No abstract

Mussel‐inspired chemistry, motivated by the adhesive proteins secreted by mussels for attachment to wet surfaces, is an emerging technique for manipulating the surface properties of a variety of materials. Here, a facile mussel‐inspired poly(N‐vinyl pyrrolidone) (PVP) polymer encapsulation with trivial influence on inherent optical properties of perovskite quantum dots (QDs) is demonstrated to efficiently combat the low intrinsic thermal, chemical, and photostability of CsPbBr3 QDs. The suitability of photopolymer‐processed PVP‐CsPbBr3 QDs flexible films as color components in white light–emitting devices is substantiated.

Stable aqueous dispersion of chemically reduced graphene oxide (RGO) was prepared through simple “catechol-induced reduction and functionalization” with a coffee catechol, chlorogenic acid (CA) or real Americano coffee. Prepared CA/RGO or coffee/RGO assembly was optically clear and stable for more than 6 months. This coffee catechol based approach for the formulation of soluble RGO can be easily extended to other “green chemistry” where catechol-rich fruits such as wine or beverages such as berry juice can be used for the formulation of soluble graphene.

Soluble RGO/Plu–S–S assembly with crosslinked Pluronic shell structure was formulated through noncovalent interaction between Plu–SH and RGO plates and simultaneous crosslinking of Plu–SH on RGO plates. While other RGO/aliphatic polymer assemblies show limited solubility only in aqueous media, RGO/Plu–S–S assembly showed enhanced environmental stability and organic solubility with the help of crosslinked shell structure.