The properties of nanoscale gas bubbles at the solid/water interface have been investigated for more than 20 years. However, the stability of nanobubbles remains far from being understood. How to control the formation...The properties of nanoscale gas bubbles at the solid/water interface have been investigated for more than 20 years. However, the stability of nanobubbles remains far from being understood. How to control the formation of nanobubbles is the key issue for understanding their long lifetime. In this work, using molecular dynamics simulations we modify the substrate （graphene） with charge dipoles in which the local properties of the surface could be changed. Nanobubbles could be stabilized on the local hydrophobic area and modified area with the hydrophilic boundary where gas nuclei are deposited beforehand. Those results provide two methods to control the nucleation of gas nanobubbles and fix them on a target area.展开更多
This commentary underscores the importance and implications of the study“Biomolecular condensates with complex architectures via controlled nucleation,”led by Jan C.M.van Hest and Tuomas P.J.Knowles,published in Nat...This commentary underscores the importance and implications of the study“Biomolecular condensates with complex architectures via controlled nucleation,”led by Jan C.M.van Hest and Tuomas P.J.Knowles,published in Nature Chemical Engineering.The research team developed a novel system to investigate the structure of biological condensates using quaternized amylose,carboxymethylated amylose,and single-stranded DNA.They successfully created multiphase droplets with distinct dense phases and demonstrated that droplet architecture can be controlled through temperature and salt concentration adjustments.This study offers valuable insights into the formation and function of membraneless organelles in cells and suggests promising applications for designing biomimetic materials and therapeutic strategies.展开更多
Atomic force microscopy （AFM） and power-dependent micro-photoluminescence （μ-PL） spectroscopy are used to study the structure and exciton energy states in InAs quantum dots （QDs） grown on an In0.35Ga0.65As temp...Atomic force microscopy （AFM） and power-dependent micro-photoluminescence （μ-PL） spectroscopy are used to study the structure and exciton energy states in InAs quantum dots （QDs） grown on an In0.35Ga0.65As template on GaAs （311）B. The In0.35Ga0.65As template, consisting of a two-dimensionally modulated layer of closely packed connected cells, has a remarkable effect on the optical properties of the IhAs QDs. By comparing the emission spectra of the samples without and with InAs QDs and the work carried out by Gong et al. [J. Cryst. Growth 251 （2003） 150; Appl. Phys. Lett. 81 （2002） 3254] we conclude that the existence of the In0.35Ga0.65As template enhances the photo-absorption and therefore the exeiton emission from the QDs due to efficient exciton transfer from the template into the QDs. Furthermore, the PL emission from the QDs dearly reveals four discrete energy levels, S, P, D, and F with increasing excitation power.展开更多
基金Support by the National Natural Science Foundation of China under Grant Nos 11079050,11174372,11290165 and 11305252the Program of the Chinese Academy of Sciences under Grant Nos KJCX2-EW-W09 and KJZD-EW-M03
文摘The properties of nanoscale gas bubbles at the solid/water interface have been investigated for more than 20 years. However, the stability of nanobubbles remains far from being understood. How to control the formation of nanobubbles is the key issue for understanding their long lifetime. In this work, using molecular dynamics simulations we modify the substrate （graphene） with charge dipoles in which the local properties of the surface could be changed. Nanobubbles could be stabilized on the local hydrophobic area and modified area with the hydrophilic boundary where gas nuclei are deposited beforehand. Those results provide two methods to control the nucleation of gas nanobubbles and fix them on a target area.
基金supported by the National Key Research and Development Program of China(2020YFA0908200)and the National Natural Science Foundation of China(32271383).
文摘This commentary underscores the importance and implications of the study“Biomolecular condensates with complex architectures via controlled nucleation,”led by Jan C.M.van Hest and Tuomas P.J.Knowles,published in Nature Chemical Engineering.The research team developed a novel system to investigate the structure of biological condensates using quaternized amylose,carboxymethylated amylose,and single-stranded DNA.They successfully created multiphase droplets with distinct dense phases and demonstrated that droplet architecture can be controlled through temperature and salt concentration adjustments.This study offers valuable insights into the formation and function of membraneless organelles in cells and suggests promising applications for designing biomimetic materials and therapeutic strategies.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10374018, 10321003, and 90401015, the Scientific Committee of Shanghai under Grant No 03DJ14001, and the Special Funds for Major State Basic Research Project of China under Grant No 2004CB619004.
文摘Atomic force microscopy （AFM） and power-dependent micro-photoluminescence （μ-PL） spectroscopy are used to study the structure and exciton energy states in InAs quantum dots （QDs） grown on an In0.35Ga0.65As template on GaAs （311）B. The In0.35Ga0.65As template, consisting of a two-dimensionally modulated layer of closely packed connected cells, has a remarkable effect on the optical properties of the IhAs QDs. By comparing the emission spectra of the samples without and with InAs QDs and the work carried out by Gong et al. [J. Cryst. Growth 251 （2003） 150; Appl. Phys. Lett. 81 （2002） 3254] we conclude that the existence of the In0.35Ga0.65As template enhances the photo-absorption and therefore the exeiton emission from the QDs due to efficient exciton transfer from the template into the QDs. Furthermore, the PL emission from the QDs dearly reveals four discrete energy levels, S, P, D, and F with increasing excitation power.
