fig7

Figure 7. Applications of copper sulfur compounds in biosensing. (A) The TEM characterization of mCu_2-xS@SiO₂@Y₂O₃:Yb³⁺/Er³⁺ and the application of fingerprint recognition in (B)^[103]; (C) and (D) TEM images of hydrophobic Cu₇S₄ NPs and amphiphilic Cu₇S₄ NCs included fabrication strategy for Cu₇S₄ NCs and photothermal effects of Cu₇S₄ NCs under a given power density versus the irradiation time, and scheme for photothermal imaging of fingerprints. (The photothermal tests were conducted on the thin film of Cu₇S₄ NC powder with excitation at 808 nm); (E) the photothermal latent fingerprints imaging method^[104]. (A)-(B): Copyright © American Chemical Society 2017; (C)-(E): Copyright © American Chemical Society 2015.