Ligand effects on the air stability of coppernanoparticles obtained from organometallic synthesis

Abstract

Low-polydispersity copper nanoparticles (NPs) are prepared through hydrogenolysis of various organometallic copper precursors in an organic medium at moderate temperature. The effects of the precursor composition and the nature of the additional surfactants on the structure and stability of NPs are characterized by TEM and UV-Vis analysis. The improved air stability of copper NPs originating from amidinate copper and stabilized by an alkylamine compound (hexadecylamine) is evidenced and compared with the effect of a long chain carboxylic acid (oleic acid).

Direct Synthesis of N‐Heterocyclic Carbene‐Stabilized Copper Nanoparticles from an N‐Heterocyclic Carbene–Borane

“…Thus, we started our investigations with an NHC–borane with n ‐C 12 H 25 aliphatic chains on the N atoms of the NHC core. [CuMes] n was previously used for the synthesis of colloidal Cu NPs . In this study, copper NPs were generated under inert atmosphere from a solution of [CuMes] n in toluene, to which NHC–BH 3 was added (1–5 equiv).…”

“…[6,11,13,21] Thus, we started our investigations with an NHC-borane with n-C 12 H 25 aliphatic chains on the Na toms of the NHCc ore. [CuMes] n was previously used for the synthesis of colloidal Cu NPs. [22][23][24][25][26][27] In this study, copperN Ps were generated under inert atmosphere from asolution of [CuMes] n in toluene,t ow hich NHC-BH 3 wasa dded (1-5 equiv).T he solution wash eatedtoreflux in toluenef or 2.5hto give ad eepred suspension( Scheme 1, right).I nc ontact with air, thef inal reds uspensiono fNPsw as quicklyo xidizeda nd took on ab luec olor.…”

Facile Synthesis of Oxidation‐Resistant Copper Nanowires toward Solution‐Processable, Flexible, Foldable, and Free‐Standing Electrodes

“…However, this type of Cu NWs relatively sustained the electrical conductivity for a long period of time, although it was also slightly degraded. The strongly capped molecules by amine and bromide and a thin oxide layer (below 1nm) could reduce the surface energy and delay the further oxidation . In this reason, this type of Cu NWs had an enough potential to be used for conductive ink materials with their outstanding oxidation resistance.…”

Copper nanoparticle incorporated plasmonic organic bulk-heterojunction solar cells

“…On the other hand, LSPRs were also observed with Cu NPs in the visible wavelength region, although they were weaker than those induced by Au and Ag NPs. [16][17][18] Thus, Cu NPs are especially suited for use in organic solar cells, since Cu is much cheaper than precious metals such as Au and Ag. Therefore, the study of plasmonic effects due to Cu NPs in organic solar cells is important for finding a cost-effective solution for enhancing PCE for commercial production.…”

“…1(b)), similar to previous studies. [16][17][18] We investigated the morphology of the PEDOT:PSS layers to determine how Cu NPs were incorporated. The atomic force microscopy (AFM) measurements showed no clear difference between the PEDOT:PSS layers with and without Cu NPs (see Figs.…”