Controllable Self-Assembly Enabling the Stabilization of Deep Blue Emitting CsPbBr₃ Nanoplatelets

Ultrathin pure bromide metal halide perovskite nanoplatelets (MHP NPLs) are expected to achieve high-purity pure blue and even deep blue emission. However, the optical properties of ultrathin NPLs are extremely unstable because they tend to self-assemble and fuse into large particles. Here, we find that the deep blue emitting NPLs can be stabilized by controlling the self-assembly behavior. By partial exchange of the surface ligand of aliphatic acid with aromatic acid, the self-assembly configuration can be effectively controlled, endowing stable face-to-face self-assembled configurations. The resultant NPL superlattices can retain blue emission for over half a month, while the control samples will red-shift within a few hours. The molecular simulation results reveal that the aromatic acid ligand has a strong passivation capacity on the NPL surface and moderate intermolecular van der Waals interactions. Therefore, by tuning the benzoic acid concentration, the intrinsic optical properties of individual NPLs can be stabilized in the form of self-assembly, avoiding crystal regrowth and exciton delocalization. This controllable self-assembly of ultrathin MHP NPLs benefits fundamental research in the field of perovskite nanocrystal superlattices and broadens the possibilities for perovskites for blue emission

Table_3_Repeated mechanical damage enhanced Aquilaria sinensis resistance to Heortia vitessoides through jasmonic acid.docx

IntroductionThe leaf-chewing pest Heortia vitessoides severely threatens the growth and development of Aquilaria sinensis. In our previous study, we found that mechanical damage (MD) to stem enhanced A. sinensis sapling resistance to H. vitessoides larvae.MethodsTo reveal the defense mechanisms underlying this observation, we analyzed the types and contents of volatile organic compounds (VOCs), phytohormone contents, and expression of phytohormone-related genes in response to MD and herbivory wounding(HW).ResultsHere, we identified several VOCs, such as the pesticides fenobucarb and 2,4-di-tert-butylphenol, in mature leaf (ML) of MD-treated plants. Compared with salicylic acid (SA) or the ethylene (ET) pathway, jasmonic acid (JA) content and JA-related genes were more strongly upregulated. Interestingly, we found a dramatic difference between JA-related upstream and downstream genes expression in YL and ML, which confirmed that JA-Ile accumulation in MD-ML and HW-ML could be derived from local damaged site.DiscussionTaken together, we provide evidence that the JA pathway plays a dominant role in the A. sinensis response to MD and HW.</p

DataSheet_1_Repeated mechanical damage enhanced Aquilaria sinensis resistance to Heortia vitessoides through jasmonic acid.docx

IntroductionThe leaf-chewing pest Heortia vitessoides severely threatens the growth and development of Aquilaria sinensis. In our previous study, we found that mechanical damage (MD) to stem enhanced A. sinensis sapling resistance to H. vitessoides larvae.MethodsTo reveal the defense mechanisms underlying this observation, we analyzed the types and contents of volatile organic compounds (VOCs), phytohormone contents, and expression of phytohormone-related genes in response to MD and herbivory wounding(HW).ResultsHere, we identified several VOCs, such as the pesticides fenobucarb and 2,4-di-tert-butylphenol, in mature leaf (ML) of MD-treated plants. Compared with salicylic acid (SA) or the ethylene (ET) pathway, jasmonic acid (JA) content and JA-related genes were more strongly upregulated. Interestingly, we found a dramatic difference between JA-related upstream and downstream genes expression in YL and ML, which confirmed that JA-Ile accumulation in MD-ML and HW-ML could be derived from local damaged site.DiscussionTaken together, we provide evidence that the JA pathway plays a dominant role in the A. sinensis response to MD and HW.</p

Table_2_Repeated mechanical damage enhanced Aquilaria sinensis resistance to Heortia vitessoides through jasmonic acid.xls

IntroductionThe leaf-chewing pest Heortia vitessoides severely threatens the growth and development of Aquilaria sinensis. In our previous study, we found that mechanical damage (MD) to stem enhanced A. sinensis sapling resistance to H. vitessoides larvae.MethodsTo reveal the defense mechanisms underlying this observation, we analyzed the types and contents of volatile organic compounds (VOCs), phytohormone contents, and expression of phytohormone-related genes in response to MD and herbivory wounding(HW).ResultsHere, we identified several VOCs, such as the pesticides fenobucarb and 2,4-di-tert-butylphenol, in mature leaf (ML) of MD-treated plants. Compared with salicylic acid (SA) or the ethylene (ET) pathway, jasmonic acid (JA) content and JA-related genes were more strongly upregulated. Interestingly, we found a dramatic difference between JA-related upstream and downstream genes expression in YL and ML, which confirmed that JA-Ile accumulation in MD-ML and HW-ML could be derived from local damaged site.DiscussionTaken together, we provide evidence that the JA pathway plays a dominant role in the A. sinensis response to MD and HW.</p

Table_1_Repeated mechanical damage enhanced Aquilaria sinensis resistance to Heortia vitessoides through jasmonic acid.xls

IntroductionThe leaf-chewing pest Heortia vitessoides severely threatens the growth and development of Aquilaria sinensis. In our previous study, we found that mechanical damage (MD) to stem enhanced A. sinensis sapling resistance to H. vitessoides larvae.MethodsTo reveal the defense mechanisms underlying this observation, we analyzed the types and contents of volatile organic compounds (VOCs), phytohormone contents, and expression of phytohormone-related genes in response to MD and herbivory wounding(HW).ResultsHere, we identified several VOCs, such as the pesticides fenobucarb and 2,4-di-tert-butylphenol, in mature leaf (ML) of MD-treated plants. Compared with salicylic acid (SA) or the ethylene (ET) pathway, jasmonic acid (JA) content and JA-related genes were more strongly upregulated. Interestingly, we found a dramatic difference between JA-related upstream and downstream genes expression in YL and ML, which confirmed that JA-Ile accumulation in MD-ML and HW-ML could be derived from local damaged site.DiscussionTaken together, we provide evidence that the JA pathway plays a dominant role in the A. sinensis response to MD and HW.</p