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Showing 1 to 11 of 11 for “"colloidal chemistry"”.
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Fabrication and applications of in-fiber semiconductor and metal microspheres
… or via bottom-up approaches, such as colloidal chemistry. Top-down approaches often generate a wide particle size distribution, while bottom up approaches often involve toxic and sometimes rather expensive precursors to generate the particles. By utilizing a phenomenon known as axial …
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Silicon nanoparticle sysnthesis through thermal catalytic pyrolysis
… or etching, and bottom-up synthesis such as colloidal chemistry and gas phase pyrolysis. The chemical processes in the latter are generally equivalent to those in the chemical vapour deposition (CVD) of compact films. Due to its simplicity and the relatively straight-forward construction of …
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Synthesis and Characterization of Silica Coated CdSe/CdS Core/Shell Quantum Dots
A great deal of interest has been dawn on the colloidal chemistry based semiconductor nanocrysallites, also known as quantum dots (QDs). Because of the strong quantum confinement, quantum dots have unique size-dependent optical properties, which are much more superior to the conventional organic …
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Investigating the redispersibility of calcium carbonate
… and pH changes were made to improve the colloidal stability. The commercial product contained an unknown organic dispersant which was removed by washing and zeta potential results were measured. The rheological properties of the various samples were investigated and a sample selection was …
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Geležies dalelių sintezė vandens ir alyvos terpėse ir jų taikymas tribosistemose /
… of obtained particles are described in colloidal chemistry terms: by electrochemical aspects of NaBH4 and LiBEt3H, used surfactants steric stabilization factor. The transmetallization of Fe by copper was investigated as well. Cementation of Fe occurs as long as copper ions are present in …
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Light and Heat Selective Polymer Nanocomposite Films for Sustainable Greenhouses
… in greenhouses. The QDs, synthesized by colloidal chemistry using a single-molecular precursor method, along with commercial SA particles were integrated into EVA films by melt mixing the particles with the plastic in a mini-compounder. The resulting blends were extruded and pressed into …
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Stabilization of Magnetite Nanofluid and its Transport in Porous Media
… high surface energy. The principles of surface/colloidal chemistry and electric double layer are applied for the selection of surfactants to achieve stabilized nanofluid dispersions. For nanoparticle applications in subsurface, the salinity of reservoir water needs to be considered. The …
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Shape-Engineering Substrate-Based Plasmonic Nanomaterials
… This massive effort has resulted in a maturing colloidal chemistry containing an extensive collection of morphologies with compositions nearly spanning the entire transition of the periodic table. While colloidal nanoparticles have opened the door to promising applications in fields such as …
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The Colloidal Stabilization of Quantum Dots: Towards Manufacturable, Efficient Solution-Processed Solar Cells
Understanding colloidal stabilization can influence the design of optoelectronic devices and enable improvements to their performance and stability. For photovoltaics, important characteristics of the active layer material are high conductivity along with a minimum of recombination centers. In …
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Near-Net Shaping and Additive Manufacturing of Ultra-High Temperature Ceramics via Colloidal Processing
Ceramic colloidal processing routes such as slip casting, gelcasting and direct ink writing provide valuable insight into the role of interaction forces between particles, solvents, and polymeric additives in the rheology, particle packing, and strength of a ceramic green body. For …
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Physikalische Hydrogele auf Polyurethan-Basis
Physical hydrogels have gained recent attention as cell substrates, since viscoelasticity or stress relaxation is a powerful parameter in mechanotransduction, which has long been neglected. We designed multi-functional polyurethanes to form physical hydrogels via a unique tunable gelation …