Community Research and Development Information Service - CORDIS

Method for preparation of nPTM with controlled pore shape

The existing production technology has been significantly enhanced to allow the reliable and reproducible manufacture of nanoporous Polycarbonate (PC) membranes with controlled pore size and shape.

The new technology allows the realisation of nanoPTM from PC film characterised by cylindrical smooth pores with diameters in the range 15 - 100nm, and with pore densities in the range 1E6 to 5E9 cm-2. These types of membranes fit within the Ultra-filtration market (pore size <100nm).

Contrary to the previous commercially available nanoPTM materials, which exhibit barrelled pore shape with a high degree of pore wall roughness, the new PC nanoPTM are perfectly cylindrical, smooth and accurately controlled. This makes them ideal for their use as templates: e.g. for the synthesis, by electro-deposition, of single and multi-layered metallic nanowires.

Due to their controlled and homogeneous diameter all along their length, these nanowires have been found to be especially suitable for the study of the GMR properties, and consecutively for the evaluation of the use of this GMR effect for a range of applications.

The new technology is now used for the production of PC nanoPTM lab-scale samples and demonstrated at a production level although scaling - up issues remain to be solved. A patent has been applied for. Applications of the new membranes to other fields (such as filtration /separation) will take time to develop and will probably be in niche areas where there is a specific need for pores with controlled geometry.

Reported by

Whatman SA
11b Avenue Einstein
1348 Louvain-la-Neuve
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