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Pregled bibliografske jedinice broj: 497783

Application of Brewster angle microscopy and fractal analysis in investigations of compressibility of Langmuir monolayers


Risović, Dubravko; Frka, Sanja; Kozarac, Zlatica
Application of Brewster angle microscopy and fractal analysis in investigations of compressibility of Langmuir monolayers // The Journal of chemical physics, 134 (2011), 2; 024701-1 doi:10.1063/1.3522646 (međunarodna recenzija, članak, znanstveni)


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Naslov
Application of Brewster angle microscopy and fractal analysis in investigations of compressibility of Langmuir monolayers

Autori
Risović, Dubravko ; Frka, Sanja ; Kozarac, Zlatica

Izvornik
The Journal of chemical physics (0021-9606) 134 (2011), 2; 024701-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Langmuir monolayer; Brewster angle microscopy; fractal; compressibility; amphiphile
(Langmuirov monoslojsloj; mikroskopija pod Brewsterovim kutem; fraktal; kompresibilnost; amfifilne molekule)

Sažetak
The aim of this study was to investigate the connection between the lipid/amphiphile monolayer structure at the interface and its macroscopic/rheological properties, in particular, to establish the link between the fractality of the monolayer structure and its compressibility modulus. To that purpose we have used fractal analysis of images obtained by Brewster angle microscopy (BAM) to infer the fractal dimension of the monolayer structure and relate its change to the corresponding changes in compressibility derived from simultaneously measured -A isotherm. The results of the study confirmed the starting assumption based on theoretical considerations that the fractal dimension of an amphiphilic monolayer and its compressibility should be correlated. We have shown that there exists a strong correlation between the fractal dimension and the corresponding compressibility modulus of different amphiphilic materials. Thus, confirming the link between the short ordered structure on molecular level and the macroscopic property - compressibility of the monolayer. The established correlation between the fractal dynamics and compressibility modulus of the monolayer enabled identification of onset of percolation – a second order phase transition that is otherwise not easy and unambiguously detectable. We have found that the signature of percolation in a monolayer, regardless of its composition, is occurrence of sharp increase (a jump) of compressibility modulus (at macroscopic level) at the characteristic value of the corresponding fractal dimension D = 1.89. This is the result of abrupt establishment of connected structure on molecular level, consequently involving change in elastic properties of the monolayer on a macroscopic scale. The results of this investigation provide means for unambiguous identification of onset of percolation in Langmuir layer and should facilitate a more efficient application of the percolation theory in further study of processes and structures at the interface during the monolayer compression.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija



POVEZANOST RADA


Projekti:
098-0982915-2899 - Organizacijski procesi i optičke interakcije u kondenziranim molekulskim sistemi (Risović, Dubravko, MZOS ) ( POIROT)
098-0982934-2717 - Priroda organske tvari, interakcije s mikrokonstituentima i površinama u okolišu (Ciglenečki-Jušić, Irena, MZOS ) ( POIROT)

Ustanove:
Institut "Ruđer Bošković", Zagreb

Poveznice na cjeloviti tekst rada:

doi jcp.aip.org

Citiraj ovu publikaciju:

Risović, Dubravko; Frka, Sanja; Kozarac, Zlatica
Application of Brewster angle microscopy and fractal analysis in investigations of compressibility of Langmuir monolayers // The Journal of chemical physics, 134 (2011), 2; 024701-1 doi:10.1063/1.3522646 (međunarodna recenzija, članak, znanstveni)
Risović, D., Frka, S. & Kozarac, Z. (2011) Application of Brewster angle microscopy and fractal analysis in investigations of compressibility of Langmuir monolayers. The Journal of chemical physics, 134 (2), 024701-1 doi:10.1063/1.3522646.
@article{article, author = {Risovi\'{c}, Dubravko and Frka, Sanja and Kozarac, Zlatica}, year = {2011}, pages = {024701-1-024701-9}, DOI = {10.1063/1.3522646}, keywords = {Langmuir monolayer, Brewster angle microscopy, fractal, compressibility, amphiphile}, journal = {The Journal of chemical physics}, doi = {10.1063/1.3522646}, volume = {134}, number = {2}, issn = {0021-9606}, title = {Application of Brewster angle microscopy and fractal analysis in investigations of compressibility of Langmuir monolayers}, keyword = {Langmuir monolayer, Brewster angle microscopy, fractal, compressibility, amphiphile} }
@article{article, author = {Risovi\'{c}, Dubravko and Frka, Sanja and Kozarac, Zlatica}, year = {2011}, pages = {024701-1-024701-9}, DOI = {10.1063/1.3522646}, keywords = {Langmuirov monoslojsloj, mikroskopija pod Brewsterovim kutem, fraktal, kompresibilnost, amfifilne molekule}, journal = {The Journal of chemical physics}, doi = {10.1063/1.3522646}, volume = {134}, number = {2}, issn = {0021-9606}, title = {Application of Brewster angle microscopy and fractal analysis in investigations of compressibility of Langmuir monolayers}, keyword = {Langmuirov monoslojsloj, mikroskopija pod Brewsterovim kutem, fraktal, kompresibilnost, amfifilne molekule} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati:





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