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Forum Newcomer
Group: Forum Members
Last Login: 19 April 2011 18:25
Posts: 1,
Visits: 2
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Hello,
I am looking for some expert advice from the community. I am preparating a planar SERS surface using polycrystalline gold as a substrate. It will be roughened with oxidation-reduction cycles. I want to measure the sers substrate enhancement factor (SSEF) using pyridine as a reporter. I have done a lot of reading on the topic but I don't know the practical aspects.
SSEF = (ISERS/Nsurf)/(IRS/NVol
What I intend to do is to make an electrode with a mold and then polish the surface with alumina, followed by a roughening procedure. Now comes the reporter molecule pyridine. How can I attach that to the surface of the electrode? Back in the 80's they used a ultrahigh vacuum method to adsorb the pyridine. However, in more modern papers they make a pyridine solution and apply a potential to the electrode which causes the pyridine to adsorb. Is there some kind of accessory I need with the raman microscope to do this? How about if I placed my electrode in a teflon well and put a thin layer of pyridine solution over top of that? would it adsorb without applying a potential? I have more questions, but I'll start with this.
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