Functional Materials at Imperial
Research Staff by core themes

"What signal-to-noise problem could a room temperature MASER solve in your industry?" - Professor Alford MBE FREng at the World Economic Forum 2016

"What signal-to-noise problem could a room temperature MASER solve in your industry?" - Professor Alford MBE FREng at the World Economic Forum 2016

Functional materials are generally characterised as those materials which possess particular native properties and functions of their own. For example, ferroelectricity, piezoelectricity, magnetism or energy storage functions.

Functional materials are found in all classes of materials: ceramics, metals, polymers and organic molecules. Functional materials are often used in electromagnetic applications from KHz to THz and at optical frequencies where the plasmonic properties of metals assume particular importance. Functional materials are also of critical importance in materials for energy such as electro- and magnetocaloric materials, for energy storage and for solar harvesting functions.

Research

The thin film activity in the Department of Materials takes place in two groups:

Physical Electronics and Thin Film Materials

This group is headed by Professor Neil Alford MBE, FREng and the main emphasis is on functional oxides. These are materials such as piezoelectrics where the application of a voltage causes a change in dimensions, or ferroelectrics where the application of a voltage causes a change in the relative permittivity. Ferromagnetic materials are used in magnetic storage devices. Recent research into functional materials has been towards combining two or more of these into what is now known as multiferroic materials so for example, a piezolectric “buzzer” is caused by the application of an AC voltage to a piezoelectric material causing it to vibrate. The electric field controls the polarisation, the magnetic field controls the magnetisation and the stress controls the strain. We have compiled a list of microwave dielectric resonator materials and their properties.

Molecular Thin Films

Dr Sandrine Heutz’s group is developing capability in the growth and characterisation of molecular thin films. Molecular materials offer attractive alternatives to inorganics for optoelectronic applications, due to their low cost, low weight and the possibility to modify their properties easily through the insertion of functional groups by chemical synthesis. Their semiconducting character is due to the presence of delocalised π-orbitals, more often C-C double bonds, which leads to a lowering of the bandgap.

The research focuses on commercially available polyaromatic molecules, such as phthalocyanines and perylene derivatives. Those small molecules can be sublimed in the vapour phase, either in vacuum or in a flow of inert gas, leading to the formation of high purity films and self-assembled nanostructures. It is possible to modify the growth conditions (substrate and chamber temperature, flow rate, etc.) to control the film morphological, structural and spectroscopic properties – the typical characteristics of a CuPc film deposited on a glass substrate held at room temperature are shown in figure 2. One of the strengths of the molecular thin films is that they can be deposited onto any substrate including polymers and that flexible complex heterostructures can be formed without the constraints of epitaxy, opening up avenues for plastic electronic and spintronics.

Network and centres 

Centre for Plastic Electronics logo Centre for Plastic Electronics

The Centre for Plastic Electronics' mission is to actively stimulate new, cutting-edge, high-impact research and to meet Imperial’s strategic intent to harness the strengths and breadth of our research to address the global challenges of climate change, energy and global health and security.
Centre for Terahertz Science and Engineering image Centre for Terahertz Science and Engineering (CTSE)

Imperial College London hosts a number of THz research activities within the Departments of Materials, Electrical and Electronic Engineering, and Physics.  CTSE collaborates closely with Imperial's Institute of Security Science and Technology.  The Department of Materials at Imperial College London provides a dedicated laboratory for the Centre.

Functional Materials Staff

Professor Neil Alford MBE FREng

 Professor Neil Alford MBE FREng is Associate Provost (Academic Planning) and Professor of Physical Electronics and Thin Film Materials at Imperial College London.

His current research is targeted towards Energy Materials and he currently leads an EPSRC Programme Grant in Energy Materials. This is closely linked to the nanotechnology activites at Imperial.

In 2011  he and colleagues Mark Oxborrow and Jon Breeze discovered that a Bragg resonator with sapphire plates of aperiodic thickness could achieve an extraordinarily high Q factor for the resonator. This led them to the discovery that it was possible to construct a MASER operating at room temperature and in the earth's magnetic field

>> More about Neil

Research project titleFunding bodyStart date
Reactive Plasmonics: Optical Control of Electronic Processes at Interfaces for Nanocale Physics, Chemistry and Metrology Engineering and Physical Science Research Council (EPSRC) Sept 2015
Advanced Functional Materials Engineering and Physical Science Research Council (EPSRC) Mar 2015
Probing surface-molecule interactions of perovskite catalysts Engineering and Physical Science Research Council (EPSRC)  May 2014
Room temperature, Earth’s field MASER Engineering and Physical Science Research Council (EPSRC)  Jan 2013
Active plasmonics: electronic and all-optical control of photonic signals on sub-wavelength scales Engineering and Physical Science Research Council (EPSRC)  Jul 2009
Professor Neil Alford active research porfolio

Dr Andrew Cairns

Dr Andrew Cairns is Research Fellow in the Department of Materials at Imperial College London.

His research focuses on understanding and exploiting unusual properties of flexible framework materials. Central to this work is the ability to reveal the atomic structure—how atoms are arranged in 3D space—using crystallography. Knowing the atomic structure allows us to design better materials,and push materials with unique properties towards application.

More about Andrew

Dr Sandrine Heutz

Dr Sandrine Heutz is a Reader in the Department of Materials at Imperial College London.

Current research directions are focused on magnetic properties of molecular thin films, spintronic applications, novel fabrication methods for oxides, detailed structural characterisation of films and interfaces, and nanowire devices.  We also work in partnership with industry, for example to explore surfaces with BP-ICAM.

>> More about Sandrine

Research project titleFunding bodyStart date
BP-ICAM 15 BP International Ltd Dec 2014
Dr Sandrine Heutz active research porfolio

Professor Norbert Klein

Professor Norbert Klein is Chair in Professor of Electromagnetic Materials and Sensors in the Department of Materials at Imperial College London.

His main scientific activities are in the area of electromagnetic material characterization and sensor applications, but also on microwave and terahertz devices for communciation and sensing. One current focus is on graphene and related 2D materials, where Norbert is currently establishing a cluster system for 4" graphene growth by chemical vapour deposition. The other focus is on microwave-to-terahertz biosensing, in particular blood analysis by microfluidic-resonator assemblies and single cell detecion in biological liquids. 


Professor Klein has developed practical sensors for security applications - based on earlier work on microwave filters and oscillators for mobile communication, and he holds more than 15 patents. In 2007, he spun out a company (EMISENS), which successfully commercializes a microwave based bottle scanner for airport checkpoints.

>> More about Norbert

Research project titleFunding bodyStart date
Aluminium nitride - graphene dual-mode sensors for cancer cell detection Engineering and Physical Science Research Council (EPSRC) Oct 2017
Advanced Functional Materials Engineering and Physical Science Research Council (EPSRC) Jun 2015
TERACELL: integrated microwaveto-terahertz sensors for label-free circulating tumour cell detection Engineering and Physical Science Research Council (EPSRC) Sep 2014
Professor Norbert Klein active research porfolio

Dr Cecilia Mattevi

Dr Cecilia Mattevi is a Royal Society University Research Fellow in the Department of Materials at Imperial College London.

Cecilia’s current funding supports: science and engineering of 2D semiconducting materials (EPSRC 1st grant, EPSRC-Royal Society fellowship engagement, The Royal Society University Research Fellowship), the development of methods for large scale synthesis of graphene for applications in different technology areas from energy storage to polymer/ceramic composite materials (EPSRC-Graphene Engineering), engineering large scale implementation of graphene-composite (Petronas), and energy applications of graphene derivatives (EU-Graphene Flagship).

>> More about Cecilia

Research project titleFunding bodyStart date
Graphene Based Disruptive Technologies Commission of the European Communities Apr 2016
GRAPHENE/INORGANIC Hollow Fibre Membranes for water Treatment 2 S/P Engineering and Physical Science Research Council (EPSRC) Apr 2015
Dr Cecilia Mattevi active research porfolio

Dr Mark Oxborrow

Dr Mark Oxborrow is a Reader in Functional Microwave Materials and Devices in the Department of Materials at Imperial College London.

His research interests are in the development of extremely low-noise microwave amplifiers based on organic paramagnetic materials for applications in space communication and medical diagnostics.

>> More about Mark 

Research project titleFunding bodyStart date
Advanced Functional Materials Engineering and Physical Science Research Council (EPSRC) Jun 2015
Manufacturing routes for organic room-temperature MASER Engineering and Physical Science Research Council (EPSRC)  May 2013
Dr Mark Oxborrow active research porfolio

Dr Peter Petrov

Dr Petrov is Principal Scienctist in the Department of Materials at Imperial College London. He heads the Thin Film Technology Laboratory located in the Deptment of Materials. The Laboratory is part of the London Centre for Nanotechnology and provides the lead UK Universities and industrial partners with facilities for nano-scale thin film deposition, device patterning and electrical characterisation.


>> More about Peter

Professor Natalie Stingelin

Professor Natalie Stingelin is a Professor of Organic Functional Materials at the Department of Materials at Imperial College London.

Her current research interests encompass the broad field of organic functional materials, including organic electronics, multifunctional inorganic/organic hybrids, and smart, advanced optical systems based on organic matter.

>> More about Natalie
>> Watch Natalie's inaugural lecture

Research project titleFunding bodyStart date
Anti-reflection coating from solution-processable, high-refractive index inorganic/organic hybrid materials Commission of the European Communities Dec 2015
Interfaces in opto-electronic thin film multilayer devices Commission of the European Communities Sep 2015
Centre for Innovating Manufacturing Engineering and Physical Science Research Council (EPSRC) Oct 2013
Professor Natlie Stingelin active research porfolio

Dr Fang Xie

Dr Fang Xie is a Senior Lecturer in the Department of Materials at Imperial College London.

Her research concerns novel nanomaterials synthesis and fabrication and their applications in energy and life sciences.  Metal and semiconducting nanoparticles are prepared by both bottom-up and top-down methods such as colloidal lithography, nanoimprint lithography, and wet chemical synthesis/self-assembly.

>> More about Fang

Research project titleFunding bodyStart date
Nanoscale Engineering of Photoelectrodes for Whole Spectrum Light Harvesting Royal Academy Of Engineering Oct 2016
Low cost sensing chips for early cancer detection British Council (UK) Apr 2016
Dr Cecilia Mattevi active research porfolio