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F. J. Arriagada

Researcher at Pennsylvania State University

Publications -  10
Citations -  1172

F. J. Arriagada is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Particle size & Microemulsion. The author has an hindex of 8, co-authored 9 publications receiving 1138 citations.

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Synthesis of nanosize silica in a nonionic water-in-oil microemulsion: Effects of the water/surfactant molar ratio and ammonia concentration

TL;DR: The effect of ammonia concentration on the region of existence of single-phase water-in-oil microemulsions has been investigated for the system polyoxyethylene (5) nonylphenyl ether (NP-5)/cyclohexane/ammonium hydroxide and shows a complex dependence of the particle size on the water-to-surfactant molar ratio (R) and on the concentration of ammonium Hydroxide.
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Preparation of SiO2 nanoparticles in a non-ionic reverse micellar system

TL;DR: In this paper, the preparation of nanosize, monodisperse silica particles by controlled hydrolysis of tetraethoxysilane (TEOS) in a non-ionic surfactant/ammonium hydroxide/cyclohexane reverse micellar system is described.
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Synthesis of Nanosize Silica in Aerosol OT Reverse Microemulsions

TL;DR: In this article, the authors used the fluorescence spectra of 1,3,6,8-pyrenetetrasulfonic acid (PTS) trapped in the water pools to demonstrate that free water molecules do not become available until the waterto-surfactant molar ratio (R) exceeds about 10.
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Controlled hydrolysis of tetraethoxysilane in a nonionic water-in-oil microemulsion : a statistical model of silica nucleation

TL;DR: In this paper, a statistical nucleation model based on the reverse micellar populations and the partition of tetraethoxysilane (TEOS) molecules was proposed to estimate the minimum number of hydrolyzed TEOS monomers required to form a stable nucleus.
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Phase and dispersion stability effects in the synthesis of silica nanoparticles in a non-ionic reverse microemulsion

TL;DR: In this article, a water-shell model was proposed to explain the reaction-promoted phase instability of tetraethoxysilane (TEOS) in cyclohexane-polyoxyethylene(5) nonylphenyl ether.