Techniques for manipulating nanodroplets lie at the core of numerous miniaturized systems in chemical and biological research endeavors.In this study,we introduce a versatile methodology for calculating the acoustic v...Techniques for manipulating nanodroplets lie at the core of numerous miniaturized systems in chemical and biological research endeavors.In this study,we introduce a versatile methodology for calculating the acoustic vortex field,integrating hybrid wave equation principles with ray acoustics.This approach demonstrates remarkable consistency between simulated results and experimental observations.Importantly,both theoretical analysis and experimental validation confirm that particles whose diameters match the wavelength(Mie particles)can be effectively trapped within a focused acoustic vortex field,rotating in circular trajectories centered at the vortex center.This research significantly expands the scope of acoustic vortex manipulation for larger particles and introduces a novel implementation strategy with potential applications in targeted drug delivery for clinical adjuvant therapy.展开更多
Photocatalytic overall water splitting is a promising method for producing clean hydrogen energy,but faces challenges such as low light utilization efficiency and high charge carrier recombination rates.This study dem...Photocatalytic overall water splitting is a promising method for producing clean hydrogen energy,but faces challenges such as low light utilization efficiency and high charge carrier recombination rates.This study demonstrates that dielectric Mie resonance in TiO_(2)hollow nanoshells can enhance electric field intensity and increase light absorption through resonant energy transfer,compared to crushed TiO_(2)nanoparticles.The Mie resonance effect was confirmed through fluorescence spectra,photo-response current measurements,photocatalytic water splitting experiments,and Mie calculation.The incident electricfield amplitude was doubled in hollow nanoshells,allowing for increased light trapping.Additionally,the spatially separated Pt and RuO_(2)cocatalysts on the inner and outer surfaces facilitated the separation of photoinduced electrons and holes.Pt@TiO_(2)@RuO_(2)hollow nanoshells exhibited superior photocatalytic water splitting performance,with a stable H_(2)generation rate of 50.1μmol g^(−1)h^(−1)and O_(2)evolution rate of 25.1μmol g^(−1)h^(−1),outperforming other nanostructures such as TiO_(2),Pt@TiO_(2),and TiO_(2)@RuO_(2)hollow nanoshells.This study suggests that dielectric Mie resonance and spatially-separated cocatalysts offer a new approach to simultaneously enhance light absorption and charge carrier transfer in photocatalysis.展开更多
Mars is the terrestrial planet in the solar system that is closest to the Earth.Studying the atmospheric parameters of Mars and studying the evolutionary history of the Martian environment on this basis is helpful for...Mars is the terrestrial planet in the solar system that is closest to the Earth.Studying the atmospheric parameters of Mars and studying the evolutionary history of the Martian environment on this basis is helpful for people to discover signs of extraterrestrial life and to study the trend of climate change on Earth.Mie–Rayleigh scattering lidar is an important technology for detecting parameters from the surface to the middle and upper atmosphere.Because of the different aerosol distributions,Mie scattering and Rayleigh scattering have their own optimal detection ranges.Given the long period and high cost of any deep space exploration program,it is important to conduct sufficient feasibility studies and parameter simulations before the payload is launched.In this study,a parameterized lidar mathematical model and Earth’s atmospheric mode are used to compare with the measured signals of ground-based Mie–Rayleigh scattering lidar,and the correctness of the lidar mathematical model is verified.Using the model,we select the landing area of Tianwen-1 and substitute it into the Martian atmospheric mode,and then the Mie–Rayleigh lidar backscattering signal and the key parameters of the lidar system are systematically analyzed under the conditions of a clean Martian atmosphere and a global sandstorm.In addition,the optimal detection altitude ranges of Mie scattering and Rayleigh scattering on Mars under different atmospheric conditions are obtained,which provides a reference for the practical design and development of the subsequent lidar system for the Martian atmospheric environment.展开更多
基金Project supported by the National Key R&D Program of China(Grant No.2023YFE0201900)。
文摘Techniques for manipulating nanodroplets lie at the core of numerous miniaturized systems in chemical and biological research endeavors.In this study,we introduce a versatile methodology for calculating the acoustic vortex field,integrating hybrid wave equation principles with ray acoustics.This approach demonstrates remarkable consistency between simulated results and experimental observations.Importantly,both theoretical analysis and experimental validation confirm that particles whose diameters match the wavelength(Mie particles)can be effectively trapped within a focused acoustic vortex field,rotating in circular trajectories centered at the vortex center.This research significantly expands the scope of acoustic vortex manipulation for larger particles and introduces a novel implementation strategy with potential applications in targeted drug delivery for clinical adjuvant therapy.
基金supported by the National Natural Science Foundation of China(Nos.51702023,62274017)Natural Science Foundation of Jiangsu Province(No.BK20231224)China Postdoctoral Science Foundation(No.2022M711138).
文摘Photocatalytic overall water splitting is a promising method for producing clean hydrogen energy,but faces challenges such as low light utilization efficiency and high charge carrier recombination rates.This study demonstrates that dielectric Mie resonance in TiO_(2)hollow nanoshells can enhance electric field intensity and increase light absorption through resonant energy transfer,compared to crushed TiO_(2)nanoparticles.The Mie resonance effect was confirmed through fluorescence spectra,photo-response current measurements,photocatalytic water splitting experiments,and Mie calculation.The incident electricfield amplitude was doubled in hollow nanoshells,allowing for increased light trapping.Additionally,the spatially separated Pt and RuO_(2)cocatalysts on the inner and outer surfaces facilitated the separation of photoinduced electrons and holes.Pt@TiO_(2)@RuO_(2)hollow nanoshells exhibited superior photocatalytic water splitting performance,with a stable H_(2)generation rate of 50.1μmol g^(−1)h^(−1)and O_(2)evolution rate of 25.1μmol g^(−1)h^(−1),outperforming other nanostructures such as TiO_(2),Pt@TiO_(2),and TiO_(2)@RuO_(2)hollow nanoshells.This study suggests that dielectric Mie resonance and spatially-separated cocatalysts offer a new approach to simultaneously enhance light absorption and charge carrier transfer in photocatalysis.
基金financial support from the B-type Strategic Priority Program of the Chinese Academy of Sciences (Grant No. XDB41030000)the National Natural Science Foundation of China (Grant Nos. 42125402, 42188101, 42304165, and 42374182)+2 种基金the Key-Area Research and Development Program of Guangdong Province (Grant No. 2020B0303020001)the Shanghai Municipal Science and Technology Major Project (Grant No. 2019SHZDZX01)the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0300302)
文摘Mars is the terrestrial planet in the solar system that is closest to the Earth.Studying the atmospheric parameters of Mars and studying the evolutionary history of the Martian environment on this basis is helpful for people to discover signs of extraterrestrial life and to study the trend of climate change on Earth.Mie–Rayleigh scattering lidar is an important technology for detecting parameters from the surface to the middle and upper atmosphere.Because of the different aerosol distributions,Mie scattering and Rayleigh scattering have their own optimal detection ranges.Given the long period and high cost of any deep space exploration program,it is important to conduct sufficient feasibility studies and parameter simulations before the payload is launched.In this study,a parameterized lidar mathematical model and Earth’s atmospheric mode are used to compare with the measured signals of ground-based Mie–Rayleigh scattering lidar,and the correctness of the lidar mathematical model is verified.Using the model,we select the landing area of Tianwen-1 and substitute it into the Martian atmospheric mode,and then the Mie–Rayleigh lidar backscattering signal and the key parameters of the lidar system are systematically analyzed under the conditions of a clean Martian atmosphere and a global sandstorm.In addition,the optimal detection altitude ranges of Mie scattering and Rayleigh scattering on Mars under different atmospheric conditions are obtained,which provides a reference for the practical design and development of the subsequent lidar system for the Martian atmospheric environment.
