TY - JOUR

T1 - Ligand-Assisted self-assembly of colloidal Ag2S nanoparticles

AU - Rempel, Svetlana

AU - Vorontsova, Ekaterina

AU - Kuznetsova, Yulia v.

AU - Rempel, Andrey a.

N1 - This work was supported by the Russian Science Foundation (project 19–73-20012-П, https://rscf.ru/en/project/19–73-20012/ ) and was performed at the Institute of Solid State Chemistry UB RAS, using Physics Technological Infrastructural Complex of the Institute of Metal Physics UB RAS.

PY - 2024/4/1

Y1 - 2024/4/1

N2 - Over the last decade, great attention of researchers has been focused on nanoscale self-assembly due to increasingly technology-relevant applications. Pattern formation by colloidal droplet evaporation is one of the fascinating subjects to study. A deep understanding of physical and chemical processes of the deposited structure formation allows the development of bioprinting methods, nanoarchitectures for optics and electronics, methods for detecting the state of peptides, proteins, etc. In the present work, the effect of organic ligands (MPS, BSA, GSH, EDTA, TG) on Ag2S NP self-assembly during solution droplet evaporation was investigated. The synthesis conditions were optimized to minimize or neglect the contribution of surface roughness, substrate thermal conductivity, NP shape and size, type of solvent. Properties of a stabilizer, such as molecular length, reactivity, tendency to polycondensate or chelate, and their relative concentration affect the nanoparticle–nanoparticle interactions, which results in several types of pattern formation. The dominant forces in different regions of the evaporated droplet via ligand were discussed. The models of pattern formation were proposed. Thus, depending on the ligand, Ag2S NPs tend to form rings (MPS, BSA), concentric rings (BSA), net like structures (TG), and chains (MPS, TG). In addition, it was shown that replacing water with deuterium can significantly change self-organized architectures.

AB - Over the last decade, great attention of researchers has been focused on nanoscale self-assembly due to increasingly technology-relevant applications. Pattern formation by colloidal droplet evaporation is one of the fascinating subjects to study. A deep understanding of physical and chemical processes of the deposited structure formation allows the development of bioprinting methods, nanoarchitectures for optics and electronics, methods for detecting the state of peptides, proteins, etc. In the present work, the effect of organic ligands (MPS, BSA, GSH, EDTA, TG) on Ag2S NP self-assembly during solution droplet evaporation was investigated. The synthesis conditions were optimized to minimize or neglect the contribution of surface roughness, substrate thermal conductivity, NP shape and size, type of solvent. Properties of a stabilizer, such as molecular length, reactivity, tendency to polycondensate or chelate, and their relative concentration affect the nanoparticle–nanoparticle interactions, which results in several types of pattern formation. The dominant forces in different regions of the evaporated droplet via ligand were discussed. The models of pattern formation were proposed. Thus, depending on the ligand, Ag2S NPs tend to form rings (MPS, BSA), concentric rings (BSA), net like structures (TG), and chains (MPS, TG). In addition, it was shown that replacing water with deuterium can significantly change self-organized architectures.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85188987304

U2 - 10.1016/j.molliq.2024.124556

DO - 10.1016/j.molliq.2024.124556

M3 - Article

VL - 400

JO - Journal of Molecular Liquids

JF - Journal of Molecular Liquids

SN - 0167-7322

M1 - 124556

ER -