electromagnetic shielding
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Polypyrrole one-dimensional nanostructures (nanotubes, nanobelts and nanofibers) were prepared using three various dyes (Methyl Orange, Methylene Blue and Eriochrome Black T). Their high electrical conductivity (from 17.1 to 60.9 S cm-1), good thermal stability (in the range from 25 to 150 °C) and resistivity against ageing (half-time of electrical conductivity around 80 days and better) were used in preparation of lightweight and flexible composites with silicone for electromagnetic interference shielding in the C-band region (5.85-8.2 GHz). The nanostructures' morphology and chemical structure were characterized by scanning electron microscopy, Brunauer-Emmett-Teller specific surface measurement and attenuated total reflection Fourier-transform infrared spectroscopy. DC electrical conductivity was measured using the Van der Pauw method. Complex permittivity and AC electrical conductivity of respective silicone composites were calculated from the measured scattering parameters. The relationships between structure, electrical properties and shielding efficiency were studied. It was found that 2 mm-thick silicone composites of polypyrrole nanotubes and nanobelts shield almost 80% of incident radiation in the C-band at very low loading of conductive filler in the silicone (5% w/w). Resulting lightweight and flexible polypyrrole composites exhibit promising properties for shielding of electromagnetic interference in sensitive biological and electronic systems.
- MeSH
- azosloučeniny chemie MeSH
- elektromagnetické záření * MeSH
- methylenová modř chemie MeSH
- mikroskopie elektronová rastrovací MeSH
- nanostruktury chemie účinky záření ultrastruktura MeSH
- nanotrubičky chemie účinky záření ultrastruktura MeSH
- nanovlákna chemie účinky záření MeSH
- polymery chemie účinky záření MeSH
- pyrroly chemie účinky záření MeSH
- silikony chemie účinky záření MeSH
- Publikační typ
- časopisecké články MeSH
... 5 Magnetic Fields, 5 The Lorentz Equation, 5 Waves, 5 -- Transverse and Longitudinal Waves, 5 Electromagnetic ... ... 111 Superficial and Deep Kilovoltage Machines, 111 Tube Stand, 112 Collimation, 112 Skin and Eye Shielding ... ... Pion Therapy, 147 Antiproton Therapy Beams, 147 Laser-Induced Proton and Particle Beams, 147 -- Shielding ...
Eighth edition xxiii, 615 stran : ilustrace, tabulky ; 28 cm
- MeSH
- nádory radioterapie MeSH
- nukleární lékařství metody MeSH
- radioterapie metody MeSH
- Publikační typ
- učebnice MeSH
- Konspekt
- Učební osnovy. Vyučovací předměty. Učebnice
- Lékařské vědy. Lékařství
- NLK Obory
- radiologie, nukleární medicína a zobrazovací metody
- onkologie
- NLK Publikační typ
- kolektivní monografie
... Shields Introduction 89 -- The Nature of Chemical Carcinogens: -- Chemistry and Metabolism 89 Animal ... ... Introduction 95 Ionizing Radiation 95 Ultraviolet Light 98 -- Radiofrequencv and Microwave Radiation 99 Electromagnetic ...
10th edition xlv, 2234 s. : il., tab. ; 28 cm
- MeSH
- lékařská onkologie metody trendy MeSH
- management bolesti MeSH
- management nemoci MeSH
- nádory diagnóza epidemiologie etiologie terapie MeSH
- Konspekt
- Patologie. Klinická medicína
- NLK Obory
- onkologie
- NLK Publikační typ
- kolektivní monografie
... Coil 827 -- 27.2.1 Classic Designs 827 -- 27.2.2 Desirable Properties of Main Magnets 833 -- 27.2.3 Shielding ... ... Transmit Coils 847 -- 27.4.2 Receive Coils or RF Probes 848 -- 27.4.3 Classic Designs 849 -- 27.4.4 RF Shielding ... ... Parallel Transmit Coils 888 -- 28.5.2 Interpolation, Extrapolation, and Randomization 889 -- A Electromagnetic ... ... Brief Overview 893 -- A.l Maxwell’s Equations 894 -- A.2 Faraday’s Law of Induction 894 -- A.3 Electromagnetic ... ... Forces 895 -- A.4 Dipoles in an Electromagnetic Field 896 -- XVI -- Contents -- A.5 Formulas for Electromagnetic ...
Second edition xxxii, 944 stran : ilustrace ; 29 cm
- Konspekt
- Patologie. Klinická medicína
- NLK Obory
- radiologie, nukleární medicína a zobrazovací metody
- NLK Publikační typ
- kolektivní monografie
... Exercises 511 -- CHAPTER 13 -- SPECTROSCOPY 512 -- 13.1 Principles of Molecular Spectroscopy: Electromagnetic ... ... Quantized Energy States 514 -- 13.3 Proton Magnetic Resonance (*H NMR) Spectroscopy 515 -- 13.4 Nuclear Shielding ...
3rd ed. 1151, [150] s., tab., vzorce
