NDLI: Designing sterically demanding thiolate coated AuNPs for electrical characterization of BPDT in a NP–molecule

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Designing sterically demanding thiolate coated AuNPs for electrical characterization of BPDT in a NP–molecule–nanoelectrode platform

Content Provider	Royal Society of Chemistry (RSC)
Author	Lère-Porte, Jean-Pierre Leifer, Klaus Orthaber, Andreas Jarrosson, Thibaut Calard, Francois Hayat, Aqib Jafri, S. Hassan M. Wani, Ishtiaq Hassan Serein-Spirau, Françoise
Copyright Year	2017
Abstract	Molecular electronics with single or few molecules requires a stable metal–molecule nanojunction platform. Herein, we report the design and synthesis of gold nanoparticles coated with sterically demanding thiol ligands that are essential to fabricate a versatile and stable nanoelectrode–molecule–nanoparticle platform suitable for electrical characterization of small organic molecules. By combining ω-tetraphenylmethane ether functionalized alkyl thioacetate and alkyl thiols, we prepared highly stable gold nanoparticles in a one-phase reaction providing simple and efficient purification. This robust preparation gives highly pure nanoparticles in very high yields (up to 90%) with long-time shelf stability. The synthesis in this work has superior reproducibility compared to previous synthesis processes that are currently being used for such molecular electronics platforms. Electron microscopy confirms the formation of uniform and small nanoparticles in the range of 5 to 7 nm. These nanoparticles with different ligand surface coverages were placed in a 20 nm nanoelectrode setup using dielectrophoretic forces. This setup was utilized to characterize the conductivity of the molecular wire 4,4′-biphenyldithiol introduced via ligand place-exchange under ambient conditions.
Starting Page	133
Ending Page	139
Page Count	7
File Format	HTM / HTML PDF
ISSN	20589689
Volume Number	2
Issue Number	2
Journal	Molecular Systems Design & Engineering
DOI	10.1039/c6me00095a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electron microscope Molecular electronics Thiol Ether Alkyl Ligand Molecular wire Nanoelectrochemistry
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Chemistry Materials Chemistry Energy Engineering and Power Technology Biomedical Engineering Process Chemistry and Technology

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