## 1 Introduction  
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]. On the other hand, gold 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]. In this context, the laser ablation Au-Ag alloys in a liquid gives access to colloidal silver-gold alloy NPs with a uniform ultrastructure. For example, 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. It was shown recently that linear carbon chains (LCCs) containing _sp_-hybridization are good candidates to create the shell that prevents nanoparticles aggregation and oxidation [12, 13]. Despite the fact that long 1D carbon wires (carbine) were first obtained in the laboratory in the 1960s [14] and many methods of their preparation have been proposed to date [15, 16, 17, 18, 19, 20], there is still no method that allows one to obtain pure and stable phases of infinite one-dimensional carbon chains. It is generally accepted that carbyne is unstable due to the exothermic formation of crosslinks between adjacent atomic chains [21]. Significant progress in this area has been achieved with the discovery of polyynes--short sp1 hybridized linear chains with alternating single and triple bonds (-C\(\equiv\)C-C\(\equiv\)C-) [20]. Thus, today there is a sufficient number of studies describing methods of obtaining polyyns and cumulenes (=C=C=C), as well as methods of their identification. However, the massive synthesis of very long linear carbon chains continues to run into sticking points. However, a number of studies that have appeared in recent years, theoretically and experimentally describing new interesting properties of carbines [22; 23; 24], forced to reconsider some approaches to the creation of these materials and renewed interest in them. In particular, it was shown that one-dimensional carbon chains can have a strength, elastic modulus, and stiffness greater than any known material, including diamond, carbon nanotubes, and graphene, and make it possible to create new composite materials [22]. It is also assumed that carbines can be used to create field-effect transistors [25], and also show the possibility of possessing one-dimensional carbon chains with interesting magnetic [26] and electrical properties [27; 28]. Taking into account the difficulties caused by the synthesis of linear-chain carbon, it is quite understandable that much attention is currently paid to methods that make it possible to obtain sufficiently stable, albeit not very long structures. In particular, in the last 10-15 years, methods of LCC synthesis on the surface of metal nanoparticles (MeNPs) received widespread attention [12; 29; 30]. In addition to being able to produce stable LCCs, MeNPs@LCC structures also have a number of additional advantages. Thus, as mentioned before the formation of structures of the core@shell type prevents the agglomeration of nanoparticles in colloidal solutions for a long time, which significantly affects the possibilities of using MeNPs. At the same time, the nature of the chemical interaction between MeNPs and LCC remains unclear, in particular, the stability of LCC on the surface of Ag NPs in water is an unexpected manifestation of such interaction [31].