molecules and metal quantum dots (QDs). [1] So far, CDs have been explored in various fields, such as light emitting devices, [2] fluorescent cellular imagination, [3] anti-counterfeiting, [4] and visualized tumor therapy. [3a,5] However, further development and application of CDs have been limited by the aggregation-caused quenching (ACQ) of solid-state fluorescence (SSF) from the direct π-π stacking. [6] As opposed to the phenomenon of ACQ, aggregation-induced emission (AIE) effects were first reported by Tang et al. [7] In recent years, AIE CDs-based materials have been reported and several rational strategies have been proposed to generate and enhance the fluorescence in the aggregation state. [1a,8] However, CDs with dual emission peaks always fail to show AIE effects, and CDs achieving AIE especially red/orange fluorescence exhibit only single emission peak in solid state. [8b,9] Hence, the development CDs with dual emission, or even multi-emission peaks and embedded AIE effects can lead to significant breakthrough in extensive application fields such as LEDs and information encryption.More interestingly, the room-temperature phosphorescence (RTP) characteristic of CDs has been discovered recently, [10] which makes CDs highly potential in many fields of practical applications, including bioimaging, optoelectronic devices, and information security/protection. [11] Despite the efforts devoted to developing RTP CDs, [11b,12] most current RTP materials exhibit phosphorescence only in their solid anhydrous states, in which CDs can be fixed by the matrix. Phosphorescence quenching typically takes place in the presence of water as water molecules usually break up hydrogen-bonding interactions between CDs and matrices. [13] As a result, the aqueous application of RTP materials is significantly hindered, particularly in the fields of multi-information encryption. [14] Therefore, as more as we know, it is very challenging to achieve both dual fluorescence emission AIE and RTP in aqueous state.From this perspective, carbon dots named E-CCDs with dual emission luminescence and RTP characteristic are synthesized by an eco-friendly, low-cost one-pot solvothermal method. E-CCDs exhibit blue fluorescence when well-dispersed in organic solvents, then change to red fluorescence when water is added, which also have a long phosphorescence lifetime. The As one of the most promising fluorescent nanomaterials, carbon dots (CDs) are extensively studied. Nevertheless, one-pot synthesis methods for CDs with both dual emission aggregation-induced emission (AIE) and roomtemperature phosphorescence (RTP) could lead to significant breakthrough in extensive application fields. Herein, a new class of CDs (E-CCDs) with reversible luminescence (blue dissolved fluorescence and red AIE) and RTP behavior is obtained with an eco-friendly, low-cost one-pot solvothermal method. E-CCDs exhibit dual fluorescence emission at 460 (Em-1) and 600 nm (Em-2), which is related to different emission centers. The addition of cyanic acid enhanc...

To obtain a super‐toughness and low seepage threshold for the conductivity of biodegradable soft polymer material, biodegradable polybutylene succinate (PBS)‐based composites with different contents of polyvinyl butyral (PVB) and multi‐wall carbon nanotubes (MWCNTs) were prepared by melt‐blending method. Synergy effects of different modified MWCNTs and PVB on the morphology, crystallization, and electrical and mechanical properties of MWCNTs/PVB/PBS composites were examined by Fourier Transform Infrared Spectroscopy (FTIR), scanning electron microscope (SEM), transmission electron microscopy (TEM), wide angle X‐ray diffraction (WAXD), differential scanning calorimetry (DSC), polarizing microscope (POM), resistance tester, and universal testing machine. Compared with pure PBS, with increasing MWCNT content, the electrical conductivity of the MWCNTs/PBS composites showed an upward trend, and the percolation threshold for electrical conductivity of the MWCNTs/PBS composites reached 0.47%. The electrical conductivity of the PBS composite mixed with 1.0 wt% of surface modified MWCNTs slightly increased by one order of magnitude compared with that of pure PBS. By adding 20 wt% of the PVB and 1 wt% of the unmodified MWCNTs, the electrical conductivity of the MWCNTs/PVB/PBS composite increased by seven orders of magnitude compared with that of pure PBS. The percolation threshold for electrical conductivity of the MWCNTs/PVB/PBS composites decreased to 0.049% owing to the formation of double percolation structure. Furthermore, compared with pure PBS, when the PVB content was 20 wt%, and the MWCNTs was 1 wt%, the elongation at break and V‐notch impact strength of PBS‐based composite dramatically increased by approximately 300% and 12‐fold, respectively.

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