Enhancement of ambipolar characteristics in single-walled carbon nanotubes using C60 and fabrication of logic gates

Park, Steve; Nam, Ji Hyun; Koo, Ja Hoon; Lei, Ting; Bao, Zhenan

doi:10.1063/1.4914476

Cited by 12 publications

(4 citation statements)

References 31 publications

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“…The output characteristics in the linear regime (magnified and shown in Figure S2, Supporting Information) indicate that the contact between SWCNTs and Ag electrodes are Ohmic for the injection of both holes and electrons. This suggests that low-cost inkjet printed Ag electrodes are suitable contacts for ambipolar SWCNT TFTs in place of expensive vacuum deposited Au electrodes, which have been hitherto employed as contacts in ambipolar TFTs. ,,,− ,− Figure c,d shows transfer characteristics of the ambipolar SWCNT TFT at V DS = −0.5 V and 0.5 V, respectively ( I DS – V GS on a linear scale is shown in Figure S3, Supporting Information). The hysteresis presented in the initial TFT (Figure a) is greatly reduced (from 3 to 0.6 V) in the ambipolar TFT after the Al 2 O 3 layer is deposited.…”

Section: Resultsmentioning

confidence: 99%

“…NAND and NOR gates on a glass substrate are also demonstrated. Two different logic functions (NAND and NOR) can be performed in a single device when ambipolar TFTs are employed. − Four ambipolar SWCNT TFTs were connected as shown in Figure a to construct NAND or NOR logic gates. For a NAND logic operation, two TFTs connected in parallel work as p-TFTs and the other two TFTs connected in series work as n-TFTs.…”

Section: Resultsmentioning

confidence: 99%

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Inkjet Printed Circuits on Flexible and Rigid Substrates Based on Ambipolar Carbon Nanotubes with High Operational Stability

Kim

Geier

Hersam

et al. 2015

ACS Appl. Mater. Interfaces

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Inkjet printed ambipolar transistors and circuits with high operational stability are demonstrated on flexible and rigid substrates employing semiconducting single-walled carbon nanotubes (SWCNTs). All patterns, which include electrodes, semiconductors, and vias, are realized by inkjet printing without the use of rigid physical masks and photolithography. An Al2O3 layer deposited on devices by atomic layer deposition (ALD) transforms p-type SWCNT thin-film transistors (TFTs) into ambipolar SWCNT TFTs and encapsulates them effectively. The ambipolar SWCNT TFTs have balanced electron and hole mobilities, which facilitates their use in multicomponent circuits. For example, a variety of logic gates and ring oscillators are demonstrated based on the ambipolar TFTs. The three-stage ring oscillator operates continuously for longer than 80 h under ambient conditions with only slight deviations in oscillation frequency. The successful demonstration of ambipolar devices by inkjet printing will enable a new class of circuits that utilize n-channel, p-channel, and ambipolar circuit components.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Inkjet Printed Circuits on Flexible and Rigid Substrates Based on Ambipolar Carbon Nanotubes with High Operational Stability

Kim

Geier

Hersam

et al. 2015

ACS Appl. Mater. Interfaces

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“…For example, Li et al showed that carbon peapods display a photo‐induced electron transfer from encapsulated C 60 to SWNTs, exhibiting p ‐type characteristic on illumination . Park et al reported thermally deposited C 60 on SWNTs resulting in ambipolar SWNT FETs and a left shift of the threshold voltage, which became stronger with the increasing thickness of the deposited C 60 . Here, we demonstrate HA‐SWNT FET analysis when various fullerene derivatives are solution‐coated in air and the interaction with the mixed SWNTs and the s‐SWNTs by a simple process of m‐SWNT removal using high current, both of which have not been reported to date.…”

Section: Resultsmentioning

confidence: 64%

Investigation of charge interaction between fullerene derivatives and single‐walled carbon nanotubes

Delacou

Jeon

Otsuka

et al. 2019

InfoMat

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The charge interaction and corresponding doping effect between single‐walled carbon nanotubes (SWNTs) and various fullerene derivatives, namely, C60, phenyl‐C61‐butyric acid methyl ester (PC61BM), methano‐indenefullerene (MIF), 1′,1″,4′,4″‐tetrahydrodi[1,4]methanonaphthaleno[5,6]fullerene (ICBA), 1,4‐bis(dimethylphenylsilylmethyl)[60]fullerene (SIMEF‐1), and dimethyl(orthoanisyl) silylmethyl(dimethylphenylsilylmethyl)[60]fullerene (SIMEF‐2), are investigated. A variety of analytical techniques, including field‐effect transistors (FETs) made of horizontally aligned arrays of SWNTs, is used as a means of investigation. Data from different measurements have to be used to obtain a concrete evaluation for the fullerene‐applied SWNTs. The data collectively points toward the conclusion that fullerenes with high molecular orbital energy levels, namely, MIF, SIMEF‐1, SIMEF‐2, and PC61BM, induce p‐type doping, while fullerenes with low molecular orbital energy levels, namely, ICBA and C60, induce n‐type doping on the carbon nanotubes. Nevertheless, the SWNTs retained p‐type characteristics because n‐doping induced by the fullerenes are weak compared to the p‐doping of the water and oxygen on carbon nanotubes. This means that fullerene derivatives have the ability to fine‐tune the energy levels of carbon nanotubes, which can play a crucial role in carbon nanotube‐based electronics, such as solar cells, light‐emitting devices, and FETs.

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“…Since the advent of Carbon Nanotubes by Iijima in 1991 [1] and subsequent synthesis of Singlewalled Carbon Nanotubes (SWCNTs) by Iijima [2] & Bethune [3] , Singlewalled Carbon Nanotubes have grabbed utmost attention because of their mesmerizing electrical [4,5] , mechanical [6,7] and optical properties [8,9] . This multifaceted seamless one-dimensional roll of a single layer of graphite (graphene) has revealed highly promising applications in future molecular electronics [10,11] over the last few decades.…”

Section: Introductionmentioning

confidence: 99%

A theoretical study of (9, 0) Singlewalled Carbon Nanotubes using quantum mechanical techniques

Sharma¹,

Jaggi²

2021

CAN

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First principles simulation studies using the density functional theory have been performed on (9, 0) Zigzag Singlewalled Carbon Nanotube (SWCNT) to investigate its electronic, optical and thermodynamic properties using CASTEP (Cambridge Sequential Total Energy Package) and DFTB (Density Functional based Tight Binding) modules of the Material Studio Software version 7.0. Various functionals and sub-functionals available in the CASTEP Module (using Pulay Density Mixing treatment of electrons) and various eigen-solvers and smearing schemes available in the DFTB module (using smart algorithm) have been tried out to chalk out the electronic structure. The analytically deduced values of the band gap obtained were compared with the experimentally determined value reported in the literature. By comparison, combination of Anderson smearing scheme and standard diaogonalizer produced best results in DFTB module while in the CASTEP module, GGA (General Gradient approximation) functional with RPBE (Revised-perdew-Burke-Ernzerh) as Sub-functional was found to be the most consistent. These optimized parameters were then used to determine various electronic, optical and thermodynamic properties of (9, 0) Singlewalled Nanotube. (9, 0) Singlewalled Nanotube, which is extensively being used for sensing NH3, CH4 & NO2, has been picked up in particular as it is reported to exhibit a finite energy band gap in contrast to its expected metallic nature. The study is of utmost significance as it not only probes and validates the simulation route for predicting suitable properties of nanomaterials but also throws light on the comparative efficacy of the different approximation and rationalization quantum mechanical techniques used in simulation studies.

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Enhancement of ambipolar characteristics in single-walled carbon nanotubes using C60 and fabrication of logic gates

Cited by 12 publications

References 31 publications

Inkjet Printed Circuits on Flexible and Rigid Substrates Based on Ambipolar Carbon Nanotubes with High Operational Stability

Inkjet Printed Circuits on Flexible and Rigid Substrates Based on Ambipolar Carbon Nanotubes with High Operational Stability

Investigation of charge interaction between fullerene derivatives and single‐walled carbon nanotubes

A theoretical study of (9, 0) Singlewalled Carbon Nanotubes using quantum mechanical techniques

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