Hi, I recommend using gold to take advantage of the strong Au-S bond. This is the structure I have been using. Regards, Leyla On 5/13/07, aniruddh@iitg.ernet.inwrote: > > Hello, > > I was looking for the best material to use for DNA Hybridisation sensing > amongst the following------ > > Si(single-crystal), > SiO2, > Silicon Nitrite, > Gold film, > Nickel, > Chromium, > Silver, > Silane groups(Amino and PEG). > > If somebody has some information along with reasoning,please reply back.