3 results about "Self aggregation" patented technology

This invention discloses a time-locked fiber self-erasing material with a step-by-step decryption function for special information transmission, its preparation method, and its anti-counterfeiting applications. The material is prepared by chemically grafting amino-modified phosphors onto the surface of carboxylated cellulose nanocrystals, followed by electrostatic attraction between the phosphors and gold nanoclusters stabilized by the carboxylated cellulose nanocrystals. The material of this invention uses carboxylated cellulose nanocrystals as a bridge connecting the donor and acceptor, inhibiting the self-aggregation of gold nanoclusters, enhancing fluorescence intensity and stability, and improving the energy transfer efficiency between the donor and acceptor. Based on changes in the degree of energy transfer, the time-locked fiber self-erasing material exhibits a color pattern over a time scale, adjusted by the donor-acceptor ratio.

This invention relates to the field of intelligent organic optoelectronic materials technology, specifically disclosing a photostimulation-responsive organic long-afterglow material and its preparation method. This invention is based on benzo[a]carbazole or naphthylamine derivatives with excellent long-afterglow performance, and by introducing diphenylphosphoxy groups to form a resonance system, it endows the material with excellent stimulus-response characteristics. Furthermore, using polymethyl methacrylate (PMMA) as the main component significantly avoids the quenching effect caused by self-aggregation. It also protects triplet excitons from quenching by triplet oxygen molecules, thereby enabling room-temperature phosphorescence. This material system exhibits significant photoactivation performance under photostimulation, with a visible afterglow exceeding 8 s, and possesses the characteristic that steady-state luminescence and afterglow luminescence can be co-activated. The material system provided by this invention has the following advantages: simple preparation process, low cost, and easy product purification; the obtained composite film exhibits long-lifetime and highly stable organic afterglow; its unique steady-state and afterglow synergistic photostimulation response characteristics provide a new solution for dynamic information encryption and afterglow imaging.