Hydrophilic Cu_2−xSe/reduced graphene oxide nanocomposites with tunable plasmonic properties and their applications in cellular dark-field microscopic imaging

Abstract

We report a facile and green approach to fabricate Cu2−xSe/rGO nanocomposites at room temperature, with tunable plasmonic properties as well as favorable biocompatibility, and exploit them for cell imaging in vitro.

Thermoelectric Properties of Indium(III)‐Doped Copper Antimony Selenide Thin Films Deposited Using a Microwave‐Assisted Technique

“…Thecore-level spectrum of Cu presented in Figure 5c shows two peaks of Cu 2p at bindinge nergies (BE) of 932.6 and 952.3 eV assigned to Cu 2p 3/2 and Cu 2p 1/2 ,r espectively, which confirms the presence of Cu + + in the thin film sample. [39] However, two peaks locateda tB E = 934.3 and 953.7 eV assigned to Cu 2p 3/2 and Cu 2p 1/2 imply the presence of Cu 2+ + in the sample,a nd two satellites hake-up peaks were observed at BE = 942 and 962 eV,w hichc onfirms the presence of Cu 2+ + in the thin film. [40] Thes ame behaviouro fC uh as been reported by others.…”

“…The valence states of Cu, Sb, In and Se in the representative Cu 3 (Sb 0.94 In 0.06 )Se 4 thin film were determined by X‐ray photoelectron spectroscopy (XPS; Figure ). The core‐level spectrum of Cu presented in Figure c shows two peaks of Cu 2p at binding energies (BE) of 932.6 and 952.3 eV assigned to Cu 2p 3/2 and Cu 2p 1/2 , respectively, which confirms the presence of Cu + in the thin film sample . However, two peaks located at BE=934.3 and 953.7 eV assigned to Cu 2p 3/2 and Cu 2p 1/2 imply the presence of Cu 2+ in the sample, and two satellite shake‐up peaks were observed at BE=942 and 962 eV, which confirms the presence of Cu 2+ in the thin film .…”

Synergetic Catalytic Effect of Cu2–xSe Nanoparticles and Reduced Graphene Oxide Coembedded in Electrospun Nanofibers for the Reduction of a Typical Refractory Organic Compound

“…27,40 The main XPS peak of Se 3d at 54.4 eV is due to Se 2− , and the peak at 58.7 eV is on behalf of the oxidation state of Se ( Figure 3D). 28 It is verified that Cu + and Se 2− in Cu 2−x Se might be partially oxidized upon annealing. At the moment, the elemental compositions of Cu 2−x Se NPs and Cu 2−x Se/rGO/PVP composite nanofibrous mats before and after were also determined by EDX, which also confirmed the presence of Cu, Se, C, and O elements ( Figure S1 in the SI).…”

Plasmonic doped semiconductor nanocrystals: Properties, fabrication, applications and perspectives

“…[28,42] Even higher photothermal transduction efficiency was shown for nano-heterostructures combining copper chalcogenides with gold. [43,322,[335][336][337] For example, deep tissue photothermal therapy was performed with Au-Cu 9 S 5 core-shell nanoparticles by exciting into the second NIR window with a 1064 nm laser. [43] Combining such therapeutic agents with non-invasive, sensitive and accurate molecular imaging techniques for early diagnosis of diseases represents a novel and powerful approach.…”