Photoresponsive materials have been widely used in sensing,bioimaging,molecular switches,information storage,and encryption nowadays.Although a large amount of photoresponsive materials have been reported,the construc...Photoresponsive materials have been widely used in sensing,bioimaging,molecular switches,information storage,and encryption nowadays.Although a large amount of photoresponsive materials have been reported,the construction of these smart materials into precisely prescribed complex 3D geometries is rarely studied.Here we designed a novel photoresponsive material methyl methacrylate containing triphenylethylene(TrPEF_(2)-MA)that can be directly used for digital light processing(DLP)3D printing.Based on TrPEF_(2)-MA,a series of photoresponsive 3D structures with reversible color switching under ultraviolet/visible light irradiations were fabricated.These complex photoresponsive 3D structures show high resolutions(50μm),excellent repeatability(25 cycles without fatigue),and tunable saturate color degrees.Multicomponent DLP 3D printing processes were also carried out to demonstrate their great properties in information hiding and information-carrying properties.This design strategy for constructing photoresponsive 3D structures is attractive in the area of adaptive camouflage,information hiding,information storage,and flexible electronics.展开更多
The propagation of surface acoustic waves(SAWs) in two-dimensional phononic crystals(PnCs) with and without coupling-enhancement slabs was theoretically investigated using a three-dimensional finite element method.Dif...The propagation of surface acoustic waves(SAWs) in two-dimensional phononic crystals(PnCs) with and without coupling-enhancement slabs was theoretically investigated using a three-dimensional finite element method.Different piezoelectric substrates,for example,lithium niobate(LiNbO_3),gallium nitride(GaN),and aluminium nitride(A1N),were taken into account.Compared to the PnCs without coupling-enhancement slabs,the coupling between each pillar and its nearest neighbor was largely enhanced in the presence of slabs.The bandwidth of the first directional band gap increased markedly compared with its initial value for the PnCs without a slab(within square symmetry).In addition,with increasing thicknesses of the slabs bonded between neighboring pillars,the first directional band-gap and second directional band gap of the PnCs tend to merge.Therefore,the structure with coupling-enhancement slabs can be used as an excellent electrical band elimination filter for most electro-SAW devices,offering a new strategy to realize chip-scale applications in electroacoustic signal processing,optoacoustic modulation,and even SAW microfluidic devices.展开更多
Microorganisms were reported to be the indicators and drivers of metal(loid)s-contaminated soils.Chloroflexota is a widelydistributed phylum in arsenic(As)and antimony(Sb)contaminated soils,but the diversity and funct...Microorganisms were reported to be the indicators and drivers of metal(loid)s-contaminated soils.Chloroflexota is a widelydistributed phylum in arsenic(As)and antimony(Sb)contaminated soils,but the diversity and functional potential of its genomes remain largely unknown.In this study,we collected As and Sb contaminated soils from smelting-affected agricultural soils and mining soils,with the latter exhibiting much higher concentrations of As(mean 19421.2 mg kg^(‒1))and Sb(mean 4953.5 mg kg^(‒1))as well as lower carbon and nitrogen levels.We reconstructed 170 medium-to high-quality metagenome-assembled genomes(MAGs)of Chloroflexota from these soils.A total of 11 MAGs were proposed as novel candidate species,including 3 novel candidate genera affiliated with the classes Ktedonobacteria,Limnocylindria,and Dormibacteria.Functional annotation reveals that many MAGs from Ktedonobacteria and Dormibacteria may have novel potential for carbon fixation through the Calvin-Benson-Bassham cycle.Additionally,many Chloroflexota MAGs harbored essential genes involved in enhancing soil phosphorus(P)availability.In Chloroflexota MAGs,the gene responsible for extracellular oxidation,dldH,rather than the intracellular oxidation gene arsO,was widespread for Sb(III)oxidation.Under heavy As and Sb contamination and nutrient limitation,Chloroflexota MAGs exhibited higher guanine-cytosine contents and smaller genome sizes.Moreover,MAGs derived from these conditions were enriched with a higher proportion of genes related to Sb oxidation,As/P transport,As reduction and methylation,as well as pathways involved in carbohydrate degradation and bioavailable nitrogen biosynthesis.These findings might be helpful for developing bioremediation strategy for Chloroflexota in As/Sb contaminated soils.展开更多
基金The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China(51703253)the Fundamental Research Funds for the Central Universities,Key Research and Development Program of Shaanxi Province(2020GXLH-Z-010)+6 种基金the Chongqing Science and Technology Fund(cstc2020jcyj-msxmX0931)the Guangdong Basic and Applied Basic Research Foundation(2021A1515010633)the Ningbo Natural Science Foundation(202003N4060)the National Aerospace Science Foundation of China(2020Z073053007)the China Postdoctoral Science Foundation(2021M692624)the Natural Science Basic Research Program of Shaanxi Province(2022JQ-583)the Henan Key Laboratory of Special Protective Materials(Grant No.SZKFKT202106).
文摘Photoresponsive materials have been widely used in sensing,bioimaging,molecular switches,information storage,and encryption nowadays.Although a large amount of photoresponsive materials have been reported,the construction of these smart materials into precisely prescribed complex 3D geometries is rarely studied.Here we designed a novel photoresponsive material methyl methacrylate containing triphenylethylene(TrPEF_(2)-MA)that can be directly used for digital light processing(DLP)3D printing.Based on TrPEF_(2)-MA,a series of photoresponsive 3D structures with reversible color switching under ultraviolet/visible light irradiations were fabricated.These complex photoresponsive 3D structures show high resolutions(50μm),excellent repeatability(25 cycles without fatigue),and tunable saturate color degrees.Multicomponent DLP 3D printing processes were also carried out to demonstrate their great properties in information hiding and information-carrying properties.This design strategy for constructing photoresponsive 3D structures is attractive in the area of adaptive camouflage,information hiding,information storage,and flexible electronics.
基金supported by the National Basic Research Program of China (GrantNos.2013CB632904,and 2013CB63 2702)the National Nature Science Foundation of China(Grant Nos.11134006,11625418,11474158,and 51472114)+1 种基金the Natural Science Foundation of Jiangsu Province(Grant No.BK20140019)the project funded by the Priority Academic Program Development of Jiangsu Higher Education
文摘The propagation of surface acoustic waves(SAWs) in two-dimensional phononic crystals(PnCs) with and without coupling-enhancement slabs was theoretically investigated using a three-dimensional finite element method.Different piezoelectric substrates,for example,lithium niobate(LiNbO_3),gallium nitride(GaN),and aluminium nitride(A1N),were taken into account.Compared to the PnCs without coupling-enhancement slabs,the coupling between each pillar and its nearest neighbor was largely enhanced in the presence of slabs.The bandwidth of the first directional band gap increased markedly compared with its initial value for the PnCs without a slab(within square symmetry).In addition,with increasing thicknesses of the slabs bonded between neighboring pillars,the first directional band-gap and second directional band gap of the PnCs tend to merge.Therefore,the structure with coupling-enhancement slabs can be used as an excellent electrical band elimination filter for most electro-SAW devices,offering a new strategy to realize chip-scale applications in electroacoustic signal processing,optoacoustic modulation,and even SAW microfluidic devices.
基金financially supported by the National Key Research and Development Program of China(Grant No.2020YFC1807700)by complementary fund from the Guizhou Provincial Department of Science and Technology+2 种基金by Guizhou Provincial 2021 Science and Technology Subsidies(Grant No.GZ2021SIG)by the Chinese Academy of Sciences"Light of West China"Programby Guizhou Provincial Science and Technology Projects(Grant No.ZK[2022]328).
文摘Microorganisms were reported to be the indicators and drivers of metal(loid)s-contaminated soils.Chloroflexota is a widelydistributed phylum in arsenic(As)and antimony(Sb)contaminated soils,but the diversity and functional potential of its genomes remain largely unknown.In this study,we collected As and Sb contaminated soils from smelting-affected agricultural soils and mining soils,with the latter exhibiting much higher concentrations of As(mean 19421.2 mg kg^(‒1))and Sb(mean 4953.5 mg kg^(‒1))as well as lower carbon and nitrogen levels.We reconstructed 170 medium-to high-quality metagenome-assembled genomes(MAGs)of Chloroflexota from these soils.A total of 11 MAGs were proposed as novel candidate species,including 3 novel candidate genera affiliated with the classes Ktedonobacteria,Limnocylindria,and Dormibacteria.Functional annotation reveals that many MAGs from Ktedonobacteria and Dormibacteria may have novel potential for carbon fixation through the Calvin-Benson-Bassham cycle.Additionally,many Chloroflexota MAGs harbored essential genes involved in enhancing soil phosphorus(P)availability.In Chloroflexota MAGs,the gene responsible for extracellular oxidation,dldH,rather than the intracellular oxidation gene arsO,was widespread for Sb(III)oxidation.Under heavy As and Sb contamination and nutrient limitation,Chloroflexota MAGs exhibited higher guanine-cytosine contents and smaller genome sizes.Moreover,MAGs derived from these conditions were enriched with a higher proportion of genes related to Sb oxidation,As/P transport,As reduction and methylation,as well as pathways involved in carbohydrate degradation and bioavailable nitrogen biosynthesis.These findings might be helpful for developing bioremediation strategy for Chloroflexota in As/Sb contaminated soils.
