Nanomechanics of Individual Carbon Nanotubes from Pyrolytically Grown Arrays

Gao, Ruoqi; Wang, Zhong Lin; Bai, Z. G.; Heer, Walter A. de; Dai, Liming; Gao, Mei

doi:10.1103/physrevlett.85.622

Cited by 187 publications

(130 citation statements)

References 13 publications

Supporting

Mentioning

118

Contrasting

Order By: Relevance

“…Using a similar approach, Gao et al [37] have been able to measure mechanical properties of individual carbon nanotubes. In this case, a transmission electron microscopy (TEM) specimen holder was specially built for applying a voltage across the nanotube and its counter electrode so that the measurements can be done on a specific nanotube whose microstructure is determined by TEM.…”

confidence: 99%

Sensors and sensor arrays based on conjugated polymers and carbon nanotubes

Dai

Soundarrajan

Kim

2002

Pure and Applied Chemistry

Self Cite

187

View full text Add to dashboard Cite

Abstract:The need for cheaper, faster, and more accurate measurements has been a driving force for the development of new sensing devices. As is well known, the electrical conductivity of conjugated polymers can be reliably regulated over a wide range through interactions with electron acceptors and donors. This, together with the fast optical dynamics (either in the ground or excited states) of most conjugated polymers, has made conjugated polymers very attractive as transducer-active materials. On the other hand, the unusual electronic, mechanical, and thermal properties of carbon nanotubes have also led to their potential use in a wide range of devices, including sensors. In particular, the ability of carbon nanotubes and their derivatives to operate as gas and glucose sensors has been recently demonstrated. This article provides a status review on the research and development of sensors and sensor arrays based on conjugated polymers and carbon nanotubes. The unique features characteristic of most reported sensing transduction modes related to conjugated polymers and carbon nanotubes are discussed, along with their pros and cons.

show abstract

confidence: 99%

Sensors and sensor arrays based on conjugated polymers and carbon nanotubes

Dai

Soundarrajan

Kim

2002

Pure and Applied Chemistry

Self Cite

187

View full text Add to dashboard Cite

show abstract

“…More specifically, Poncharal et al observed effective bending moduli in the GPa range for 20-40-nm-diameter multiwall carbon nanotubes (MWNTs) grown by an arc discharge method [23]. However, the same group then observed effective bending moduli as low as -GPa in structurally imperfect MWNTs produced by precursor pyrolisis, and concluded that point and volume defects played a dominant role in the reduction of the overall bending modulus [24]. Deformation of the tube cross section is also expected to lower the position of resonance in these fibers.…”

Section: Resultsmentioning

confidence: 99%

Dielectrophoretic Assembly of Carbon Nanofiber Nanoelectromechanical Devices

Evoy

Riegelman

Naguib

et al. 2005

IEEE Trans. Nanotechnology

View full text Add to dashboard Cite

We report a technique for the assembly of bottom-up nanomechanical devices. This technique employs the dielectrophoretic manipulation of nanostructures within a multiple layer lithography process. Mechanical resonators were specifically produced by assembling and clamping tubular carbon fibers onto prefabricated pads. Our preliminary results showed that an assembled cantilevered fiber with length L = 5 µm and width of W = 180 nm possessed a resonant frequency of f = 1.17 MHz. A shorter L = 3-µm-long singly clamped resonator of similar width showed a resonance of f = 3.12 MHz. This frequency range is in agreement with the low gigapascal bending moduli previously reported for carbon structures showing extensive volume defects. This technology would allow the integration of bottom-up nanostructures with other more established fabrication processes, thus allowing the deployment of engineered nanodevices in integrated systems. KeywordsDetectors, materials processing, microelectromechanical systems, microresonators, nanotechnology This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Pennsylvania's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it. Author(s)Stephane Evoy, Michael A. Riegelman, Nevin Naguib, Haihui Ye, Papot Jaroenapibal, David E. Luzzi, and Yury Gogotsi This journal article is available at ScholarlyCommons: http://repository.upenn.edu/mse_papers/76

show abstract

“…The position of contact from the end of the fiber L was measured via an internal optical microscope in the AFM. We have also determined the spring constants of the PEDOT cantilevers by the resonancefrequency method, which is technically simpler than the AFM method [33]. To measure the resonance frequency of a PEDOT fiber, we position this single PEDOT cantilever ~10 m from an Au counterelectrode.…”

Section: Experimental Methodsmentioning

confidence: 99%

Long reach cantilevers for sub-cellular force measurements

Paneru¹,

Thapa²,

McBride³

et al. 2012

Nanotechnology

View full text Add to dashboard Cite

Abstract. Maneuverable, high aspect ratio poly 3-4 ethylene dioxythiophene (PEDOT) fibers are fabricated for use as cellular force probes that can interface with individual pseudopod adhesive contact sites without forming unintentional secondary contacts to the cell. The straight fibers have lengths between 5 and 40 m and spring constants in the 0.07-23.2 nN m -1 range. The spring constants of these fibers were measured directly using an atomic force microscope (AFM). These AFM measurements corroborate determinations based on the transverse vibrational resonance frequencies of the fibers, which is a more convenient method. These fibers are employed to characterize the time dependent forces exerted at adhesive contacts between apical pseudopods of highly migratory D. discoideum cells and the PEDOT fibers, finding an average terminal force of 3.1  2.7 nN and lifetime of 23.4  18.5 s to be associated with these contacts.

show abstract

Nanomechanics of Individual Carbon Nanotubes from Pyrolytically Grown Arrays

Cited by 187 publications

References 13 publications

Sensors and sensor arrays based on conjugated polymers and carbon nanotubes

Sensors and sensor arrays based on conjugated polymers and carbon nanotubes

Dielectrophoretic Assembly of Carbon Nanofiber Nanoelectromechanical Devices

Long reach cantilevers for sub-cellular force measurements

Contact Info

Product

Resources

About