Schottky nanocontacts on ZnO nanorod arrays

We report on fabrication and electrical characteristics of ZnO nanorod Schottky diode arrays. High quality ZnO nanorods were grown for the fabrication of the Schottky diodes using noncatalytic metalorganic vapor phase epitaxy and Au was evaporated on the tips of the vertically well-aligned ZnO nanorods. I-V characteristics of both bare ZnO and Au/ZnO heterostructure nanorod arrays were measured using current-sensing atomic force microscopy. Although both nanorods exhibited nonlinear and asymmetric I-V characteristic curves, Au/ZnO heterostructure nanorods demonstrated much improved electrical characteristics: the reverse-bias breakdown voltage was improved from -3 to -8 V by capping a Au layer on the nanorod tips. The origin of the enhanced electrical characteristics for the heterostructure nanorods is suggested. (C) 2003 American Institute of Physics.X11326sciescopu

Pengaruh Tekanan Anggaran Waktu, Independensi Dan Pengalaman Auditor Terhadap Audit Judgment (Studi Empiris Pada Beberapa Auditor Kantor Akuntan Publik di Tangerang)

Penelitian ini menggunakan penelitian deskriptif kuantitatif. Penelitian ini bertujuan untuk memberikan bukti empiris pengaruh tekanan anggaran waktu terhadap audit judgment, pengaruh independensi terhadap audit judgment, pengaruh pengalaman auditor terhadap audit judgment serta pengaruh tekanan anggaran waktu, independensi dan pengalaman auditor secara simultan terhadap audit judgment pada Auditor Kantor Akuntan Publik di Tangerang. Populasi penelitian ini adalah auditor pada Kantor Akuntan Publik di Tangerang. Sampel ditentukan dengan menggunakan metode purposive sampling. Sampel dalam penelitian ini sebanyak 55 responden. Teknik pengumpulan data menggunakan kuesioner. Kuesioner dalam penelitian ini menggunakan skala likert. Uji kualitas data menggunakan uji validitas dan uji reliabilitas. Uji asumsi klasik menggunakan uji normalitas, uji multikolonieritas, dan uji heterokedastisitas. Pengujian hipotesis dalam penelitian ini menggunakan analisis regresi linier berganda.    Hasil penelitian menunjukkan bahwa tekanan anggaran waktu berpengaruh negatif dan signifikan terhadap audit judgment, independensi berpengaruh positif dan signifikan terhadap audit judgment, pengalaman auditor berpengaruh positif dan signifikan terhadap audit judgmen, dan secara bersama-sama keseluruhan variabel (tekanan anggaran waktu, independensi, dan pengalaman auditor) berpengaruh secara signifikan terhadap audit judgment

Mathematical models of magnetospheric convection and its coupling to the ionosphere

Mathematical models of magnetospheric convection and its coupling to ionospher

Time-resolved photoluminescence of the size-controlled ZnO nanorods

Size dependence of the time-resolved photoluminescence (TRPL) has been investigated for the ZnO nanorods fabricated by catalyst-free metalorganic chemical vapor deposition. The nanorods have a diameter of 35 nm and lengths in the range of 150 nm to 1.1 mum. The TRPL decay rate decreases monotonically as the length of the nanorods increases in the range of 150 to 600 nm. Decrease of the radiative decay rate of the exciton-polariton has been invoked to account for the results. (C) 2003 American Institute of Physics.X11100sciescopu

Fabrication and electrical characteristics of high-performance ZnO nanorod field-effect transistors

We report on fabrication and electrical characteristics of high-mobility field-effect transistors (FETs) using ZnO nanorods. For FET fabrications, single-crystal ZnO nanorods were prepared using catalyst-free metalorganic vapor phase epitaxy. Although typical ZnO nanorod FETs exhibited good electrical characteristics, with a transconductance of similar to140 nS and a mobility of 75 cm(2)/V s, the device characteristics were significantly improved by coating a polyimide thin layer on the nanorod surface, exhibiting a large turn-ON/OFF ratio of 10(4)-10(5), a high transconductance of 1.9 muS, and high electron mobility above 1000 cm(2)/V s. The role of the polymer coating in the enhancement of the devices is also discussed. (C) 2004 American Institute of Physics.X11333sciescopu

Recent advances in the management of nasopharyngeal carcinoma

Developments in serology tests, imaging studies and endoscopic examinations contribute to early diagnosis of nasopharyngeal carcinoma. The primary treatment modality is radiotherapy. When tumour recurs after radiation, then surgical salvage contributes to a better prognosis.published_or_final_versio

Reconstructive surgery: today and tomorrow

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Commentary: Head and neck carcinomas in the developing world

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Perhitungan Struktur Komposit Pembangunan Ruang Kelas Baru Smp Negeri 44 Kecamatan Palaran Kota Samarinda

The process of a structure, a process that is focused and detailed, coherent, and repeatedly, in accordance with the function, layout, land-use of the building to be constructed. In the implementation in the field occurred several times repositioning time, so based on the layout of the building will affect the condition of the structural design of the building.Location development planning activities Negri Junior School Building 44 is located on the road Handil Palaran service districts. The collection of data obtained by data retrieval through secondary data is the data that is required to support primary data obtained from the literature, primary data is the collection of data obtained directly in the field.The contents of this thesis was to identify the multilevel structure calculations portal of reinforced concrete and structural elements in it with conventional mechanics calculation based on the SAP Program 2000 Version 14, the design and analysis of reinforced concrete structural components based on SNI 03-2847-2002.From the results of calculations performed by the authors obtained the calculation of reinforced concrete structures can be solved mengggunakan SAP Program 2000 Version 14, since SAP 2000 program is more practical than the other classical methods. As for the process design of reinforced concrete using the greatest moment values from the calculation on each rod which is reviewed by the SAP program, and also for the calculation of reinforced concrete structures it turns out there is little difference in the design of reinforced concrete beam as the dimensions and amount of reinforcement used

Advanced Nanofabrication Technologies for Making Photo-Response Devices Based on Emerging Layered Transition Metal Dichalcogenides.

Emerging layered semiconductor materials, such as layered transition metal dichalcogenides (TMDCs), have exhibited attractive optoelectronic properties and hold a significant potential to be implemented for making new photoresponse devices. However, to realize working TMDC-based photoresponse devices for practical photovoltaic and photodetection applications, we need to (i) create new nanofabrication and nanomanufacturing technologies capable of producing TMDC devices with deterministic properties, architectures, and arrangements, (ii) develop new materials processing approaches capable of modulating various TMDCs to enable different device applications, and (iii) advance the device physics for understanding and leveraging the unique photonic properties of layered semiconductors. The research works presented in this thesis sought to advance the scientific/technical knowledge toward addressing the needs mentioned above and specifically focused on three relevant topics: (1) invention and demonstration of plasma-assisted transfer nanoprinting technology capable of producing orderly arranged layered material structures into device sites; (2) development and study of plasma-assisted doping processes, which can result in permanently stable doping effects in layered semiconductors; (3) characterization of a series of photoresponse devices based on emerging layered transition metal dichalcogenides (TMDCs), which were fabricated using various techniques, including plasma-assisted doping, stacking of graphene-TMDC heterostructures, and thin-film-metal-induced surface charge transfer (SCT) doping. The presented works have advanced the scientific knowledge and technical capability toward realizing working TMDC-based photoresponse devices for practical photovoltaic and photodetection applications. Additionally, the nanofabrication approaches developed in these works can be generally used for making other TMDC-based nanoelectronic and photonic devices, and the obtained device physics knowledge is anticipated to greatly leverage the uniquely advantageous optoelectronic properties of semiconducting TMDCs for enabling new device applications.PhDMechanical EngineeringUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/120740/1/sjwi_1.pd