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Alciviadis - Constantinos Cefalas
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Brief CV

 

Dr. A. C. Cefalas is director of research at NHRF. He received his B.SC in Physics from Athens University in 1978, and the MSc and PhD from Manchester University UK on Laser Physics and Nonlinear Optics in 1979 and 1983 respectively. He is the head of the Short Light Wavelengths and Nano-applications Laboratory at this establishment since 1983, which is the main European Laboratory for "157nm technology". He is the author of over 90 scientific papers in high reputed international journals and he had participating in more than 70 international conferences on VUV laser physics and light-matter intraction, in many of them as an invited speaker. A broader description of his research interests are described as" Development of advanced functional materials and methods for nano-applications assisted by short wavelength and laser light at 157nm". He is a member of the Optical Society of America (OSA) and the international Society on Optical Engineering (SPIE) and has been actively involved in many European Research Projects since 1986.

RESEARCH ACTIVITIES AND NANO-APPLICATIONS

A broader description of current research activities and nano-applicationscould be embedded under the general title "Advanced functional materials and methods for nano-applications assisted by short wavelength and laser light at 157nm". The research is directed towards the following directions:

OPTICAL-MAGNETIC-ELECTRONIC PROPERIES OF NANOCOMPOSITES

1) Development of novel wide band gap optical crystals doped with trivalent rare-earth ions. Assessment of their potential use for VUV applications ( passive or active optical elements) is directly related to the evaluation of their optical and electronic properties in the vacuum ultraviolet region of the spectrum (100-200nm). Laser induced fluorescence and VUV absorption spectroscopy were used to identify the electronic energy levels of the 4fn-15d electronic configuration of the trivalent rare earth ions.

2) Evaluation of high resolution sensitive polymeric materials for X-UV (30-100 nm) and VUV (100-180 nm) lithographic applications. The mass spectroscopic and the VUV laser induced fluorescence techniques are the main analytical tools for investigating polymer photo-dissociation dynamics. This in its turn, determines their potential use as high resolution photo-resistive materials for 157nm lithographic applications. Photo-resists supplied by IMEL Demokritos, have been evaluated at 193, 157 and 13.6 nm.

3) Demonstration of functional quantum properties of mesoscopic systems. Small size agglomerations of metallic character, clearly demonstrate the basic quantum ON-OFF switching operation in the molecular level.

4) Magnetic interactions in nano-composite films fabricated by pulsed laser deposition at 157 nm. Films fabricated with this method have enhanced magnetic properties in comparison to other techniques.

SURFACE TREATMENT OF MATERIALS AT 157 nm- HIGH RESOLUTION MICROSCOPY

5) Imaging of biological specimens in vivo on advanced functional polymeric materials, where details of DNA and RNA structures are revealed with resolution better than 10nm. This is achieved by applying Laser Plasma Single Shot Soft X-Ray Contact Microscopy technique (SXRCM), The successful application of biological imaging implies the development of suitable photoresists, which should be high resolution, sensitive with grey scale capabilities.

6) Identification of structural damage of DNA crystals and bases on the molecular level by advanced microscopy techniques.

7) Micro-fabrication of DNA chips at 157 nm.

8) Antifoxing preservation of historic paper with laser light at 157 nm.

ANTICORROSSION ENERGY SAVING

9) Application of molecular technologies for anti-corrosion and energy saving problems. Successful application of the method involves control of nanocrystallization by physical methods, such as control of scalling by magnetic fileld and turbulent flow.

 

 

48, Vassileos Constantinou Aven. 11635 Athens, Greece
Tel: +30 210 7273840, Fax: +30 210 7273842, email :ccefalas@eie.gr