Increased Control over Gold Colloid Adsorption on Substrates for Colloid Displacement Lithography
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Gold Colloid
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Characterization of colloidal dispersions microscopic solloidal behaviours determination of particle size flow behaviour thermodynamics of surfaces adsorption at interfaces electrically charged interfaces measuring surface charge and potential particle interaction and coagulation applications of colloid and surface science.
Surface charge
Characterization
Colloidal particle
Particle (ecology)
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................................................................................................. 418 11.1 Introduction ................................................................................ 418 11.2 Aim of the Work ......................................................................... 420 11.3 Experimental Part ....................................................................... 420 11.4 Results and Discussion .............................................................. 422 11.5 Conclusion ................................................................................. 426 Keywords .............................................................................................. 427 References ............................................................................................. 427ABSTRACTThis chapter presents the results of the development process for the preparation of micro and nano-sized polymer-colloid complexes (РСС) on the basis of the chitosan (СTZ) and the sodium salt of chitosan succinamid (SСTZ) with silver halide sols in aqueous media. Results of research of СTZ, sodium salt of SСTZ solutions and PСС of CTZ and SСTZ with colloidal particles of silver iodide influence on structurally-functional properties of erythrocytes' membranes on model of acidic hemolysis are presented. The comparative analysis of results convinces that СTZ, SСTZ solutions and disperse systems on the basis of PСС of СTZ and SСTZ with colloidal particles of the silver iodide are capable to modulate variously matrix properties of erythrocytes of blood.
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The dimension of nano-particles is close to the dimension of colloid particles. The dispersion system of nano-particles is colloid. The sedimentation rate of nano-particles dispersed in water is calculated, and it is shown that the sedimentation rate is very slow and the nano colloids have high stability on dynamics. Those conclusions are approved by tests. The influence of electric characters of the colloid and macromolecule was introduced. The results of the study maybe out of the image of most people and are useful to change their attitude of the kinetics stability of real nano particles colloid.
Sedimentation
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Colloidal particle
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Interface (matter)
Colloidal particle
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The fabrication of complex surface patterns by selective assembly of polymer latex particles onto laterally patterned silane layers on silicon dioxide substrates is described. For this purpose poly(butyl acrylate) (PBA) particles with a narrow size distribution and negative surface charge were synthesized by emulsion polymerization under monomer-starved conditions, which can form well defined colloid crystals. As a second class of colloid materials polystyrene (PS) latex particles with a corrugated surface and low overall surface charge were prepared under soap-free conditions. The laterally structured silane layers for the regioselective adsorption of the colloidal particles were fabricated by deposition of reactive silanes carrying different functionalities in combination with photolithographic patterning techniques. The particle patterns were prepared by colloid assembly from aqueous suspension due to specific interactions between the latex surfaces and the functionalities in the silane layers. The particles, silane surfaces, and assembly structures were characterized by optical microscopy, scanning force microscopy, and low voltage scanning electron microscopy.
Polystyrene
Particle deposition
Particle (ecology)
Emulsion polymerization
Surface Modification
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Nanoparticle colloid jet machining is an ultra smooth surface processing technique which utilizes surface chemical reaction between work surface atoms and nanoparticles in colloid to remove the work's surface atoms. The purpose of the paper is to investigate the effects of colloid rheological characters in nanoparticle colloid jet machining. The nature of colloid determines the flow behavior of suspensions and ultimately affects the removal characteristic of nanoparticle colloid jet machining. The article focuses on how these colloid rheological characters (in particular, the pH value, the concentration and the shear viscosity of colloidal suspension) affect the machining process. A series of corresponding removal experiments have been conducted to investigate the removal peculiarities with different process parameters. The removal experimental results show that the machining rate is regularly affected by the rheological characters of colloidal suspension.
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