The ocean serves as a repository for various types of artificial nanoparticles.Nanoplastics(NPs)and nano zinc oxide(nZnO),which are frequently employed in personal care products and food packaging materials,are likely...The ocean serves as a repository for various types of artificial nanoparticles.Nanoplastics(NPs)and nano zinc oxide(nZnO),which are frequently employed in personal care products and food packaging materials,are likely simultaneously released and eventually into the ocean with surface runoff.Therefore,their mutual influence and shared destiny in marine environment cannot be ignored.This study examined how nanomaterials interacted and transported through sea sand in various salinity conditions.Results showed that NPs remained dispersed in brine,while nZnO formed homoaggregates.In seawater of 35 practical salinity units(PSU),nZnO formed heteroaggregates with NPs,inhibiting NPs mobility and decreasing the recovered mass percentage(Meff)from 24.52%to 12.65%.In 3.5 PSU brackish water,nZnO did not significantly aggregate with NPs,and thus barely affected their mobility.However,NPs greatly enhanced nZnO transport with Meff increasing from 14.20%to 25.08%,attributed to the carrier effect of higher mobility NPs.Cotransport from brackishwater to seawater was simulated in salinity change experiments and revealed a critical salinity threshold of 10.4 PSU,below which the mobility of NPs was not affected by coexisting nZnO and above which nZnO strongly inhibited NP transport.This study highlights the importance of considering the mutual influence and shared destiny of artificial nanoparticles in the marine environment and how their interaction and cotransport are dependent on changes in seawater salinity.展开更多
Construction of crystalline homo/heteroaggregation at micro/nanometer level from organicπ-conjugated systems is of great importance because the controllable morphologies(i.e.,size,shape,and dimension)could provide di...Construction of crystalline homo/heteroaggregation at micro/nanometer level from organicπ-conjugated systems is of great importance because the controllable morphologies(i.e.,size,shape,and dimension)could provide diverse optoelectronic properties for different applications in the electrooptical devices.In this review,we summarize our recent progress in the self-assembly of micro/nanostructures of organicπ-conjugated molecules via the heteroaggregation and homoaggregation strategies.We also discuss various factors(i.e.,temperature,solvents,and surfactants)that affect the aggregation process through a surfactant-assisted reprecipitation method.Moreover,their physical properties and possible applications in electronics and biofields are illustrated.展开更多
基金supported by the National Natural Science Foundation of China (No.22176148)the Shanghai Rising-Star Program (No.23QB1406400)+1 种基金the Fundamental Research Funds for the Central Universities of Tongji University (No.2023-3-ZD-02)supported by the program INTPART (Plastic Pollution,No.275172)funded by the Research Council of Norway.
文摘The ocean serves as a repository for various types of artificial nanoparticles.Nanoplastics(NPs)and nano zinc oxide(nZnO),which are frequently employed in personal care products and food packaging materials,are likely simultaneously released and eventually into the ocean with surface runoff.Therefore,their mutual influence and shared destiny in marine environment cannot be ignored.This study examined how nanomaterials interacted and transported through sea sand in various salinity conditions.Results showed that NPs remained dispersed in brine,while nZnO formed homoaggregates.In seawater of 35 practical salinity units(PSU),nZnO formed heteroaggregates with NPs,inhibiting NPs mobility and decreasing the recovered mass percentage(Meff)from 24.52%to 12.65%.In 3.5 PSU brackish water,nZnO did not significantly aggregate with NPs,and thus barely affected their mobility.However,NPs greatly enhanced nZnO transport with Meff increasing from 14.20%to 25.08%,attributed to the carrier effect of higher mobility NPs.Cotransport from brackishwater to seawater was simulated in salinity change experiments and revealed a critical salinity threshold of 10.4 PSU,below which the mobility of NPs was not affected by coexisting nZnO and above which nZnO strongly inhibited NP transport.This study highlights the importance of considering the mutual influence and shared destiny of artificial nanoparticles in the marine environment and how their interaction and cotransport are dependent on changes in seawater salinity.
基金National Natural Science Foundation of China,Grant/Award Number:21672051Natural Science Foundation of Hebei Province for Distinguished Young Scholar,Grant/Award Number:B2017201072+4 种基金Natural Science Foundation of Hebei Province,Grant/Award Number:B2020201044KeyResearch Projects of Science andTechnology Project of Hebei Education Department,Grant/Award Number:ZD2020128talent training project of Hebei Province,Grant/Award Number:A201902006City University of Hongkong,111 Project,Grant/Award Number:D20015State Key Laboratory of Supramolecular Structure and Materials,Jilin University,Grant/Award Number:sklssm2020041。
文摘Construction of crystalline homo/heteroaggregation at micro/nanometer level from organicπ-conjugated systems is of great importance because the controllable morphologies(i.e.,size,shape,and dimension)could provide diverse optoelectronic properties for different applications in the electrooptical devices.In this review,we summarize our recent progress in the self-assembly of micro/nanostructures of organicπ-conjugated molecules via the heteroaggregation and homoaggregation strategies.We also discuss various factors(i.e.,temperature,solvents,and surfactants)that affect the aggregation process through a surfactant-assisted reprecipitation method.Moreover,their physical properties and possible applications in electronics and biofields are illustrated.
