Article
Chemistry, Analytical
Celia Lhoste, Margherita Bazzoni, Justine Bonnet, Aurelie Bernard, Francois-Xavier Felpin, Patrick Giraudeau, Jean-Nicolas Dumez
Summary: In this study, ultrafast 2D NMR schemes were developed to acquire full spectral width 2D NMR spectra from continuously flowing samples in a short time. By using an interleaved acquisition strategy and an optimized solvent suppression strategy, it was possible to monitor chemical reactions online at high time resolution.
Article
Computer Science, Information Systems
Wenxue Cui, Shaohui Liu, Feng Jiang, Debin Zhao
Summary: In this paper, a novel image CS framework using non-local neural network (NL-CSNet) is proposed to improve the reconstruction quality. Two non-local subnetworks are constructed for utilizing non-local self-similarity priors in the measurement domain and the multi-scale feature domain respectively. A novel loss function is developed to enhance the coupling between the non-local representations, enabling an end-to-end training of NL-CSNet. Extensive experiments show that NL-CSNet outperforms existing state-of-the-art CS methods while maintaining fast computational speed.
IEEE TRANSACTIONS ON MULTIMEDIA
(2023)
Article
Chemistry, Analytical
Gerardo Gamez, Yue She, Paola Rivera, Songyue Shi, Kevin Finch
Summary: A single-pixel spectral imaging system based on compressed sensing image sampling was developed and optimized for coupling with glow discharge optical emission spectroscopy elemental mapping. The system achieved high spatial fidelity and fast measurement times by using specific matrix density and compression factor. Through optimizing the sparsifying basis and reconstruction algorithm, the accuracy of background equivalent concentration was improved. The system was successfully demonstrated in the elemental mapping of a flexible, etched-copper circuit board.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Chemistry, Analytical
Celia Lhoste, Margherita Bazzoni, Justine Bonnet, Aurelie Bernard, Francois-Xavier Felpin, Patrick Giraudeau, Jean-Nicolas Dumez
Summary: This article presents a method for rapid acquisition of broadband homonuclear 2D NMR spectra from continuously flowing samples. The use of interleaved acquisition and optimized solvent suppression allows for obtaining full spectra width in a short period of time. This development is important for online monitoring with high time resolution using flow 2D NMR.
Article
Chemistry, Multidisciplinary
Mark F. Nueesch, Milos T. Ivanovic, Jean-Benoit Claude, Daniel Nettels, Robert B. Best, Jerome Wenger, Benjamin Schuler
Summary: The use of nanophotonic fluorescence enhancement in zero-mode waveguides dramatically improves time resolution and reduces data acquisition times, enabling measurement of previously inaccessible low-nanosecond dynamics in biomolecules. This approach allows for better detection of biomolecular dynamics and achieves highly consistent results with all-atom molecular dynamics simulations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Bo Zhang, Di Xiao, Ying Li, Lei Yang
Summary: In this letter, a 2D compressed sensing (2DCS) scheme using nonlocal low-rank prior (NLP) reconstruction is proposed. By applying scrambling encryption and an iterative singular value thresholding (ISVT) algorithm, the proposed method outperforms previous CS-based methods in terms of R-D performance.
IEEE SIGNAL PROCESSING LETTERS
(2022)
Review
Chemistry, Physical
Celia Lhoste, Benjamin Lorandel, Clement Praud, Achille Marchand, Rituraj Mishra, Arnab Dey, Aurelie Bernard, Jean-Nicolas Dumez, Patrick Giraudeau
Summary: 2D NMR is widely used in various fields and has shown great potential for the study of complex biochemical or chemical mixtures. Ultrafast 2D NMR is a versatile approach that allows for the resolution of overlapped peaks in 1D spectra and provides both structural and quantitative information. It has undergone significant methodological developments and has become an efficient analytical tool with numerous applications in mixture analysis.
PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY
(2022)
Review
Biochemistry & Molecular Biology
T. Reid Alderson, Lewis E. Kay
Summary: The article demonstrates the importance of nuclear magnetic resonance (NMR) spectroscopy in studying the dynamic structures of biomolecules, including its wide range of applications in revealing biomolecular motions, functional dynamics in large molecular machines, transient conformations implicated in disease onset, and weak interactions involved in liquid-liquid phase separation.
Article
Computer Science, Information Systems
Bo Zhang, Di Xiao, Yong Xiang
Summary: This paper proposes a 2DCS-based ETC scheme for encrypting images with nonlinear operations, compressing them with 2DCS, and implementing gray mapping to enhance performance. Additionally, a 2DPG-ED algorithm is introduced for original image reconstruction, achieving high security and low computational complexity with better robustness compared to previous CS-based ETC methods.
IEEE TRANSACTIONS ON MULTIMEDIA
(2021)
Article
Multidisciplinary Sciences
Jolijn Onvlee, Sebastian Trippel, Jochen Kuepper
Summary: Protein-solvent interactions can be studied using hydrogen-bonded chromophore-solvent clusters. This study focuses on the ultrafast dynamics following UV-light-induced electronic excitation of the chromophores in a biomolecular system. By using the electrostatic deflector in combination with pump-probe velocity-map-imaging experiments, the authors reveal intimate details of the UV-induced dynamics and determine the time-dependent appearance of different reaction products.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Pengpeng Ding, Yunhua Yao, Dalong Qi, Chengshuai Yang, Fengyan Cao, Yilin He, Jiali Yao, Chengzhi Jin, Zhengqi Huang, Li Deng, Lianzhong Deng, Tianqing Jia, Jinyang Liang, Zhenrong Sun, Shian Zhang
Summary: The article introduces a new ultrafast optical imaging technique, SV-CUP, which can simultaneously capture the spatial-temporal-spectral 5D information of dynamic scenes with excellent performance. Through experiments, the spectrally resolved photoluminescent dynamics of CdSe quantum dots coated on a 3D mannequin were successfully measured to demonstrate the superior performance of SV-CUP in 5D imaging.
ADVANCED PHOTONICS
(2021)
Article
Chemistry, Multidisciplinary
Anna J. Parker, Arnab Dey, Mohammad Usman Qureshi, Jakob M. Steiner, John W. Blanchard, Jochen Scheuer, Nikolas Tomek, Stephan Knecht, Felix Josten, Christoph Mueller, Patrick Hautle, Ilai Schwartz, Patrick Giraudeau, Tim R. Eichhorn, Jean-Nicolas Dumez
Summary: The HYPNOESYS method, relying on the dissolution of optically polarized crystals, enhances the sensitivity of NMR spectroscopy in the solution state. This study demonstrates the acquisition of 2D NMR spectra from HYPNOESYS-polarized samples using single-scan methods, paving the way for a sensitive, information-rich, and affordable analytical technique.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Analytical
Clement Praud, Victor Ribay, Arnab Dey, Benoit Charrier, Joris Mandral, Jonathan Farjon, Jean-Nicolas Dumez, Patrick Giraudeau
Summary: Hyperpolarized 13C NMR based on dissolution dynamic nuclear polarization technology can provide rich, sensitive and repeatable NMR fingerprints of complex mixtures at natural abundance. Ultrafast 2D NMR spectroscopy allows the recording of heteronuclear 2D maps of d-DNP hyperpolarized samples and provides correlation peaks between carbon and proton through long-range scalar couplings. The optimized UF long-range HETCOR pulse sequence shows good repeatability, linearity and limits of quantification for metabolic mixtures in two different dissolution solvents. It is a useful analytical tool for assigning and integrating metabolite signals in hyperpolarized complex mixtures.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Multidisciplinary
Erika Colin-Ulloa, Andrew Fitzgerald, Kiana Montazeri, Javery Mann, Varun Natu, Ken Ngo, Joshua Uzarski, Michel W. Barsoum, Lyubov V. Titova
Summary: 2D MXenes have diverse and tunable optical properties due to interactions between free carriers, interband transitions, and plasmon resonances. The study investigates the photoexcitation and dynamics in three different MXene members using pump-probe techniques. The results reveal pronounced plasmonic effects and slow cooling in MXenes, providing insights for their potential applications in solar energy conversion, plasmonic devices, and photothermal therapy.
ADVANCED MATERIALS
(2023)
Article
Computer Science, Information Systems
Jun Wang
Summary: In this paper, a wonderful triangle is introduced to explore the concrete metric relationship between llxll1/llxll and llxll0. Based on the analysis of the iterative soft-thresholding operator, the angle of the triangle corresponding to the side llxll. - llxll1/llxll0 is studied, demonstrating the meaningfulness of signal sparsity within a certain exact interval.
INFORMATION SCIENCES
(2022)