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
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.
