All Outputs (271)

Low temperature synthesis of high molecular weight polyaniline using dichromate oxidant. (1997)
Journal Article
Adams, P., Abell, L., Middleton, A., & Monkman, A. (1997). Low temperature synthesis of high molecular weight polyaniline using dichromate oxidant. Synthetic Metals, 84(1-3), 61-62

Aniline was polymerised at temperatures of between 0 and -35 degrees C in acid solution containing lithium chloride and using dichromate oxidant. The optimum temperature to give high molecular weight polyaniline in the emeraldine oxidation state in g... Read More about Low temperature synthesis of high molecular weight polyaniline using dichromate oxidant..

Thermal studies of doped polyaniline (1997)
Journal Article
Abell, L., Pomfret, S., Adams, P., & Monkman, A. (1997). Thermal studies of doped polyaniline. Synthetic Metals, 84(1-3), 127-128

The thermal behaviour of camphorsulphonic acid doped polyaniline was studied using T.G.A, D.S.C. and D.M.T.A methods in an attempt to find the best processing conditions.

Electrical conductivity enhancement of predoped polyaniline by stretch orientation (1996)
Journal Article
Abell, L., Adams, P., & Monkman, A. (1996). Electrical conductivity enhancement of predoped polyaniline by stretch orientation. Polymer, 37(26), 5927-5931

A method for the reproducible production of isotropic free standing camphorsulfonic acid doped polyaniline with a conductivity of (300 +/- 30) S cm(-1) is described. The paper then goes on to describe a method of stretch orienting such films to enhan... Read More about Electrical conductivity enhancement of predoped polyaniline by stretch orientation.

A hybrid phthalocyanine/silicon field-effect transistor sensor for NO2 (1996)
Journal Article
Barker, P., Petty, M., Monkman, A., McMurdo, J., Cook, M., & Pride, R. (1996). A hybrid phthalocyanine/silicon field-effect transistor sensor for NO2. Thin Solid Films, 285, 94-97

Thin films of a metal-free octahexyl-substituted phthalocyanine were prepared by spin coating. The films were smooth and showed optical absorption spectra similar to those of films of a structurally related compound prepared by the Langmuir-Blodgett... Read More about A hybrid phthalocyanine/silicon field-effect transistor sensor for NO2.

Application of electrochemical techniques to the study of Langmuir-Blodgett films of N-octadecylpyridinium-Ni (dmit)(2) (1996)
Journal Article
Goldenberg, L., Monkman, A., Pearson, C., Gibson, J., Bryce, M., & Petty, M. (1996). Application of electrochemical techniques to the study of Langmuir-Blodgett films of N-octadecylpyridinium-Ni (dmit)(2). Thin Solid Films, 285, 512-515

The application of electrochemical techniques to the characterization and doping of Langmuir-Blodgett (LB) films of the amphiphilic N-octadecylpyridinium-Ni(dmit)(2) complex, in solution and in LB film form, is discussed, A stable cyclic voltammetric... Read More about Application of electrochemical techniques to the study of Langmuir-Blodgett films of N-octadecylpyridinium-Ni (dmit)(2).

Low temperature synthesis of high molecular weight polyaniline (1996)
Journal Article
Adams, P., Laughlin, P., Monkman, A., & Kenwright, A. (1996). Low temperature synthesis of high molecular weight polyaniline. Polymer, 37(15), 3411-3417

Oxidative chemical polymerization of aniline in hydrochloric acid solution at sub-zero temperatures leads to polyaniline with a molecular weight five to ten times higher than that prepared at room temperature. The optimum polymerization temperature t... Read More about Low temperature synthesis of high molecular weight polyaniline.

Conductivity studies of polyaniline doped with CSA (1996)
Journal Article
Holland, E., Pomfret, S., Adams, P., & Monkman, A. (1996). Conductivity studies of polyaniline doped with CSA. Journal of Physics: Condensed Matter, 8(17), 2991-3002

Polyaniline films prepared via the camphorsulphonic acid (CSA)m-cresol solution processing route have been synthesized with doping levels in the range of 10-90%. The electrical conductivity of these films has been measured as a function of temperatur... Read More about Conductivity studies of polyaniline doped with CSA.

Electroabsorption measurements of polysquaraine (1996)
Journal Article
Pomfret, S., Monkman, A., & Havinga, E. (1996). Electroabsorption measurements of polysquaraine. Synthetic Metals, 78(3), 285-288

We report an electroabsorption signal for the main IR-Vis absorption peak in thin films of polysquaraine. Spectra from 1.0 to 2.0 eV at a temperature of 10 K show a positive peak at 1.29 eV, followed by a negative peak at 1.35 eV with vibronic struct... Read More about Electroabsorption measurements of polysquaraine.

Electroluminescence from porous silicon using a conducting polyaniline contact (1996)
Journal Article
Halliday, D., Holland, E., Eggleston, J., Adams, P., Cox, S., & Monkman, A. (1996). Electroluminescence from porous silicon using a conducting polyaniline contact. Thin Solid Films, 276(1-2), 299-302. https://doi.org/10.1016/0040-6090%2895%2908102-x

We have fabricated a p-n junction using a p-type conducting polyaniline layer deposited on an n-type porous silicon layer. This junction shows rectifying behaviour. The I–V curves can be fitted to a Schottky barrier model with a barrier height of 0.8... Read More about Electroluminescence from porous silicon using a conducting polyaniline contact.

Optical and electrochemical properties of metallophthalocyanine derivative Langmuir-Blodgett films (1996)
Journal Article
Granito, C., Goldenberg, L., Bryce, M., Monkman, A., Troisi, L., Pasimeni, L., & Petty, M. (1996). Optical and electrochemical properties of metallophthalocyanine derivative Langmuir-Blodgett films. Langmuir, 12(2), 472-476

The formation of high-quality Langmuir-Blodgett films of copper and nickel phthalocyanine derivatives substituted with short branched chains is reported. Ellipsometric and polarized optical absorption measurements suggest that the phthalocyanine mole... Read More about Optical and electrochemical properties of metallophthalocyanine derivative Langmuir-Blodgett films.

Electroabsorption measurements of the emeraldine base form of polyaniline (1996)
Journal Article
Pomfret, S., Rebourt, E., & Monkman, A. (1996). Electroabsorption measurements of the emeraldine base form of polyaniline. Synthetic Metals, 76(1-3), 19-22

Electroabsorption measurements have been performed on the polymeric emeraldine base form of polyaniline and a related phenyl-capped tetramer. The spectra run from the near infrared to the UV, encompassing the main low energy absorption peaks of the m... Read More about Electroabsorption measurements of the emeraldine base form of polyaniline.

Atomic force microscopy investigations of morphologies in ultrathin polyaniline films (1996)
Journal Article
Kugler, T., Rasmusson, J., Osterholm, J., Monkman, A., & Salaneck, W. (1996). Atomic force microscopy investigations of morphologies in ultrathin polyaniline films. Synthetic Metals, 76(1-3), 181-185

Preliminary results of two studies of the morphology of polyaniline, studied by means of atomic force microscopy (AFM), are reported. (1) Emeraldine base (EB)/camphorsulfonic acid (CSA) highly oriented fibers were prepared by a 'hot-drawing' techniqu... Read More about Atomic force microscopy investigations of morphologies in ultrathin polyaniline films.

Synthesis of high molecular weight polyaniline at low temperatures (1996)
Journal Article
Adams, P., Laughlin, P., & Monkman, A. (1996). Synthesis of high molecular weight polyaniline at low temperatures. Synthetic Metals, 76(1-3), 157-160

The oxidative chemical polymerization of aniline in hydrochloric acid solution has been extensively studied at low temperatures. The resulting polyaniline has a molecular weight up to ten times higher than that prepared at room temperature. Polyanili... Read More about Synthesis of high molecular weight polyaniline at low temperatures.

POLYANILINE THIN-FILMS FOR GAS-SENSING (1995)
Journal Article
Agbor, N., Petty, M., & Monkman, A. (1995). POLYANILINE THIN-FILMS FOR GAS-SENSING. Sensors and Actuators B: Chemical, 28(3), 173-179

Thin films of polyaniline have been deposited by spinning, evaporation and by the Langmuir-Blodgett technique. The films are shown to possess slightly different in-plane electrical conductivities, reflecting differences in their chemical structure an... Read More about POLYANILINE THIN-FILMS FOR GAS-SENSING.

THERMOELECTRIC-POWER MEASUREMENTS IN HIGHLY CONDUCTIVE STRETCH-ORIENTED POLYANILINE FILMS (1995)
Journal Article
Holland, E., & Monkman, A. (1995). THERMOELECTRIC-POWER MEASUREMENTS IN HIGHLY CONDUCTIVE STRETCH-ORIENTED POLYANILINE FILMS. Synthetic Metals, 74(1), 75-79

We have measured the thermopower of stretch-oriented, free-standing films of polyaniline (PANi) which after protonation have electrical conductivities of the order 300 S cm(-1) at room temperature. Our data show a striking contrast between trends in... Read More about THERMOELECTRIC-POWER MEASUREMENTS IN HIGHLY CONDUCTIVE STRETCH-ORIENTED POLYANILINE FILMS.

GAS-SENSING USING A CHARGE-FLOW TRANSISTOR (1995)
Journal Article
Barker, P., Dibartolomeo, C., Monkman, A., Petty, M., & Pride, R. (1995). GAS-SENSING USING A CHARGE-FLOW TRANSISTOR. Sensors and Actuators B: Chemical, 25(1-3), 451-453

We report on the successful fabrication of an array of charge-flow transistors incorporating polyaniline films. The electrical d.c. characteristics have been found to be similar to those of conventional metal-oxide-semiconductor field-effect transist... Read More about GAS-SENSING USING A CHARGE-FLOW TRANSISTOR.

ANISOTROPY OF THE CONDUCTIVITY IN POLYANILINE FILMS - EFFECT OF CHAIN ORIENTATION AND HYDRATION (1995)
Journal Article
Travers, J., Leguyadec, P., Adams, P., Laughlin, P., & Monkman, A. (1995). ANISOTROPY OF THE CONDUCTIVITY IN POLYANILINE FILMS - EFFECT OF CHAIN ORIENTATION AND HYDRATION. Journal de chimie physique, 92(4), 1009-1012

Proton relaxation times T-1 and DC conductivity have been measured on unstretched and stretched polyaniline films, in the dried and the hydrated states. It is shown that polaron motion is highly anisotropic at the chain scale and that stretching incr... Read More about ANISOTROPY OF THE CONDUCTIVITY IN POLYANILINE FILMS - EFFECT OF CHAIN ORIENTATION AND HYDRATION.

MICROSCOPIC AND MACROSCOPIC TRANSPORT-PROPERTIES OF POLYANILINE - EFFECT OF CHAIN ORIENTATION AND HYDRATION (1995)
Journal Article
Travers, J., Leguyadec, P., Adams, P., Laughlin, P., & Monkman, A. (1995). MICROSCOPIC AND MACROSCOPIC TRANSPORT-PROPERTIES OF POLYANILINE - EFFECT OF CHAIN ORIENTATION AND HYDRATION. Synthetic Metals, 69(1-3), 229-230

Proton relaxation times T-1 and DC conductivity have been measured on unstretched and stretched polyaniline films, in the dried and the hydrated states. It is shown that polaron motion is highly anisotropic at the chain scale and that stretching incr... Read More about MICROSCOPIC AND MACROSCOPIC TRANSPORT-PROPERTIES OF POLYANILINE - EFFECT OF CHAIN ORIENTATION AND HYDRATION.

POLYANILINE, AIR-STABLE ORGANIC METAL - FACT, NO LONGER FICTION (1995)
Journal Article
Monkman, A., Adams, P., Laughlin, P., & Holland, E. (1995). POLYANILINE, AIR-STABLE ORGANIC METAL - FACT, NO LONGER FICTION. Synthetic Metals, 69(1-3), 183-186

Via improved chemistry we have increased the maximum attainable conductivity in oriented polyaniline. D.C. conductivity's approaching 10(4) Scm(-1) have been measured. Temperature dependent transport measurements reveal that our new polyaniline behav... Read More about POLYANILINE, AIR-STABLE ORGANIC METAL - FACT, NO LONGER FICTION.

MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE (1995)
Journal Article
Pratt, F., Valladares, R., Pattenden, P., Blundell, S., Hayes, W., Monkman, A., & Nagamine, K. (1995). MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE. Synthetic Metals, 69(1-3), 231-232

Muon techniques have been used to study the spill excitations in polyaniline. The relaxation rate provides information about the spin dynamics. 1D spin diffusion is observed at low temperature in non-metallic materials with a crossover to 2 or 3D beh... Read More about MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE.