Nanotechnology Now - Press Release: Advanced sputtering tool will help leading laboratory's research into piezoelectric and pyroelectric transducers, and pec cells for the hydrogen econo

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*low cost electrodes for long-life, solar-based hydrogen production is one focus of research

Advanced sputtering tool will help leading laboratory's research into piezoelectric and pyroelectric transducers, and pec cells for the hydrogen econo

Newhaven, UK and Bucharest, Romania | Posted on August 12th, 2008

Romania's National Institute of Materials Physics (NIMP) has ordered an advanced sputtering tool from Surrey NanoSystems, to support fundamental research into oxide materials including piezoelectric and pyroelectric thin films, and photoelectrochemical cells to support the hydrogen economy.

NIMP chose a configuration of Surrey NanoSystems' Gamma tool, an advanced PVD (plasma vapour deposition) sputtering system. The technical decision was made primarily because of the tool's very high quality of thin film deposition and flexibility of application.

The tool will be used by researchers in NIMP's Laboratory of Ceramic Oxidic Materials. Among the applications being researched by the laboratory are piezoelectric and pyroelectric thin films, temperature sensors and photoelectrochemical (PEC) cells to support hydrogen production by means of water splitting. The latter application is a promising technique to accelerate the development of a hydrogen economy, and NIMP is exploring a number of ideas related to the manufacture of electrodes for PEC cells that can split water with high efficiency, yet be manufactured from low-cost materials and offer the durability required for consumer applications.

Among the key specifications for NIMP is the Gamma tool's very high vacuum capability of 5 x 10-9 Torr, which is as much as two orders of magnitude higher than some other commercially available sputtering systems, as this provides an exceptionally pure environment to aid uniform film deposition. This is supported by an optical heating facility to pre-treat substrates by driving off moisture.

Surrey NanoSystems is additionally fitting the tool with a brand new reactive gas control system. Instead of a conventional DC pulse controlled process, the Gamma tool will use optical emission spectroscopy to control a high performance gas injection system, providing NIMP researchers with additional fine control over the characteristics and quality of film deposition.

Features included to support flexibility of application include the ability to configure the system to support up to four sputtering target materials. This makes it possible to deposit a very broad variety of thin films including metallic films (platinum, titanium and aluminium), ceramic oxides (PZT, BaTiO3), oxide films (TiO2, Al2O3, Fe2O3), as well as seeding layers to obtain highly textured surfaces. The Gamma tool is also able to deposit films at high temperatures — up to 800 degrees C — and anneal materials without breaking the vacuum.

"The Gamma tool is highly configurable, and it allowed us to install all the key facilities we need to support our laboratory's work," says Marius-Cristian Cioangher of NIMP. "Flexibility of set up and control is another important aspect of the tool, and Gamma's graphical MIMIC-style display makes it easy to create and refine application-specific processing recipes."

The National Institute of Materials Physics (NIMP-Bucharest, Romania) came into being in 1977 by the union of laboratories belonging to the Institute of Physics (founded in 1956) ,supervised by Romanian Academy, and the Institute of Atomic Physics (IFA-Bucharest) (founded in 1949). In the early period, the activity was focused on the basic research in condensed matter physics, with new and important results especially in the field of amorphous semiconductors.Then, much effort was devoted to applied research, devices and technologies based on new advanced materials. Today, NIMP Bucharest is devoted to fundamental and applied research and development, with particular emphasis in the fields of solid state physics and materials research. NIMP is a centre of excellence for international cooperation (R&D projects and networks with support for EU, bilateral agreements) and high-level education (PhD, MSc, postgraduate -training courses) and provides a frame for interdisciplinary research in the materials science. Esentially, recent work has has tried to develop a balanced policy of basic and application-oriented research. The institute has about 250 staff, including 174 scientific workers (14 PhD supervisors, 89 doctors, 59 PhD students), 41 research assistants and 32 administrative personnel. More information: www.infim.ro

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