Cesium lead halide perovskite nanocrystals(NCs)have attracted unprecedented attention owing to their compelling properties for optoelectronic applications.Compared with the classical hot-injection method,the roomtempe...Cesium lead halide perovskite nanocrystals(NCs)have attracted unprecedented attention owing to their compelling properties for optoelectronic applications.Compared with the classical hot-injection method,the roomtemperature(RT)synthetic strategy is more facile and tender,but it is hard to obtain stable CsPbI3 NCs and it usually uses polar solvents that sometimes reduce the stability and properties of NCs.Here,we reported a simple approach to synthesize highly efficient and stable CsPbI3 as well as other colortunable CsPbX3 NCs with high quantum efficiency at room temperature via an anion exchange at the water-oil interface,in which the as-synthesized pristine CsPbBr3 NCs in toluene were treated in aqueous solutions of HX(X=Cl,Br,and I)and protonated oleylamine(OAm)acted as a carrier.The synthesized CsPbI3 NCs had an emission at 680 nm and even showed excellent colloidal stability after being stored for 32 d.The high efficiency and stability of the obtained CsPbX3 NCs were ascribed to the facts that:(ⅰ)the polar reagents were almost removed from the surface of NCs;(ⅱ)the defect-related nonradiative recombination was suppressed efficiently by surface passivation.展开更多
目的:分析施予糖尿病患者健康教育对提升其自我管理水平的有效性。方法:选择90例于2015年6月至2016年6月进入广州市番禺区石楼镇社区卫生服务中心接受治疗的糖尿病患者,随机分组,45例的分析组在治疗中施予健康教育,45例的对比组行常规...目的:分析施予糖尿病患者健康教育对提升其自我管理水平的有效性。方法:选择90例于2015年6月至2016年6月进入广州市番禺区石楼镇社区卫生服务中心接受治疗的糖尿病患者,随机分组,45例的分析组在治疗中施予健康教育,45例的对比组行常规性管理,比对管理前后两组患者自我管理水平。结果:干预后,分析组各维度自我管理能力评分均较对比组高,分析组空腹血糖(FPG)、餐后2 h血糖(2 h PG)、糖化血红蛋白(Hba1c)改善程度明显较对比组优越(P<0.05)。结论:对糖尿病患者实施健康教育,可使患者自我管理能力提升,从而对患者血糖进行有效控制。展开更多
基金supported by the Natural Science Foundation of Fujian Province(2019J05041)the Education Foundation of Fujian Province(JAT170021)the“Double-First Class”Foundation of Materials and Intelligent Manufacturing Discipline of Xiamen University。
文摘Cesium lead halide perovskite nanocrystals(NCs)have attracted unprecedented attention owing to their compelling properties for optoelectronic applications.Compared with the classical hot-injection method,the roomtemperature(RT)synthetic strategy is more facile and tender,but it is hard to obtain stable CsPbI3 NCs and it usually uses polar solvents that sometimes reduce the stability and properties of NCs.Here,we reported a simple approach to synthesize highly efficient and stable CsPbI3 as well as other colortunable CsPbX3 NCs with high quantum efficiency at room temperature via an anion exchange at the water-oil interface,in which the as-synthesized pristine CsPbBr3 NCs in toluene were treated in aqueous solutions of HX(X=Cl,Br,and I)and protonated oleylamine(OAm)acted as a carrier.The synthesized CsPbI3 NCs had an emission at 680 nm and even showed excellent colloidal stability after being stored for 32 d.The high efficiency and stability of the obtained CsPbX3 NCs were ascribed to the facts that:(ⅰ)the polar reagents were almost removed from the surface of NCs;(ⅱ)the defect-related nonradiative recombination was suppressed efficiently by surface passivation.
文摘目的:分析施予糖尿病患者健康教育对提升其自我管理水平的有效性。方法:选择90例于2015年6月至2016年6月进入广州市番禺区石楼镇社区卫生服务中心接受治疗的糖尿病患者,随机分组,45例的分析组在治疗中施予健康教育,45例的对比组行常规性管理,比对管理前后两组患者自我管理水平。结果:干预后,分析组各维度自我管理能力评分均较对比组高,分析组空腹血糖(FPG)、餐后2 h血糖(2 h PG)、糖化血红蛋白(Hba1c)改善程度明显较对比组优越(P<0.05)。结论:对糖尿病患者实施健康教育,可使患者自我管理能力提升,从而对患者血糖进行有效控制。
