Conductive Polymer Spark Gap Igniters

2021 ◽  
Author(s):  
Miranda P. McConnell ◽  
Allison K. Murray ◽  
Bryan W. Boudouris ◽  
I. Emre Gunduz ◽  
Steven F. Son ◽  
...  
Keyword(s):  
Conductive Polymer ◽  
Spark Gap

Design and fabrication of conductive polymer hydrogels and their applications in flexible supercapacitors

2020 ◽  
Vol 8 (44) ◽  
pp. 23059-23095 ◽  
Author(s):  
Xinting Han ◽  
Guangchun Xiao ◽  
Yuchen Wang ◽  
Xiaona Chen ◽  
Gaigai Duan ◽  
...  
Keyword(s):  
Conductive Polymer ◽  
Polymer Hydrogels ◽  
Conductive Materials ◽  
Flexible Supercapacitors

Conductive polymer hydrogels, which combine the advantages of both polymers and conductive materials, have huge potential in flexible supercapacitors.

An efficient and simple spark-gap design for gas lasers

1994 ◽  
Vol 4 (12) ◽  
pp. 2609-2616 ◽  
Author(s):  
M. Diniz Santa Marinha ◽  
L. Marinho Soares ◽  
A. Dias Tavares ◽  
C. E. Fellows ◽  
C. A. Massone
Keyword(s):  
Gas Lasers ◽  
Spark Gap

Power through Intersubjectivity: Representing the Resilient Child in Urban Survival Narratives

2009 ◽  
Vol 2 (1) ◽  
pp. 65-80
Author(s):  
Yvonne Hammer
Keyword(s):  
Social Discourse ◽  
Individual Agency ◽  
Liminal Spaces ◽  
Young Readers ◽  
Problematic Relationship ◽  
Narrative Representations ◽  
Spark Gap ◽  
Urban Survival ◽  
Resilient Child

The problematic relationship between urban dislocation, the proscribed spaces of urban childhood, child marginnalisation and the societal invisibility of under-age citizens is widely thematised in contemporary children's literature. This article examines how childhood agency, as a form of power, becomes aligned with resilience through intersubjectivity in the narrative representations of marginalised child subjects in Virginia Hamilton's The Planet of Junior Brown (1987) and Julie Bertagna's The Spark Gap ( 1996 ). Depictions of child homelessness, which construct resilience in the determination to survive experiences of marginalisation, dislocation and loss, offer an opportunity to examine representations of child subjectivity. This discussion centres on the role of intersubjectivity as an alternative construction to some humanistic frames that privilege the notion of an individual agency divested of childhood's limitations. It identifies the experiential codes which more accurately reflect the choices available to young readers, where liminal spaces of homelessness that first establish social and cultural dependencies are re-interpreted through depictions of relational connection among displaced child subjects. The discussion suggests that these multifocal novels construct dialogic representations of social discourse that affirm intersubjectivity as a form of agency.

Investigation of Polyoxometalate-(Poly)pyrrole Heterogeneous Nanostructures as Cathodes for Rechargeable Magnesium-Ion Batteries

2018 ◽  
Author(s):  
Hakeem K. Henry ◽  
Sang Bok Lee
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Active Material ◽  
Conductive Polymer ◽  
Current Collector ◽  
Constant Current ◽  
Anodized Aluminum ◽  
Transmission Electron ◽  
Pyrrole Monomer

The PMo<sub>12</sub>-PPy heterogeneous cathode was synthesized electrochemically. In doing so, the PMo<sub>12</sub> redox-active material was impregnated throughout the conductive polymer matrix of the poly(pyrrole) nanowires. All chemicals and reagents used were purchased from Sigma-Aldrich. Anodized aluminum oxide (AAO) purchased from Whatman served as the porous hard template for nanowire deposition. A thin layer of gold of approximately 200nm was sputtered onto the disordered side of the AAO membrane to serve as the current collector. Copper tape was connected to the sputtered gold for contact and the device was sealed in parafilm with heat with an exposed area of 0.32 cm<sup>2</sup> to serve as the electroactive area for deposition. All electrochemical synthesis and experiments were conducted using a Bio-Logic MPG2 potentiostat. The deposition was carried out using a 3-electrode beaker cell setup with a solution of acetonitrile containing 5mM and 14mM of the phosphomolybdic acid and pyrrole monomer, respectively. The synthesis was achieved using chronoamperometry to apply a constant voltage of 0.8V vs. Ag/AgCl (BASi) to oxidatively polymerize the pyrrole monomer to poly(pyrrole). To prevent the POM from chemically polymerizing the pyrrole, an injection method was used in which the pyrrole monomer was added to the POM solution only after the deposition voltage had already been applied. The deposition was well controlled by limiting the amount of charge transferred to 300mC. Following deposition, the AAO template was removed by soaking in 3M sodium hydroxide (NaOH) for 20 minutes and rinsed several times with water. After synthesis, all cathodes underwent electrochemical testing to determine their performance using cyclic voltammetry and constant current charge-discharge cycling in 0.1 M Mg(ClO<sub>4</sub>)<sub>2</sub>/PC electrolyte. The cathodes were further characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), and x-ray photoelectron spectroscopy (XPS).

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