On the nanostructure of polymer layers formed by adsorption from binary and ternary solutions on a solid SiO2: a combined adsorption and atomic force microscopy (AFM) study

Lipatov, Yu.S.; Bliznyuk, Valery N.; Todosiychuk, T. T.; Chornaya, Valentine; Katumenu, R. K.; Konovalyuk, V. D.

doi:10.1007/s00396-005-1460-9

Cited by 6 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The distribution of the sizes and the shape of the domains depend on the original ratio of the components as is evident from Figure . Three different kinds of domain structures have been observed: island-type structures mostly seen in C > C* films (with the exception of the sample prepared from the PS/PBMA = 2:1 binary solution at high concentration), interpenetrated domain structures for the C < C* regime, which are represented in Figure , and lamella type structures with an alternation of the PS and PBMA domains, which can be found mainly for the 1:1 ratio of the components and have been described in our previous publication 2 Typical morphology of mixed adsorption films (PS/PBMA = 1:3) revealed by AFM for low concentration (a−c) and high concentration (d−f) adsorption regimes.…”

Section: Resultsmentioning

confidence: 72%

“…It should be mentioned that the adsorbed layers are not uniform in thickness, and therefore, the average values of the thickness are provided in Table . The difference between the thicknesses of the layers can be also related to the effect of incompatibility of the polymer components, which implies that the surface of the adsorbent has a mosaic structure with an alternation of regions formed by each polymer component 8 Dependence of the structural parameters of adsorbed films (the average film thickness and rms roughness) on the ratio of polymer components (PS/PBMA) in a mixed polymer solution. …”

Section: Resultsmentioning

confidence: 99%

“…In a typical adsorption procedure (case 1 or 2), a piece of cleaned and hydrophilic silicon substrate was put (with the working surface up) on the bottom of a beaker filled with a polymer solution of a desirable concentration and polymer−polymer ratio for 4−6 h to ensure adsorption equilibrium . The substrates were then quickly removed from the solution and allowed to dry naturally in a horizontal position to remove the solvent (case 1), or rinsed with pure solvent to remove polymer chains not tightly attached to the solid surface during adsorption (case 2) . It should be stressed that in case 2 the substrate was transferred from the polymer solution to a beaker with pure solvent instantly (i.e., in such a way that the polymer solution layer trapped in the meniscus has not been dried within this procedure, but only after washing of the adsorbed layer with the pure solvent).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Atomic Force and Ultrasonic Force Microscopy Investigation of Adsorbed Layers Formed by Two Incompatible Polymers: Polystyrene and Poly(butyl methacrylate)

Lipatov

Özdemir

et al. 2007

Langmuir

Self Cite

View full text Add to dashboard Cite

Atomic force microscopy (AFM) and ultrasonic force microscopy (UFM) have been used to study the properties of adsorption layers formed by two incompatible polymers, polystyrene and poly(butyl methacrylate), in the course of simultaneous adsorption on the surface of silica (naturally oxidized surface of a silicon wafer). The adsorption was performed from solutions containing both of the components in a common solvent (carbon tetrachloride) in dilute and semidilute concentration regimes. It was discovered that in both cases the structure of adsorption layers has a complex mosaic structure, the details of which depend on solution composition, on the solution concentration regime, and on the ratio of the components in the adsorption layer. The observed structural inhomogeneity on the length scale of approximately 200-500 nm (distribution of segment density revealed by UFM) appears as result of thermodynamic incompatibility in the system and is conditioned by changes in the conformation states of the adsorbed macromolecules in the route of competitive adsorption of the components. The adsorbed polymer films with thicknesses of approximately 20-500 nm appeared to have fractal properties and could be characterized with fractal dimensions dependent on the ratio of the components at the interface and the adsorption conditions.

show abstract

Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Atomic Force and Ultrasonic Force Microscopy Investigation of Adsorbed Layers Formed by Two Incompatible Polymers: Polystyrene and Poly(butyl methacrylate)

Lipatov

Özdemir

et al. 2007

Langmuir

Self Cite

View full text Add to dashboard Cite

show abstract

“…The conductivity was evaluated as σ = LI / VA , where L is the distance of the silver electrodes, I the measured current, V the applied potential difference and A the cross‐sectional area of the sample, which was calculated as the film thickness multiplied by the width of the film. Polymer film thicknesses were measured using AFM in accordance with a previously described routine19 and their lateral dimensions were measured using a calibrated optical microscope with Image Analyzer software.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and characterization of polyaniline derivative and silver nanoparticle composites

Neelgund

Hrehorova

Joyce

et al. 2008

Polymer International

View full text Add to dashboard Cite

BACKGROUND: There has been a recent surge of interest in the synthesis and applications of electroactive polymers with incorporated metal nanoparticles. These hybrid systems are expected to display synergistic properties between the conjugated polymers and the metal nanoparticles, making them potential candidates for applications in sensors and electronic devices. RESULTS:Composites of polyaniline derivatives -polyaniline, poly(2,5-dimethoxyaniline) and poly(aniline-2,5dimethoxyaniline) -and silver nanoparticles were prepared through simultaneous polymerization of aniline derivative and reduction of AgNO 3 in the presence of poly(styrene sulfonic acid) (PSS). We used AgNO 3 as one of the initial components (1) to form the silver nanoparticles and (2) as an oxidizing agent for initiation of the polymerization reaction. UV-visible spectra of the synthesized nanocomposites reveal the synchronized formation of silver nanoparticles and polymer matrix. The morphology of the silver nanoparticles and degree of their dispersion in the nanocomposites were characterized by transmission electron microscopy. Thermogravimetric analysis and differential scanning calorimetry results indicate an enhancement of the thermal stability of the nanocomposites compared to the pure polymers. The electrical conductivity of the nanocomposites is in the range 10 −4 to 10 −2 S cm −1 .CONCLUSION: A single-step process for the synthesis of silver nanoparticle-polyaniline derivative nanocomposites doped with PSS has been demonstrated. The approach in which silver nanoparticles are formed simultaneously during the polymerization process results in a good dispersion of the nanoparticles in the conductive polymer matrix.

show abstract

“…21 From another aspect, a competitive adsorption of the blends of non-interacting (immiscible) polymers on the solid/liquid interfaces was studied. 22,23 Based on a profound analogy between both the processes of macromolecular connection in solutions and of polymer adsorption on a solid/liquid interface, our group has begun for the first time the detailed investigations of competitive interactions in ternary polymer-colloidal systems containing hydrogen bonded Inter-or IntraPC and also mono-or polydispersed colloidal particles. One of the driving forces of these investigations was to explain the effect of a principally higher flocculating capability of both types of polycomplexes compared to individual components and some known flocculating agents, that was established in two real polydispersed colloidal systems such as kaolinite clay/water and coagulant (aluminum sulfate)/natural water suspensions.…”

Section: Introductionmentioning

confidence: 99%

Inter- And Intramolecular Polycomplexes in Polydispersed Colloidal Systems

Zheltonozhskaya

Permyakova

Eremenko

2009

Hydrogen-Bonded Interpolymer Complexes

View full text Add to dashboard Cite

Problems of stability in polymer-colloidal systems are discussed from the viewpoints of classical colloidal chemistry, macromolecular chemistry and statistical physics. The special situation in the systems containing polydispersed colloidal particles is highlighted. The behavior of the InterPC (PSMA+PEO) composed of poly(styrene-altmaleic acid) and poly(ethylene oxide), and also of the IntraPC (PVAPAAm) formed in the poly(vinyl alcohol)-graft-polyacrylamide copolymers in mono-and polydispersed silica/water suspensions is considered in order to explain the fact of a principally higher flocculating capability of polycomplexes as compared with individual polymer components. The approaches of colloidal and macromolecular chemistry are used in conjunction in these studies. The development of complicated non-equilibrium competitive processes in the ternary systems containing chemically complementary polymer components and polydispersed colloidal particles is demonstrated. The existence of an additional thermodynamic factor of attraction between large micrometer-scale particles covered by adsorption layers of polycomplexes and between triple polymer-colloidal complexes formed by both polymer components and nanoparticles is shown.

show abstract

On the nanostructure of polymer layers formed by adsorption from binary and ternary solutions on a solid SiO2: a combined adsorption and atomic force microscopy (AFM) study

Cited by 6 publications

References 9 publications

Atomic Force and Ultrasonic Force Microscopy Investigation of Adsorbed Layers Formed by Two Incompatible Polymers: Polystyrene and Poly(butyl methacrylate)

Atomic Force and Ultrasonic Force Microscopy Investigation of Adsorbed Layers Formed by Two Incompatible Polymers: Polystyrene and Poly(butyl methacrylate)

Synthesis and characterization of polyaniline derivative and silver nanoparticle composites

Inter- And Intramolecular Polycomplexes in Polydispersed Colloidal Systems

Contact Info

Product

Resources

About