Light regulation devices are essential for signal modulation, information encryption and energy-saving smart windows. Recently, due to their excellent stimuli-responsive properties, lead halide perovskites have shown ...Light regulation devices are essential for signal modulation, information encryption and energy-saving smart windows. Recently, due to their excellent stimuli-responsive properties, lead halide perovskites have shown great potential. However, the high transition temperature, irreversibility of the phase transition and toxicity of heavy metals make perovskite materials unsuitable for devices related to human activity. Herein, for the first time, a flexible perovskite nano-network is proposed and its application as a smart window is demonstrated. The perovskite-sodium alginate(SA) nano-network showed a 31.6 ℃(20% RH) transition temperature and stability over 1200 cycles. The hydrophobic surface and the “eggbox” structure formed by SA make that the lead leakage is only 2.569 ppb, which is much higher than the drinking water standard. This work provides a successful demonstration for energy-efcient buildings and inspires future nontoxic perovskite-based devices through heavy metal control.展开更多
In this study,medium-and long-chain triacylglycerol(MLCT)structured lipids were synthesized by lipase catalyzed acidolysis of lauric acid(La)with four kinds of common edible oils of different fatty acid compositions,i...In this study,medium-and long-chain triacylglycerol(MLCT)structured lipids were synthesized by lipase catalyzed acidolysis of lauric acid(La)with four kinds of common edible oils of different fatty acid compositions,including palm oil(PO),camellia oleifera seed oil(CSO),soybean oil(SO)and flaxseed oil(FO).The lipases and reaction conditions including substrate molar ratio,reaction temperature,(time and enzyme loading)were optimized.The physicochemical properties of their MLCT products were determined.Moreover,the interaction mechanism between lipase and different MLCT molecules was revealed.The obtained optimum conditions were as follows:substrate molar ratios of 3:1(La/oil)for FO,SO,and CSO,7:1 for PO;enzyme loading of 8%,reaction temperature of 50℃,and reaction time of 6 h for PO,4 h for SO and 3 h for CSO and FO.Under the conditions,the product based on PO had the highest La content(40.37%)and MLCT yield(94.85%),followed by FO and SO,(29.86%,29.71%and 88.41%,87.55%,respectively),least on CSO(25.40%and 81.79%).The lipase established hydrogen bonds and hydrophobic interactions with triacylglycerol ligands.Triacylglycerol 1(3),2-Linolenin-3(1)-Laurin(LnLnLa,specific in FO-MLCT)exhibited strongest binding activity with Lipozyme RM.Compared with substrate oils,the corresponding MLCT structured lipids showed improved thermal behavior and significant differences in the crystallization temperature as a result of acidolysis esterification.This study developed diverse MLCTs with La,and provided an in-depth understanding of the relationships between substrate composition,interaction,and MLCT structured lipids.展开更多
Deciphering the composite information within a light field through a single photodetector,without optical and mechanical structures,is challenging.The difficulty lies in extracting multi-dimensional optical informatio...Deciphering the composite information within a light field through a single photodetector,without optical and mechanical structures,is challenging.The difficulty lies in extracting multi-dimensional optical information from a single dimension of photocurrent.Emerging photodetectors based on information reconstruction have potential,yet they only extract information contained in the photoresponse current amplitude(responsivity matrix),neglecting the hidden information in response edges driven by carrier dynamics.Herein,by adjusting the thickness of the absorption layer and the interface electric field strength in the perovskite photodiode,we extend the transport and relaxation time of carriers excited by photons of different wavelengths,maximizing the spectrum richness of the edge waveform in the light-dark transition process.For the first time,without the need for extra optical and electrical components,the reconstruction of two-dimensional information of light intensity and wavelength has been achieved.With the integration of machine learning algorithms into waveform data analysis,a wide operation spectrum range of 350–750 nm is available with a 100%accuracy rate.The restoration error has been lowered to less than 0.1%for light intensity.This work offers valuable insights for advancing perovskite applications in areas such as wavelength identification and spectrum imaging.展开更多
基金support from the National Natural Science Foundation of China (52025028,51772197,5187219152002258)+6 种基金the 1000 Youth Talents Planthe Shandong Provincial Natural Science Foundation (Nos.ZR2021JQ16,ZR2019YQ19)the Project of Shandong Province Higher Educational Science and Technology Program (No.2019KJA026)the State Key Laboratory of Bio-Fibers and Eco-Textiles (Nos.ZKT13,ZKT11)Science and technology project of Shinan District (No.2020-2-003-QT)the Natural Science Foundation of Jiangsu Province (Nos.BK20200877,BK20210728)Funded by the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions。
文摘Light regulation devices are essential for signal modulation, information encryption and energy-saving smart windows. Recently, due to their excellent stimuli-responsive properties, lead halide perovskites have shown great potential. However, the high transition temperature, irreversibility of the phase transition and toxicity of heavy metals make perovskite materials unsuitable for devices related to human activity. Herein, for the first time, a flexible perovskite nano-network is proposed and its application as a smart window is demonstrated. The perovskite-sodium alginate(SA) nano-network showed a 31.6 ℃(20% RH) transition temperature and stability over 1200 cycles. The hydrophobic surface and the “eggbox” structure formed by SA make that the lead leakage is only 2.569 ppb, which is much higher than the drinking water standard. This work provides a successful demonstration for energy-efcient buildings and inspires future nontoxic perovskite-based devices through heavy metal control.
基金supported by the National Natural Science Foundation of China(32372469,32302223 and 31871763)Basic Scientific Research Project of Zhejiang University of Science and Technology(2023QN032)+1 种基金Zhejiang Province Key Science and Technology Projects(2023C02042,2023C02045)Agriculture and Social Development Projects of Hangzhou(202203A11).
文摘In this study,medium-and long-chain triacylglycerol(MLCT)structured lipids were synthesized by lipase catalyzed acidolysis of lauric acid(La)with four kinds of common edible oils of different fatty acid compositions,including palm oil(PO),camellia oleifera seed oil(CSO),soybean oil(SO)and flaxseed oil(FO).The lipases and reaction conditions including substrate molar ratio,reaction temperature,(time and enzyme loading)were optimized.The physicochemical properties of their MLCT products were determined.Moreover,the interaction mechanism between lipase and different MLCT molecules was revealed.The obtained optimum conditions were as follows:substrate molar ratios of 3:1(La/oil)for FO,SO,and CSO,7:1 for PO;enzyme loading of 8%,reaction temperature of 50℃,and reaction time of 6 h for PO,4 h for SO and 3 h for CSO and FO.Under the conditions,the product based on PO had the highest La content(40.37%)and MLCT yield(94.85%),followed by FO and SO,(29.86%,29.71%and 88.41%,87.55%,respectively),least on CSO(25.40%and 81.79%).The lipase established hydrogen bonds and hydrophobic interactions with triacylglycerol ligands.Triacylglycerol 1(3),2-Linolenin-3(1)-Laurin(LnLnLa,specific in FO-MLCT)exhibited strongest binding activity with Lipozyme RM.Compared with substrate oils,the corresponding MLCT structured lipids showed improved thermal behavior and significant differences in the crystallization temperature as a result of acidolysis esterification.This study developed diverse MLCTs with La,and provided an in-depth understanding of the relationships between substrate composition,interaction,and MLCT structured lipids.
基金supported by the National Natural Science Foundation of China(52025028,52332008,52202273,52422208,and U23A20571)the Natural Science Foundation of Jiangsu Province(BK20210728)Funded by the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions.
文摘Deciphering the composite information within a light field through a single photodetector,without optical and mechanical structures,is challenging.The difficulty lies in extracting multi-dimensional optical information from a single dimension of photocurrent.Emerging photodetectors based on information reconstruction have potential,yet they only extract information contained in the photoresponse current amplitude(responsivity matrix),neglecting the hidden information in response edges driven by carrier dynamics.Herein,by adjusting the thickness of the absorption layer and the interface electric field strength in the perovskite photodiode,we extend the transport and relaxation time of carriers excited by photons of different wavelengths,maximizing the spectrum richness of the edge waveform in the light-dark transition process.For the first time,without the need for extra optical and electrical components,the reconstruction of two-dimensional information of light intensity and wavelength has been achieved.With the integration of machine learning algorithms into waveform data analysis,a wide operation spectrum range of 350–750 nm is available with a 100%accuracy rate.The restoration error has been lowered to less than 0.1%for light intensity.This work offers valuable insights for advancing perovskite applications in areas such as wavelength identification and spectrum imaging.
