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Mechanism Analysis of Nonvolatile Graphene Oxide Based Reram with Laterally Structured Device

ECS Meeting Abstracts 2014年第49期MA2014-02卷

作者： Youngmin Park Jieun Ko Jung Ah Lim Sanghun Cho Jeeyoung Yoo Youn Sang Kim Seoul National University Future Convergence Research Division Korea Institute of Science and Technology Seoul 136–791 Republic of Korea Seoul National University The Graduate School of Convergence Science and Technology Program in Nano Science and Technology

There has been an increase in demand for novel nonvolatile-memory technology for low-power, high speed and high scalability because of development of digital technology. With this background, various types of memory are now enthusiastically developed to overcome the limitations of traditional Si-based memory which is difficulty to miniaturize the device and to advance high performance. Resistive random access memory (ReRAM) is a good candidate for next generation devices due to its high speed, low voltage consumption and high scalability. Recently flexible electronic devices such as wearable electronics and optoelectronics have attracted interest, so flexible ReRAM devices are also required. Metal oxide thin film based memory in ReRAM have hitherto been studied mainly as next generation nonvolatile memory devices and have shown good properties such as retention, endurance, and programming characteristics. However, ReRAM based on metal oxide thin film has limitations of fabrication process for flexible device due to their material properties. ReRAM using graphene oxide (GO) is the most promising candidate for the flexible device due to graphene oxide's great electrical and mechanical properties. Graphene oxide ReRAM can be fabricated at room temperature on flexible substrates where metal oxides cannot be. Despite of its excellent properties, the resistive switching mechanisms remain unclear. It is generally assumed that filamentary theory and oxygen migration theory are the major mechanisms of resistive switching phenomena. In this work, we demonstrate the resistive switching mechanisms of ReRAM with laterally structured devices, which have two-terminal electrodes in the same plane. The laterally structured graphene oxide ReRAM devices are fabricated by simple spin-coating method on silicon dioxide substrates. The aluminum (Al) electrodes are deposited on spin-coated grapheme oxide layer by thermal evaporation as shown in Figure 1a. These Al/GO/Al lateral devices sho

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Oxidative Stable Cu 3 Sn nanoparticles for Novel Electrode Fabrication Using Pressure Under Ambient Condition

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ECS Meeting Abstracts 2014年第49期MA2014-02卷

作者： Sanghun Cho Keon-Hee Lim Jeeyoung Yoo Si Yun Park Youngmin Park Youn Sang Kim Seoul National University Seoul National University The Graduate School of Convergence Science and Technology Program in Nano Science and Technology 864-1 Iui-dong Yeongtong-gu Suwon-si Gyeonggi-do Korea

Manufacturing methods of conductive electrode is essential technology for printable electronics such as radio frequency identification tags (RFID), thin film transistor (TFT), ultra high frequency antennas and solar cell. Various fabrication methods of electrodes for printable electronics have been suggested to screen printing, gravure printing and inkjet printing. However, these methods have difficulties to the control of printing pressure, thickness, nozzle blocking, viscosity of ink and coffee ring effect. New technique for electrode for printable electronics needs to perform at room temperature and ambient condition. In addition, copper nanoparticles are good prospective candidate to replace high cost silver because of low-cost, abundant deposit and high conductivity. However, copper nanoparticles have the limitation which is highly oxidative materials and these drawbacks limited practical printing process. To overcome these limitations, conductive materials for electrodes requires high oxidative stable nanoparticles and low cost materials. In this study, we synthesized high oxidative stable, conductive Cu3Sn nanoparticles and fabricated electrode by pressure assisted method at room temperature and ambient condition. Prepared Cu3Sn nanoparticles were confirmed using X-ray diffraction (XRD) and Energy Dispersive X-ray Spectrum (EDS) with High Angle Annular Dark-Field Scanning TEM (HAADF-STEM). Measurement of electrical conductivity was carried out with the 4-point probe methods depending on various value of pressure. The conductive electrodes were obtained by pressure at 530MPa and showed electrical resistivity of less than 19.8 µΩ cm. Electrical resistivity of fabricated electrodes is similar to that of bulk Cu3Sn material (8.8. µΩ•cm). This result is caused by numerous and three dimensional contact of each conductive nanoparticle. To investigate the contact of each nanoparticle, Cross-sectional TEM analysis of pressed nanoparticles was performed. Also, we analy

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Light scattering from coupled plasmonic nanospheres on a stretchable substrate for application as a biosensor or mechanical sensor

Light scattering from coupled plasmonic nanospheres on a str...

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2013 3rd International Conference on Advanced Materials and Information technology Processing (AMITP 2013)

作者： Huai-Yi Xie Mohammad Tariq Yaseen Rakesh Singh Moirangthem Yia-Chung Chang Research Centre for Applied Sciences Academia Sinica Nano Science and Technology Program Taiwan International Graduate ProgramAcademia Sinica Department of Engineering and System Science NTHU Max-Planck-Institut fur Eisenforschung

ISBN: (纸本)9781845648534

The ellipsometric spectra(Ψ and ?) of coupled metallic nanoparticles on a stretchable substrate have been studied via the spherical-harmonics based Green's function *** use Au trimmer nanoparticles and dielectric *** calculated ellipsometric spectra show a plasmonic resonance peak with asymmetric *** a trimmer of metallic nanoparticles on a stretchable substrate,the separation between nanoparticles in the trimmer can be varied by the applied mechanical *** find that both the plasmonic resonance peak position and the signal strength at the resonance frequency are sensitive to the gap distance in the trimmer,which can be controlled by the stretchable *** simulation results indicate that the sensitivity of the plasmonic resonance lineshape to the inter-particle distance allows this coupled nanoparticle system to be used as a biosensor or mechanical *** experimental ellipsometric spectra for closely-spaced metallic nanoparticles on a PDMS substrate are also reported.

关键词： stretchable material optical metrology scattering theory

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Erratum to novel MRI contrast development by lock-in suppression (Magn Reson Med 2014;71:1676–1681)

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Magnetic Resonance in Medicine 2014年第5期72卷

作者： Yu-Wen Chen Chao-Hsiung Hsu Dennis W. Hwang Department of Chemistry and Biochemistry National Chung Cheng University Min-Hsiung Township Chiayi Taiwan These authors contributed equally to this work Molecular Science and Technology Program Taiwan International Graduate Program Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan Department of Chemistry National Tsing-Hua University Hsinchu Taiwan Center for Nano Bio-detection AIM-HI National Chung Cheng University Min-Hsiung Township Chiayi Taiwan

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Cross-plane Seebeck coefficient and thermal conductivity of CuFeSe2 thin film

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AIP Conference Proceedings 2012年第1期1449卷 405-408页

作者： P. C. Lee M. N. Ou J. Y. Luo M. K. Wu Y. Y. Chen Department of Engineering and System Science National TsingHua University Hsinchu Taiwan 30013 R.O.C. and Nano Science and Technology Program Taiwan International Graduate Program Institute of Taiwan Institute of Physics Academia Sinica 128 Academia Road Sec. 2. Nankang Taipei 115 Taiwan

The CuFeSe2 is a member of the I-III-VI2 semiconductors, whereas it shows different physical properties from the chalcopyrite family, include the tetragonal structure, the small band gap ∼0.16 eV and the weak magnetic behavior. Only a few articles focused on this material in recent years. The measurements of the Seebeck coefficient and thermal conductivity of the high quality CuFeSe2 thin film could provide valuable information for its thermal application. In this report, a CuFeSe2 thin film with thickness ∼200 nm on SiO2/Si substrate was prepared by pulse laser deposition (PLD). The highly crystallized film shows a preferred orientation (h 0 0) normal to the film surface. Two pairs of heater/sensor Au strips were thermally deposited on the thin film and substrate separately for thermal conductivity measurement using differential 3ω method. The Seebeck coefficient across the film plane was directly measured by two additional EMF probes below and above the film with temperature gradient generated by heater/sensor at frequency 2ω. The temperature dependence of thermal conductivity and Seebeck coefficient were measured in a wide temperature range from 150 to 300 K. The room-temperature thermal conductivity and Seebeck coefficient are obtained to be 3.5 W/m-K and −108 μV/K respectively.

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Corrigendum: Azide photochemistry for facile modification of graphitic surfaces: preparation of DNA-coated carbon nanotubes for biosensing

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nanotechnology 2013年第37期24卷

作者： Minoo J Moghaddam Wenrong Yang Barbara Bojarski Thomas R Gengenbach Mei Gao Hadi M Zareie Maxine J McCall CSIRO Materials Science and Engineering North Ryde NSW 2113 Australia Present address: School of Life and Environmental Sciences Deakin University Geelong Vic 3217 Australia. CSIRO Materials Science and Engineering Clayton VIC 3169 Australia Institute for Nano-scale Technology University of Technology Sydney NSW 2007 Australia Present address: Nanotechnology Graduate Program Department of Electrical Engineering Gediz University Izmir Turkey. CSIRO Animal Food and Health Sciences North Ryde NSW 2113 Australia

The full text of this article is available in the PDF provided.

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Ligand-exchange of TOPO-capped CdSe quantum dots with quinuclidines

Ligand-exchange of TOPO-capped CdSe quantum dots with quinuc...

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IEEE International Conference on nano/Micro Engineered and Molecular Systems (NEMS)

作者： Judy M. Obliosca Fan-Gang Tseng Ching-Mao Huang Leu-Wei Lo Pen-Cheng Wang Department of Engineering and System Science National Tsing Hua University Hsinchu Taiwan Nano Science and Technology Taiwan International Graduate Program Institute of Physics Academia Sinica Taipei Taiwan Division of Medical Engineering Research National Health Research Institutes Zhunan Taiwan

A series of tertiary amine quinuclidine-capped cadmium selenide (Q-CdSe) quantum dots (QDs) of ~4 nm in diameter was successfully synthesized via ligand exchange process in which the original hydrophobic trioctylphosphine oxide (TOPO) ligand bound to QDs was replaced with stronger quinuclidine derivatives, quinuclidine (Q1), 3-quinuclidinone (Q2) and 3-quinuclidinol (Q3). The ligand exchange of TOPO by Q probed using the combined fluorescence and absorption spectroscopy was achieved in just only a few minutes. Moreover, disappearance of prominent C-H aliphatic stretching (~2900 cm -1 ) and phosphate signal (35 ppm) of TOPO-capped CdSe after replacement with Q as revealed in FT-IR and solid state 31 P-NMR spectra was observed indicating efficient fast ligand exchange.

关键词： Nuclear magnetic resonance Spectroscopy Heating nanoelectromechanical systems Multiplexing Electronic mail Microscopy

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Angle and polarization independent plasmonic infrared band-stop filter with metallic disk on SiO2

Angle and polarization independent plasmonic infrared band-s...

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16th Opto-Electronics and Communications Conference, OECC 2011

作者： Abbas, Mohammed Nadhim Cheng, Cheng-Wen Chang, Yia-Chung Shih, Min-Hsiung Research Center for Applied Sciences Academia Sinica Taipei 11529 Taiwan Institute of Physics and Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 115 Taiwan Department of Engineering and System Science NTHU Hsinchu 300 Taiwan

ISBN: (纸本)9781612842882

We demonstrated Ag/SiO2 metallic disk structure can be applied as an efficient narrow stop band filter in the IR region. The absorption spectra of such structure are investigated both theoretically and experimentally. The metallic disk exhibits only one significant localized surface plasmon polariton mode for both TM and TE polarizations simultaneously which can give an ultrahigh immunity to incident angles and polarization direction. © 2011 National Sun Yat-Sen Univ.

关键词： Silica

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Piezoelectric Materials: All‐Solution‐Processed Flexible Thin Film Piezoelectric nanogenerator (Adv. Mater. 45/2012)

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Advanced Materials 2012年第45期24卷

作者： Sung Yun Chung Sunyoung Kim Ju‐Hyuck Lee Kyongjun Kim Sang‐Woo Kim Chong‐Yun Kang Seok‐Jin Yoon Youn Sang Kim Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 151‐744 Republic of Korea SKKU Advanced Institute of Nanotechnology School of Advanced Materials Science and Engineering Sungkyunkwan University (SKKU) Suwon 440‐746 Republic of Korea Electronic Materials Center Korea Institute of Science and Technology Seoul 136‐791 Republic of Korea Advanced Institutes of Convergence Technology 864‐1 Iui‐dong Yeongtong‐gu Suwon‐si Gyeonggi‐do 443‐270 Republic of Korea

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Synthesis and raman response of multiwalled-carbon nanotubes decorated with gold nanobowls prepared via galvanic replacement of silver nanoparticles

Synthesis and raman response of multiwalled-carbon nanotubes...

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IEEE International Conference on nano/Micro Engineered and Molecular Systems (NEMS)

作者： Judy M. Obliosca Pen-Cheng Wang Fan-Gang Tseng Department of Engineering and System Science National Tsing Hua University Hsinchu Taiwan Nano Science and Technology Taiwan International Graduate Program Institute of Physics Academia Sinica Taipei Taiwan

Gold nanobowls (AuNBs) of ~5 nm in diameter grown on multiwalled carbon nanotubes (MWCNT) were successfully synthesized via galvanic replacement of silver nanoparticles (AgNPs). A 3-fold Raman signal enhancement of MWCNT was observed when Au replacement with Ag approached to completion. Moreover, AuNBs can be readily released from CNT surface via sonication with 1-octanethiol (OT). Our current method demonstrates a novel technique on producing smallest dimension of AuNBs so far simply achieved in wet chemical process.

关键词： Gold Raman scattering Carbon nanotubes Silver nanoparticles nanobioscience Surface treatment

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