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[신소재공정] Single Crystal 단결성

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    [신소재공정] Single Crystal 단결성에 대한 자료입니다.
    목차
    1. Purpose





    2. Theory


    2.1 Single Crystal


    2.2 Analysis method


    2.2.1 XRD


    2.2.2 FE-SEM





    3. Growth of single crystal bulk


    3.1 Design


    3.2 Result





    4. Growth of single crystal thin film


    4.1 Design


    4.2 Result





    5. Growth of single crystal nanowire


    5.1 Design


    5.2 Result


    5.2.1 SEM


    5.2.2 XRD





    6. Reference



    본문내용
    For comparative purposes the corresponding peak-to-background ratios were: 4.4, 7.1 and 7.9 for 5kV, 10kV and 15kV, respectively. In addition to Nb, other elemental peaks could be detected from the surrounding materials. The Al and Si peaks were generated from the holder (the O peak was visible due to oxidation of the holder itself), the Ni peak originated from the sample grid and the extraction replica was mainly responsible for the C peak. (Note: N was not observed in these particles, possibly due to strong absorption by carbon.). For example, a 10nm size particle was selected Fig.3a and a spot analysis was conducted. From the acquired spectrum Fig.3b, the particle was identified as another Nb precipitate. Prior to this study, it was certain that Nb precipitates as particles above 50nm in steel, but identifying precipitates below this size was not clarified. However, from this analysis conducted on carbon extraction replicas using an FE-SEM, it was proven that Nb can indeed precipitate as particles below 50nm (as low as 10 nm).
    FE-SEM was successfully used in characterizing Nb precipitate as low as 10 nm (comparable to the capabilities of a TEM). It was found that by increasing the accelerating voltage from 5kV to 15kV improved the EDS acquisition by taking advantage of the high peak-to-background ratio inherent in thin specimens, such as carbon extraction replicas, due to the small interaction volume.
    3. Growth of single crystal bulk


    3.1 Design

    Molecular formula
    CuSO₄5H₂O
    Melting point
    16136℃
    Specific gravity
    2.284g/ml
    Solubility
    52g/100gH₂O (25℃)
    Molecular weight
    249.69
    PH
    2.480 (25℃)
    system of crystallization
    orthorhombic system
    Table. 2. CuSO₄5H₂O


    Molecular formula
    KH₂PO₄
    Melting point
    96℃
    Specific gravity
    2.238g/ml
    Solubility
    26g/100gH₂O (25℃)
    Molecular weight
    136.09
    PH
    4.2~4.9 (25℃)
    system of crystallization
    tetragonal system
    Table. 3. KDP(KH₂PO₄)


    The growth of KDP and CuSO₄single crystals were carried out by the temperature decrease method and the constant temperature method. The
    참고문헌
    [1]. Greene LE, Law M, Tan DH, Montano M, Goldberger J, Somorjai G, et al. General route to vertical ZnO nanowire arrays using textured ZnO seeds. Nano Lett(2005)
    [2]. Song JH, Zhou J, Wang ZL. Piezoelectric and semiconducting coupled power generating process of a single ZnO belt/wire. A technology for harvesting electricity from the environment. Nano Lett (2006)
    [3]. Buchine BA, Hughes WL, Degertekin FL, Wang ZL. Bulk acoustic resonator based on piezoelectric ZnO belts. Nano Lett (2006)
    [4]. HughesWL,Wang ZL. Nanobelts as nanocantilevers. Appl Phys Lett (2003)
    [5]. Zhang FF, Wang XL, Ai SY, Sun ZD, Wan Q, Zhu ZQ, et al. Immobilization of uricase on ZnO nanorods for a reagentless uric acid biosensor. Anal Chim Acta (2004)
    [6]. Sadek AZ, Wlodarksi W, Li YX, Yu W, Li X, Yu X, et al. A ZnO nanorod based layered ZnO/64° YX LiNbO3 SAW hydrogen gas sensor. Thin Solid Films (2007)
    [7]. Wei A, Sun XW, Wang JX, Lei Y, Cai XP, Li CM, et al. Enzymatic glucose biosensor based on ZnO nanorod array grown by hydrothermal decomposition. Appl Phys Lett (2006)
    [8]. H. Kind, H. Yan, B. Messer, M. Law, P.D. Yang, Adv. Mater. 14, 158 (2002)
    [9]. http://academic.naver.com/view.nhn?doc_id=12996103
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