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Hamilton Receptor‐Mediated Self‐Assembly of Orthogonally Functionalized Au and TiO 2 Nanoparticles
Author(s) -
Ali Muhammad,
Hasenöhrl Dominik H.,
Zeininger Lukas,
Müllner Alexander R. M.,
Peterlik Herwig,
Hirsch Andreas
Publication year - 2019
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201900015
Subject(s) - chemistry , nanoparticle , small angle x ray scattering , moiety , self assembly , scanning electron microscope , colloidal gold , ligand (biochemistry) , titanium dioxide , chloroform , surface modification , dynamic light scattering , nanotechnology , chemical engineering , polymer chemistry , combinatorial chemistry , photochemistry , stereochemistry , organic chemistry , scattering , receptor , materials science , biochemistry , physics , engineering , optics , composite material
A new prototype of reversible self‐assembly between functionalized gold and titanium dioxide nanoparticles (NPs) utilizing hydrogen bonding interactions was developed and established. The gold nanoparticles were functionalized with a Hamilton ‐receptor functionality bearing a thiol moiety as anchoring group. The titanium dioxide nanoparticles were modified with cyanurate derivatives which contained phosphonic acids as anchoring groups. The host–guest type interaction between two functionalized nanoparticles yielded a highly integrated nanoparticle system in chloroform. Moreover, by presenting a competing ligand in an exchange reaction, the product of self‐assembly can be segregated into the individual soluble components of functionalized nanoparticles. The self‐assembly and the exchange reaction were followed and monitored in detail by UV/Vis spectroscopy. The structure of the self‐assembly product was investigated using scanning electron microscopy (SEM) and small‐angle X‐ray scattering (SAXS).