Polymer-grafted nanoparticles (PGNs) with adjustable graft-density and inter-particle hydrogen bonding interaction

Date
March 22, 2022

Polymer-grafted nanoparticles (PGNs) receive enormous attention because they possess the advantages of both the grafted polymer and inorganic cores, and thus may demonstrate superior optical, electronic, and mechanical properties. One potential application is PGN arrays for making optical or magnetic structures, where the tailorable interparticle interactions are significant for the formation of superlattice structures with a defined and ordered arrangement. In this work, we report the synthesis of PGNs which can form interparticle hydrogen-bonding to enhance the formation of well-defined 2D nanoparticle arrays. Various polymers, including poly(4-vinyl pyridine) (P4VP), poly(dimethyl aminoethyl acrylate) (PDMAEMA), and poly(4-acetoxy styrene) (PAcS), are attached to silica cores by a “grown from” in a mini emulsion-like synthesis approach. SiO2-PAcS brushes are deprotected by hydrazinolysis and converted into poly(4-vinyl phenol) (PVP), containing hydroxyl groups as potential hydrogen-bonding donor sites. Understanding and controlling interparticle interactions by varying grafting density, and formation of interparticle hydrogen bonding relevant for self-assembly of PGNs and formation of PGN superlattices structures are the motivation for this study.

Presenter

Speakers

Speaker Image for Florian Kaefer
Cornell University
Speaker Image for Christopher Ober
Professor, Cornell Univ

Related Products

Thumbnail for Synthesis and characterization of polymer-grafted nanoparticles (PGNs) with tailored inter-particle interactions
Synthesis and characterization of polymer-grafted nanoparticles (PGNs) with tailored inter-particle interactions
Polymer-grafted nanoparticles have received great interest in the last decade as they combine the advantages of both the grafted polymer and the inorganic cores, and thus demonstrate attractive optical, biological, magnetic, electronic and catalytic properties…
Thumbnail for Synthesis of fluorinated polystyrene-block-poly(vinyl methyl siloxane) for improving films’ anti-penetration performance | Poster Board #3371
Synthesis of fluorinated polystyrene-block-poly(vinyl methyl siloxane) for improving films’ anti-penetration performance | Poster Board #3371
Polydimethylsiloxane (PDMS) based surface coating materials have been widely explored in marine vessels' antifouling and fouling release materials due to their low surface energy and elastic modulus, good chemical stability, and eco-friendliness…
Thumbnail for Sequence control in polymer-based photoresists for EUV lithography
Sequence control in polymer-based photoresists for EUV lithography
Controlled sequence polymers remain a significant goal for polymer chemists. One of he challenges is that most applications require polymer molecular weights beyond those accessible by the successful polymer supported chemistries such as those used to make peptide oligomers for example…
Thumbnail for Controlling Soft Materials with Light: New Chemistry in Photopolymeric Materials
Controlling Soft Materials with Light: New Chemistry in Photopolymeric Materials
Division/Committee: [PMSE] Division of Polymeric Materials Science and Engineering