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Wu, Xiaoyu; Hao, Zhenqi; Wu, Di; Zheng, Lu; Jiang, Zhanzhi
University of Texas, Austin, TX (United States). Funding organisation: USDOE Office of Science - SC, Basic Energy Sciences (BES) (SC-22) (United States)
arXiv e-print [ PDF ]2018
University of Texas, Austin, TX (United States). Funding organisation: USDOE Office of Science - SC, Basic Energy Sciences (BES) (SC-22) (United States)
arXiv e-print [ PDF ]2018
AbstractAbstract
[en] Here, we report quantitative measurements of nanoscale permittivity and conductivity using tuning-fork (TF) based microwave impedance microscopy (MIM). The system is operated under the driving amplitude modulation mode, which ensures satisfactory feedback stability on samples with rough surfaces. The demodulated MIM signals on a series of bulk dielectrics are in good agreement with results simulated by finite-element analysis. Using the TF-MIM, we have visualized the evolution of nanoscale conductance on back-gated MoS2 field effect transistors, and the results are consistent with the transport data. Our work suggests that quantitative analysis of mesoscopic electrical properties can be achieved by near-field microwave imaging with small distance modulation.
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OSTIID--1431207; SC0010308; Available from https://www.osti.gov/pages/biblio/1431207; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; arXiv:1801.09750
Record Type
Journal Article
Journal
Review of Scientific Instruments; ISSN 0034-6748;
; v. 89(4); vp

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AbstractAbstract
[en] A new kind of metamaterial composed of metallic split-ring structure arranged in a two-dimensional array is designed, which shows the multipoles' resonances, especially the magnetic toroidal dipolar (MTD) resonance. The calculated scattering power proves that the resonance at 14.416 GHz is mainly excited by MTD response. Compared with the other two resonances excited by normal multipoles, MTD response has the strongest dependence on permittivity of substrate and background material, which has potential applications on permittivity sensor. (paper)
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Available from http://dx.doi.org/10.1088/0031-8949/88/05/055002; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Physica Scripta (Online); ISSN 1402-4896;
; v. 88(5); [5 p.]

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Ruderman, G.; Xammar Oro, J.R. de
International Centre for Theoretical Physics, Trieste (Italy)1990
International Centre for Theoretical Physics, Trieste (Italy)1990
AbstractAbstract
[en] Dielectric measurements of serum albumin and myoglobin in solutions of varying conductivities were performed. The results presented confirm that also for protein solutions, the Maxwell predictions of a threshold frequency in conducting materials holds. The threshold frequency of a serum albumin solution was experimentally determined. Attention should be recalled that, if the dielectric spectra of proteins solutions want to be measured, three distinct frequency regions are to be observed: a low frequency region, where the sample behaves like a conductor; an intermediate region centered around the threshold frequency, where the free charges partially screen the fixed ones; and a high frequency region where the sample behaves like a good dielectric. (author). 8 refs, 5 figs
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Oct 1990; 14 p
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Report
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AbstractAbstract
[en] The EO10 cavity resonator technique was employed to measure the relative permittivity of corning 7070 glass at 3 GHz. xi was found to be 3.78 +- 0.08 while tan sigma was (2.29 +- 0.02) x 10-3
Source
6 refs.
Record Type
Journal Article
Journal
Nucleus (Karachi); v. 13(1-2); p. 23-24
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Díaz-Calleja, R; Riande, E, E-mail: rdiazc@ter.upv.es2013
AbstractAbstract
[en] This comment summarizes our present view of the complex problem of the influence of the statistical stretching on the permittivity of dielectric polymers in the rubbery state. (comment)
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Source
Available from http://dx.doi.org/10.1088/0964-1726/22/3/038001; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Smart Materials and Structures (Print); ISSN 0964-1726;
; v. 22(3); [2 p.]

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Kevin J. Webb; Shivanand
Purdue University (United States). Funding organisation: USDOE - National Nuclear Security Administration (NNSA) (United States)2007
Purdue University (United States). Funding organisation: USDOE - National Nuclear Security Administration (NNSA) (United States)2007
AbstractAbstract
[en] Silver/silicon dioxide and gold/silicon multilayer imaging structures are shown to have subwavelength imaging performance. The influence of the duty cycle is presented. Imaging possibilities with a slab having isotropic negative effective dielectric constant is also explored. This system may be worthy of an experimental program to establish that subwavelength resolution is practical. Success will lead to a new class of imaging, memory, and interconnection structures
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26 Jul 2007; 4 p; FG52-06NA27505; Also available from OSTI as DE00910219; PURL: https://www.osti.gov/servlets/purl/910219-GpmijH/; doi 10.2172/910219
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Report
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Yao, Xiuchao; Kou, Xuechen; Qiu, Jun, E-mail: qiujun@tongji.edu.cn2018
AbstractAbstract
[en] Highlights: • Nano-Fe3O4/PANI composites have negative permittivity which is significantly affected with the nano-Fe3O4 content. • Improved structure model of “crystal-nano wire” is used to explain the generation mechanism of negative permittivity. • Negative dielectric phenomenon of nano-Fe3O4/PANI composites is explained from the point of structure.
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S0254058418300397; Available from http://dx.doi.org/10.1016/j.matchemphys.2018.01.039; Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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AbstractAbstract
[en] The dielectric and electrical properties of the TlInS2 crystal implanted with protons (protons with the energy of 150 keV) were investigated both in the tetragonal c axis and in the direction perpendicular to this axis. It is shown that the numerical values of the permittivity and electrical conductivity increase sharply in the direction of the c axis and decrease in the direction perpendicular to this axis. The decrease in the anisotropy in the TlInS2 crystal under the influence of protons is associated with the amorphization of the crystal.
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3 figs.; 10 refs.
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Journal Article
Journal
Journal of Radiation Researches; ISSN 2312-3001;
; v. 7(2); p. 14-18

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Duell, Trystan; Muehlbauer, Max; Seitzinger, Timothy; Westfall, James; Rashidi, Reza, E-mail: rashidr@alfredstate.edu2018
AbstractAbstract
[en] This paper presents development of a capacitive microsensor to be used in monitoring of wound healing process. Wounds will heal more quickly if they are kept under a bandage and presently bandages must be removed to track the healing process. This could potentially delay the healing process. A sensor can be used to detect the presence of blood in the wound by measuring the capacitance. Blood has a higher permittivity than air or any other substance that may be in the wound and will significantly increase the total measured capacitance in the device. The presence of blood in the wound under the bandage and so in the device would signify that the wound is not fully healed. The sensor was fabricated using standard MEMS (Microelectromechanical Systems) techniques in cleanroom. The sensor was tested in present of no solution, DI water and saline solution, and capacitance was measured to be 1 pF, 35 pF and 53.3 pF, respectively. (paper)
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ICMMR 2018: 5. International Conference on Mechanics and Mechatronics Research; Tokyo (Japan); 19-21 Jul 2018; Available from http://dx.doi.org/10.1088/1757-899X/417/1/012040; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Conference
Journal
IOP Conference Series. Materials Science and Engineering (Online); ISSN 1757-899X;
; v. 417(1); [5 p.]

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Felyins'kij, S.G.; Korotkov, P.A.; Felyins'kij, G.S.
4. Ukrainian Scientific Conference on Semiconductor Physics (USCPS - 4). Part 2. Abstracts2009
4. Ukrainian Scientific Conference on Semiconductor Physics (USCPS - 4). Part 2. Abstracts2009
AbstractAbstract
No abstract available
Original Title
Analyiz vyid'jemnoyi dyielektrichnoyi proniknostyi dlya metamateryialyiv ICh dyiapazonu
Source
Machulin, V.F. (ed.); Naukova Rada z Problemi 'Fyizika Napyivprovyidnikyiv ta Napyivprovyidnikovyi Pristroyi' pri VFN Natsyional'noyi Akademyiyi Nauk Ukrayini, Kyiv (Ukraine); Myinyisterstvo Osvyiti yi Nauki Ukrayini, Kyiv (Ukraine); Ukrayins'ke Fyizuchne Tovaristvo, Odesa (Ukraine); Yinstitut Fyiziki Napyivprovyidnikyiv yim. V.Je. Lashkaryova NAN Ukrayini, Kyiv (Ukraine); Klasichnij Privatnij Universitet, Zaporizhzhya (Ukraine); Zaporyiz'kij Natsyional'nij Tekhnyichnij Universitet, Zaporyizhzhya (Ukraine); Zaporyiz'kij Natsyional'nij Universitet, Zaporyizhzhya (Ukraine); VAT 'Zavod Napyivprovyidnikyiv', Zaporyizhzhya (Ukraine); Akademyiya Nauk Vishchoyi Shkoli, Kyiv (Ukraine); 231 p; ISBN 978-966-414-058-1;
; 2009; p. 221; USCPS-4: 4. Ukrainian Scientific Conference on Semiconductor Physics. Conference dedicated to the 50 anniversary of the Institute of Semiconductor Physics after V.E. Lashkaryov of NASU foundation; 4. Ukrayins'ka Naukova Konferentsyiya z Fyiziki Napyivprovyidnikyiv (UNKFN-4). Konferentsyiya prisvyachena 50-ryichchyu stvorennya Yinstitutu Fyiziki Napyivprovyidnikyiv yim. V.Je. Lashkaryova NAN Ukrayini; Zaporyizhzhya (Ukraine); 15-19 Sep 2009; Available from Ukrainian INIS Centre

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