Research output: Contribution to journal › Article › peer-review
Polydopamine layer formation at the liquid – gas interface. / Milyaeva, O. Yu; Bykov, A. G.; Campbell, R. A.; Loglio, G.; Miller, R.; Noskov, B. A.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 579, 123637, 20.10.2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Polydopamine layer formation at the liquid – gas interface
AU - Milyaeva, O. Yu
AU - Bykov, A. G.
AU - Campbell, R. A.
AU - Loglio, G.
AU - Miller, R.
AU - Noskov, B. A.
PY - 2019/10/20
Y1 - 2019/10/20
N2 - The surface properties of a polydopamine layer at the air-water interface were studied by dilatational surface rheology, ellipsometry and Brewster angle microscopy (BAM). A significant increase of the dynamic surface elasticity was discovered when the concentration changed from 0.75 g/l to 2 g/l with the maximum value of about 60 mN/m at a concentration of 1 g/l. The obtained results indicate that the surface film consists of separate domains and the high surface elasticity is a consequence of the interactions between relatively rigid domains of the polymer film. This conclusion was confirmed by Brewster angle microscopy, which demonstrated different steps of the polydopamine film growth. Separate domains appeared at the first step while one can observe a continuous film close to equilibrium. An increase of the initial concentration led to faster polymerization and to the formation of a thicker film. The dynamic surface elasticity decreased in the concentration range from 2 g/l to 5 g/l when the thickness of the polymer film reached about 80 nm. In this case the film could be destroyed in the course of deformation. The cracks in the film resulted in a decrease of the dynamic surface elasticity.
AB - The surface properties of a polydopamine layer at the air-water interface were studied by dilatational surface rheology, ellipsometry and Brewster angle microscopy (BAM). A significant increase of the dynamic surface elasticity was discovered when the concentration changed from 0.75 g/l to 2 g/l with the maximum value of about 60 mN/m at a concentration of 1 g/l. The obtained results indicate that the surface film consists of separate domains and the high surface elasticity is a consequence of the interactions between relatively rigid domains of the polymer film. This conclusion was confirmed by Brewster angle microscopy, which demonstrated different steps of the polydopamine film growth. Separate domains appeared at the first step while one can observe a continuous film close to equilibrium. An increase of the initial concentration led to faster polymerization and to the formation of a thicker film. The dynamic surface elasticity decreased in the concentration range from 2 g/l to 5 g/l when the thickness of the polymer film reached about 80 nm. In this case the film could be destroyed in the course of deformation. The cracks in the film resulted in a decrease of the dynamic surface elasticity.
KW - Air-water interface
KW - BAM
KW - Dilatational surface visco-elasticity
KW - Polydopamine
KW - Polymerization
KW - Surface ellipsometry
KW - THIN-FILMS
KW - DEPOSITION
KW - DOPAMINE
KW - MEMBRANES
KW - SELF-POLYMERIZATION
KW - ALBUMIN
UR - http://www.scopus.com/inward/record.url?scp=85068795014&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2019.123637
DO - 10.1016/j.colsurfa.2019.123637
M3 - Article
AN - SCOPUS:85068795014
VL - 579
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
M1 - 123637
ER -
ID: 44991175