Jun 15, 2006 · We found a strong reduction of the isotropic hyperfine coupling constant, aiso (Au), for adsorbed gold compared to the free atom; this reduction, which is about 45% for terrace sites, is more pronounced when Au interacts with low-coordinated sites like steps, edges and corners where it is about 60%.

Aug 1, 2019 · The inherent fluorescence of Au nanoclusters allows live cell imaging. Cancer cells secrete more vascular osmotic factors than normal cells, resulting in tumor cells having enhanced vascular permeability and retention (EPR) compared to normal cells. The EPR effect allows large molecules to more easily penetrate tumor cells.

Jul 12, 2002 · An EPR study of a place-exchange reaction of a diradical disulfide with butanethiol-protected Au nanoparticles showed that the two branches of the disulfide molecule do not adsorb adjacent to each other on the Au surface.

Apr 22, 2022 · According to CW-EPR results, the Au nano assemblies within BSA-AuNCs are estimated to contain 6–8 Au units per fluorescent cluster. Direct observation of BSA-AuNCs by STEM and HR-TEM techniques confirms the presence of such diameters of …

We used a series of atomically precise Au 24 M (SR) 18 clusters, with different R groups and doping metal atoms M. Upon nanosecond photoexcitation of the cluster, 1 O 2 was efficiently generated. Detection was carried out by time-resolved …

Nov 15, 2024 · Au-Cu dual-single-atom sites exhibit a synergistic effect for CO 2 photoreduction. Cu single-atom sites stabilize *CO intermediate and promote C−C coupling. Au single atoms accelerate the charge transfer rate and inhibit the recombination. Concentrated light irradiation reduces the apparent activation energy of CO2RR.

Apr 22, 2022 · Bovine serum albumin-embedded Au nanoclusters (BSA-AuNCs) are thoroughly probed by continuous wave electron paramagnetic resonance (CW-EPR), light-induced EPR (LEPR), and sequences of microscopic investigations performed via high-resolution transmission electron microscopy (HR-TEM), scanning transmission electron …

Apr 22, 2022 · Bovine serum albumin-embedded Au nanoclusters (BSA-AuNCs) are thoroughly probed by continuous wave electron paramagnetic resonance (CW-EPR), light-induced EPR (LEPR), and sequences of...

Apr 22, 2022 · Bovine serum albumin-embedded Au nanoclusters (BSA-AuNCs) are thoroughly probed by continuous wave electron paramagnetic resonance (CW-EPR), light-induced EPR (LEPR), and sequences of microscopic investigations performed via high-resolution transmission electron microscopy (HR-TEM), scanning transmi …

Apr 22, 2022 · The authors present an interesting EPR study of Au nanocluster-bovine serum albumin (AuBSA) materials that show, for the first time, that both Au^+2 and Au^0 oxidation states are present. The results testify to the utility of EPR for characterizing Au-organic materials with small AuNCs that can be damaged by electron imaging.