Cs_(2)TiBr_(6) nanocrystals(NCs)are a type of promising optoelectronic materials,owing to their high photoelectric properties and non-toxicity.Here,we synthesize the colloidal Cs_(2)TiBr_(6)NCs using a hot-injection a...Cs_(2)TiBr_(6) nanocrystals(NCs)are a type of promising optoelectronic materials,owing to their high photoelectric properties and non-toxicity.Here,we synthesize the colloidal Cs_(2)TiBr_(6)NCs using a hot-injection approach.The temperaturedependent absorption data shows that its energy band changes about 30 me V with temperature,reflecting that its energy band structure is much stable.The excitation intensity-dependent transient absorption data confirms its linear absorption cross-sections and carrier recombination rate constants,involving monomolecular and bimolecular recombination,which are all superior to those of conventional perovskite bromide counterparts.In addition,its nonlinear absorption cross-sections are also measured based on femtosecond Z-scan.Our results suggest that Cs_(2)TiBr_(6)NCs can be extensively applied in the field of optoelectronics,owing to its excellent carrier dynamics and nonlinear optical properties.展开更多
花青素在黑果腺肋花楸中含量丰富,其具有抗氧化、抗炎抑菌、防治糖尿病、心血管保护以及抗癌、保肝等多种生物活性。本文通过查阅近年来国内外黑果腺肋花楸花青素的研究进展,对花青素提取工艺及生物活性等进行了综述。期望可以为我国在...花青素在黑果腺肋花楸中含量丰富,其具有抗氧化、抗炎抑菌、防治糖尿病、心血管保护以及抗癌、保肝等多种生物活性。本文通过查阅近年来国内外黑果腺肋花楸花青素的研究进展,对花青素提取工艺及生物活性等进行了综述。期望可以为我国在黑果腺肋花楸相关领域的研究进程和开发利用提供参考依据,从而深入挖掘黑果腺肋花楸的潜在价值与应用前景。Anthocyanins are abundant in Aronia melanocarpa, and they have multiple biological activities, including antioxidant, anti-inflammatory and antibacterial capabilities, as well as being effective in the prevention and treatment of diabetes, providing cardiovascular protection, possessing anti-cancer properties, and having a liver-protective function. Based on the research results of anthocyanins in Aronia melanocarpa at home and abroad in recent years, this paper reviews the extraction process and biological activities of anthocyanins. It is expected that it can provide a reference for the research process and development and utilization in the related fields of Aronia melanocarpa in China, so as to deeply explore the potential value and application prospects of Aronia melanocarpa.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.61804063)the Natural Science Foundation of Jilin Province,China(Grant No.20190201208JC)。
文摘Cs_(2)TiBr_(6) nanocrystals(NCs)are a type of promising optoelectronic materials,owing to their high photoelectric properties and non-toxicity.Here,we synthesize the colloidal Cs_(2)TiBr_(6)NCs using a hot-injection approach.The temperaturedependent absorption data shows that its energy band changes about 30 me V with temperature,reflecting that its energy band structure is much stable.The excitation intensity-dependent transient absorption data confirms its linear absorption cross-sections and carrier recombination rate constants,involving monomolecular and bimolecular recombination,which are all superior to those of conventional perovskite bromide counterparts.In addition,its nonlinear absorption cross-sections are also measured based on femtosecond Z-scan.Our results suggest that Cs_(2)TiBr_(6)NCs can be extensively applied in the field of optoelectronics,owing to its excellent carrier dynamics and nonlinear optical properties.
文摘花青素在黑果腺肋花楸中含量丰富,其具有抗氧化、抗炎抑菌、防治糖尿病、心血管保护以及抗癌、保肝等多种生物活性。本文通过查阅近年来国内外黑果腺肋花楸花青素的研究进展,对花青素提取工艺及生物活性等进行了综述。期望可以为我国在黑果腺肋花楸相关领域的研究进程和开发利用提供参考依据,从而深入挖掘黑果腺肋花楸的潜在价值与应用前景。Anthocyanins are abundant in Aronia melanocarpa, and they have multiple biological activities, including antioxidant, anti-inflammatory and antibacterial capabilities, as well as being effective in the prevention and treatment of diabetes, providing cardiovascular protection, possessing anti-cancer properties, and having a liver-protective function. Based on the research results of anthocyanins in Aronia melanocarpa at home and abroad in recent years, this paper reviews the extraction process and biological activities of anthocyanins. It is expected that it can provide a reference for the research process and development and utilization in the related fields of Aronia melanocarpa in China, so as to deeply explore the potential value and application prospects of Aronia melanocarpa.
