Self-assembled single wall carbon nanotube field effect transistors and AFM tips prepared by hot filament assisted CVD

Marty, Laëtitia; Iaia, A.; Faucher, M.; Bouchiat, Vincent; Naud, Cécile; Chaumont, M.; Fournier, Thierry; Bonnot, A.M.

doi:10.1016/j.tsf.2005.07.218

Cited by 22 publications

(18 citation statements)

References 16 publications

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“…In this case, the pulse duration is only 500 ns at 1 kHz, resulting in a difference between the on and off currents of only 5%. Compared to the pulse durations in the range of 1 to 10 ms reported for CNT‐FET memories with a SiO 2 gate dielectric29, 32, 33 the present devices can be switched approximately three orders of magnitude faster. The highest operating clock frequency was found to be ∼ 5 kHz (at a duty cycle of 10%), which is not limited by the device itself but rather by the bandwidth of the current sense amplifier used to measure the drain current.…”

mentioning

confidence: 65%

Syntheses and Phase‐Transfer Properties of Dendritic Nanocarriers That Contain Perfluorinated Shell Structures

Garcı́a-Bernabé

Kramer

Olàh

et al. 2004

Chemistry A European J

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Perfect dendrimers that contain perfluorinated shells have recently attracted attention because they have been shown to encapsulate polar molecules in supercritical CO(2) and catalytically active metal nanoparticles in perfluorinated solvents. Moreover, they can then be easily separated after reaction from the biphasic organic/fluorous system. In this paper several dendritic architectures that contain perfluorinated shells were derived by covalent modification of glycerol dendrimers ([G0.5]-[G3.5]), hyperbranched polyglycerol, and polyethyleneimine. These core-shell architectures show interesting physicochemical properties. For example, they are soluble in fluorinated solvents, they are able to transport different guest molecules, and they display thermomorphic behavior. The transport capacity of these molecular nanocarriers increases significantly when amino groups are present in the core. Certain functionalized polyethyleneimines that contain perfluorinated shells show high transport capacities (up to 3 dye molecules per nanocarrier) in perfluorinated solvents. Moreover, these perfluoro-functionalized dendritic polyethyleneimines can act as templates that stabilize nanoparticles; for example, encapsulation and subsequent chemical reduction of Ag(I) ions. Silver nanoparticles with a narrow size distribution (3.9+/-1 nm) have been prepared and characterized by transmission electron microscopy. Furthermore, it has been demonstrated that the encapsulated guest molecules remain accessible to small molecules after transport into the fluorous phase. Therefore, dendritic nanocarriers that contain perfluorinated shells are currently being investigated as polar environments in nonpolar reaction media such as fluorous phases and supercritical CO(2), in particular, for application in homogenous catalysis.

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confidence: 65%

Syntheses and Phase‐Transfer Properties of Dendritic Nanocarriers That Contain Perfluorinated Shell Structures

Garcı́a-Bernabé

Kramer

Olàh

et al. 2004

Chemistry A European J

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“…Diameter of SWCNT is very small (1-4 nm) and more important it is constant through time, which is not the case of silicon-based tips; besides SWCNT offers little contamination during imaging. The current challenge with SWCNT is the production of correctly oriented SWCNT on AFM cantilever (Marty et al, 2006). Another road for improvement is the capacity to correct image distortion due to the finite tip size.…”

Section: Discussionmentioning

confidence: 99%

Computational Reconstruction of Multidomain Proteins Using Atomic Force Microscopy Data

et al. 2012

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Summary Classical structural biology techniques face a great challenge to determine the structure at the atomic level of large and flexible macromolecules. We present a novel methodology that combines high-resolution AFM topographic images with atomic coordinates of proteins to assemble very large macromolecules or particles. Our method uses a two-step protocol: atomic coordinates of individual domains are docked beneath the molecular surface of the large macromolecule, and then each domain is assembled using a combinatorial search. The protocol was validated on three test cases: a simulated system of antibody structures; and two experimentally-based test cases: Tobacco mosaic virus, a rod-shaped virus; and aquaporin Z, a bacterial membrane protein. We have shown that AFM-intermediate resolution topography and partial surface data are useful constraints for building macromolecular assemblies. The protocol is applicable to multi-component structures connected in the polypeptide chain or as disjoint molecules. The approach effectively increases the resolution of AFM beyond topographical information down to atomic-detail structures.

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“…The nanotubes are grown directly 18 at the tip apex of AFM probes by Chemical Vapor Deposition (CVD): the bare silicon cantilevers are fully dipped into the catalyst solution, then gently dried in a nitrogen flux before being placed in the furnace. CNTs grow everywhere on the cantilever, and around 1 in 3 cantilevers has a CNT at the tip 14 .…”

Section: Quasi-static Force Measurementsmentioning

confidence: 99%

Dynamic stiffness of the contact between a carbon nanotube and a flat substrate in a peeling geometry

Champougny

Bellon

2017

Journal of Applied Physics

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We study the physics of adhesion and the contact mechanics at the nanoscale with a peeling experiment of a carbon nanotube on a flat substrate. Using an interferometric atomic force microscope and an extended force modulation protocol, we investigate the frequency response of the stiffness of the nano-contact from DC to 20 kHz. We show that this dynamic stiffness is only weakly frequency dependent, increasing by a factor 2 when the frequency grows by 3 orders of magnitude. Such behavior may be the signature of amorphous relaxations during the mechanical solicitation at the nano-scale.

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Self-assembled single wall carbon nanotube field effect transistors and AFM tips prepared by hot filament assisted CVD

Cited by 22 publications

References 16 publications

Syntheses and Phase‐Transfer Properties of Dendritic Nanocarriers That Contain Perfluorinated Shell Structures

Syntheses and Phase‐Transfer Properties of Dendritic Nanocarriers That Contain Perfluorinated Shell Structures

Computational Reconstruction of Multidomain Proteins Using Atomic Force Microscopy Data

Dynamic stiffness of the contact between a carbon nanotube and a flat substrate in a peeling geometry

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