Fabrication of carbon nanotube field effect transistors by AC dielectrophoresis method

Li, Jingqi; Zhang, Qing; Yang, Daiqin; Tian, Jingze

doi:10.1016/j.carbon.2004.05.002

Cited by 137 publications

(120 citation statements)

References 20 publications

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“…After the trapping process is complete, the chip is rinsed with IPA and blow dried with nitrogen gas to remove any unwanted nanotubes or impurities in the suspension. Other groups have dispersed CNT in an aqueous sodium dodecyl sulfate (SDS) [14][15][16][17][18][19][20]23], isopropyl alcohol (IPA) [21], dimethylformamide (DMF) [24], and DCE [25] for DEP assembly. Although an aqueous SDS solution has been used most frequently and has been shown to disperse CNT well, it is not compatible with our device fabrication process.…”

Section: Methodsmentioning

confidence: 99%

“…In DEP, CNTs are assembled from solution using a non-uniform AC electric field. However, all DEP assembled CNT-FETs reported in the literature used only a global back gate [14][15][16][17][18][19][21][22]24]. Global back gated devices give poor device performance due to inefficient gate coupling and contact-controlled operation.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, AC dielectrophoresis (DEP) has been utilized for large scale assembly of individual single-walled carbon nanotube (SWNT) or bundles at selected positions of the circuit [14][15][16][17][18][19][20][21][22][23][24][25]. In DEP, CNTs are assembled from solution using a non-uniform AC electric field.…”

Section: Introductionmentioning

confidence: 99%

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Local-gated single-walled carbon nanotube field effect transistors assembled by AC dielectrophoresis

Stokes

Khondaker²

2008

Nanotechnology

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We present a simple and scalable technique for the fabrication of solution processed & local gated carbon nanotube field effect transistors (CNT-FETs). The approach is based on directed assembly of individual single wall carbon nanotube from dichloroethane via AC dielectrophoresis (DEP) onto pre-patterned source and drain electrodes with a local aluminum gate in the middle. Localgated CNT-FET devices display superior performance compared to global back gate with on-off ratios >104 and maximum subthreshold swings of 170 mV/dec. The local bottom-gated DEP assembled CNT-FETs will facilitate large scale fabrication of complementary metal-oxidesemiconductor (CMOS) compatible nanoelectronic devices.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Local-gated single-walled carbon nanotube field effect transistors assembled by AC dielectrophoresis

Stokes

Khondaker²

2008

Nanotechnology

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“…In order that the biomaterials can well adsorb on the surface of the SWNTs, the devices were rinsed with deionized water and soaked in it for overnight to completely remove SDS residuals [28,29]. Selective electrical burnout [30] process was applied to remove metallic SWNTs and ensure a better electric contact between the semiconducting SWNTs and electrodes. From Figure 1a, one can see well aligned SWNT bundles bridging the electrode pairs.…”

Section: Methodsmentioning

confidence: 99%

Single‐Walled Carbon Nanotube Based Real‐Time Organophosphate Detector

et al. 2007

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A novel single-walled carbon nanotube (SWNT) based biosensor for real-time detection of organophosphate has been developed. Horizontally aligned SWNTs are assembled to desirable electrodes using AC dielectrophoresis technique. Organophosphorus hydrolase (OPH) immobilized on the SWNTs by nonspecific binding triggers enzymatic hydrolysis of organophosphates (OPs), such as paraoxon, consequently causing a detectable change in the conductance of the SWNTs. The conductance change is found to be correlated to the concentration of organophosphate. Our results suggest the novel biosensor has great potential to serve as a simple and reusable platform of sensing organophosphate on a real-time basis.

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“…1c inset) using AC dielectrophoresis technique [28 -30]. Electrical breakdown process [29] was employed to remove metallic SWNTs and improve the contacts between the SWNTs and electrodes. In order to remove the surfactant residuals on the SWNTs, the samples were soaked in deionized water for overnight [31].…”

Section: Methodsmentioning

confidence: 99%

Real‐Time Nitrophenol Detection Using Single‐Walled Carbon Nanotube Based Devices

et al. 2008

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Single-walled carbon nanotube (SWNT) based devices have been developed for the real-time detection of nitrophenols in aqueous solution. SWNTs are assembled to electrodes using AC dielectrophoresis technique. The SWNT devices exhibit not only high sensitivity to nitrophenol compounds, but also good reusability. Charge transfer between nitro group and SWNTs, and the metal-nanotube interface modification are hypothesized to be the possible origins of conductance change. These results indicated that the SWNT devices can be utilized as a simple, low cost, sensitive, and reusable platform for real-time detection of nitrophenol compounds.

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Fabrication of carbon nanotube field effect transistors by AC dielectrophoresis method

Cited by 137 publications

References 20 publications

Local-gated single-walled carbon nanotube field effect transistors assembled by AC dielectrophoresis

Local-gated single-walled carbon nanotube field effect transistors assembled by AC dielectrophoresis

Single‐Walled Carbon Nanotube Based Real‐Time Organophosphate Detector

Real‐Time Nitrophenol Detection Using Single‐Walled Carbon Nanotube Based Devices

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