioma Cells

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Thermally stable and hydrophilic CsPbBr3/mPEG-NH2 nanocrystals with enhanced aqueous fluorescence for cell imaging

Abstract: Hydrophilic CsPbBr3/mPEG-NH2 nanocrystals with enhanced fluorescence for cell imaging.

Cited by 34 publications

References 57 publications

Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

Recent Advances in Synthesis, Properties, and Applications of Metal Halide Perovskite Nanocrystals/Polymer Nanocomposites

Water‐Dispersing Perovskite Probes for the Rapid Imaging of Glioma Cells

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Thermally stable and hydrophilic CsPbBr₃/mPEG-NH₂ nanocrystals with enhanced aqueous fluorescence for cell imaging