PROCESS FOR SYNTHESIS OF SILVER NANO FIBRES COATED WITH LOW-MELTING-POINT METAL NANO PARTICLES

• Main Authors: CSEH LILIANA, BĂNICĂ RADU NICOLAE, KELLENBERGER ANDREA ROZALIA, URSU DANIEL HORAŢIU, LINUL PETRICĂ ANDREI, VASZILCSIN NICOLAE
• Format: Patent
• Language: English; Romanian
• Published: 27.04.2018
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; PERFORMING OPERATIONS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING

The invention relates to a process for the synthesis of silver nano fibres coated with low-melting-point metal nano particles, meant to be used in carrying out conductive tracks on carriers, in solar cells or optoelectronic devices construction. According to the invention, the process comprises a first stage in which silver nano fibres with diameters of 100...500 nm and average lengths over 20 μm are carried out using the solvothermal technique, followed by a second stage in which the so synthesized silver nano fibres are directly coated with quasi-spherical indium or tin nano particles of 2...50 nm, at temperatures of 25...90°C, to result in silver nano fibres functionalized with indium or tin nano particles which permit subsequent sintering at low temperatures. Invenţia se referă la un procedeu de sinteză a nanofirelor de argint acoperite cu nanoparticule metalice cu punct de topire scăzut, utilizate pentru realizarea de trasee conductoare pe suporturi în construcţia celulelor solare sau a dispozitivelor optoelectronice. Procedeul, conform invenţiei, constă în aceea că, într-o primă etapă, se obţin nanofirele de argint cu diametre de 100...500 nm şi lungimi medii de peste 20 μm, prin tehnica solvotermală, după care, într-o a doua etapă, pe nanofirele de argint sintetizate se depun direct nanoparticule cvasisferice de indiu sau staniu cu dimensiuni de 2...50 nm la temperaturi de 25...90°C, rezultând nanofire de argint funcţionalizate cu nanoparticule de indiu sau staniu care permit sinterizarea ulterioară la temperaturi joase.