Design, synthesis and photophysical study of fluorophore modified noble metal nanoparticles

Variations in electronic states of coumarin hexanethiolate-labeled i-Au25 and bi-Au25 clusters

“…The absorbance spectra of gold nanoparticles that display quantum confinement, electronic transitions between the ligand and the gold core in the higher frequency regions of the electromagnetic spectrum are observed. [4][5][6] The lower frequency transitions that are associated with the gold-gold interactions are seen in the near infrared (NIR) region. [1,7] The crystal structures of icosahedral and bi-icosahedral structures have generated an interest in the last decade.…”