Photoluminescence properties of sonochemically synthesized gold nanoparticles for DNA biosensing.
The electronic interactions of sonochemically synthesized gold (Au) nanoparticles with AT- and GC-DNA were studied by measuring photoluminescence (PL) spectral properties and the inherent PL images of the Au nanoparticles incorporated with the single DNA molecules using a laser scanning confocal microscope. The Au-nanoparticles incorporated AT-DNA and GC-DNA exhibit confocal PL image. These results suggest a Lewis acid (Au)-Lewis base (N- or O-groups of DNA) type of interaction between Au nanoparticles and DNA.
Anandan
Sambandam
S
Nanomaterials & Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Trichy 620015, Tamil Nadu, India. sanand@nitt.edu
Oh
Seung-Do
SD
Yoon
Minjoong
M
Ashokkumar
Muthupandian
M
D015374:Biosensing Techniques; D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008163:Luminescent Measurements; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010777:Photochemistry
D006046:Gold; D004247:DNA