Surface reactable modified silver nanoparticles were prepared by NaBH4 reduced silver ion in the aquenous solvent, in the presence of the double group modifying agent, O,O′-di(11-bromic undecane)dithiophosphonic acid...Surface reactable modified silver nanoparticles were prepared by NaBH4 reduced silver ion in the aquenous solvent, in the presence of the double group modifying agent, O,O′-di(11-bromic undecane)dithiophosphonic acid. The morphology and structure of the product were characterized using Transmission Electron Microscope(TEM), UV-Visible Absorption(UV-Vis) spectra, Fourier Transform Infrared(FTIR) spectra. The result indicate that the products are spherical shape and no aggregation, C-Br functional groups are on the outermost portion of the silver nanoparticles. The nanoparticles were well dispersed in organic solution, such as chloroform, petroleum ether, toluene etc. The analysis of the sample which reacted with trimethylamine by X-ray photoelectron spectra(XPS) shows the silver nanoparticles can undergo many reactions.展开更多
Zero-dimensional(0D)lead-free perovskites have garnered significant attention due to their unique optoelectronic properties and non-toxicity.However,the single response to stimuli in lead-free perovskites limits the v...Zero-dimensional(0D)lead-free perovskites have garnered significant attention due to their unique optoelectronic properties and non-toxicity.However,the single response to stimuli in lead-free perovskites limits the versatility of multifunctional compounds.In this study,we abandoned the toxic bromic acid and utilized water as the reaction medium,to achieve an environmentally friendly green chemical route.We successfully prepared a zero-dimensional lead-free halide Cs_(2)In_(1−x)Sb_(x)Br_(5)(H_(2)O)perovskite with a fractal structure using an in situ solution crystallization method.Herein,we discovered that the recrystallization occurred beneath the smooth-grown rhombic crystal surface,forming fractal branched crystals.Interestingly,reversible luminescence color transitions from orange-red to yellow and return to the initial state were achieved in response to the individual stimuli of temperature and humidity.We found that H_(2)O molecules played a crucial role in the color tuning,enabling reversible“on–off”switching modes with rapid modulation rates.Moreover,the 0D lead-free halide perovskite Cs_(2)InBr_(5)(H_(2)O):Sb^(3+)also exhibited excellent temperature sensitivity,with the relative sensitivity(SR)reaching up to 9.39%K^(−1).This study provides valuable insights for the further development of halide perovskites in design and application fields,laying a foundation for the development of multifunctional smart materials and temperature sensing applications.展开更多
文摘Surface reactable modified silver nanoparticles were prepared by NaBH4 reduced silver ion in the aquenous solvent, in the presence of the double group modifying agent, O,O′-di(11-bromic undecane)dithiophosphonic acid. The morphology and structure of the product were characterized using Transmission Electron Microscope(TEM), UV-Visible Absorption(UV-Vis) spectra, Fourier Transform Infrared(FTIR) spectra. The result indicate that the products are spherical shape and no aggregation, C-Br functional groups are on the outermost portion of the silver nanoparticles. The nanoparticles were well dispersed in organic solution, such as chloroform, petroleum ether, toluene etc. The analysis of the sample which reacted with trimethylamine by X-ray photoelectron spectra(XPS) shows the silver nanoparticles can undergo many reactions.
基金funding from the National Natural Science Foundation of China(52073165).
文摘Zero-dimensional(0D)lead-free perovskites have garnered significant attention due to their unique optoelectronic properties and non-toxicity.However,the single response to stimuli in lead-free perovskites limits the versatility of multifunctional compounds.In this study,we abandoned the toxic bromic acid and utilized water as the reaction medium,to achieve an environmentally friendly green chemical route.We successfully prepared a zero-dimensional lead-free halide Cs_(2)In_(1−x)Sb_(x)Br_(5)(H_(2)O)perovskite with a fractal structure using an in situ solution crystallization method.Herein,we discovered that the recrystallization occurred beneath the smooth-grown rhombic crystal surface,forming fractal branched crystals.Interestingly,reversible luminescence color transitions from orange-red to yellow and return to the initial state were achieved in response to the individual stimuli of temperature and humidity.We found that H_(2)O molecules played a crucial role in the color tuning,enabling reversible“on–off”switching modes with rapid modulation rates.Moreover,the 0D lead-free halide perovskite Cs_(2)InBr_(5)(H_(2)O):Sb^(3+)also exhibited excellent temperature sensitivity,with the relative sensitivity(SR)reaching up to 9.39%K^(−1).This study provides valuable insights for the further development of halide perovskites in design and application fields,laying a foundation for the development of multifunctional smart materials and temperature sensing applications.
