Irfan Arif

6 Questions 10 Answers 0 Followers

Questions related from Irfan Arif

How to add MCM 41 SiO2 support on pre-syntheiszed Au-Ag bimetallic nanoparticles?

I have synthesized Au-Ag alloy NPs in colloidal form by reducing HAuCl4 and AgNO3 using NABH4 with ATP as capping agent. I want to add a support, Silica MCM-41 to the prepared NPs. What should be...

06 June 2018 4,598 6 View

What should be the correct strategy of handling and storage of pure Ag, pure Au and AuAg alloy nanoparticles (NPs) in order to avoid any color change?

I have synthesized pure Ag, pure Au and AuAg alloy ( for e.g. Au25Ag75) nanoparticles (NPs). Solvent used is milli-Q water. The NPs are presently in colloidal form. I have observed a color change...

06 June 2018 2,100 4 View

How to precipate Au-Ag bimetallic nanoparticles synthesized in milli-pore water?

I have synthesized Au-Ag bimetallic NPs using millipore water (100 ml) as solvent and ATP as a capping agent. The precursors used for metals ar HAuCl4 and AgNO3. Since the ions of these two metals...

06 June 2018 6,641 2 View

How to anneal Au-Ag bimetallic catalyst? Is their any role of catalyst support in annealing process?

I have synthesized Au-Ag alloy nanoparticle without any catalyst support. Currently the alloy is in suspension form. I need to anneal the sample at higher temperatures. Can you suggest how the...

05 May 2018 4,660 5 View

Does TEM technique give only bulk composition in a nanoparticle?

I want to measure only the bulk composition of a bimetallic(Au-Ag) nanoparticle excluding its surface composition. Can I use TEM for that?

03 March 2018 2,480 4 View

Can STEM EDX quantitavely determine the surface and bulk composition separately?

I have synthesised Au-Ag nanoparticles. I want to determine the composition of Au & Ag separately in the bulk and at the surface. How effective would it be to use STEM EDX for this?

03 March 2018 9,261 0 View