Electrical resistivity and dielectric properties of helical microorganism cells coated with silver by electroless plating

Cai, Jun; Lan, Mingming; Zhang, Deyuan; Zhang, Wenqiang

doi:10.1016/j.apsusc.2012.05.089

Cited by 27 publications

(23 citation statements)

References 17 publications

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“…[30,31] Electroless plating bathsc ontain am etastable pair consisting of am etal complex and ar educinga gent, allowing surface-selective deposition on substrates whichc atalyze and thus enablet he kinetically hindered metal reduction. Once the reactionh as started, the metal film continuously grows due to the autocatalyticn ature of the deposition reaction:t he plated metal catalyzes its own reduction.…”

Section: Resultsmentioning

confidence: 99%

“…The monolithic nanostructures presented in this study were fabricated using electroless plating, a class of solution‐based deposition reactions for the metallization of arbitrarily shaped work pieces 30. 31 Electroless plating baths contain a metastable pair consisting of a metal complex and a reducing agent, allowing surface‐selective deposition on substrates which catalyze and thus enable the kinetically hindered metal reduction. Once the reaction has started, the metal film continuously grows due to the autocatalytic nature of the deposition reaction: the plated metal catalyzes its own reduction.…”

Section: Resultsmentioning

confidence: 99%

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Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

et al. 2015

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We present a versatile approach for the fabrication of well‐defined networks of interconnected metal nanotubes, which applies electroless plating to ion‐track‐etched polymer templates that enclose designed pore networks. In order to obtain self‐supporting structures, the deposition reactions must be optimized to yield conformal nanoscale metal films on microstructured substrates possessing extensive inner surfaces. Using this route, gold, copper, silver, nickel, and platinum nanotube networks are synthesized. The resulting structures can be handled macroscopically and combine a large surface area with continuous mass transport and conduction pathways, rendering them promising for application in, for example, electrocatalysis and sensing. This potential is demonstrated by employing a gold nanotube network for the amperometric detection of hydrogen peroxide, in which excellent sensitivity, catalyst utilization, and stability is achieved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

et al. 2015

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“…In Figure 2b, it can be observed that the cross-section of the PPy micro-helix has a solid and compact interior which has a diameter of about 7.3 µm and a relatively thin outer layer with about 0.3 µm thickness. The appearance of this solid interior is interesting because both the hollow and the solid helical structures have been observed on Cu-coated Spirulina and Ag-coated Spirulina by electroless plating [32,34,36]. This solid interior of the helical structure should be composed of the fixed cytoplasmic components from glutaraldehyde treatment because it also existed in the Spirulina templates without PPy coating.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, Spirulina that is in a perfect helical shape can be easily cultured and extracted in large quantities by simple filtration. Until now, Spirulina -based templates have successfully contributed to the synthesis of the magnetic helix [4,30], silica helix [31], copper helix [32,33,34], Ni-Fe-P alloy helix [35], and silver helix [36].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of the Conducting Polymer Micro-Helix Based on the Spirulina Template

Ouyang

Liu

et al. 2018

Polymers

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Abstract:As one of the most interesting naturally-occurring geometries, micro-helical structures have attracted attention due to their potential applications in fabricating biomedical and microelectronic devices. Conventional processing techniques for manufacturing micro-helices are likely to be limited in cost and mass-productivity, while Spirulina, which shows natural fine micro-helical forms, can be easily mass-reproduced at an extremely low cost. Furthermore, considering the extensive utility of conducting polymers, it is intriguing to synthesize conducting polymer micro-helices. In this study, PPy (polypyrrole), PANI (polyaniline), and PEDOT (poly(3,4-ethylenedioxythiophene)) micro-helices were fabricated using Spirulina platensis as a bio-template. The successful formations of the conducting polymer micro-helix were confirmed using scanning electron microscopy (SEM). Fourier transform infrared spectroscopy (FTIR) and Raman and X-ray diffraction (XRD) were employed to characterize the molecular structures of the conducting polymer in micro-helical forms. In the electrochemical characterization, the optimized specific capacitances for the PPy micro-helix, the PANI micro-helix, and the PEDOT micro-helix were found to be 234 F/g, 238 F/g at the scan rate of 5 mV/s, and 106.4 F/g at the scan rate of 10 mV/s, respectively. Therefore, it could be expected that other conducting polymer micro-helices with Spirulina as a bio-template could be also easily synthesized for various applications.

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“…Copper and nickel exhibit good electrical conductivity and low cost, but they are easily oxidized, resulting in unstable properties. 7 Silver, as one of the best conductive substances that contains unique properties in terms of high electrical conductivity, stretchability, 19 salt spray mist corrosion durability, 20 and wide applicable temperature range, 21 has been the focus of great interest. 22 However, silver is easy to subside and agglomerate on account of its high specific gravity and poor interfacial adhesion.…”

Section: Introductionmentioning

confidence: 99%

Resistivity optimization and properties of silver nanoparticles-filled alcohol-soluble conductive coating based on acrylic resin

Kong

et al. 2015

High Performance Polymers

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An alcohol-soluble acrylic resin used to improve the dispersity of modified silver nanoparticles (AgNPs) was successfully synthesized. The structure of acrylic resin was designated according to the elements and groups on the surface of modified AgNPs. The content of g-(2,3-epoxypropoxy)propytrimethoxysilane (KH-560) and conductive filler, temperature, mechanical properties, anticorrosion, and so on were investigated in order to optimize the electrical conductivity and dispersion of modified AgNPs in coating. Surface chemical structure of modified AgNPs was characterized by X-ray photoelectron spectroscopy. Morphology of conductive coating was characterized by scanning electron microscopy. Groups in modified AgNPs and acrylic resin were characterized by Fourier transform infrared spectroscopy. And surface resistivity of conductive coating was characterized by digital multimeter techniques. The optimum surface resistivity of the acquired AgNPs conductive coating could be up to 0.01 ohm/sq, reaching the level of electromagnetic interference shielding. Moreover, the conductive coating possesses good property of anti-chemical and weather corrosion resistance.

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Electrical resistivity and dielectric properties of helical microorganism cells coated with silver by electroless plating

Cited by 27 publications

References 17 publications

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

Synthesis and Characterization of the Conducting Polymer Micro-Helix Based on the Spirulina Template

Resistivity optimization and properties of silver nanoparticles-filled alcohol-soluble conductive coating based on acrylic resin

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