Mechanism‐Guided Improvements to the Single Molecule Oxidation of Carbon Nanotube Sidewalls

Coroneus, John G.; Goldsmith, Brett; Lamboy, Jorge A.; Kane, Alexander; Collins, Philip G.; Weiss, Gregory A.

doi:10.1002/cphc.200700863

Cited by 22 publications

(22 citation statements)

References 22 publications

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“…Reactions with isolated, single-walled carbon nanotubes (SWNTs) provide a promising case for directly connecting the experimental techniques for controlling single molecule chemistry to modern theoretical modeling. Recent experiments have revealed that the electrical conductance G of a SWNT is a very sensitive and effective transducer of individual chemical events on the SWNT sidewall [1][2][3]. This transduction allows experiments to construct devices with single bond modifications, an ideal situation for comparison to atomistic modeling.…”

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confidence: 99%

Atomistic Oxidation Mechanism of a Carbon Nanotube in Nitric Acid

et al. 2010

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Motivated by recent experiments, we investigate how NO3-SWNT interactions become energetically favorable with varying oxidation state of a single-walled carbon nanotube (SWNT) using first-principles calculations. Chemisorption becomes less endothermic with respect to physisorption when the SWNT oxidation state is elevated. Importantly, the dissociative incorporation of an oxygen atom into the SWNT sidewall becomes highly favorable when the SWNT oxidation state is elevated from electron density depletion in the vicinity, as caused experimentally using electrochemical potential. The elevation of the SWNT oxidation state through accumulating local charge transfer from the surrounding molecules does not have the same effect. Our investigation reveals the crucial effects of the SWNT oxidation state in understanding the molecule-SWNT interaction.

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Atomistic Oxidation Mechanism of a Carbon Nanotube in Nitric Acid

et al. 2010

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“…17 We also observe this metastability during oxidation in sulfuric acid, but the existence of RTN during post-oxidation recordings in saline solution suggests the RTN we observe may have an alternative source.…”

Section: Random Telegraph Noisementioning

confidence: 47%

Complementary Metal-Oxide-Semiconductor Integrated Carbon Nanotube Arrays: Toward Wide-Bandwidth Single-Molecule Sensing Systems

et al. 2016

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There is strong interest in realizing genomic molecular diagnostic platforms that are label-free, electronic, and single-molecule. One attractive transducer for such efforts is the single-molecule field-effect transistor (smFET), capable of detecting a single electronic charge and realized with a point-functionalized exposed-gate one-dimensional carbon nanotube field-effect device. In this work, smFETs are integrated directly onto a custom complementary metal-oxide-semiconductor (CMOS) chip, resulting in an array of up to 6000 devices delivering a measurement bandwidth of 1-MHz. In a first exploitation of these high-bandwidth measurement capabilities, point functionalization through electrochemical oxidation of the devices is observed with microsecond temporal resolution, revealing complex reaction pathways with resolvable scattering signatures. High-rate random telegraph noise is detected in certain oxidized devices, further illustrating the measurement capabilities of the platform.

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“…12,17 Figure 2 shows a typical oxidation measurement performed in 1 M H 2 SO 4 at a potential of +0.6 V versus Pt. 1.…”

Section: Methodsmentioning

confidence: 99%

Scaffolding carbon nanotubes into single-molecule circuitry

et al. 2008

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While nanowires and nanotubes have been shown to be electrically sensitive to various chemicals, not enough is known about the underlying mechanisms to control or tailor this sensitivity. By limiting the chemically sensitive region of a nanostructure to a single binding site, single molecule precision can be obtained to study the chemoresistive response. We have developed techniques using single-walledcarbon-nanotube (SWCNT) circuits that enable single-site experimentation and illuminate the dynamics of chemical interactions. Discrete changes in the circuit conductance reveal chemical processes happening in real-time and allow SWCNT sidewalls to be deterministically broken, reformed, and conjugated to target species.

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Mechanism‐Guided Improvements to the Single Molecule Oxidation of Carbon Nanotube Sidewalls

Cited by 22 publications

References 22 publications

Atomistic Oxidation Mechanism of a Carbon Nanotube in Nitric Acid

Atomistic Oxidation Mechanism of a Carbon Nanotube in Nitric Acid

Complementary Metal-Oxide-Semiconductor Integrated Carbon Nanotube Arrays: Toward Wide-Bandwidth Single-Molecule Sensing Systems

Scaffolding carbon nanotubes into single-molecule circuitry

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