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Urea-assisted morphological engineering of MFI nanosheets with tunable b-thickness

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Nano Research 2023年第10期16卷 12196-12206页

作者： Qiudi Yue Chaowei Liu Hongjuan Zhao Honghai Liu Pierre Ruterana Jiaqi Zhao Zhengxing Qin Svetlana Mintova laboratoire Catalyse et Spectrochimie ENSICAENUNICAENCNRSCaen 14050France Petrochemical Research Institute PetroChina Company LimitedBeijing 100195China Centre de Recherche sur les Ions les Matériaux et la PhotoniqueCIMAP-ENSICAENCNRS UMR 6252Caen 14050France State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China

Engineering of crystal morphology affects the catalytic and adsorption properties of zeolitic *** the anisotropic diffusion of molecules derived from its topological features,MFI zeolite nanosheets with short b-axis thickness are highly desired materials to reduce diffusion ***,the design and development of eco-friendly synthesis protocols with reasonable cost and high efficiency remain ***,we reported a systematic study on the synthesis of MFI nanosheets using urea as an *** silicalite-1 and ZSM-5 zeolites(MFI type framework structure)with controllable b-thicknesses ranging from 50–200 nm were achieved by optimizing the synthetic parameters including water content,urea and SDA *** concentration of hydroxide anions was found to dominate the crystallization kinetics compared with the counterpart tetrapropylammonium cations(TPA^(+)).To facilitate the crystal growth of MFI zeolites in the presence of urea,the ratio OH−/SiO_(2)has to be higher than 0.2,independent of the TPA+*** role of urea in the assistance of plate-like crystal formation through the inhibition of(010)facet growth was revealed by electron microscopy and infrared(IR)spectroscopy *** developed strategy for morphological engineering is not limited to the MFI-type zeolite and can be applied to other frameworks depending on the intrinsic properties of additive molecules and the interactions between them.

关键词： MFI zeolite synthesis nanosheets additives crystal morphology

Single step fabrication of N-doped graphene/Si3N4/SiC heterostructures

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Nano Research 2014年第6期7卷 835-843页

作者： Emilio Velez-Fort Emiliano Pallecchi Mathieu G. Silly Mounib Bahri Gilles Patriarche Abhay Shukla Fausto Sirotti Abdelkarim Ouerghi cnrs-laboratoire de photonique et de nanostructures (LPN) Route de Nozay Marcoussis 91460 France Universite Pierre et Marie Curie (cnrs - IMPMC) 4 PL Jussieu Paris 75005 France Synchrotron-SOLEIL Saint-Aubin BP48 F91192 Gif sur Yvette Cedex France

In-plane heteroatom substitution of graphene is a promising strategy to modify its properties. The ability to dope graphene with electron-donor nitrogen heteroatoms is highly important for modulating electrical properties of graphene. Here we demonstrate a transfer-free method to directly grow large area quasi free-standing N-doped graphene bilayers on an insulating substrate (Si3N4). Electron-bombardment heating under nitrogen flux results in simultaneous growth of N-doped graphene and a Si3N4 layer on the SiC surface. The decoupling of N-doped graphene from the substrate and the presence of Si3N4 are identified by X-ray photoemission spectroscopy and low-energy electron diffraction. The substitution of nitrogen atoms in the graphene planes was confirmed using high resolution X-ray photoemission spectroscopy which reveals several atomic configurations for the nitrogen atoms: Graphitic-like, pyridine-like, and pyrroliclike. Furthermore, we demonstrated for the first time that N-doped graphene could be used to efficiently probe oxygen molecules via nitrogen atom defects.

关键词：掺杂石墨氮化硅 X射线光电子能谱异质结碳化硅加工单步低能电子衍射

Self-organized metal-semiconductor epitaxial graphene layer on off-axis 4H-SiC（0001）

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Nano Research 2015年第3期8卷 1026-1037页

作者： debora Pierucci Haikel Sediri Mahdi Hajlaoui Emilio Velez-Fort Yannick J. Dappe Mathieu G. Silly Rachid Belkhou Abhay Shukla Fausto Sirotti Noelle Gogneau Abdelkarim Ouerghi cnrs- laboratoire de photonique et de nanostructures Route de Nozay 91460 Marcoussis France Synchrotron-SOLEIL Saint-Aubin BP48 F91192 Gifsur Yvette Cedex France Universite Pierre et Marie Curie (cnrs - IMPMC) 4 PI. Jussieu 75005 Paris France Service de Physique de retat Condense (cnrs URA2464) IRAMIS CEA Saclay 91191 Gif-Sur-Yvette France

graphene 的显著性质在未来电子学为新观点显示出诺言，尤其是为纳米规模设备。这里，我们在离开轴 4H-SiC (0001 ) 上取向附生地种 graphene 底层并且表明单层 graphene 的周期的安排的形成在上平面(0001 )\ 上的平台和伯纳尔 bilayer ... 详细信息

graphene 的显著性质在未来电子学为新观点显示出诺言，尤其是为纳米规模设备。这里，我们在离开轴 4H-SiC (0001 ) 上取向附生地种 graphene 底层并且表明单层 graphene 的周期的安排的形成在上平面(0001 )\ 上的平台和伯纳尔 bilayer graphene ((11 \bar 20 )\) nanofacets 原文如此。我们用拉曼光谱学，原子力量 microscopy/electrostatic 力量显微镜学(AFM/EFM ) 和 X 光检查和解决的角度调查这些侧面的超点阵光致核裂变光谱学(XPS/ARPES ) 。EFM 和 ARPES 的关联在 \ 上在叠 AB 的 bilayer graphene 揭示永久电子乐队差距的外观((11 \bar 20 )\) 原文如此 150 兆电子伏的 nanofacets。这个特征被密度证实功能的理论(DFT ) 计算。在底层和 graphene bilayer 之间的费用转移导致在顶和打开精力差距的底部 graphene 层之间的不对称的费用分布。这个表面组织能因此被定义为自我组织的金属半导体 graphene。

关键词： 4H-SiC 金属半导体自组织石墨角分辨光电子能谱离轴体外静电力显微镜

Investigation of KTiOPO4 nanocrystals by means of second-harmonic light emission

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Chinese Optics Letters 2008年第1期6卷 64-67页

作者： Chunyuan Zhou Loc Le Xuan Abdallah Slablab Nicolas Sandeau Sophie Brasselet Dominique Chauvat Jean-Francois Roch laboratoire de photonique Quantique et Moléculaire ENS Cachan UMR CNRS 8537 61 avenue du President Wilson 94235 Cachan Cedex France

The finding of nonlinear nanometric-sized probes is of key importance for the development of nonlinear microscopy in physical as well as biological sciences. We isolate nonlinear KTiOPO4 nanocrystals and study them by second-harmonic generation microscopy （SHGM） and atomic force microscopy （AFM） independently. With both polarization analysis and defocused imaging of the emitted second harmonic field, we extract the Euler angles of the crystalline axes of a single nanocrystal. A balanced coherent optical homodyne detection shows the coherent nature of the nanocrystal nonlinear emission and allows a phase measurement of the emitted second-harmonic field. These features make the KTiOPO4 nanocrystal a good candidate for a vectorial probe of electromagnetic near fields.

关键词： KTiOPO4 谐波光发射物理学

Soft nanoimprint lithography

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Soft nanoimprint lithography

Recent advances in germanium emission[Invited]

Photonics Asia 2004;Optoelectronics,Microelectronics,and Nanotech

作者： E.Roy Y. Kanamori M.Belotti D.decanini laboratoire de photonique et de nanostructures cnrs 91460 Marcoussis France laboratoire de photonique et de nanostructures cnrs 91460 Marcoussis France laboratoire de photonique et de nanostructures cnrs 91460 Marcoussis France laboratoire de photonique et de nanostructures cnrs 91460 Marcoussis France

We developed a UV assisted soft nanoimprint lithography (UV-SNIL) that can be applied for the reproduction of nanometer features over large areas. Based on a simple argument deduced from the Navier-St

关键词： nanoimprint, soft lithography, soft stamps, molding pattern replication, nanofabrication

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Photonics Research 2013年第3期1卷 102-109页

作者： P.Boucaud M.El Kurdi A.Ghrib M.Prost M.de Kersauson S.Sauvage F.Aniel X.Checoury G.Beaudoin L.Largeau I.Sagnes G.Ndong M.Chaigneau R.Ossikovski Institut d’Electronique Fondamentale CNRS-Univ.Paris Sud 11Bâtiment 220F-91405 OrsayFrance STMicroelectronics 850 rue Jean Monnet38920 CrollesFrance laboratoire de photonique et de nanostructures CNRS-UPR 20Route de Nozay 91460 MarcoussisFrance laboratoire de Physique des Interfaces et des Couches Minces CNRS-Ecole polytechniqueF-91128 PalaiseauFrance

The optical properties of germanium can be tailored by combining strain engineering and n-type *** this paper,we review the recent progress that has been reported in the study of germanium light emitters for silicon *** discuss the different approaches that were implemented for strain engineering and the issues associated with n-type *** show that compact germanium emitters can be obtained by processing germanium into tensile-strained microdisks.

关键词： emitter doping strained

High-Harmonic Generation and Correlated Electron Emission from Relativistic Plasma Mirrors at 1 kHz Repetition Rate

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Ultrafast Science 2022年第3期2卷 19-27页

作者： Stefan Haessler Marie Ouillé Jaismeen Kaur Maïmouna Bocoum Frederik Böhle Dan Levy Louis Daniault Aline Vernier Jérôme Faure Rodrigo Lopez-Martens laboratoire d’Optique Appliquée ENSTA ParisCNRSEcole PolytechniqueInstitut Polytechnique de Paris181 Chemin de la Hunière et des Joncherettes91120 PalaiseauFrance Ardop Engineering Citéde la Photonique11 Avenue de la CanteranneBât.Pléione33600 PessacFrance department of Physics of Complex Systems Weizmann Institute of ScienceRehovot 7610001Israel

We report evidence for the first generation of XUV spectra from relativistic surface high-harmonic generation(SHHG)on plasma mirrors at a kilohertz repetition rate,emitted simultaneously with energetic *** spectra and electron angular distributions are measured as a function of the experimentally controlled plasma density gradient scale length Lg for three increasingly short and intense driving pulses:24 fs and a0=1:1,8 fs and a0=1:6,and finally 4 fs and a0≈2:1,where a0 is the peak vector potential normalized by mec/e with the elementary charge e,the electron rest mass me,and the vacuum light velocity *** all driver pulses,we observe correlated relativistic SHHG and electron emission in the range Lg∈½λ/20,λ/4,with an optimum gradient scale length of Lg≈λ/*** universal optimal Lg-range is rationalized by deriving a direct intensity-independent link between the scale length Lg and an effective similarity parameter for relativistic laser-plasma interactions.

关键词： Attosecond science and technology Attosecond light source High-harmonic generation

High-finesse Fabry-Perot cavities with bidimensional Si_(3)N_(4) photonic-crystal slabs

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Light(Science & Applications) 2016年第1期5卷 320-327页

作者： Xu Chen Clément Chardin Kevin Makles Charles Caër Sheon Chua Rémy Braive Isabelle Robert-Philip Tristan Briant Pierre-François Cohadon Antoine Heidmann Thibaut Jacqmin Samuel deléglise laboratoire Kastler Brossel UPMC-Sorbonne UniversitésCNRSENS-PSL Research UniversityCollège de France4 place JussieuCase 74F75252 ParisFrance Current address:IBM Research-Zürich Säumerstrasse 48803 RüschlikonSwitzerland laboratoire de photonique et de nanostructures LPN-cnrs/cnrs Route de Nozay91460 MarcoussisFrance UniversitéParis Diderot Sorbonne Paris Cité75207 ParisFrance

Light scattering by a two-dimensional photonic-crystal slab(PCS)can result in marked interference effects associated with Fano *** devices offer appealing alternatives to distributed Bragg reflectors and filters for various applications,such as optical wavelength and polarization filters,reflectors,semiconductor lasers,photodetectors,bio-sensors and non-linear optical *** PCS also have natural applications in the field of optomechanics,where the mechanical modes of a suspended slab interact via radiation pressure with the optical field of a high-finesse *** reflectivity and transmission properties of a defect-free suspended PCS around normal incidence can be used to couple out-of-plane mechanical modes to an optical field by integrating it in a free-space *** we demonstrate the successful implementation of a PCS reflector on a high-tensile stress Si_(3)N_(4) *** illustrate the physical process underlying the high reflectivity by measuring the photonic-crystal band ***,we introduce a clear theoretical description of the membrane scattering properties in the presence of optical *** embedding the PCS inside a high-finesse cavity,we fully characterize its optical *** spectrally,angular-and polarization-resolved measurements demonstrate the wide tunability of the membrane’s reflectivity,from nearly 0 to 99.9470±0.0025%,and show that material absorption is not the main source of optical ***,the cavity storage time demonstrated in this work exceeds the mechanical period of low-order mechanical drum *** so-called resolved-sideband condition is a prerequisite to achieve quantum control of the mechanical resonator with light.

关键词： Fano resonance high-reflectivity membrane low-loss optical reflector nanomembrane resonator photonic-crystal slab quantum optomechanics

Metallic nanostructures for efficient LED lighting

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Light(Science & Applications) 2016年第1期5卷 778-787页

作者： Gabriel Lozano Said RK Rodriguez Marc A Verschuuren Jaime Gómez Rivas Instituto de Ciencia de Materiales de Sevilla Consejo Superior de Investigaciones Científicas-Universidad de Sevilla(CSIC-US)41092 SevillaSpain laboratoire de photonique et de nanostructures(LPN) Centre National de la Recherche Scientifique(CNRS)91460 MarcoussisFrance Philips Research Laboratories 5656AE EindhovenThe Netherlands Dutch Institute for Fundamental Energy Research 5600 HH EindhovenThe Netherlands COBRA Research Institute Technical University of EindhovenEindhovenThe Netherlands

Light-emitting diodes(LEDs)are driving a shift toward energy-efficient ***,modifying the emission intensities,colors and directionalities of LEDs in specific ways remains a challenge often tackled by incorporating secondary optical *** nanostructures supporting plasmonic resonances are an interesting alternative to this approach due to their strong light–matter interaction,which facilitates control over light emission without requiring external secondary optical *** review discusses new methods that enhance the efficiencies of LEDs using nanostructured *** is an emerging field that incorporates physics,materials science,device technology and ***,we provide a general overview of state-of-the-art LED lighting,discussing the main characteristics required of both quantum wells and color converters to efficiently generate white ***,we discuss the main challenges in this field as well as the potential of metallic nanostructures to circumvent *** review several of the most relevant demonstrations of LEDs in combination with metallic nanostructures,which have resulted in light-emitting devices with improved *** also highlight a few recent studies in applied plasmonics that,although exploratory and eminently fundamental,may lead to new solutions in illumination.

关键词： light-emitting diodes nanophotonics plasmonics solid-state lighting

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