Black phosphorus quantum dots (BPQDs) have been prepared by a high turbulent shear rate generated from a household kitchen blender. A layer-by-layer disintegration mechanism of bulk BP crystals is suggested. As-synthesized BPQDs have shown excellent humidity sensing and photothermal converting properties. Importantly, this work not only explores potential applications for the BPQDs but also provides a successful paradigm for preparing the QDs of other layered materials.
The growing demands for optical anti-counterfeiting
technology
require the development of new environmentally friendly materials
with single component, multimodal fluorescence and high stability.
Herein, the Bi/Sb codoped Cs2Ag0.1Na0.9InCl6 lead-free double perovskite material is reported
as an efficient multimodal luminescence material with excitation-wavelength-dependent
emission. When excited by 360 nm UV light, dual-emission is observed
at 455 and 560 nm, which comes from the 3P1–1S0 transition of Sb3+ ions and self-trapped
excitons (STEs), respectively. Under the 320 nm UV lamp, the microcrystals
show only a blue emission centered at 455 nm. Therefore, the Bi/Sb
codoped Cs2Ag0.1Na0.9InCl6 double perovskite emits blue and yellow lights under the 320 and
360 nm UV lamp, respectively. Moreover, the obtained double perovskite
shows a high PLQY up to 41% and excellent stability against both air
and high temperature, which make it a promising anti-counterfeiting
material.
Lead halide perovskite nanocrystals (NCs) are promising
optical
materials in many fields. However, their poor moisture stability,
significant toxicity, and difficulty to be further functionalized
greatly hinder their applications in bioimaging. Here, a universal
strategy is demonstrated by simply encapsulating CsPbX3 (X = Cl, Br, I) NCs into phospholipids to achieve CsPbX3–phospholipid micelles (CsPbX3@phospholipid) as
probes for multiplex encoding cellular imaging or tumor-targeted imaging.
The layer of phospholipids endows CsPbX3 NCs with superior
water-resistant characteristics, the ability to be further biofunctionalized,
and greatly improved biocompatibility. The CsPbX3@phospholipid
micelles exhibited strong luminescence with narrow fwhm in water for
more than four months. Specifically, even after being modified with
folic acid, the bright fluorescence of the micelles was well retained,
which were employed for the targeting of Hela cells. Finally, the
greatly reduced toxicity of the CsPbX3@phospholipid micelles
was verified using HeLa cells and zebrafish as in vitro and in vivo
models, respectively.
A new and efficient defect post-healing method for carbon-based mesoscopic perovskite solar cells was developed via hydrophobic ligand (TOPO) coordination.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.