The anionic products from the reactions between metal（M=Ag, Au, Pd, Pt, Pb and Bi） vapour produced by laser ablation and hexafluorobenzene seeded in carrier gas（Ar） were studied by means of a homemade reflectron t...The anionic products from the reactions between metal（M=Ag, Au, Pd, Pt, Pb and Bi） vapour produced by laser ablation and hexafluorobenzene seeded in carrier gas（Ar） were studied by means of a homemade reflectron time-of-flight mass spectrometry（RTOF-MS）. Experimental results show that the dominant products were [MmC6F6]^- complexes for the reactions ofAg, Au, Pd and Pt with C6F6, while the dominant products were [MmC6F5]^- complexes for the reactions of Pb and Bi with C6F6. The formation mechanisms of the products, including the adsorption of metal cluster anions on hexafluorobenzene and the C--F cleavage induced by metal cluster anions, were discussed.展开更多
Computational spectrometers are at the forefront of spectroscopy,promising portable,on-chip,or in-situ spectrum analysis through the integration of advanced computational techniques into optical systems.However,existi...Computational spectrometers are at the forefront of spectroscopy,promising portable,on-chip,or in-situ spectrum analysis through the integration of advanced computational techniques into optical systems.However,existing computational spectrometer systems have yet to fully exploit optical properties due to imperfect spectral responses,resulting in increased system complexity and compromised performance in resolution,bandwidth,and footprint.In this study,we introduce optical chaos into spectrum manipulation via cavity deformation,leveraging high spatial and spectral complexities to address this challenge.By utilizing a single chaotic cavity,we achieve high diversity in spectra,facilitating channel decorrelation of 10 pm and ensuring optimal reconstruction over 100 nm within an ultra-compact footprint of 20×22μm^(2)as well as an ultra-low power consumption of 16.5 mW.Our approach not only enables state-of-the-art on-chip spectrometer performance in resolution-bandwidth-footprint metric,but also has the potential to revolutionize the entire computational spectrometer ecosystem.展开更多
Ⅰ. INTRODUCTION It is known that high-valent manganese complexes are crucial for oxygen evolution in photosynthetic processes and can selectively oxidize hydrocarbons under mild conditions. Thus, recently chemists ar...Ⅰ. INTRODUCTION It is known that high-valent manganese complexes are crucial for oxygen evolution in photosynthetic processes and can selectively oxidize hydrocarbons under mild conditions. Thus, recently chemists are very much interested in synthesis of high-valent展开更多
Miniature computational spectrometers,distinguished by their compact size and light weight,have shown great promise for on-chip and portable applications in the fields of healthcare,environmental monitoring,food safet...Miniature computational spectrometers,distinguished by their compact size and light weight,have shown great promise for on-chip and portable applications in the fields of healthcare,environmental monitoring,food safety,and industrial process monitoring.However,the common miniaturization strategies predominantly rely on advanced micronano fabrication and complex material engineering,limiting their scalability and affordability.Here,we present a broadband miniaturized computational spectrometer(ElastoSpec)enabled by the photoelastic effect,featuring easy-to-prepare and configurable implementation with adaptive modulation units selection for optimized spectral reconstruction.A single computational photoelastic spectral filter,with only two polarizers and a plastic sheet,is designed to be integrated onto the top of a CMOS sensor for snapshot spectral acquisition.The distinct spectral modulation units are directly generated from different spatial locations of the filter,due to the photoelastic-induced chromatic polarization effect of the plastic sheet.We experimentally demonstrate that ElastoSpec offers excellent reconstruction accuracy for the measurement of both simple narrowband and complex spectra.ElastoSpec exhibits a spectral resolution of 2 nm and achieves a full width at half maximum(FWHM)error of approximately 0.2 nm for monochromatic inputs.It also maintains a mean squared error(MSE)value on the order of 10-3 with only 10 spectral modulation units.Furthermore,we develop an adaptive strategy for selecting modulation units to enhance spectrum sensing performance through the flexibility in optimizing the modulation effectiveness and the number of spectral modulation units.This work avoids the need for complex micro-nano fabrication and specialized materials for the design of computational spectrometers,thus paving the way for the development of simple,cost-effective,and scalable solutions for on-chip and portable spectral sensing devices.展开更多
基金Supported by the National Natural Science Foundation of China(No.20433080).
文摘The anionic products from the reactions between metal（M=Ag, Au, Pd, Pt, Pb and Bi） vapour produced by laser ablation and hexafluorobenzene seeded in carrier gas（Ar） were studied by means of a homemade reflectron time-of-flight mass spectrometry（RTOF-MS）. Experimental results show that the dominant products were [MmC6F6]^- complexes for the reactions ofAg, Au, Pd and Pt with C6F6, while the dominant products were [MmC6F5]^- complexes for the reactions of Pb and Bi with C6F6. The formation mechanisms of the products, including the adsorption of metal cluster anions on hexafluorobenzene and the C--F cleavage induced by metal cluster anions, were discussed.
基金financially supported by the National Key R&D Program of China(2023YFB2804702)the Natural Science Foundation of China(NSFC)(62175151,62341508)Shanghai Municipal Science and Technology Major Project.We also thank the Center for Advanced Electronic Materials and Devices(AEMD)of Shanghai Jiao Tong University(SJTU)and United Microelectronics Center(CUMEC)for fabrication support.
文摘Computational spectrometers are at the forefront of spectroscopy,promising portable,on-chip,or in-situ spectrum analysis through the integration of advanced computational techniques into optical systems.However,existing computational spectrometer systems have yet to fully exploit optical properties due to imperfect spectral responses,resulting in increased system complexity and compromised performance in resolution,bandwidth,and footprint.In this study,we introduce optical chaos into spectrum manipulation via cavity deformation,leveraging high spatial and spectral complexities to address this challenge.By utilizing a single chaotic cavity,we achieve high diversity in spectra,facilitating channel decorrelation of 10 pm and ensuring optimal reconstruction over 100 nm within an ultra-compact footprint of 20×22μm^(2)as well as an ultra-low power consumption of 16.5 mW.Our approach not only enables state-of-the-art on-chip spectrometer performance in resolution-bandwidth-footprint metric,but also has the potential to revolutionize the entire computational spectrometer ecosystem.
文摘Ⅰ. INTRODUCTION It is known that high-valent manganese complexes are crucial for oxygen evolution in photosynthetic processes and can selectively oxidize hydrocarbons under mild conditions. Thus, recently chemists are very much interested in synthesis of high-valent
基金National Natural Science Foundation of China(U23A20481,62503032,62275010,62573029)Fundamental Research Funds for the Central Universities(KG16-3549-01)+1 种基金Australian Research Council(DP220101417)Discovery Early Career Researcher Awards(DE250100406)。
文摘Miniature computational spectrometers,distinguished by their compact size and light weight,have shown great promise for on-chip and portable applications in the fields of healthcare,environmental monitoring,food safety,and industrial process monitoring.However,the common miniaturization strategies predominantly rely on advanced micronano fabrication and complex material engineering,limiting their scalability and affordability.Here,we present a broadband miniaturized computational spectrometer(ElastoSpec)enabled by the photoelastic effect,featuring easy-to-prepare and configurable implementation with adaptive modulation units selection for optimized spectral reconstruction.A single computational photoelastic spectral filter,with only two polarizers and a plastic sheet,is designed to be integrated onto the top of a CMOS sensor for snapshot spectral acquisition.The distinct spectral modulation units are directly generated from different spatial locations of the filter,due to the photoelastic-induced chromatic polarization effect of the plastic sheet.We experimentally demonstrate that ElastoSpec offers excellent reconstruction accuracy for the measurement of both simple narrowband and complex spectra.ElastoSpec exhibits a spectral resolution of 2 nm and achieves a full width at half maximum(FWHM)error of approximately 0.2 nm for monochromatic inputs.It also maintains a mean squared error(MSE)value on the order of 10-3 with only 10 spectral modulation units.Furthermore,we develop an adaptive strategy for selecting modulation units to enhance spectrum sensing performance through the flexibility in optimizing the modulation effectiveness and the number of spectral modulation units.This work avoids the need for complex micro-nano fabrication and specialized materials for the design of computational spectrometers,thus paving the way for the development of simple,cost-effective,and scalable solutions for on-chip and portable spectral sensing devices.
