Insights into the growth of nanoparticles in liquid polyol by thermal annealing.

Adrien Chauvin,Anastasiya Sergievskaya,Cinthia Antunes Corrêa,David Cornil,Jozef Vesely,Jérôme Cornil,Anna Fucikova,Stephanos Konstantinidis,Milan Dopita

doi:10.1039/d1na00222h

Abstract

We report on the growth of metal- and metal-oxide based nanoparticles (NPs) in heated polyol solutions. For this purpose, NPs are produced by the sputtering of a silver, gold, or a copper target to produce either silver, gold, or copper oxide NPs in pentaerythritol ethoxylate (PEEL) which has been annealed up to 200 °C. The objective of the annealing step is the fine modulation of their size. Thus, the evolution of the NP size and shape after thermal annealing is explained according to collision/coalescence kinetics and the affinity between the metal-/metal-oxide and PEEL molecule. Moreover, highlights of few phenomena arising from the annealing step are described such as (i) the reduction of copper oxide into copper by the polyol process and (ii) the effective formation of carbon dots after annealing at 200 °C.

Highlights

Owing to the progress made in nanoscience and nanotechnology, the bottom-up approach involving the assembly and growth of NPs has been a topic of both scienti c and technological importance
In spite of the negative enthalpy of silver oxide formation, a previous study reports the formation of metallic silver NPs a er sputtering onto pentaerythritol ethoxylate (PEEL).[25]
A previous study shows the formation of copper oxide NPs a er sputtering of copper onto liquids a er few days of Surface Au Ag Cu Cu2O

Summary

Introduction

Owing to the progress made in nanoscience and nanotechnology, the bottom-up approach involving the assembly and growth of NPs has been a topic of both scienti c and technological importance.

Results

Conclusion