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Infrared fluorescence imaging of infarcted hearts with A@S nanodots

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nano Research 2019年第4期12卷 749-757页

作者： Dirk H. Ortgies Angel Luis Garcia-Villalon Miriam Granado Sara Amor emma Martin Rodriguez Harrisson DA Santos Jingke Yao Jorge Rubio-Retama Daniel Jaque nanobiology Group Instituto Ramon y Cajal de Investigacion Sanitaria IRYCIS Ctra. Colmenar km. 9.100 Madrid 28034 Spain Fluorescence Imaging Group Departamento de Fisica de Materiales - Facultad de Ciencias Universidad Autonoma de Madrid C/ Francisco Tomas y Valiente 7 Madrid 28049 Spain Fluorescence Imaging Group Departamento de Fisiologia - Facultad de Medicina Avda. Arzobispo Morcillo 2 Universidad Autonoma de Madrid Madrid 28029 Spain Fluorescence Imaging Group Departamento de Fisica Aplicada - Facultad de Ciencias Universidad Autonoma de Madrid C/ Francisco Tomas y Valiente 7 Madrid 28049 Spain grupo de nano-fotonica e imagens Instituto de Fisica Universidade Federal de Alagoas Maceio-AL 57072-900 Brazil departamento de Quimica Fisica en Ciencias Farmaceuticas Facultad de Farmacia Plaza de Ramon y Cajal s/n Universidad Complutense de Madrid Madrid 28040 Spain

Ag2S nano dots have already bee n dem onstrated as promisi ng n ear-i nfrared (NIR-II, 1.0-1.45 pm) emitting nan oprobes with low toxicity, high penetration and high resolution for in vivo imaging of, for example, tumors and vasculature. In this work, we have systematically investigated the pote ntial applicati on of function alized Ag2S nano dots for accurate imaging of damaged myocardium tissues after a myocardial in farction in duced by either partial or global ischemia. Ag2S nano dots surface-function alized with the an giote nsin II peptide (ATI I) have show n over 10-fold enhanced binding efficiency to damaged tissues than non-specifically (PeG) functionalized Ag2S nanodots due to their interaction with the upregulated angiotensin II receptor type I (AT1R). It is demonstrated how the NIR-II images generated by ATII-functionalized Ag2S nanodots contain valuable information about the location and extension of damaged tissue in the myocardium allowing for a proper identification of the occluded artery as well as an in direct evaluati on of the damage level. The pote ntial applicati on of Ag2S nano dots in the n ear future for in vivo imaging of myocardial infarction was also corroborated by performing proof of concept whole body imaging experiments.

关键词： infrared imaging myocardial infarct Ag2S nanodots biological windows Langendorff heart

Light tuning CO/H_(2)composition on Ag:Unraveling CO_(2)mass transfer and electron-phonon coupling in plasmon-enhanced electrocatalysis

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nano Research 2025年第1期18卷 173-185页

作者： Rui Lin Dong Fan Luca MBerger Thomas Possmayer Yu Zhou Jiexin Zhu Xingbao Chen Wen Luo Lars Allmendinger Andreas Tittl Leonardo de Souza Menezes Guillaume Maurin Shihe Yang and Stefan AMaier nanoinstitute Munich Faculty of PhysicsLudwig-Maximilians-Universität München80539 MunichGermany Institut Charles Gerhardt Montpellier UMR 5253 CNRS eNSCM UniversitéMontpellierPlace E.Bataillon34090 MontpellierFrance Guangdong Provincial Key Lab of nano-Micro Material Research School of Advanced MaterialsPeking University Shenzhen Graduate SchoolShenzhen 518055China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Faculty of Chemistry and Pharmacy Ludwig-Maximilians-Universität München81377 MunichGermany departamento de Física Universidade Federal de Pernambuco50670-901 Recife-PEBrazil School of Physics and Astronomy Monash University Clayton CampusMelbourneVictoria 3800Australia department of Physics Imperial College LondonSW72AZ LondonUK

Plasmon-enhanced electrocatalysis(PeeC)is an emerging approach to mitigate CO_(2)*** mechanisms behind CO_(2)adsorption and reduction at the catalyst-electrolyte interface in PeeC still need to be further ***,we employ a well-defined Ag nanostructure to elucidate these pivotal *** shining light with wavelengths of 625,525,405 nm on Ag,an adjustable CO/H_(2)ratio from 35 to 1 can be *** reaction pathway changing under plasmonic excitation does not originate from the lowered CO_(2)mass transfer in the vicinity of Ag,as the electrochemical quartz crystal microbalance results unravel that a slightly elevated temperature in bulk electrolyte caused by light irradiation cannot weaken the CO_(2)adsorption at the Ag catalyst-electrolyte *** calculations reveal that optical excitation towards shorter wavelengths leads to a progressive lowered energy barrier for H_(2)formation together with an enhanced energy barrier for^(*)COOH *** thermodynamically suppressed,CO_(2)reduction can still be improved kinetically by optimizing the excitation wavelength and intensity,being accompanied with the enhanced *** absorption spectroscopy results further correlate the higher photocurrent with a prolonged electron-phonon coupling time,verifying that the improvement of CO_(2)reduction kinetics in PeeC can be realized by hot electron harnessing.

关键词： plasmonic catalysis photoelectrochemical CO_(2)reduction CO/H_(2)ratio hot electron generation electronphonon coupling thermal effect

Selective suspension of single layer graphene mechanochemically exfoliated from carbon nanofibres

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nano Research 2014年第7期7卷 963-972页

作者： Antonio esau del Rio-CastilloI Cesar Merino enrique Diez-Barra ester Vazquez departamento de Quimica Orgdnica Facultad de Ciencias y Tecnologfas Qufmicas-IRICA Universidad de Castilla-La Mancha 13071 Ciudad Real Spain grupo Antolin Ingenieria S.A. Burgos E09007 Spain

This paper presents the first report of the successful ball-milling exfoliation of graphitic filaments （GANF~ carbon nanofibres） into single layer graphene. The addition of small amounts of solvent during the milling process makes it possible to enhance the intercalation of the exfoliating agent （melamine） between the graphene layers, thus promoting exceptional exfoliation. Advantage has also been taken of the fact that the Hansen solubility parameters of graphene are different from those of carbon fibres, which allows single and few-layer graphene to be suspended in a particular solvent, thus discriminating them from poorly exfoliated carbon nanofibres.

关键词： carbon fibre graphene ball-milling exfoliation Hansen solubilityparameters

Silicon-based metal-organic frameworks(SiMOFs)for immunogenic cell death in cancer therapy

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nano Research 2025年第1期18卷 628-641页

作者： Min Han Zishan Chen Shiying Zhou Zunde Liao Xiangting Yi Yao He Yiling Zhong Kam W.Leong College of Pharmacy State Key Laboratory of Bioactive Molecules and Druggability AssessmentJinan UniversityGuangzhou 511443China department of Biomedical engineering Columbia UniversityNew YorkNY 10027USA Institute of Functional nano and Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China

Silicon-based nanomaterials,known for their unique properties and favorable biocompatibility,significantly impact sectors like energy,electronics,and ***,metalorganic frameworks(MOFs)have emerged as promising candidates for biomedicine,characterized by adjustable chemical composition,high porosity,and ***,the combination of silicon with MOFs to create silicon-based MOF nanostructures(SiMOFs)remains ***,we establish a diverse library of SiMOFs with various nanostructures,including flower-like,capsule-like,hexagonal snowflake-like,and necklace-like morphologies via microwave-assisted *** SiMOFs,with their spacious interiors,are ideal for drug *** are used to load drugs and create drug-loaded SiMOFs(e.g.,SiFeO).SiFeO exhibits excellent photothermal effects and high reactive oxygen species(ROS)generation capacity,enabling synergistic treatments involving chemochemodynamic-photothermal *** approach efficiently triggers immunogenic cell death(ICD)and demonstrates excellent antitumor efficacy in *** staining reveals that the synergistic therapy can modulate the tumor microenvironment(TMe)by reducing M2-phenotype macrophages,increasing the activation of antigen-presenting cells(APCs),enhancing the infiltration of CD4^(+)and CD8^(+)T cells,elevating Granzyme B production,and decreasing the presence of immunosuppressive regulatory T cells(Tregs).Consequently,drug-loaded SiMOFs-mediated combination therapy effectively reverses the immunosuppressive TMe and activates robust antitumor immune responses by inducing ICD in tumor cells,ultimately achieving superior anticancer efficacy.

关键词： silicon-based nanomaterials nanocarriers immunogenic cell death antitumor immune responses

Time reversal of a discrete system coupled to a continuum based on non-Hermitian flip

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Science Bulletin 2017年第12期62卷 869-874页

作者： Stefano Longhi Dipartimento di Fisica Politecnico di Milano and Istituto di Fotonica e Nanotecnologie del Consiglio Nazionale delle RicerchePiazza L.da Vinci 321-20133 MilanoItaly

Time reversal in quantum or classical systems described by an Hermitian Hamiltonian is a physically allowed process, which requires in principle inverting the sign of the Hamiltonian. Here we consider the problem of time reversal of a subsystem of discrete states coupled to an external environment characterized by a continuum of states, into which they generally decay. It is shown that, by flipping the discrete-continuum coupling from an Hermitian to a non-Hermitian interaction, thus resulting in a non unitary dynamics, time reversal of the subsystem of discrete states can be achieved, while the continuum of states is not reversed. exact time reversal requires frequency degeneracy of the discrete states,or large frequency mismatch among the discrete states as compared to the strength of indirect coupling mediated by the continuum. Interestingly, periodic and frequent switch of the discrete-continuum coupling results in a frozen dynamics of the subsystem of discrete states.

关键词： Non-Hermitian dynamicsTime reversalLoschmidt echo

Fourier-Limited Attosecond Pulse from High Harmonic GenerationAssistedbyUlitrafast MagneticFields

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Ultrafast Science 2023年第5期3卷 51-59页

作者： Rodrigo Martin-Hernandez Hongtao Hu Andrius Baltuska Luis Plaja Carlos Hernandez-Garcia'I grupo de Investigacion en Aplicaciones del Lasery fotonica Departamento de Fisica AplicadaUniversidad de SalamancaE-37008 SalamancaSpain Photonics Institute Technische Universitat WienA-1040 ViennaAustria

One of the main constraints for reducing the temporal duration of attosecond pulses is the attochirp inherent to the process of high-order harmonic generation(HHG).Though the attochirp can be compensated in the extreme-ultraviolet using dispersive materials,this is unfeasible toward x-rays,where the shortest attosecond or even sub-attosecond pulses could be *** theoretically demonstrate that HHG driven by a circularly polarized infrared pulse while assisted by an strong oscillating ultrafast intense magnetic field enables the generation of few-cycle Fourier-limited few attosecond *** such a novel scenario,the magnetic field transversally confines the ionized electron during the HHG process,analogously to a nanowire *** the electron is ionized,the transverse electron dynamics is excited by the magnetic field,acting as a high-energy reservoir to be released in the form of phase-locked spectrally wide high-frequency harmonic radiation during the electron recollision with the parent *** addition,the transverse breathing dynamics of the electron wavepacket,introduced by the magnetic trapping,strongly modulates the recollision efficiency of the electronic trajectories,thus the attosecond pulse *** aftermath is the possibility of producing high-frequency(hundreds of eV)attosecond isolated few-cycle pulses,almost Fourier *** isolated intense magnetic fields considered in our simulations,of tens of kT,can be produced in finite spatial volumes considering structured beams or stationary configurations of counter-propagating state-of-the-art multi-terawatt/petawatt lasers.

关键词： harmonic trapping intense

Periodic oscillation of quantum diffusion in coupled one-dimensional systems

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Science China(Physics,Mechanics & Astronomy) 2022年第4期65卷 95-103页

作者： JinYi Jiang YanYan Lu Chao Wang Rémy Mosseri JianXin Zhong Hunan Key Laboratory of Micro-nano energy Materials and devices School of Physics and OptoelectronicsXiangtan UniversityXiangtan 411105China Laboratoire de Physique Théorique de la Matière Condensée Sorbonne UniversitéCentre National de la Recherche ScientifiqueParis F-75005France

We analytically show that quantum diffusion in the coupled system composed of two identical chains exhibits a well-defined periodic oscillation in both transverse and longitudinal directions with a frequency determined by the interchain hopping strength, no matter whether the chains are periodic or non-periodic. We illustrate the result through numerical work on the coupled periodic chains and the quasiperiodic Aubry-Andre-Harper(AAH) chains with various modulations of onsite potentials supporting extended, critical, and localized states. We further numerically show that quantum diffusion in the coupled chains of different degrees of disorder W exhibits an exponential decay oscillation similar to the behavior of an underdamped harmonic oscillator, with a decay time inversely proportional to the square of W and a slight frequency change proportional to the square of W. Moreover, quantum diffusions in the coupled systems composed of two different chains are numerically studied, including periodic/disordered chains, periodic/AAH chains, and two different AAH chains, which exhibit the same behavior of underdamped periodic oscillation if the onsite potential difference between two chains is smaller than the interchain hoping *** of this universal periodic oscillation is a result of spectral splitting of the iso-spectra of two chains determined by interchain hopping, independent of system size, boundary condition, and intrachain onsite potentials. Because the oscillation frequency and spreading distance of wavepacket can be tuned separately by interchain hopping and intrachain potentials, the periodic oscillation of quantum diffusion in coupled chains is expected to find applications in control of quantum states and in designing nanoscale quantum devices.

关键词： quantum diffusion periodic oscillation localization coupled systems

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Planarized THz quantum cascade lasers for broadband coherent photonics

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Light(Science & Applications) 2022年第12期11卷 3098-3108页

作者： Urban Senica Andres Forrer Tudor Olariu Paolo Micheletti Sara Cibella Guido Torrioli Mattias Beck Jerome Faist Giacomo Scalari Quantum Optoelectronics Group Institute of Quantum ElectronicsETH Zurich8093 ZürichSwitzerland Istituto di fotonica e nanotecnologie CNRVia del Fosso del Cavaliere 10000133 RomeItaly

Recently,there has been a growing interest in integrated THz photonics for various applications in communications,spectroscopy and *** present a new integrated photonic platform based on active and passive elements integrated in a double-metal,high-confinement waveguide layout planarized with a low-loss *** extended top metallization keeps waveguide losses low while improving dispersion,thermal and RF properties,as it enables to decouple the design of THz and microwave ***-running on-chip quantum cascade laser combs spanning 800 GHz,harmonic states with over 1.1 THz bandwidth and RF-injected broadband incoherent states spanning over nearly 1.6 THz are observed using a homogeneous quantum-cascade active *** a strong external RF drive,actively mode-locked pulses as short as 4.4 ps can be produced,as measured by *** demonstrate as well passive waveguides with low insertion loss,enabling the tuning of the laser cavity boundary conditions and the cointegration of active and passive elements on the same THz photonic chip.

关键词： waveguide passive tuning

A comprehensive review of recent progress on enhancement-modeβ-Ga_(2)O_(3)FeTs:Growth,devices and properties

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Journal of Semiconductors 2023年第6期44卷 7-23页

作者： Botong Li Xiaodong Zhang Li Zhang Yongjian Ma Wenbo Tang Tiwei Chen Yu Hu Xin Zhou Chunxu Bian Chunhong Zeng Tao Ju Zhongming Zeng Baoshun Zhang School of nano Technology and nano Bionics University of Science and Technology of ChinaHefei 230026China nano Fabrication Facility Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

Power electronic devices are of great importance in modern *** decades of development,Si power devices have approached their material limits with only incremental improvements and large conversion *** the demand for electronic components with high efficiency dramatically increasing,new materials are needed for power device *** gallium oxide,an ultra-wide bandgap semiconductor,has been considered as a promising candidate,and variousβ-Ga_(2)O_(3)power devices with high breakdown voltages have been ***,the realization of enhancement-mode(e-mode)β-Ga_(2)O_(3)field-effect transistors(FeTs)is still challenging,which is a critical problem for a myriad of power electronic ***,researchers have made some progress on e-modeβ-Ga_(2)O_(3)FeTs via various methods,and several novel structures have been *** article gives a review of the material growth,devices and properties of these e-modeβ-Ga_(2)O_(3)*** key challenges and future directions in e-modeβ-Ga_(2)O_(3)FeTs are also discussed.

关键词： enhancement mode FeTs β-Ga_(2)O_(3)