Papers published with acknowledgements to GEM Ltd.

Biotechnology

The following list shows the results of work that has been directly funded by Gwent Electronic Materials Ltd. into the area of biosensors, the majority of the work was carried out at the University of the West of England under the control of Dr. J. P. Hart. Some additional studies have also been carried out in conjunction with the University of Leeds

Papers published in collaboration with the University of the West of England.

Further information can be obtained on the Centre for Applied Research in Sciences website.

Gilmartin, M. A. T., Hart, J. P. and Birch, B. J. (1994).

Development of amperometric sensors for uric acid based on chemically modified carbon epoxy-resin and screen-printed electrodes containing cobalt phthalocyanine.
The Analyst, 119, 243.

Sprules, S. D., Hart, J. P. Wring, S. A. and Pittson, R. (1994).

Development of a disposable amperometric sensor for reduced nicotinamide adenine dinucleotide based on a chemically modified screen-printed carbon electrode.
The Analyst, 1994,119, 253.

Hart, J. P. and Hartley, I. C. (1994).

Voltammetric and amperometric studies of Thiocholine at screen-printed carbon electrode chemically modified with cobalt phthalocyanine: Studies towards a pesticide sensor.
The Analyst, 119, 259.

Gilmartin, M. A. T. and Hart, J. P. (1994).

Novel reagentless amperometric biosensor for uric acid based on a chemically modified screen-printed carbon electrode coated with cellulose acetate and uricase.
The Analyst, 119, 833.

Gilmartin, M. A. T. and Hart, J. P., (1994).

Fabrication and characterisation of a screen-printed disposable amperometric cholesterol biosensor.
The Analyst 119, 2331.8

Gilmartin, M. A. T. and Hart, J. P. (1994)

Rapid detection of paracetamol using a disposable, surface modified screen-printed carbon electrode.
The Analyst, 119, 2431.

Hartley, I. C. and Hart, J. P. (1994).

Amperometric measurement of organophosphate pesticides using a screen-printed disposable sensor and biosensor based on cobalt phthalocyanine.
Anal. Proc., 31, 333.

Sprules, S. D., Hart, J. P., Wring, S. A. and Pittson, R. (1995)

A reagentless, disposable, biosensor for lactic acid based on a screen-printed carbon electrode containing Meldola’s Blue and coated with lactate dehydrogenase, NAD+ and cellulose acetate.
Analytica Chemica Acta 304 (1995) 17-24.

Gilmartin, M. A. T., Hart, J. P. and Patton, D. T. (1995)

Prototype, solid-phase, glucose biosensor.
Analyst, 120, 1973-1981

Gilmartin, M. A. T., Hart, J. P. (1995)

Development of one-shot biosensors for the measurement of uric acid and cholesterol.
Anal. Proc., 32,341-345.

Gilmartin, M. A. T., Ewen, R. J. and Hart, J. P. (1996)

Efficacy of organometallic-containing screen-printed carbon strips as catalysts for the oxidation of hydrogen peroxide: A voltammetric and X-ray photoelectron spectroscopic investigation
J. Electroanal Chem., 401, 127-37.

Sprules, S. D., Hart, J. P., Pittson, R. and Wring, S. A. (1996)

Evaluation of a New Disposable Screen-Printed Sensor Strip for the Measurement of NADH and Its Modifications to Produce a Lactate Biosensor Employing Microliter Volumes
Electroanalysis 1996, 8, No. 6

Sprules, S. D., Hartley, I. C., Wedge, R., Hart, J. P. and Pittson, R. (1996)

A disposable reagentless screen-printed amperometric biosensor for the measurement of alcohol in beverages.
Analytica Chemica Acta 329 (1996) 215-221.

Napier, A. and Hart, J. P. (1996)

Volumetric and Amperometric Studies of Selected Thiols and Dimethyldisulfide Using a Screen-Printed Carbon Electrode Modified with Cobalt Phthalocyanine: Studies Toward a Gas Sensor
Electroanalysis 1996, 8, No. 11

Hart, J. P. and Abass, A. K. (1997)

A disposable amperometric gas sensor for sulphur-containing compounds based on a chemically modified screen printed carbon electrode coated with a hydrogel
Analytica Chemica Acta 342 (1997) 199-206.

Abass, A. K., and Hart, J. P. (1997)

Electrocatalytic, diffusional and analytical characteristics of a cobalt phthalocyanine modified, screen-printed, amperometric gas sensor for propanethiol.
Sensors and Actuators, B, 41, 169-175

Hart, J. P., Pemberton, R., Luxton, R., and Wedge, R. (1997)

Studies towards a disposable screen-printed amperometric biosensor for progesterone.
Biosensors and Bioelectronics, 12, 1113-1121.

J. J. Rippeth, T. D. Gibson, J. P. Hart, I. C. Hartley, and G. Nelson (1997)

Flow-injection Detector Incorporating a Screen-printed Disposable Amperometric Biosensor for Monitoring Organophosphate Pesticides.
Analyst, November 1997 Vol. 122 (1425 – 1429)

J. J. Rippeth, T. D. Gibson, J. P. Hart, I. C. Hartley, and G. Nelson (1997)

Stabilisation of Acetylcholinestarase using charged polymers: Towards shelf stable pesticide Biosensors.
Abstracts of the Papers of the American Chemical Society, 1997, 213, No.2 Pt2, 368-PMSE.

Pemberton, R. and Hart, J. P. (1998)

Development of a sensitive selective electrochemical immunoassay for progesterone in cows' milk, based on a disposable screen-printed amperometric biosensor.
Electrochim. Acta, 43, 3567-3574.

Abass, A. K., Hart, J. P., Cowell, D. C. and Chappell, A. (1998)

Development of an amperometric assay for NH₄⁺ based on a chemically modified screen-printed NADH sensor.
Analytica Chemica Acta 373 (1998) 1-8

Hart, J. P., Abass, A. K., Cowell, D. C. and Chappell, A. (1998)

Development of a disposable amperometric ammonia (NH₄⁺) biosensor based on a chemically modified screen-printed carbon electrode coated with glutamate dehydrogenase and NADH.
Electroanalysis, 11, 406-411.

Pemberton, R. M. and Hart, J. P. (1999)

Electrochemical behaviour of triclosan at a screen-printed carbon electrode and its determination in toothpastes and mouthrinses.
Anal. Chim. Acta 390, 107-115.

Hart, J. P., Abass, A. K., Cowell, D. C. and Chappell, A. (1999)

Development of a disposable amperometric NH₄⁺ biosensor based on a chemically modified screen-printed carbon electrode coated with glutamate dehydrogenase, 2-oxoglutarate and NADH.
Electroanalysis, 11, 406-411.

Pemberton, R. M., Hart, J. P., Stoddard, P. and Foulkes, J. A. (1999)

A comparison of 1-Naphthyl Phosphate and 4-Aminophenyl Phosphate as enzyme substrates for use with a screen-printed amperometric immunosensor for progesterone in cows' milk.
Biosensors and Bioelectronics, 14, 495-503.

Wedge, R., Pemberton, R. M., Hart, J. P. and Luxton, R. (1999)

Recent developments towards screen-printed biosensors incorporating a carbon ink modified with the redox mediator, Meldolas Blue.
Anulusis, 27, 570-577

Abass, A. K., Hart, J. P. and Cowell, D. C. (2000)

Development of an amperometric sulfite biosensor based on sulfite oxidase with cytochrome c, as electron acceptor, and a screen-printed transducer.
Sensors and Actuators B: Chemical, 62, 148-153.

Honeychurch, Kevin C., Hart, John P. and Cowell, David C. (2000)

Voltammetric behaviour and trace determination of lead at a mercury free screen-printed carbon electrode.
Electroanalysis, 2000, 12, 171-177.

Boujtita, M., Hart, J. P. and Pittson, R. (2000)

Development of a disposable ethanol biosensor based on a chemically modified screen-printed carbon electrode coated with alcohol oxidase for analysis of beer.
Biosensors and Bioelectronics, Accepted June 2000.

Pemberton, R. M., Hart, J. P. (2000)

An electrochemical immunosensor for milk progesterone using a continuous flow system.
Biosensors and Bioelectronics, submitted May 2000.

Papers published in collaboration with the University Luton.

Comprehensive information about collaborative work may be found at Luton University Sensor and Cryobiology Research Group Leader Professor Brian Birch.

J W Dilleen, S D Sprules, B G D Haggett and B J Birch.

Electrochemical determination of silver in photographic solutions using fixed-volume single-use sensors.
Analyst, 123, 2905-2907, 1998.

J W Dilleen, B J Birch and B G D Haggett.

Voltammetric determination of silver and colour developing agents in photographic solutions at carbon screen-printed electrodes.
[Abstract] ESEAC '98, Coimbra, Portugal. 24-28 May 1998.

J W Dilleen,S D Sprules and B J Birch.

Voltammetry of solid state copper(II) ISEs.
[Abstract] ESEAC '98, Coimbra, Portugal. 24-28 May 1998.

Area of new materials (Printing Techniques).

Work carried out in collaboration with the University of Brunel

The following list shows the results of work that has been directly supported by Gwent Electronic Materials Ltd. into the area of new printing methods, the work was carried out at the University of Brunel under the control of Dr. D. J. Harrison

For further information on the above process see the University of Brunel's Website on Conductive Lithographic Films.

P. S. A. Evans, D. J. Harrison, B. J. Ramsey.

A Novel Circuit Fabrication Technique Using Offset Lithography.
Journal of Electronic Materials

P. S. A. Evans, D. J. Harrison, B. J. Ramsey.

Conductive Lithographic Films.
0-7803-3808-1/97 1997 IEEE. IEEE International Symposium on Electronics and the Environment 5th-7th May 1997 San Francisco California

P. S. A. Evans, D. J. Harrison, B. J. Ramsey, P. R. Shepherd.

Assessment of Conductive Lithographic Films for Microwave Applications.
25th ARMMS Meeting Digest Limply Stoke Bath. U.K.

P. S. A. Evans, D. J. Harrison, B. J. Ramsey, P. R. Shepherd.

Further Developments of Microwave CLF's.
Automated R. F. and Microwave Measurement Society Conference, 7th -8th April 1997

P. S. A. Evans, D. J. Harrison, B. J. Ramsey.

A Comparison of the Characteristics of Conductive Lithographic Films and Screen Printed Circuits.
The Proceedings of the 11th European Passive Components Symposium.

P. S. A. Evans, D. J. Harrison, B. J. Ramsey, P. R. Shepherd.

Lithograpghic Technology for Microwave Integrated Circuits.
I.E.E.Electronic Letters 13 March (1997) Vol.33 No. 6.

P. S. A. Evans, D. J. Harrison, B. J. Ramsey.

A Novel Circuit Fabrication Technique Using Offset Lithography.
Journal of Electronics Manufacturing. (1997) Vol7 No.1 pp 63 - 67

P. S. A. Evans, D. J. Harrison, B. J. Ramsey, P. Harrey.

Revolutionary Eco-Friendly Manufacturing Technique for PCBs.
Engineering Designer (Journal of the Institute of Engineering Designers), (1998) Vol.24, No.3. pp 12 -15

P. S. A. Evans, D. J. Harrison, B. J. Ramsey.

Frequency Selective Filter Structures.
I.E.E.Electronic Letters, (1999) Vol.35 No.4 Feb. 1999, p 306

P. S. A. Evans, D. J. Harrison, B. J. Ramsey, J. Stevenson, A. Walton.

Characterisation of Offset Lithographic Films using Microelectronic Test Structures
IEICE Transactions on Electronics. (Japan) E-82-C, No. 4, pp 576 - 581, April 1999

P. S. A. Evans, P. Harrey, D. J. Harrison, B. J. Ramsey.

R.F. Circulator Structures Via Offset Lithography
I.E.E. Electronic Letters, Vol.35 No.19, September 1999, p1634

P. S. A. Evans, P. Harrey, D. J. Harrison, B. J. Ramsey.

Interdigitated Capacitors by Offset Lithography
Journal of Electronics Manufacture. (Accepted 31/1/00)

D. J. Harrison, B. J. Ramsey.

Environmental Assessment of an Additive Circuit Fabrication Process
Journal of Cleaner Production. (Submitted)

D. J. Harrison, B. J. Ramsey.

Characterisation of Offset Lithographic Printing Press Parameters on Film Conductivity
Journal of Engineering Manufacture. (Submitted)

P. S. A. Evans, P. Harrey, D. J. Harrison.

Integrated Capacitors for Conductive Lithographic Film Circuits
(To be submitted to I.E.E.E. Transactions)

Patent Applications

No.9725195 (Currently in International Phase) Based upon UK Patent Applications: 961227.6, 9620099.3 & 9621571.

Patent Applications

No.PCT/GB99/04064 (Currently in International Phase)

Other publications in the area of new materials (Ceramics)

D. Holland, M. W. G. Lockyer, R.Pittson, P.Morillon and F. Gilbert

Laser Drillable, Green-State Dielectrics.
Ceram proc. Vol. 55 (21st Century Ceramics) Institute of Materials.

L. J. Ecclestone, I. M. Reaney and W. E. Lee

Influence of Additives to Ag Based Electrode Pastes on Bonding to PZT.
University of Sheffield.

J. R. G. Evans, N. Leyland, D. J. Harrison.

Lithographic Printing of Ceramics.
(submitted to Journal of Materials Research) (Queen Mary and Westfield College, Brunel University)

Juha Hagberg, Marko Pudas, Seppo Leppavuori, Ken Elsey, Alison Logan.

Gravue Offset Printing Development for Fine Line Thick Film Circuits.
MicroelectronicsInternational 18/3 (2001) pg 32-35 MCB University Press. ISBN 1356 5362

Patents

International Publication Number: WO 00/49339
International Publication Date: 24^th August 2000
Inventors: JICKELLS, ALEXANDER, PITTSON, MABBUTT.
Abstract.
A radiant burner screen comprises a substrate formed by a heat resistant, porous, rigid, ceramic foam material having a thin tracery or reticular form demarcating the pores which open one into another and of which there are about 30 pores or less per 645.16 square millimetres. This ceramic foam material can be readily and easily permeated by hot gaseous products of combustion from a fluid fuel, for example natural gas, burner. The ceramic foam material which may be a silicate of alumina with preferably no free silica, bears a sprayed on radiation emitter coating at side of the screen. The emitter coating comprises a rare earth element and/or a compound of a rare earth. The rare earth may be ytterbium or erbium and the compound may be ytterbia or erbia. Heat from the hot products of combustion causes the emitter coating to emit radiation incident on a photovoltaic cell arrangement to produce electrical power therein output on line.

Other Publications of GWENT ELECTRONIC MATERIALS Ltd.

N. Cooper and L. D. Embury

Metallisation of New High Temperature Stable Negative Temperature Coefficient Ceramic Passive components.
The Proceedings of the 9th European Passive Components Symposium.

N. Cooper and L. D. Embury.

Aluminium Nitride: Gold interactions at Film Forming Temperatures under normal atmospheric conditions
The Proceedings of the 9th European Passive Components Symposium.

K. C. Elsey

Choices of Materials for Metallisation
The 13th European Passive Components Symposium. (CARTS 1999) (Trends and New Technologies Symposium)