Synthesis and Properties Study of Bi-ligand Stabilized Gold Nanoclusters with Enhanced NIR-Ⅱ Emission
Long wavelength emission enhanced bi-ligand stabilized gold nanoclusters (MHA/MEHE-Au NCs) were syn-thesized by doping mercaptohexyl alcohol into mercaptohexanoic acid. The fluorescence emission intensity of the synthe-sized second near-infrared gold nanoclusters was significantly enhanced, which was 1.74 times as stronge as the un-doped gold nanoclusters (MHA-Au NCs) at 1000～1400 nm and 3.29 times at 1200～1400 nm. It was found that the material was a spherical nanoparticle with good dispersion in water and a particle size of 2.45 nm. The penetration depth of MHA/MEHE-Au NCs in simulated tissue was significantly increased compared with MHA-Au NCs. Therefore, they have the potential to be used in vivo to obtain high-resolution imaging of deep tissues.
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