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M. A. Druy

Bio: M. A. Druy is an academic researcher from University of Pennsylvania. The author has contributed to research in topics: Polyacetylene & Doping. The author has an hindex of 10, co-authored 11 publications receiving 1551 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the results of an experimental study of electrical conductivity and thermopower in doped polyacetylene are reported, where measurements on both as‐grown and partially oriented films doped with iodine and AsF5; [CH(AsF5)y]x and [CH[I3]x, where y covers the full doping range.
Abstract: The results of an experimental study of electrical conductivity and thermopower in doped polyacetylene are reported. Included are measurements on both as‐grown and partially oriented films doped with iodine and AsF5; [CH(AsF5)y]xand [CH(I3)y]x, where y covers the full doping range. The data indicate three important concentration regimes; the dilute limit (y<0.001), the transitional region (0.001

262 citations

Journal ArticleDOI
TL;DR: The absoulte spin susceptibility of As${\mathrm{F}}_{5}$-doped trans-polyacetylene, was determined by spin resonance techniques for $0.0004l~yl~0.138$ as mentioned in this paper.
Abstract: The absoulte spin susceptibility of As${\mathrm{F}}_{5}$-doped trans-polyacetylene, ${[\mathrm{CH}{(\mathrm{As}{\mathrm{F}}_{5})}_{y}]}_{x}$, was determined by spin resonance techniques for $0.0004l~yl~0.138$. The Curie-law contribution decreases above $y=0.001$ to a level less than 1 ppm in the highly conducting regime. The temperature-independent Pauli term is small (\ensuremath{\le}5\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}8}$ emu/mole) for $yl0.01$, remains small up to $y=0.05$, and shows an abrupt increase near $y=0.07$ to a value of \ensuremath{\sim} 3 \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}6}$ emu/mole at higher concentrations. The results are consistent with the soliton doping mechanism.

190 citations

Journal ArticleDOI
TL;DR: In this article, optical absorption and reflection measurements have been carried out on pure and doped polyacetylene films, and the absorption data are consistent with a model of (CH)X as a direct gap quasi-l d semiconductor; doping with AsF5 or iodine introduces absorption within the gap, but appears to leave the interband transition intact.

126 citations

Journal ArticleDOI
TL;DR: In this paper, a detailed study of magnetic properties of [CHH(I 3 ) y ] x demonstrates that with quasi-uniform doping, the spin susceptibility is small, consistent with the soliton doping mechanism.

122 citations


Cited by
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Journal ArticleDOI
TL;DR: Herein is described a novel, simple, and cheap method to prepare patterns of conducting polymers by a process which the authors term, "Line Patterning".
Abstract: Since the initial discovery in 1977, that polyacetylene (CH)(x), now commonly known as the prototype conducting polymer, could be p- or n-doped either chemically or electrochemically to the metallic state, the development of the field of conducting polymers has continued to accelerate at an unexpectedly rapid rate and a variety of other conducting polymers and their derivatives have been discovered. Other types of doping are also possible, such as "photo-doping" and "charge-injection doping" in which no counter dopant ion is involved. One exciting challenge is the development of low-cost disposable plastic/paper electronic devices. Conventional inorganic conductors, such as metals, and semiconductors, such as silicon, commonly require multiple etching and lithographic steps in fabricating them for use in electronic devices. The number of processing and etching steps involved limits the minimum price. On the other hand, conducting polymers combine many advantages of plastics, for example, flexibility and processing from solution, with the additional advantage of conductivity in the metallic or semiconducting regimes; however, the lack of simple methods to obtain inexpensive conductive polymer shapes/patterns limit many applications. Herein is described a novel, simple, and cheap method to prepare patterns of conducting polymers by a process which we term, "Line Patterning".

1,924 citations

Journal ArticleDOI
Guigang Zhang1, Mingwen Zhang1, Xinxin Ye1, Xiaoqing Qiu1, Sen Lin1, Xinchen Wang1 
TL;DR: The as-prepared iodine functionalized g-CN shows enhanced electronic and optical properties, as well as increased photocatalytic activities in an assay of hydrogen evolution.
Abstract: An optimized and general synthetic strategy based on in-situ iodine modifying of polymeric graphitic carbon nitride is discussed. The as-prepared iodine functionalized g-CN shows enhanced electronic and optical properties, as well as increased photocatalytic activities in an assay of hydrogen evolution.

981 citations

Journal ArticleDOI
TL;DR: In this article, the authors discuss synthetic routes to principal conjugated polymers such as poly(acetylene), polyheterocyclic polymers, poly( p -phenylene vinylene)s, aromatic poly(azomethine)s and poly(aniline) with special emphasis on the preparation of solution (and in some cases thermally) processible polyconjugated systems.

706 citations

Journal ArticleDOI
09 Nov 1989
TL;DR: The basic chemistry and physics of polyacetylene, (CH)/sub x/, the prototype conducting polymer which is characteristic of most other conducting polymers, were described together with a description of the polyanilines, a large new class of conducting polymer.
Abstract: Summary form only given. The basic chemistry and physics of polyacetylene, (CH)/sub x/, the prototype conducting polymer which is characteristic of most other conducting polymers, were described together with a description of the polyanilines, a large new class of conducting polymers. Potential technological applications were discussed. Polyacetylene, (CH)/sub x/ is obtained in the form of silvery, flexible films by the polymerization of gaseous acetylene. >

695 citations