I recently synthesized silver nanoparticles from the reduction of Silver Nitrate by ethylene glycol, using polyvinylpyrrolindone (PVP) as a capping agent. The mixture turned a yellow color. I confirmed the existance of silver nanoparticles by UV/Vis, getting a surface plasmon resonance peak at ~430nm.
I sprayed the colloidial silver onto a glass slide, then vacuum annealed the slide for an hour. Then I tried to measure conductivity, and got no signal. I sprayed the slide twice more, and then annealed after each spray, and still no conductivity. The glass slide is an orange-yellow color. Why aren't the silver nanoparticles conducting electricity?
Thanks So Much!