Fluorescence properties of Ag nanoparticles in water.
Ag nanoparticles in water phase have been synthesized employing the electro-exploding wire technique. A surface plasmon peak is observed at 400nm, characteristic of the Ag nanoparticles. A fluorescence emission peak is recorded at 300nm for excitation wavelengths in two different ranges 215-230 and 255-280nm. The position of the fluorescence peak remains fixed, irrespective of the excitation wavelength employed. These are assigned to electronic transition from different higher excited states to d levels of the Ag nanoparticles. In concomitant with these, there are two resonant absorptions at 5.76 and 4.59eV as evident from the fluorescence excitation spectra.
Siwach
Om Parkash
OP
School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India.
Sen
P
P
D005453:Fluorescence; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D012834:Silver / Q000737:chemistry*; D013053:Spectrophotometry; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
D014867:Water; D012834:Silver