scholarly journals Water-stable halide perovskite nanocrystals in biological environment

2021 ◽  
Vol 2015 (1) ◽  
pp. 012150
Author(s):  
Pavel M. Talianov ◽  
Oleksii O. Peltek ◽  
Mikhail A. Masharin ◽  
Soslan Khubezhov ◽  
Mikhail A. Baranov ◽  
...  
Keyword(s):  
Condensation Reaction ◽  
Hydrophobic Properties ◽  
Perovskite Nanocrystals ◽  
Time Points ◽  
Sio2 Shell ◽  
Halide Perovskite ◽  
Biological Environment ◽  
The Stability ◽  
Synthesis Approach

Abstract Tetramethyl orthosilicate and triethoxyphenylsilane, which contains hydrophobic phenyl groups, were used as a silica (SiO2) source in a modified ligand-assisted reprecipitation synthesis approach for the fabrication of water-stable perovskite nanocrystals. Hydrolysis-condensation reaction of tetramethyl orthosilicate and triethoxyphenylsilane results in a formation of 3D siloxane network. Employing triethoxyphenylsilane in the synthesis enhances the hydrophobic properties of the SiO2 shell, which increases the stability of perovskites in aqueous medium. The stability of the CsPbBr3@SiO2 nanocrystals was estimated after 24 h of water exposure by the photoluminescence measurements at different time points. The synthesized CsPbBr3@SiO2 nanocrystals were visualized during in vitro experiments with murine melanoma B16-F10 cells. Hence, the potential of CsPbBr@SiO2 nanocrystals for bioimaging purposes was observed.

scholarly journals Advances in the Stability of Halide Perovskite Nanocrystals

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3733 ◽  
Author(s):  
Maning Liu ◽  
Anastasia Matuhina ◽  
Haichang Zhang ◽  
Paola Vivo
Keyword(s):  
Special Focus ◽  
Next Generation ◽  
Facile Synthesis ◽  
Research Directions ◽  
Rapid Degradation ◽  
Perovskite Nanocrystals ◽  
Final Goal ◽  
Tunable Properties ◽  
Halide Perovskite ◽  
The Stability

Colloidal halide perovskite nanocrystals are promising candidates for next-generation optoelectronics because of their facile synthesis and their outstanding and size-tunable properties. However, these materials suffer from rapid degradation, similarly to their bulk perovskite counterparts. Here, we survey the most recent strategies to boost perovskite nanocrystals stability, with a special focus on the intrinsic chemical- and compositional-factors at synthetic and post-synthetic stage. Finally, we review the most promising approaches to address the environmental extrinsic stability of perovskite nanocrystals (PNCs). Our final goal is to outline the most promising research directions to enhance PNCs’ lifetime, bringing them a step closer to their commercialization.

Formation of highly uniform thinly-wrapped CsPbX3@silicone nanocrystals via self-hydrolysis: suppressed anion exchange and superior stability in polar solvents

2019 ◽  
Vol 7 (32) ◽  
pp. 9813-9819 ◽  
Author(s):  
Haifeng Zhao ◽  
Linfeng Wei ◽  
Peng Zeng ◽  
Mingzhen Liu
Keyword(s):  
Crystal Lattice ◽  
Anion Exchange ◽  
Polar Solvents ◽  
Perovskite Nanocrystals ◽  
Ionic Nature ◽  
Halide Perovskite ◽  
The Stability ◽  
Highly Uniform ◽  
Lead Halide

Cesium lead halide perovskite nanocrystals show promising potential in optical and photonic applications, whereas it is challenging to improve the stability of nanocrystals due to their highly ionic nature and inconsistency in the crystal lattice.

scholarly journals Synthetic factors affecting the stability of methylammonium lead halide perovskite nanocrystals

Nanoscale ◽  
2020 ◽  
Vol 12 (21) ◽  
pp. 11694-11702 ◽  
Author(s):  
Barry McKenna ◽  
Abhinav Shivkumar ◽  
Bethan Charles ◽  
Rachel C. Evans
Keyword(s):  
Optical Properties ◽  
Factors Affecting ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
The Stability ◽  
Lead Halide

The stability and reproducibility of perovskite nanocrystals produced by ligand-assisted reprecipitation (LARP) is investigated. Significant differences in optical properties and morphology are seen depending on specific synthetic factors.

Improving the Stability and Size Tunability of Cesium Lead Halide Perovskite Nanocrystals Using Trioctylphosphine Oxide as the Capping Ligand

Langmuir ◽  
2017 ◽  
Vol 33 (44) ◽  
pp. 12689-12696 ◽  
Author(s):  
Linzhong Wu ◽  
Qixuan Zhong ◽  
Di Yang ◽  
Min Chen ◽  
Huicheng Hu ◽  
...  
Keyword(s):  
Trioctylphosphine Oxide ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
The Stability ◽  
Lead Halide

scholarly journals Unconventional route to dual-shelled organolead halide perovskite nanocrystals with controlled dimensions, surface chemistry, and stabilities

2019 ◽  
Vol 5 (11) ◽  
pp. eaax4424 ◽  
Author(s):  
Yanjie He ◽  
Young Jun Yoon ◽  
Yeu Wei Harn ◽  
Gill V. Biesold-McGee ◽  
Shuang Liang ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Colloidal Stability ◽  
Core Shell ◽  
Core Diameter ◽  
Perovskite Nanocrystals ◽  
The Past ◽  
Halide Perovskite ◽  
Conventional Methods ◽  
The Stability ◽  
Organolead Halide

The past few years have witnessed rapid advances in the synthesis of high-quality perovskite nanocrystals (PNCs). However, despite the impressive developments, the stability of PNCs remains a substantial challenge. The ability to reliably improve stability of PNCs while retaining their individual nanometer size represents a critical step that underpins future advances in optoelectronic applications. Here, we report an unconventional strategy for crafting dual-shelled PNCs (i.e., polymer-ligated perovskite/SiO2 core/shell NCs) with exquisite control over dimensions, surface chemistry, and stabilities. In stark contrast to conventional methods, our strategy relies on capitalizing on judiciously designed star-like copolymers as nanoreactors to render the growth of core/shell NCs with controlled yet tunable perovskite core diameter, SiO2 shell thickness, and surface chemistry. Consequently, the resulting polymer-tethered perovskite/SiO2 core/shell NCs display concurrently a stellar set of substantially improved stabilities (i.e., colloidal stability, chemical composition stability, photostability, water stability), while having appealing solution processability, which are unattainable by conventional methods.

Organometal halide perovskite nanocrystals embedded in silicone resins with bright luminescence and ultrastability

2017 ◽  
Vol 5 (46) ◽  
pp. 12044-12049 ◽  
Author(s):  
Hai Wang ◽  
Hechun Lin ◽  
Xianqing Piao ◽  
Pei Tian ◽  
Minjie Fang ◽  
...  
Keyword(s):  
Uv Exposure ◽  
Silicone Resin ◽  
Resin Composites ◽  
Perovskite Nanocrystals ◽  
Organometal Halide Perovskite ◽  
Halide Perovskite ◽  
The Stability ◽  
Bright Luminescence

The formation of CH3NH3PbBr3 nanocrystals and silicone resin composites greatly improves the stability of CH3NH3PbBr3 nanocrystals against water, heat and UV exposure.

Formation and Structure of Casein Micelles in Lactating Mammary Tissue

1970 ◽  
Vol 28 ◽  
pp. 150-151
Author(s):  
Robert J. Carroll ◽  
Marvin P. Thompson ◽  
Harold M. Farrell
Keyword(s):  
Size Distribution ◽  
G Protein ◽  
Milk Proteins ◽  
Mammary Tissue ◽  
Colloidal System ◽  
Casein Micelles ◽  
The Stability

Milk is an unusually stable colloidal system; the stability of this system is due primarily to the formation of micelles by the major milk proteins, the caseins. Numerous models for the structure of casein micelles have been proposed; these models have been formulated on the basis of in vitro studies. Synthetic casein micelles (i.e., those formed by mixing the purified αsl- and k-caseins with Ca2+ in appropriate ratios) are dissimilar to those from freshly-drawn milks in (i) size distribution, (ii) ratio of Ca/P, and (iii) solvation (g. water/g. protein). Evidently, in vivo organization of the caseins into the micellar form occurs in-a manner which is not identical to the in vitro mode of formation.

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