Sains Ma1aysiana 26(2): 1-4                                                                                                           Sains Fizis/

                                                                                                                                                                Physical Sciences

Evidence of Ginsburg-Landau Behaviour in

a Microemulsion System

Shahidan Radiman

Jabatan Sains Nukleus

Fakulti Sains Fizik & Gunaan

43600 UKM Bangi Selangor D.E.

ABSTRACT

The evolution of microemulsion microstructure formed from didodecyl dimethyl ammonium bromide, water and cyclohexane which started from being structureless (fiat scattering profile) to a mean-field Ginsburg-Landau behaviour is shown. The evolution gave the characteristic Lorentzian scattering profile as the system approaches phase separation.

ABSTRAK

Evolusi mikrostruktur mikroemulsi yang terbentuk daripada didodesil dimetil ammonium bromida, air dan sildoheksana tiada berstruktur (profil serakan yang malar) kepada medan-min Ginsburg-Landau. Evolusi tersebut memberikan serakan Lorentz apabila komposisinya menghampiri sempadan pemisahan fasa.

RUJUKAN/REFERENCES

Sahidan Radiman, C. Toprakcioglu and Faruqi, A.R. 1990a. Symmetry transitions in the cubic phase ofa ternary surfactant system. Journal de Physique (France) 51: 1501-1508.

Sahidan Radiman. 1990b. Structural Characterisation of Microemulsion Systems. Ph.D. Thesis Univ. of Cambridge, United Kingdom.

Sahidan Radiman. 1994a. Partial structure factor on the conducting phase of an anti­ percolation microemulsions. J. Sains Nuklear Malaysia 11 (2): 171-175.

Sahidan Radiman. 1994b. Evidence for an inhomogeneous structure in an antipercolation microemulsion. J. Fizik Malaysia 14(4): 161-164.

Gompper, G. & Schick, M. 1994. Self-Assembling Amphiphillic Systems. Academic Press.

G. Gommpper and M. Shick. 1994. Self-Assembling Amphiphlic Systems. Academic Press.