Abstract
The results of X-ray photoelectron spectra (XPS) characterization of the surface of Ag-Au colloidal nanoparticles (Ag-Au NPs), prepared by laser ablation in water before and after interaction with linear carbon chains (LCC), are presented. No additional features appear in high-energy resolved XPS core level spectra of Ag-Au NPs which indicates that surface is not oxidized. The measurements of XPS Ag 3d-spectrum of (Ag-Au)@LCC manifests the additional low-energy structure that is associated with the formation of Ag–C bonds. The charge transfer between Au atoms on the NPs surface and LCC was established. Additionally, some oxidation of the Ag atoms on the surface of (Ag-Au)@LCC is observed which arises during laser ablation in water. We assume that oxidative species will preferably interact with the areas outside the LCC instead of oxidizing the carbon chains which was confirmed by XPS C 1s spectra.
Highlights
In recent years, the interest in study of noble metal nanoparticles (NPs) has increased because of their unusual optical properties and chemical stability which is important for their use in optoelectronics [1,2], catalysis [3,4], biosensors [5], and medicine [6,7].Silver nanoparticles were found to be effective antibacterial substances and can be used as an additive in food [8] and various medical applications [9]
We present the results of X-ray photoelectron spectra (XPS) characterization of Ag atoms on the surface of (Ag-Au) and (AgAu)@linear carbon chains (LCC) nanoparticles prepared by pulse laser ablation (PLA) in water of great interest for some technological applications in which the control of surface functionalization is fundamental to improve material properties
The use of two successive processes during ablation, that is the formation of noble metal nanoparticles and subsequent carbon deposition, allows to obtain noble metal nanoparticles in a homogeneous and ultrathin carbon layer
Summary
The interest in study of noble metal nanoparticles (NPs) has increased because of their unusual optical properties and chemical stability which is important for their use in optoelectronics [1,2], catalysis [3,4], biosensors [5], and medicine [6,7].Silver nanoparticles were found to be effective antibacterial substances and can be used as an additive in food [8] and various medical applications [9]. NPs are used in microscopy and cancer therapy [10] because of their optical properties. Combining these unique properties in doped nanoparticles of both elements thereby opens up new areas of interest in research and treatment [11]. The use of silver NPs in combination with gold NPs could open new possibilities for the connection of antibacterial silver nanoparticles to various biomolecules via covalent bonding to gold atoms. To prevent the nanoparticles aggregation and oxidation, the stabilizing species that bind to the nanoparticle surface are crucial
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
