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ADVANCED MATERIALS FOR MOLECULAR ELECTRONICS: ULTRATHIN CONDUCTING ORGANIC FILMS

Objective

The aim of the project is to investigate advanced materials in the form of ultra-thin conducing organic films (Langmuir-Blodgett film) for applications in molecular electronics. The programme envisages the following phases: Identification of the nature and molecular composition of the films through the analysis of their spectral properties. Investigation of the linear dichroic behaviour in the visible and infrared to obtain information on the average orientation of the molecular species in the film. Improvement in experimental and theoretical analysis methods for relating spectral and physical properties with the degree of microscopic disorder and establishing clear relationships between optical transport and magnetic properties. The expected S and T benefits in this project are related to the fact that this will be the first time that an active organic system has been applied to molecular electronics applications. The economic benefits fall into 2 categories: - short-term benefits: use of these materials in electronics and gas sensors of the direct resistance type; - long-term benefits: the development of electrically active materials at the molecular size level.
The results were: development of conducting organic sheets with thickness in the nanometric range; an electron resist, elaborated from this material, makes feasible the microcircuits directly obtained without any developing process; a gas sensor made from the same material can detect 0.4 ppm of phosphine (value below the human toxicity level) by simple resistance measurement.
THE PROGRAMME ENVISAGES THE FOLLOWING PHASES:

- IDENTIFICATION OF THE NATURE AND MOLECULAR COMPOSITION OF THE FILMS THROUGH THE ANALYSIS OF THEIR SPECTRAL PROPERTIES.
- INVESTIGATION OF THE LINEAR DICHROIC BEHAVIOUR IN THE VISIBLE AND INFRARED TO OBTAIN INFORMATION ON THE AVERAGE ORIENTATION OF THE MOLECULAR SPECIES IN THE FILM
- IMPROVEMENT IN THE METHODS OF EXPERIMENTAL AND THEORETICAL ANALYSIS FOR RELATING SPECTRAL AND PHYSICAL PROPERTIES WITH THE DEGREE OF MICROSCOPIC DISORDER AND ESTABLISHING CLEAR RELATIONSHIPS BETWEEN OPTICAL TRANSPORT AND MAGNETIC PROPERTIES.

THE EXPECTED S&T BENEFITS IN THIS PROJECT ARE RELATED TO THE FACT THAT THIS WILL BE THE FIRST TIME THAT AN ACTIVE ORGANIC SYSTEM HAS BEEN APPLIED TO MOLECULAR ELECTRONICS APPLICATIONS. THE ECONOMIC BENEFITS FALL INTO 2 CLASSES:
- SHORT-TERM BENEFITS: USE OF THESE MATERIALS IN ELECTRONICS AND GAS SENSORS OF THE DIRECT RESISTANCE TYPE.
- LONG-TERM BENEFITS: THE DEVELOPMENT OF ELECTRICALLY ACTIVE MATERIALS AT THE MOLECULAR SIZE LEVEL.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Commissariat à l'Energie Atomique (CEA)
Address

91191 Gif-sur-yvette
France

Participants (2)

HERMANN-MORRITZ
France
Address

Chassant
UNIVERSITÀ DEGLI STUDI DI PADOVA
Italy
Address

35131 Padova