Cu-based halide perovskite derivatives (PDs) have emerged in recent years due to their low toxicity, high stability, and earth-abundant source. In particular, due to the special photophysical properties, such as broadband visible photoluminescence (PL), large Stokes shift, and high luminous efficiency, Cs−Cu−I PDs have attracted more attention in white light and short-wavelength light-emitting device applications. Here, Cs−Cu− I nanoscale-thick films with a mixed phase of CsCu 2 I 3 and Cs 3 Cu 2 I 5 are prepared by thermal evaporation. By adjusting the proportion of the evaporation source, different phase structures and tunable PL characteristics are realized. Subsequently, with a UV light-emitting diode (310 nm) as the excitation source, standard white emission with Commission International de l'Eclairage coordinates of (0.333, 0.338) is observed when the molar ratio of CsI and CuI powders is 0.75:1. Cs−Cu−I nanoscalethick films with excellent air stability might have promising potential applications in white lighting sources.

Summary Wearable supercapacitors have broad application prospects in emerging portable devices. To realize the large‐scale application, it is necessary to develop a low‐cost and large‐scale method to fabricate wearable electrode with high electrochemical performance. Here, polyaniline supported by graphene coated polyester textile (PANI/GPT) electrode is prepared through a simple and low‐cost method. First, graphene ink with high concentration is prepared, and then the polyester textile is coated by graphene through a repeatedly soaking‐drying process. Subsequently, PANI/GPT electrode is prepared by electrochemical deposition of polyaniline (PANI) on graphene coated polyester textile. The ratio of PANI in the textile electrode has been systematically modified and the obtained textile electrode possesses good energy storage performance with specific capacitance reaching 896.50 F g−1 and good rate capability. The assembled flexible supercapacitor also owns excellent flexibility with capacitance retention of 95.10% after bending for up to 5000 cycles. Such high‐performance textile electrodes and the low‐cost method can be widely applied to develop other wearable energy storage devices.

Nanoclays have been developed as drug delivery systems, but their mechanisms of DOX delivery are unclear. Herein, unmodified nanoclays (halloysite, kaolinite, montmorillonite) were comprehensively studied on their in vitro binding and release mechanisms of DOX from both experimental and theoretical aspects. These nanoclays with high loading capacity (>50%) and encapsulation efficiency capacity (>90%) of DOX are attributed to the exposed hydroxyl groups and the Lewis base sites on the surfaces. Density functional theory calculations also confirmed that DOX is preferentially adsorbed on the Al–OH surfaces while adsorption on Si–O surfaces is limited. Besides this, the pH-responsive profiles of DOX release from nanoclays are related to the protonation of negatively charged nanoclays in weakly acidic solutions that makes it easier to dissociate with positively charged DOX. The in-depth mechanistic method in this work is widely applicable and demonstrates that nanoclays can be used as efficient nanocarriers for more biomedical applications.

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