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Questions related from Evaline Tsai
I understand that the radius of the sphere of action in the Perrin model is defined as the distance where there's 50% quenching. But what does it say about quenching efficiency / ability when one...
03 March 2018 9,054 0 View
I have tried several times to synthesize upconversion nanoparticles using a thermal decomposition method but have not yet been successful with my synthesis. I dissolve lanthanide oxides in 50%...
02 February 2017 5,410 2 View
I am trying to dissolve 25kD branched PEI (0.4 g) in water (10 mL). So far I have been magnetically stirring at room temperature until the solution is clear. Is this sufficient? I saw on other...
11 November 2016 919 8 View
I am using DMSO as a solvent while coating nanoparticles with PEI. I maintain the solution at 95 C for 6 h, and after a few hours I notice that the solution turns from clear to brown. The reaction...
05 May 2016 1,640 4 View
I am following a procedure that requires a 100 mM NaHCO3 buffer, pH 8.5. I understand that one way to make the buffer would be to dissolve 84 mg NaHCO3 in 10 ml of deionized water. Will this...
04 April 2016 9,201 5 View
I am looking at synthesis methods for upconversion nanoparticles. In some journal articles I've read, the authors mention the use of a vacuum to remove water and oxygen during the synthesis...
12 December 2015 8,793 12 View
I have to heat my round bottom flask to >300 C for my reaction. At the same time, the reaction has to be protected under nitrogen atmosphere. Is there a thermocouple joint adapter that can hold...
12 December 2015 6,827 1 View
In the book The Manipulation of Air-Sensitive Compounds by D.F. Shriver and M.A. Drezdzon, they give a inert atmosphere setup (figure attached) where inert gas flows from one inlet through the...
12 December 2015 6,999 2 View
