Comparing the weak and strong gate‐coupling regimes for nanotube and graphene transistors

Heller, Iddo; Chatoor, Sohail; Männik, Jaan; Zevenbergen, Marcel A. G.; Dekker, Cees; Lemay, Serge G.

doi:10.1002/pssr.200903157

Cited by 14 publications

(26 citation statements)

References 17 publications

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“…1d we show the characterization of the conductivity of the GNR as a function of the voltage applied across the pore. Because the GNR is located in the trans chamber, the positive ionic electrode acts as the gate for the graphene device 34 . In the data presented here, the graphene current shows a minimum close to 0 V, corresponding to the Dirac point in graphene (V D ).…”

Section: Dna Detection Through a Nanopore Using Gnrsmentioning

confidence: 99%

Detecting the translocation of DNA through a nanopore using graphene nanoribbons

et al. 2013

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Solid-state nanopores can act as single-molecule sensors and could potentially be used to rapidly sequence DNA molecules. However, nanopores are typically fabricated in insulating membranes that are as thick as 15 bases, which makes it difficult for the devices to read individual bases. Graphene is only 0.335 nm thick (equivalent to the spacing between two bases in a DNA chain) and could therefore provide a suitable membrane for sequencing applications. Here, we show that a solid-state nanopore can be integrated with a graphene nanoribbon transistor to create a sensor for DNA translocation. As DNA molecules move through the pore, the device can simultaneously measure drops in ionic current and changes in local voltage in the transistor, which can both be used to detect the molecules. We examine the correlation between these two signals and use the ionic current measurements as a real-time control of the graphene-based sensing device.

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Section: Dna Detection Through a Nanopore Using Gnrsmentioning

confidence: 99%

Detecting the translocation of DNA through a nanopore using graphene nanoribbons

et al. 2013

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“…In a field‐effect configuration, the gate capacitance plays a key role in the observed device characteristics . Two capacitances appear in series namely the geometric capacitance ( C geo ) and the quantum capacitance ( C qm ) as shown in the Figure .…”

Section: Fundamentals Of Label‐free Electrical Detectionmentioning

confidence: 99%

“…C geo is cylindrical for the nanotube and planar for graphene (similar to a parallel plate capacitor). In a back‐gated configuration, the geometric capacitance dominates the FET characteristics . C qm becomes important when using the liquid‐gated configuration.…”

Section: Fundamentals Of Label‐free Electrical Detectionmentioning

confidence: 99%

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25th Anniversary Article: Label‐Free Electrical Biodetection Using Carbon Nanostructures

Balasubramanian

Kern

2014

Advanced Materials

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Nanostructures are promising candidates for use as active materials for the detection of chemical and biological species, mainly due to the high surface-to-volume ratio and the unique physical properties arising at the nanoscale. Among the various nanostructures, materials comprised of sp(2) -carbon enjoy a unique position due to the possibility to readily prepare them in various dimensions ranging from 0D, through 1D to 2D. This review focuses on the use of 1D (carbon nanotubes) and 2D (graphene) carbon nanostructures for the detection of biologically relevant molecules. A key advantage is the possibility to perform the sensing operation without the use of any labels or complex reaction schemes. Along this spirit, various strategies reported for the label-free electrical detection of biomolecules using carbon nanostructures are discussed. With their promise for ultimate sensitivity and the capability to attain high selectivity through controlled chemical functionalization, carbon-based nanobiosensors are expected to open avenues to novel diagnostic tools as well as to obtain new fundamental insight into biomolecular interactions down to the single molecule level.

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“…For working in liquids, a more elegant configuration can be used ,. Here, the electrical double layer (EDL) formed at the graphene‐liquid interface serves as the gate capacitor and the gate voltage is applied through an appropriate reference electrode (such as Ag/AgCl) in solution (Figure c) . A major advantage of this setup is that the capacitive coupling is higher, since the double layer thickness (as determined by the ionic strength) is typically much lower than the thickness of solid‐state insulators.…”

Section: Fundamental Aspects Of the Graphene‐liquid Interfacementioning

confidence: 99%

Bioelectronics and Interfaces Using Monolayer Graphene

et al. 2018

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Graphene is expected to revolutionize several application areas ranging from portable energy conversion and storage to miniaturized biosensors for medical applications. In this endeavor, the control of surface characteristics is an essential aspect for understanding fundamental phenomena occurring at the graphene‐liquid interface. In this comprehensive review, we address recent progress in the investigation of the interfacial characteristics of monolayer graphene and methods for modulating the physical and chemical properties of this interface. We focus on the electrochemistry and field‐effect measurements in liquid, which provide an improved understanding of the unique graphene‐liquid interface, with due consideration of the influence of the underlying substrate and structural defects in graphene. Finally, we present reported examples of using single graphene monolayers in miniaturized devices for realizing sensors, neural interfaces and batteries.

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Comparing the weak and strong gate‐coupling regimes for nanotube and graphene transistors

Cited by 14 publications

References 17 publications

Detecting the translocation of DNA through a nanopore using graphene nanoribbons

Detecting the translocation of DNA through a nanopore using graphene nanoribbons

25th Anniversary Article: Label‐Free Electrical Biodetection Using Carbon Nanostructures

Bioelectronics and Interfaces Using Monolayer Graphene

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