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You searched for +publisher:"NSYSU" +contributor:("Der-June Jang"). Showing records 1 – 3 of 3 total matches.

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NSYSU

1. Yang , Meng-Jie. Structural evolution of epitaxial Cu2O/MgO superlattices.

Degree: Master, Physics, 2015, NSYSU

This thesis investigates the epitaxial growth and structural characterizations of Cu2O/MgO superlattices, which consist of alternating layers of cuprous oxide and magnesium oxide epitaxial thin films. The superlattices were grown on c-oriented sapphire (Al2O3) substrates by sputtering at various temperatures under an optimized gas pressure of Ar:O2 mixtures. The intended layer-by-layer growth of superlattices of planar interfaces were not successful when grown at high temperature as the Cu2O films tended to grow in island forms. To entice the so-call layer-by-layer growth that supposedly would lead to planar surface or interfaces, the growth temperatures were dramatically decreased, albeit possibly at the sacrifice of some degree of crystalline perfection only achievable at high temperatures. Without losing the epitaxial nature of the superalttices, however, the adopted range of temperatures of the thin film deposition were somehow able to reduce the mobility of the deposited atoms, as represented by the suppressed island formation and realized smoother interfaces. In this work, high-resolution analytical x-ray diffractometry (XRD), such as 2theta-omega, or grazing angle (GIXRD) scans, and grazing angle X-ray reflectivity (XRR) measurements, were employed to characterize the epitaxial and interfacial nature of the superlattices, and scanning electron microscopy (SEM) was used to observe the surface morphology, while transmission electron microscopy (TEM) operated in high resolution mode, coupled with the electron diffraction pattern formation, was used to achieve atomic imaging and micro- and nanostructures characterizations of the samples. The effects of an initial MgO layer that was grown at high temperature and the overall dependence of the growth temperature are discussed based on the correlated findings. Advisors/Committee Members: Chih-hsiung Liao (chair), Der-June Jang (chair), Li-Wei Tu (chair), Quark Chen (committee member).

Subjects/Keywords: Superlattices; Cu2O; MgO; CuO; Epitaxy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Yang , M. (2015). Structural evolution of epitaxial Cu2O/MgO superlattices. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727115-160339

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Yang , Meng-Jie. “Structural evolution of epitaxial Cu2O/MgO superlattices.” 2015. Thesis, NSYSU. Accessed February 17, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727115-160339.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Yang , Meng-Jie. “Structural evolution of epitaxial Cu2O/MgO superlattices.” 2015. Web. 17 Feb 2019.

Vancouver:

Yang M. Structural evolution of epitaxial Cu2O/MgO superlattices. [Internet] [Thesis]. NSYSU; 2015. [cited 2019 Feb 17]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727115-160339.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yang M. Structural evolution of epitaxial Cu2O/MgO superlattices. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727115-160339

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


NSYSU

2. Cheng, Yi-Fen. Study of Magneto-Transport and Hall Effect of P-type ZnO Film.

Degree: Master, Physics, 2013, NSYSU

Wurtzite ZnO exhibits along its c-axis a spontaneous polarization that leads to Quantum-Confined Stark Effect (QCSE) and reduces its luminous efficiency. Use of ZnO crystals with the c-axis in-plane oriented, such as those of m-cut and a-cut surface, are considered a solution to the QCSE problems. In this thesis work, thin film samples of m-plane oriented ZnO (m-ZnO) are grown on m-plane sapphire by Atomic Layer Deposition (ALD). The post-deposition annealing effects on the crystal structures, optical and electrical transport properties of the m-ZnO thin films were investigated. From Hall measurement results, the samples are p-type semiconductors whose carrier concentrations decrease after post-annealing. The functional dependence of electrical resistivity on temperature delineate classic semiconductor behaviors characteristic of thermally-activated impurities of specific energy levels. Analysis indicates the existence of a transition temperature at which the overall properties show a transition temperature between two electronic phases, each having a distinctive set of active impurity energy levels. Weak localization effect leads to negative MR, which is particularly prominent at low temperatures. Multi-peak analysis give the band gap Eg ~ 3.27-3.3(eV), with some small differences along c-axis and a-axis after annealing. The band gap states variations are more complex, possibly due to the intricate emergence of defects or imperfection of various kinds. Advisors/Committee Members: Zhi-xiong liao (chair), Der-June Jang (chair), Li-Wei Tu (chair), Quark, Yung-Sung Chen (committee member).

Subjects/Keywords: Hall effect; magnetoresistance; ZnO; Al2O3; atomic layer deposition

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Cheng, Y. (2013). Study of Magneto-Transport and Hall Effect of P-type ZnO Film. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0802113-164123

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Cheng, Yi-Fen. “Study of Magneto-Transport and Hall Effect of P-type ZnO Film.” 2013. Thesis, NSYSU. Accessed February 17, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0802113-164123.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Cheng, Yi-Fen. “Study of Magneto-Transport and Hall Effect of P-type ZnO Film.” 2013. Web. 17 Feb 2019.

Vancouver:

Cheng Y. Study of Magneto-Transport and Hall Effect of P-type ZnO Film. [Internet] [Thesis]. NSYSU; 2013. [cited 2019 Feb 17]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0802113-164123.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cheng Y. Study of Magneto-Transport and Hall Effect of P-type ZnO Film. [Thesis]. NSYSU; 2013. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0802113-164123

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


NSYSU

3. Chang, Ai-Li. Polymer Adsorption on the Air/Solution Interface Probed by Dynamic Surface Light Scattering.

Degree: Master, Physics, 2002, NSYSU

Surface Laser Light Scattering (SLLS) is a heterodyne detection technique used to probe the surface properties of fluid interfaces. These interfaces are either liquid/liquid or vapor/liquid, and they may include insoluble monolayers or polymer films deposited on liquid surfaces as well as microemulsions in solution at low concentration. This technique provides one with a nonperturbative way to obtain surface tension and viscosity. A diffraction grating is employed to provide a stable local oscillatior, hence selecting an accurate ripplon wave vector . This thesis deals with the investigation of the interface between air and solution consisting of the methanol and water mixture and poly(N-isopropylacrylamide) or PNIPAM which is one of the fascinating polymeric materials. The polymer PNIPAM shows distinct responses to variations in the surrounding environment (such as thermal gradient, change in pH, etc.). The surface tension extracted from the SLLS data using the Kelvin equation is found to agree well with that obtained by using the Wilhelmy plate method. For the range of wave vectors cm-1, the power spectrum detected in frequency domain can be fit to a Lorentzian profile. Our experiments show that when the volume percentage of methanol increases, the interfacial property becomes insensitive to the presence of PNIPAM. Advisors/Committee Members: Chin-Hsien Wang (committee member), Der-June Jang (chair), Chie-Tong Kuo (chair), Sheng-Lung Huang (chair).

Subjects/Keywords: surface light scattering; SLLS; poly(N-isopropylacrylamide); surface tension; PNIPAM

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Chang, A. (2002). Polymer Adsorption on the Air/Solution Interface Probed by Dynamic Surface Light Scattering. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0619102-175305

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Chang, Ai-Li. “Polymer Adsorption on the Air/Solution Interface Probed by Dynamic Surface Light Scattering.” 2002. Thesis, NSYSU. Accessed February 17, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0619102-175305.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Chang, Ai-Li. “Polymer Adsorption on the Air/Solution Interface Probed by Dynamic Surface Light Scattering.” 2002. Web. 17 Feb 2019.

Vancouver:

Chang A. Polymer Adsorption on the Air/Solution Interface Probed by Dynamic Surface Light Scattering. [Internet] [Thesis]. NSYSU; 2002. [cited 2019 Feb 17]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0619102-175305.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chang A. Polymer Adsorption on the Air/Solution Interface Probed by Dynamic Surface Light Scattering. [Thesis]. NSYSU; 2002. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0619102-175305

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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