TY - JOUR
T1 - Gold Nanoparticle Assemblies on Surfaces
T2 - Reactivity Tuning through Capping-Layer and Cross-Linker Design
AU - Shankar, Sreejith
AU - Orbach, Meital
AU - Kaminker, Revital
AU - Lahav, Michal
AU - van der Boom, Milko E
N1 - Helen and Martin Kimmel Center for Molecular Design; Israel Science Foundation (ISF) This research was supported by the Helen and Martin Kimmel Center for Molecular Design and the Israel Science Foundation (ISF). M.E.vdB. is the incumbent of the Bruce A. Pearlman Professorial Chair in Synthetic Organic Chemistry.
PY - 2016/1/7
Y1 - 2016/1/7
N2 - The immobilization of metal nanoparticles (NPs) with molecular control over their organization is challenging. Herein, we report the formation of molecularly cross-linked AuNP assemblies using a layer-by-layer approach. We observed four types of assemblies: 1) small aggregates of individual AuNPs, 2) large aggregates of individual AuNPs, 3) networks of fused AuNPs, and 4) gold islands. Interestingly, these assemblies with the different cross-linkers and capping layers represent different stages in the complete fusion of AuNPs to afford islands of continuous gold. We demonstrate that the stability toward fusion of the nanoparticles of the on-surface structures can be controlled by the reactivity of the cross-linkers and the hydrophilicity/hydrophobicity of the nanoparticles.
AB - The immobilization of metal nanoparticles (NPs) with molecular control over their organization is challenging. Herein, we report the formation of molecularly cross-linked AuNP assemblies using a layer-by-layer approach. We observed four types of assemblies: 1) small aggregates of individual AuNPs, 2) large aggregates of individual AuNPs, 3) networks of fused AuNPs, and 4) gold islands. Interestingly, these assemblies with the different cross-linkers and capping layers represent different stages in the complete fusion of AuNPs to afford islands of continuous gold. We demonstrate that the stability toward fusion of the nanoparticles of the on-surface structures can be controlled by the reactivity of the cross-linkers and the hydrophilicity/hydrophobicity of the nanoparticles.
UR - http://www.scopus.com/inward/record.url?scp=84970897352&partnerID=8YFLogxK
U2 - https://doi.org/10.1002/chem.201503297
DO - https://doi.org/10.1002/chem.201503297
M3 - مقالة
SN - 0947-6539
VL - 22
SP - 1728
EP - 1734
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 5
ER -