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Advanced Materials Research Laboratory (A.M.R.L.)

Dr. Andy Wright      

Areas of research    Facilities     Publications      Consultancy 

 

Current research opportunities in AMRL

 

Contact

 


OBJECTIVES

The Advanced Materials Research Laboratory (AMRL) was established in 1992 as a center for both fundamental and applied research in novel materials at Glyndŵr University in Wrexham. Previous research activities had concentrated on the growth of both conventional (ZnSe, ZnS) and novel (Ga2Se3, CdMgS) wide band-gap compound semiconductor materials as thin films using the technique of metal-organic chemical vapour deposition (MOCVD) for blue-green optoelectronics.

 

Currently, a major focus of activity in the group is the broad but rapidly expanding area of Nanotechnology with particular emphasis on nanowires including carbon nanotubes. We invented a technique for the direct patterning of vertically aligned metal nanowires using concentrated, focussed magnetic fields and realised a simple field emission device in this way. We also developed a technique (with Leicester University, Prof Andrew Abbott) for conformal overplating of carbon nanotubes with chromium metal using novel ionic liquids and discovered that when formed at low coverage’s that the metal clusters are magnetic. We have also recently discovered that mouse muscle precursor cells are highly aligned on the exposed edges of single walled carbon nanotubes (paper submitted to J. Materials Science and Engineering C). This work is a collaboration with Keele University (Dr. Ian Holt).

 

We have also just started (1st November 2012) a project funded by STFC to develop a more efficient polymer solar cell. This is in collaboration with Rutherford Appleton Laboratories, Oxfordshire.

 

The laboratory also engages with local industry to help develop products and processes. In 2004 the laboratory completed a Knowledge Transfer Partnership (KTP) project (KTP-online) with Micro Materials Ltd (Wrexham) to develop both high temperature and cold stages for their NanoTest instrument. In 2012 we completed another KTP with Ellison Sensors International Ltd to bring in-house the processes for production of silicon-on-sapphire based pressure sensors.

 

PREVIOUS AREAS OF RESEARCH
 


The Nanotube Site

Collaborations with other organisations included Manchester University (TEM studies of rare-earths in both GaAs and Si/SiGe Dept. EE&E), microwave ceramics (Materials Science Centre), High Modulus PBO fibres (Materials Science Centre) and with Coventry University the study of ACEL ZnS:Cu,Cl powder phosphors (Centre for Data Storage Materials). We also had a collaboration with the European Space Agency (Noordwijk) on the development of superconductive tunnelling junction photon detectors for astronomy (S-CAM project) where structural diagnostics were provided by us using TEM.


FACILITIES

In addition to the  STM-CVD system , the facility consists of three laboratories for wafer preparation, thin film growth.

Services to Industry.


SELECTED PUBLICATIONS

Highly aligned Mouse Muscle cells grown on edges of thick Single Walled Carbon Nanotube films

Andrew C. Wright and Ian Holt, J. Materials Science and Engineering C   submitted

Magnetophoretic Assembly and printing of nanowires

Andrew C. Wright and Michael Faulkner

J. Vacuum Science and Technology B 30(2) (2012) 021603                See http://epubs.glyndwr.ac.uk/amrl/14/ for download

Nanomagnetic domains of chromium deposited on vertically-aligned carbon nanotubes

Andrew C. Wright, Michael K. Faulkner, Robert C Harris, Alex Goddard and Andrew P. Abbott

J. Magnetism and Magnetic Materials 324(24) (2012) 4170-4174           See http://epubs.glyndwr.ac.uk/amrl/15/ for download

 

The influence of the substrate on the growth of carbon nanotubes from nickel clusters -an investigation using STM, FE-SEM, TEM and Raman spectroscopy
A C Wright, Y Xiong, N Maung, S J Eichhorn and R J Young
Materials Scince and Engineering C 23 (2003) 279-283  (PDF)

High resolution and conventional transmission electron microscopy of Ga2Se3 thin films grown by  vapour  phase epitaxy
A C Wright and J O Williams, A Krost, W Richter and D R T Zahn
J. Crystal Growth 121 (1992) No's 1/2 111

Mass-spectrometric study of the pyrolysis reactions in the movpe of Ga2Se3 by in-situ gas sampling
N Maung, G H Fan, T L Ng, J O Williams and A C Wright
Journal of Crystal Growth, (1996), 158, no.1-2, 68-78

Homogeneous thermal-decomposition of dimethylzinc in a metal-organic
vapor-phase epitaxy reactor - an ex-situ investigation by FTIR absorption-spectroscopy
G H Fan , N Maung, T L Ng, J O Williams and A C Wright
Journal of the Chemical Society -Faraday Transactions, (1995), 91, No.19, 3475-3479

Metal-Organic Vapour Phase Epitaxial Growth of Cubic Gallium Selenide, Ga2Se3
T L Ng, N Maung, G Fan, I B Poole, J O Williams, A C Wright, D F Foster and D J Cole-Hamilton
Chemical Vapour Deposition (1996) 2, number 5, 185-189

Thermal decomposition of DtBuSe and DMZn in an MOVPE reactor system
G H Fan, N Maung, T L Ng, P F Heelis, J O Williams, A C Wright, D F Foster and D J Cole-Hamilton
J. Crystal Growth. 1997, 170, No.1-4, 485-490.
Presented at ICMOVPE VIII, Cardiff, 1996

Growth studies by Reflectance Anisotropy Spectroscopy (RAS) on MOVPE grown ZnSe
D Gnoth, I B Poole, T L Ng, D A Evans, N Maung, J O Williams and A C Wright
J. Crystal Growth. 1997, 170, No.1-4, 198-202.
Presented at ICMOVPE VIII, Cardiff, (1996)

MOVPE growth of Magnesium Cadmium Sulphide: Rocksalt of Sphalerite?
I B Poole, T L Ng, N Maung, J O Williams and A C Wright
J. Crystal Growth.
1997, 170, No.1-4, 528-532.
Presented at ICMOVPE VIII, Cardiff, (1996)

Metal-Organic Chemical Vapour Deposition for the preparation of new materials and interfaces
J O Williams, N Maung and A C Wright
Chapter 11 from 'Interfacial Science'.
A 'Chemistry for the 21st Century' monograph. Blackwell Science.

Dynamic vapour pressure measurements of di-tertiarybutyl sulphide using an ultrasonic monitor
L D Stockton , T L Ng, N Maung, I B Poole, J O Williams, A C Wright, D F Foster, D J Cole-Hamilton
Journal of Crystal Growth, (1998), 183, No.1-2, pp.95-98

Growth of MgS by MOVPE: The Choice of Sulphur Precursor
L. D. Stockton, T. L. Ng, N. Maung and A C Wright
J. Mater. Sci: Materials in Electronics, (1998), 9, Number 3, pp.207-210

Direct synthesis of II3-V2 compound semiconductors by the Heterovalent Exchange Mechanism
A C Wright, T L Ng and N Maung
Philos. Mag. Vol. A79, No.11 (1999) 2691-2710

A study of the mechanism of the reaction of trimethylgallium with hydrogen selenide
N Maung, G Fan, T-L Ng, J O Williams and A C Wright
J. Mater. Chem., (1999), 9, 2489-2494

Unusual binary optical reflectivity of highly structured epitaxial gallium selenide thin films
A C Wright, T L Ng and N Maung
Advanced Materials, 12 (2000) 273-276

Catching the action on camera to grow thin films
A C Wright,  Materials World, July (1999), 409

Detection of compound formation at the ZnSe/GaAs interface using high resolution transmission electron microscopy (HRTEM).
A C Wright and J O Williams
Journal of Crystal Growth, J Crystal Growth 114 (1991) 99-106

Growth and structural characterisation of molecular beam epitaxial erbium-doped GaAs
I Poole, K E Singer, A R Peaker and A C Wright
J. Crystal Growth 121 (1992) 121

Self-organising growth of erbium arsenide quantum dots and wires in gallium arsenide by molecular beam epitaxy
K E Singer, P Rutter, A R Peaker and A C Wright
Applied Physics Letters, 64 (1994) 707

Two beam high resolution dark-field imaging: Applications to epitaxial semiconducting materials
A C Wright and J O Williams
Proc. Conf. Microscopy of semiconducting materials (1993). Oxford University
IOP publishing.
Conference series No. 134; section 1, pages 51-54

Structural characterisation of luminescent Ca0.95Cd0.05S
A C Wright, I V F Viney, B Ray, J Britewell and B W Arterton
J. Materials Science: Materials in Electronics 7 (1996) 305-308

Orientation dependent growth of TmAs wires in GaAs grown by MBE
A C Wright, M R Bennett and K E Singer
Proc. conf. Microscopy of semiconducting materials -10 (1997). Oxford University 7-10 April
IOP publishing, Bristol.
Conference series No. 157 ; section , page 385-388.

MOVPE Growth of ZnSe: The effect of initiation conditions -a study by TEM
A C Wright, D N Gnoth, T L Ng and N Maung.
Applied Surface Science. Volumes 123/124 (1998) 555-559

Microstructure of Zinc Selenide single crystals grown by Solid Phase Recrystallisation
A C Wright
J. Crystal Growth, Vol. 203 No. 3 (1999) 309-316

Artefacts in Iodine-Ion milling of some compound semiconductors
A C Wright
Ultramicroscopy, Vol. 83 (2000) 1-8

A structural evaluation of ZnS-based electroluminescent phosphors and devices: a comparison with performance
A C Wright and I V F Viney
Philos. Mag. B, Vol. 81 No. 3, (2001), 279-297

On the origin of compositional fluctuations in ZnSe1-xSx alloys grown by metal-organic vapour phase epitaxy
A C Wright and N Maung
Philos. Mag.  Vol. 83 No. 22, (2003) 2641-2652
  (PDF)

Two-component dendritic gels: Easily tunable materials
A R Hirst, D K Smith, M C Feiters, H P M Geurts and A C
Wright
J. AMERICAN CHEM. SOC.
Vol. 125 (30) (2003) 9010-9011 (doc). Supplementary material (doc) 

Oligomerisation and neurotoxicity of the amyloid ADan peptide implicated in Familial Danish Dementia
V Lelyveld, N Gunasekera, M Lee, G Gibson,  O M A El-Agnaf, A C Wright and B Austen. J. Neurochemistry 88(2) (2004) 281-290 (doc).


An Ab Initio and Density Functional Theory Study of the Trimethylgallium- Hydrogen Selenide Adduct: (CH3)3Ga:SeH2,
N Maung, Journal of Molecular  Structure (THEOCHEM), (1998), 432, 129-137

An Ab Initio and Density Functional Theory Study of the Dimethylzinc- Hydrogen Selenide Adduct: (CH3)2Zn:SeH2,
N Maung, Journal of Molecular  Structure (THEOCHEM), (1998), 434, 255-264

The evaluation of bond dissociation energies for simple sulphur containing molecules using ab initio and density functional methods
N Maung, Journal of Molecular Structure (THEOCHEM), (1999), 460,  No.1-3, pp.159-166

Studies of the thermal and photochemical decomposition mechanisms of But2Se in the presence of Me2Zn using deuterium labelled analogues
N L Pickett, D L Foster, N Maung and D J Cole-Hamilton
J. Materials Chemistry, 9 (1999) 3005-3014


CONTACT
Dr. Andrew C. Wright,
PP19,  Institute for Arts, Science and Technology
Glyndŵr University,
Plas Coch, Mold Road,
Wrexham,
LL11 2AW,
U.K.

Tel. 01978 293369 (+44 1978 293369)
Fax 01978 290008 (+44 1978 290008)
Email:  email.gif


The pages on this site are maintained by  -Andy Wright-  and were last modified on 11th December 2012

 


Copyright exist on all material on this site. Copyrighted material is provided for research and private use only and may only be copied or used for other purposes with permission.

 


 

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