Single-molecule conductance with nitrile and amino contacts with Ag or Cu electrodes

Li, Dongfang; Mao, Jin-Chuan; Chen, De-Li; Chen, Fang; Ze-Wen, HONG; Wang, Yahao; Zhou, Xiao‐Shun; Niu, Zhen-Jiang; Maisonhaute, Emmanuel

doi:10.1016/j.electacta.2015.06.018

Cited by 9 publications

(3 citation statements)

References 37 publications

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“…In addition to the linker structure, the nature of the linker electrode and linker nanoparticles must be taken into account to understand the electron transport through the prepared hybrid material. In fact, the binding strength of the anchoring groups on the electrode and nanoparticle surfaces could strongly influence the electron transport within the prepared hybrid material [ 51 , 52 , 53 ]. The contact geometry of the linker on the solid surface could be another influencing parameter.…”

Section: Resultsmentioning

confidence: 99%

Different Electrochemical Sensor Designs Based on Diazonium Salts and Gold Nanoparticles for Pico Molar Detection of Metals

et al. 2020

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We report a comparison of sensors’ performance of different hybrid nanomaterial architectures modifying an indium tin oxide (ITO) electrode surface. Diazonium salts and gold nanoparticles (AuNPs) were used as building units to design hybrid thin films of successive layers on the ITO electrode surface. Different architectures of hybrid thin films were prepared and characterized with different techniques, such as TEM, FEG-SEM, XPS, and EIS. The prepared electrodes were used to fabricate sensors for heavy metal detection and their performances were investigated using the square wave voltammetry (SWV) method. The comparison of the obtained results shows that the deposition of AuNPs on the ITO surface, and their subsequent functionalization by diazonium salt, is the best performing architecture achieving a high sensitivity in terms of the lower detection limit of pico molar.

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Section: Resultsmentioning

confidence: 99%

Different Electrochemical Sensor Designs Based on Diazonium Salts and Gold Nanoparticles for Pico Molar Detection of Metals

et al. 2020

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“…This double can act as reproducible gating element for studying the conductivity of single molecules. 75 This gate voltage can be controlled through variations in electrochemical potentials and can be applied to various biomolecules, organic molecules to understand the conductivity properties and hence to develop a single molecular transistor for future bioelectronic devices. 76 This concept of electrochemical gating has been exploited to the single molecule level by varying the electrochemical potentials and the resultant double layer in order to adjust the molecular orbital energy levels.…”

Section: Single Molecule Charge Transport and Switchingmentioning

confidence: 99%

Electrochemical Scanning Tunneling Microscopy Analysis on Protein Based Electronic Devices

Yagati¹,

Lee²,

Nam³

et al. 2017

sci adv mater

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Scanning probe microscopy (SPM) techniques demonstrate one of the most promising tools to investigate the physical and chemical properties of materials at nanoscale and become the most common and important characterization tools in the field of nanotechnology. Among many SPM methods electrochemical scanning tunneling microscopy (EC-STM) technique is one technique that directly provides three-dimensional real-space images with in-situ interfacial electrochemical studies and allows locally measured properties of nanostructured materials at atomic resolution. Furthermore, EC-STM based studies provides information on solution covered areas of electrode surfaces, metal deposition, charge transfer, potential-dependent surface morphology, corrosion, semiconductors, and various applications such as protein conductance measurements in nanobioelectronics. Therefore, in this review, we summarize the electrochemical scanning tunneling microscopic investigation on protein based electrode structures and their applications towards novel bioelectronic devices along with recent developments in ECSTM techniques with future prospects in the field of nanobiotechnology.

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“…Several experimental configurations are available, but those deriving from the scanning tunneling microscope break junction (STMBJ) that emerged from 2003, and presently implemented in several groups, are the only ones that allow performing measurements under electrochemical conditions. [33][34][35][36][37] For that, a metallic STM tip, most often a gold one, is insulated so as to minimize the leakage current. It is then approached towards a surface modified with the molecule of interest until contact.…”

Section: Electron Transfer Through Electroactive Molecules: Transientmentioning

confidence: 99%

Transient electrochemistry: beyond simply temporal resolution

et al. 2016

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Some physicochemical intrigues for which transient electrochemistry was necessary to solve the problem are summarized in this feature article. First, we highlight the main constraints to be aware of to access to low time scales, and particularly focus on the effects of stray capacitances. Then, the electron transfer rate constant measured for redox molecules in a self-assembled monolayer configuration is compared to the conductance measured through the same systems, but at the single molecule level. This evidences strong conformational changes when molecules are trapped in the nanogap created between both electrodes. We also report about dendrimers, for which a short electrochemical perturbation induces creation of a diffusion layer within the molecule, allowing the electron hopping rate to be measured and analyzed in terms of molecular motions of the redox centers. Finally, we show that transient electrochemistry provides also useful information when coupled to other methodologies. For example, when an ultrasonic field drives very fast movements of a bubble situated above the electrode surface, the motion can be detected indirectly through a modification of the diffusion flux. Another field concerns pulse radiolysis, and we describe how the reactivity (at the electrode or within the solution) of radicals created by a radiolytic pulse can be quantified, widening the possibilities of electrochemistry to operate in biological media.

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Single-molecule conductance with nitrile and amino contacts with Ag or Cu electrodes

Cited by 9 publications

References 37 publications

Different Electrochemical Sensor Designs Based on Diazonium Salts and Gold Nanoparticles for Pico Molar Detection of Metals

Different Electrochemical Sensor Designs Based on Diazonium Salts and Gold Nanoparticles for Pico Molar Detection of Metals

Electrochemical Scanning Tunneling Microscopy Analysis on Protein Based Electronic Devices

Transient electrochemistry: beyond simply temporal resolution

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