▎ 摘　　要

NOVELTY - Synthesizing (M1) a rare-earth dielectric-metal nanohybrid comprises preparing nanorod morphology of a rare-earth dielectric, preparing silver nitrate solutions of a specific concentration silver ion provider, placing 0.1 wt.% neodymium (III) oxide nanorods in 1 mM or 1M silver nitrate solution having 10 times dilution using Milli-Q water(RTM: Ultrapure water) as solvent, irradiating the mixture of neodymium(III) oxide nanoparticles and silver ions with sunlight for a predetermined time. USE - The methods are useful for: synthesizing a rare-earth dielectric-metal nanohybrid; synthesizing a rare-earth dielectric-metal nanohybrid trimer and tetramer; synthesizing tetramer; and generating ferroplasmons (all claimed), where the nanohybrid is used in optical and electronic materials, biomaterials, catalysis, sensing, coating, and energy storage. ADVANTAGE - The method: is environmentally friendly, biocompatible, economical user-friendly and facile; and is one pot self-assembly or self-organization nanoscale, with a highlight of it being a seedless and surfactant less synthesis strategy. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: ynthesizing (M2) a rare-earth dielectric-metal nanohybrid trimer and tetramer comprising placing neodymium (III) oxide nanorods in silver nitrate solution along with carbon dots (CD) and/or graphene oxide (GO) for composite nanohybrid formation, irradiating the mixture of neodymium (III) oxide, silver nitrate, CD and/or GO depending on trimer or tetramer formation; ynthesizing (M3) tetramer comprising exposing neodymium (III) oxide along with carbon dots, silver and graphene oxide nanohybrids, in presence of light; generating (M4) ferroplasmons, comprising anchoring silver nanoparticles on neodymium (III) oxide nanoparticles, in presence of light; and a trimer involving multiple nanocomposites, comprising neodymium(III) oxide, carbon dots and silver.