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  • 1
    Online Resource
    Online Resource
    Growth of Pd nanoparticles on prestructured HOPG surfaces ; Croissance de Nanoparticules de Pd sur surfaces de HOPG préstructurées (2013)
    [Erscheinungsort nicht ermittelbar] : HAL CCSD
    Details
    UID:
    (DE-627)1803904895
    Content: Nanoparticles exhibit size-related properties that different from those observed in bulk materials. Nanoparticle research has attracted intense interest due to its great potential applications. It has been shown that some metallic nanoparticles are catalytically active and effective, such as-Palladium.The aim of this thesis is to study the formation of Pd nanoparticles deposited on pre-structured HOPG (Highly Ordered Pyrolytic Graphite) surfaces in order to optimize their size, density and surface stability. Three major steps were taken in our studies: preparation of substrates, deposition of Pd and characterization of samples by scanning tunneling microscopy (STM). Substrats preparations itself contains two steps : the creation of defects by Aun+ clusters implantation or by bombardment of Co2 ions, followed by thermal oxidation. These steps give the formation of hales with controlled depth and diameter, which serve as anchoring sites for Pd nanoparticles.The STM measurements have allowed us to establish the relationships between the quantity of deposited Pd and the size of Pd nanoparticles formed on the HOPG surface. Two growth modes were clearly observed which are related to the defect sizes created on the HOPG surface. Nanoparticles are present either in the form of pearl necklace or in the form of isolated particles. These samples were then characterized by catalytic measurements in organic synthesis (Heck) and gas catalysis (CO oxidation). ; Les nanoparticules présentent des propriétés liées à la taille qui diffèrent fortement de celles observées dans des matériaux massifs. D'intenses recherches sur les nanoparticules sont actuellement en cours du fait de leurs grandes potentialités. Il a été montré que certaines nanoparticules métalliques sont catalytiquement actives et efficaces, comme par exemple le Palladium. L'objectif de la thèse est d'étudier la formation de nanoparticules de Pd déposées sur des surfaces pré-structurées de HOPG (Highly Ordered Pyrolytic Graphite) afin d'en optimiser la taille, la densité de surface et la stabilité. Trois étapes principales ont été menées dans nos études : la préparation des substrats, le dépôt de Pd et la caractérisation des échantillons par microscopie à effet tunnel (STM). La préparation des substrats contient elle-même deux étapes : la création de défauts par l'implantation d'agrégats Aun+ ou le bombardement de Co2, suivie d'une oxydation thermique. On obtient ainsi la formation de trous contrôlés en profondeur et en diamètre, qui serviront de sites d'ancrage pour les nanoparticules de Pd. Les mesures STM nous ont permis d'établir la relation entre la quantité de Pd déposée et la taille des nanoparticules de Pd formées à la surface du HOPG. Deux modes de croissance ont clairement été mis en évidence. Ils sont liés à la taille des défauts dans le HOPG. Les nanoparticules se présentent soit sous la forme de colliers soit sous la forme de particules isolées. Ces échantillons ont ensuite été caractérisés par des mesures de catalyse en chimie organique (Heck) ainsi qu'en catalyse gaz (oxydation du CO).
    Note: Dissertation HAL CCSD 2013
    Language: French
    URL: kostenfrei
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    Online Resource
    BSZ
    GBV
  • 2
    Book
    Book
    Multiscale design system (2008)
    Ann Arbor, Mich. : ProQuest LLC
    Details
    UID:
    (DE-627)78928443X
    Format: XI, 143 S. , graph. Darst.
    ISBN: 9780549816485
    Note: Troy, NY, Rensselaer Polytechnic Inst., Ph.D. Thesis, 2008
    Language: English
    Keywords: Hochschulschrift
    URL: Inhaltsverzeichnis
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    Book
    GBV
  • 3
    Article
    Article
    Local government schools in Sung China : a reassessment (1994)
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    Details
    UID:
    (DE-627)1630998176
    ISSN: 0018-2680
    In: History of education quarterly, New York, NY : Cambridge University Press, 1961, 34(1994), 2, Seite 193-213, 0018-2680
    In: volume:34
    In: year:1994
    In: number:2
    In: pages:193-213
    Language: English
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    Article
    Bildungsgesch. Forschung get availability status
    BSZ
  • 4
    Book
    Book
    Communicating science : media reporting on forests in a changing climate (2010)
    Göttingen
    Details
    UID:
    (DE-627)662123069
    Format: VIII, 65 Bl. , Ill., graph. Darst., Tab.
    Note: Göttingen, Univ., Masterarbeit, 2010
    Language: English , German
    Keywords: Hochschulschrift
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    Book
    GBV
  • 5
    Article
    Article
    Local government schools in Sung China : a reassessment (1994)
    Show associated volumes
    Details
    UID:
    (DE-602)gbv_1630998176
    ISSN: 0018-2680
    In: History of education quarterly, New York, NY : Cambridge University Press, 1961, 34(1994), 2, Seite 193-213, 0018-2680
    In: volume:34
    In: year:1994
    In: number:2
    In: pages:193-213
    Language: English
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    Article
    Bildungsgesch. Forschung get availability status
    KOBV
  • 6
    Article
    Article
    The status of Confucianism in modern Chinese education, 1901-49 : a curricular study (2001)
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    Details
    UID:
    (DE-627)535292953
    ISBN: 0472111515
    In: Education, culture, and identity in twentieth-century China, Ann Arbor : University of Michigan Press, 2001, (2001), Seite 193-216, 0472111515
    In: year:2001
    In: pages:193-216
    Language: Undetermined
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    Article
    GBV
  • 7
    Book
    Book
    Song dai jiao yu : Zhong guo gu dai jiao yu de li shi xing zhuan zhe = Education of the Sung dynasty : a pivotal turn in traditional Chinese education (1991)
    [Guang zhou] : Guang dong gao deng jiao yu chu ban she
    Details
    UID:
    (DE-605)HT020152559
    Format: 5, 326 Seiten , 21 cm
    Edition: Di 1-ban
    Original writing edition: 第1版
    Original writing title: 宋代教育
    Original writing title: 中国古代教育的历史性转折
    Original writing person/organisation: 袁征
    Original writing publisher: [广州] : 广东高等教育出版社
    ISBN: 753610670X
    Language: Chinese
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    Book
    HBZ
  • 8
    Book
    Book
    Jing guan suo yan (54)
    Tai bei : Yi wen yin shu guan
    Details
    UID:
    (DE-603)473807734
    Format: 16, 18, 13 S.
    Edition: Chu ban
    Original writing edition: 初版
    Original writing title: 井觀瑣言
    Original writing person/organisation: 鄭瑗
    Original writing publisher: 臺北 : 藝文印書館
    Series Statement: Bai bu cong shu ji cheng / Yan Yi ping ji. 18, Bao yan tang mi ji [6,3]
    Language: Chinese
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    Book
    HeBIS
  • 9
    Book
    Book
    Tiao xiao ou shu (54)
    Tai bei : Yi wen yin shu guan
    Details
    UID:
    (DE-604)BV047146760
    Format: Getr. Zählung
    Original writing title: 蜩笑偶書
    Original writing person/organisation: 鄭瑗
    Original writing publisher: 臺北 : 藝文印書館
    Series Statement: Bai bu cong shu ji cheng / Yan Yi ping ji [6,4]
    Language: Chinese
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    Book
    BVB
  • 10
    Book
    Book
    jing guan suo yan (2003)
    shang hai
    Details
    UID:
    (DE-602)gbv_1033331309
    Format: 233-254 S.
    Edition: 影印本, 新1版
    Original writing title: 井观琐言 三卷
    Original writing person/organisation: 鄭瑗
    Original writing publisher: 上海 : 上海古籍出版社
    ISBN: 753253300X
    Series Statement: wen yuan ge si ku quan shu : zi bu = wen yuan ge si ku quan shu : zi bu : za jia lei 867
    Note: SBB-PK Berlin
    Language: Chinese
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    Stabi Berlin get availability status
    KOBV
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