Chuanhui Liang

China Academy of Engineering Physics

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Changan Chen

Shanghai Jiao Tong University

F. Gourbilleau

Université de Caen Normandie

Aart W. Kleyn

Leiden University

Wei Jin

Harbin Engineering University

Julien Cardin

Centre de Recherche sur les Ions, les Matériaux et la Photonique

Dongping Wang

First Affiliated Hospital of Guangzhou University of Chinese Medicine

Olivier Debieu

Centre Interuniversitaire de Recherche et d’Ingénierie des Matériaux

Yongtao An

China Academy of Engineering Physics

L. Khomenkova

V.E. Lashkaryov Institute of Semiconductor Physics

Jian Fang

Lanzhou University

Cooperative Institutions

China Academy of Engineering Physics

Chinese Academy of Sciences

Science and Technology on Surface Physics and Chemistry Laboratory

Lanzhou University

Centre National de la Recherche Scientifique

Sichuan University

Chengdu University

Mianyang Normal University

University of Chinese Academy of Sciences

Centre de Recherche sur les Ions, les Matériaux et la Photonique

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Propriétés optique des films minces à base de Si dopé Nd : vers un amplificateur optique

Chuanhui Liang

Cette these decrit le developpement et l’etude de materiaux a base silicium (Si) dedies a des applications en photonique comme l’amplification optique ou le laser. Des matrices de SiO2 et de Si3N4 enrichies en Si contenant des ions de terre rare Nd3+ ont ete etudiees. Dans ces matrices, les ions Nd3+ beneficient d’un transfert d’energie de defauts ou/et de nanoparticules de Si presents dans la matrice hote. Cela permet une excitation indirecte et efficace des ions Nd3+ sur une large bande spectral UV-VIS. Ainsi, une emission remarquable des ions Nd3+ a 920, 1064, and 1300 nm a ete obtenue. Dans le but de developper la couche guidante active d’un guide d’ondes a partir des deux matrices et en choisissant comme figure de merite l’emission des ions Nd3+, l’optimisation de couches dopees Nd a ete menee. La composition a ete modifiee en termes d’exces de Si et de taux de Nd par la technique de pulverisation magnetron. Les deux matrices ont ete recuites par un traitement thermique classique ou rapide afin de modifier la microstructure de celles-ci. L’etude des facteurs influencant les mecanismes d’emission et de sensibilisation des ions Nd3+ a ete realisees. Dans la matrice de SiO2 enrichie en Si, plusieurs sensibilisateurs des ions Nd3+, a base de Si, ont ete identifies. Pour la matrice de Si3N4 enrichie en Si, un mecanisme d'excitation des ions Nd3+ dependant de l’exces de Si a ete mis en evidence. Finalement, un guide d'onde a base de SiO2 enrichie en Si dope Nd3+ a montre un gain net significatif de 0,68 cm-1 (2. 95dB. Cm-1) a 1064 nm.

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Influence of annealing and keV-ion implantation into tungsten on deuterium retention and permeation: The dependence on bulk and surface microstructure

Nuclear Materials and Energy (2020)

Lu Cai Chuanhui Liang X. Y. Lv Wei Jin Linsen Zhou

The microstructure of tungsten, a primary candidate for the first wall of Tokamak devices, affects the retention and permeation of hydrogen isotopes. These have a close connection to the tritium inventory. In this work, the tungsten microstructure was tuned by annealing and intense 15,700 displacements per atom (dpa) keV-W-self-ion implantation. The samples were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM). The results reveal that the annealing treatment has little influence on the crystallite size but decreases the number of defects such as vacancies, which relates to the bulk microstructure. Moreover, ion implantation changes the sample surface from a smooth quasi-mirror to a grey morphology with various voids. The deuterium retention is suppressed by the decrease of bulk defects due to annealing, but does not present a saturation with the displacement damage increase. It is interesting to note that in permeation, the rate limiting step is bulk diffusion while the deuterium permeability is enhanced for samples with a surface modification. The possible permeation mechanisms and their relation with the sample microstructure are discussed in this work.

10.1016/j.nme.2020.100762

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(Invited) Rare Earth Sensitization in Si-Based Structures for Photonic Applications

Meeting abstracts/Meeting abstracts (Electrochemical Society. CD-ROM) (2013)

F. Gourbilleau Chuanhui Liang Yongtao An Alexandre Fafin Julien Cardin

Abstract not Available.

10.1149/ma2013-01/18/792

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Plasma mediated preparation of NiFeNx nanoparticles anchored on nickel foam for efficient oxygen evolution in alkaline solution

Materials Letters (2021)

Yan Pan Yunxi Yao Chuanhui Liang Yifei Yang Jun Chen

Overpotential

Oxygen evolution

Bimetallic strip

10.1016/j.matlet.2021.130371

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Effect of the Si excess on the structure and the optical properties of Nd-doped Si-rich silicon oxide.

HAL (Le Centre pour la Communication Scientifique Directe) (2012)

Chuanhui Liang Olivier Debieu Yongtao An L. Khomenkova Julien Cardin

Silicon oxide

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The contribution of photoinduced charge-transfer enhancement to the SERS of uranyl(VI) in a uranyl-Ag2O complex

Science Bulletin (2019)

Shaofei Wang Shanli Yang Haoxi Wu Jiaolai Jiang Lang Shao

Uranyl

Photoinduced electron transfer

10.1016/j.scib.2019.01.025

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Determination of the detrapping energy of tritium in tungsten

Journal of Nuclear Materials (2020)

Xiaoqiu Ye Gan Li Chuanhui Liang Bangjun Ma Xin Xiang

Thermal desorption

Thermal desorption spectroscopy

10.1016/j.jnucmat.2020.152662

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Morphologies and Magnetic Properties of Cobalt-Iron Prussian Blue Analogues Nanoparticles Synthesized in Microemulsion

Synthesis and Reactivity in Inorganic Metal-Organic and Nano-Metal Chemistry (2010)

Hui Liu Xianlong Du Chuanhui Liang Peng Liu Jianfeng Xu

The structure-dependent magnetic properties of cobalt-iron Prussian blue analogues (PBAs) with different morphologies synthesized in microemulsion were systematically explored by the characterization of XRD, IR, SQUID techniques, etc. And it was observed that both the w (water-to-surfactant molar ratio) and reactant concentrations had a significant effect on the morphologies and structures of the products. The magnetic nanoparticles of cobalt-iron Prussian blue analogues (PBAs) with novel morphologies, e.g., hollow particles in the form of FeIII-CN-CoII, FeII-CN-Co,II and FeII-CN-CoIII entity were prepared. Our results indicated that the nanomaterials possessed distinct magnetic properties in that their coercivities were intensely dependent on sample structure, which was determined by cobalt-to-iron ratios and potassium contents.

Prussian blue

Microemulsion

Nanomaterials

10.1080/15533174.2010.522547

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Using molybdenum carbiding to induce digestion of carbon in H2O2: A sustainable approach to eliminate radioactivity for hazardous graphite waste inherited from nuclear enterprise

Journal of Hazardous Materials (2022)

Min Pang Xiaoyan Zhou Xinyu Jin Ning Zeng Qingkai Zhao

Carbon fibers

Hazardous substance

10.1016/j.jhazmat.2022.128369

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Theoretical and Experimental Study on Exciton Properties of TT-, T-, and H-Nb₂O₅

The Journal of Physical Chemistry C (2020)

Yongfang Jia Mi Zhong Feng Yang Chuanhui Liang Huanxin Ren

We have theoretically and experimentally studied exciton properties of three normal Nb2O5 polymorphs, including pseudo-hexagonal (TT-), orthorhombic (T-), and monoclinic (H-) phases. Theoretical work shows that the exciton binding energy for H-Nb2O5 is 73.553 meV, much higher than that for TT-Nb2O5 (3.515 meV) and T-Nb2O5 (24.071 meV). The H-Nb2O5 material, as characterized by field-induced surface photovoltage spectroscopy, uniquely presents bound exciton states near the bottom of the conduction band. Thermogravimetric analysis and photoluminescence (PL) lifetime demonstrate that the bound exciton states in H-Nb2O5 originate from interactions between the exciton pairs and oxygen vacancy sites. Such excitons in H-Nb2O5 can be effectively dissociated into free electrons and holes with the incorporation of the oxygen vacancies, leading to the longer PL lifetime. This work allows one to find correlations between material structures and exciton properties, which will provide some basic knowledge to optimize materials for optoelectronic and photonic performance.

Monoclinic crystal system

Orthorhombic crystal system

Biexciton

10.1021/acs.jpcc.0c04202

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Citations (25)