A facile and green mechanosynthesis strategy free of solvent and high reaction temperature was developed to fabricate highly emissive cesium lead halide perovskite (CsPbX) quantum dots (QDs). Their composition can be adjusted conveniently simply through mechanically milling/grinding stoichiometric combinations of raw reagents, thereby introducing a broad luminescence tunability of the product with adjustable wavelength, line width, and photoluminescence quantum yield. Desired CsPbX QDs "library" can thus be readily constructed in a way like assembling Lego building blocks. Hence, the method offered new avenues in the preparation of multicomponent cocrystals, adding one appealing apparatus to the tool box of perovskite-type QDs synthesis. Intriguingly, photoinduced dynamic study revealed the hole-transfer process of the as-prepared QDs toward electron donors, indicative of their potential in charge-transfer-based applications such as light-harvesting devices and photocatalysis.
Acid intercalation-exfoliated 2D Bi shows strong nonlinear NIR responses associated with multi-timescale carrier dynamics and is used for mode-locking lasers.
An effective solution to scalable exfoliation of large lateral sized antimonene nanosheets is developed. Flexible photodetectors based on hybrid structure of surface modified few layer antimonene exhibited excellent performance.
Hybrid
cellulose/N,N′-methylene
bisacrylamide/graphene oxide (GO) aerogels with high flexibility and
underwater oleophobicity were fabricated via the NaOH/urea solvent
system. The as-prepared aerogels demonstrated low density, high porosity,
and good flexibility. Underwater oleophobicity is attributed to the
abundant hydrophilic groups in the aerogel skeleton, rough surface,
and homogeneous distribution of GO. The samples were shaped into the
membrane and filtered for oil/water separation by gravity. The separation
efficiency over membrane-shaped CG1 was 99.8% with a permeate
flux of 22,900 L/(m2·h). Moreover, excellent reusability
and durability were observed under long-term tests and corrosive conditions.
Black phosphorus (BP) has attracted great attentions in the last few years, but their applications in optoelectronics have been strongly hindered by the poor environmental stability, especially under light irradiation. Herein, the fabrication of surface passivated few‐layer BP assisted by polymer ionic liquids (PILs) is reported. The PIL‐modified 2D BP exhibits excellent stability under ambient conditions, with negligible deterioration in 100 d. Furthermore, the PILs attached on the BP surface provide reliable and flexible electrical contact between the few‐layer BP and other device components. As a proof of concept, PIL‐modified BP nanosheets are successfully applied in flexible photodetectors, which show high flexibility, good detectivity with no obvious performance deterioration in 120 h. This work demonstrates that the PIL modification can endow BP nanosheets with excellent environmental stability and good conductivity, so that may significantly expand the applications of BP in flexible optoelectronics.
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