Optical and Electrical Properties of Inner Tubes in Outer Wall-Selectively Functionalized Double-Wall Carbon Nanotubes

Piao, Yanmei; Chen, C. F.; Green, Alexander A.; Kwon, Hyejin; Hersam, Mark C.; Lee, Cheng S.; Schatz, George C.; Wang, YuHuang

doi:10.1021/jz200687u

Cited by 39 publications

(63 citation statements)

References 32 publications

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“…As previously reported by us, 22 the first change is approximately a 50% decrease in conductance associated with the loss of electrical transport mobility of the outer wall. The second change results from chemical gating effects associated with the charge from the attached group 28 and can be measured as shifts in the transport properties (Figure 2b).…”

Section: Resultssupporting

confidence: 81%

“…The reagent was synthesized from 4-amino-2-fluorobenzoic acid (Sigma-Aldrich, ≥97%), fluoroboric acid, and sodium nitrite using a previously described method. 22 The diazonium structure was confirmed by 1 H NMR (Bruker DRX-400) and FTIR (Thermo Nicolet NEXUS 670 with ATR attachment) spectroscopies. For NMR analysis, samples were dissolved in acetonitrile- d 3 (99.8%, Cambridge Isotope Laboratories, Inc.).…”

Section: Materials and Methodsmentioning

confidence: 99%

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Chemical Gating of a Synthetic Tube-in-a-Tube Semiconductor

Chen

Kwon

et al. 2017

J. Am. Chem. Soc.

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A critical challenge to translating field effect transistors into biochemical sensor platforms is the requirement of a gate electrode, which imposes restrictions on sensor device architectures and results in added expense, poorer scalability, and electrical noise. Here we show that it is possible to eliminate the need of the physical gate electrode and dielectrics altogether using a synthetic tube-in-a-tube (Tube∧2) semiconductor. Composed of a semiconducting single-walled carbon nanotube nested in a charged, impermeable covalent functional shell, Tube∧2 allows the semiconducting conduction pathway to be modulated solely by surface functional groups in a chemically gated-all-around configuration. The removal of physical gates significantly simplifies the device architecture and enables photolithography-free, highly scalable fabrication of transistor sensors in nonconventional configurations that are otherwise impossible. We show that concomitant FET sensitivity and single-mismatch selectivity can be achieved with Tube∧2 even in a two-terminal, thin film transistor device configuration that is as simple as a chemiresistor. Miniaturized two-terminal field effect point sensors can also be fabricated, using a straightforward dice-and-dip procedure, for the detection of tuberculosis biomarkers.

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Section: Resultssupporting

confidence: 81%

Section: Materials and Methodsmentioning

confidence: 99%

Chemical Gating of a Synthetic Tube-in-a-Tube Semiconductor

Chen

Kwon

et al. 2017

J. Am. Chem. Soc.

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“…In fact, such phenomena have been experimentally observed in the case of double-walled carbon nanotubes and outer wall-selectively functionalized DWCNTs using Raman scattering. 30,31 Our theoretical predictions are generally consistent.…”

Section: Resultssupporting

confidence: 69%

Chemical Control and Spectral Fingerprints of Electronic Coupling in Carbon Nanostructures

et al. 2016

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The optical and electronic properties of atomically thin materials such as single-walled carbon nanotubes and graphene are sensitively influenced by substrates, the degree of aggregation, and the chemical environment. However, it has been experimentally challenging to determine the origin and quantify these effects. Here we use time-dependent density-functional-theory calculations to simulate these properties for well-defined molecular systems. We investigate a series of core–shell structures containing C60 enclosed in progressively larger carbon shells and their perhydrogenated or perfluorinated derivatives. Our calculations reveal strong electronic coupling effects that depend sensitively on the interparticle distance and on the surface chemistry. In many of these systems we predict considerable orbital mixing and charge transfer between the C60 core and the enclosing shell. We predict that chemical functionalization of the shell can modulate the electronic coupling to the point where the core and shell are completely decoupled into two electronically independent chemical systems. Additionally, we predict that the C60 core will oscillate within the confining shell, at a frequency directly related to the strength of the electronic coupling. This low-frequency motion should be experimentally detectable in the IR region.

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“…20 The salts were stored at 4 °C and used within a week after synthesis. Exposure to light was limited by covering the vial with aluminum foil.…”

Section: Methodsmentioning

confidence: 99%

Laser Lithography of a Tube-in-a-Tube Nanostructure

Piao

Wang

2017

ACS Nano

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Carbon nanotubes hold vast potential for device innovations because their optical and electronic properties can be synthetically tailored at a length scale unattainable by lithographic techniques. However, lithographic patterning of carbon nanotubes with electronic-type control remains one of the major problems for the integration of these nanomaterials for practical device applications. In this work, we propose a laser lithography method for direct-write patterning of devices on thin films of outer wall selectively functionalized double-walled carbon nanotubes (Tube^2). This method is enabled by the reversible removal of surface functional groups with a laser tuned into resonance with the inner tube of Tube^2. We show that it is possible to directly create patterned dot arrays and conductive pathways and circuits on insulating Tube^2 thin films by tuning the resonance of the direct-writing laser with the electronic type of the inner tube (i.e., metallic or semiconducting). The successful patterning was unambiguously confirmed with in situ Raman spectral imaging and electrical characterization. This work suggests the possibility of developing a nanostructure-specific nanofabrication technology reminiscent of thermal printing.

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Optical and Electrical Properties of Inner Tubes in Outer Wall-Selectively Functionalized Double-Wall Carbon Nanotubes

Cited by 39 publications

References 32 publications

Chemical Gating of a Synthetic Tube-in-a-Tube Semiconductor

Chemical Gating of a Synthetic Tube-in-a-Tube Semiconductor

Chemical Control and Spectral Fingerprints of Electronic Coupling in Carbon Nanostructures

Laser Lithography of a Tube-in-a-Tube Nanostructure

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