How do I correctly produce upconversion nanoparticles using the thermal decomposition method?

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%...

01 February 2017 5,367 2 View

How do you dissolve branched PEI of 25kD in water?

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...

10 November 2016 858 8 View

Does DMSO change color with heating and exposure to air?

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...

04 May 2016 1,592 4 View

How do you adjust pH of NaHCO3 buffer?

03 April 2016 9,101 5 View

How do you hold a thermocouple in a nitrogen-protected, high-temperature flask?

11 December 2015 6,795 1 View

Is a vacuum necessary for upconversion nanoparticle synthesis?

11 December 2015 8,748 12 View

Why are two inert gas inlets needed to maintain an inert atmosphere?

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...

11 December 2015 6,939 2 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View