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Questions related from Brandon Chen
From what I can interpret, it means making a 8mM Ammonium chloride stock solution using Deionized water, then gradually adding ammonium hydroxide (28%, 14M) until the pH meter reads 9 or 10 pH. Is...
06 June 2017 3,490 2 View
Is there a method for transferring dispersed primary(~20nm) silica nanoparticles (NP) from ethanol to water without significant aggregation? If you happen to know a dispersed silica...
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What are practical bulk filtration methods for suspended nanoparticles under 100nm, preferably under 20 nm? By bulk, i mean filtering more than 1 ml at a time. Glass filters I have seen are mainly...
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I'm trying to image silica nanoparticles with a Scanning Electron Microscope. I think SEM samples are required to be conductive or sputter coated with a conductive layer of gold, but I'm not sure...
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Since many synthesis procedures utilize high purity ethanol, methanol, etc... as the solvent in synthesis procedures such as the Stober process, I assume there should be a couple of recovery...
03 March 2017 5,776 2 View
We have an issue with 20nm silica nanoparticle powder not dispersing well in a gel and forming large soft agglomerates instead of separating into primary particles. Is there a known method for...
02 February 2017 5,459 4 View
I am researching the mechanisms of Silica NP synthesis and methods to further reduce their size and dispersity in size. It can be mesoporous, fumed, or any other structure. A mention of the type...
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