scholarly journals Probing for Flaws

2001 ◽  
Vol 123 (10) ◽  
pp. 73
Author(s):  
John DeGaspari
Keyword(s):  
Carbon Nanotubes ◽  
Nondestructive Evaluation ◽  
Evaluation Methods ◽  
Pressure Vessels ◽  
Scanning Probe ◽  
Haptic Interface ◽  
Research Center ◽  
High Altitudes ◽  
Langley Research Center ◽  
Fine Tune

This article focuses on NASA Langley that is manipulating carbon nanotubes to test for weaknesses in advanced aircraft materials. NASA’s Langley Research Center in Hampton, VA, is making use of nanotechnology to develop methods for nondestructive evaluation to support super lightweight, multifunctional structures. Carbon nanotubes, for instance, can be used as sensing elements embedded in materials. In general, nondestructive evaluation methods could be used to detect flaws in material structures, such as pressure vessels, air plane hulls that expand at high altitudes, or space stations subject to bombardment from meteorites. Using the NanoManipulator makes it possible to fine tune the position of the nanotubes. Besides plotting coordinates on a screen, the NanoManipulator’s haptic interface—a penlike device for guiding the scanning probe—will stop the user from pushing the probe tip through the surface of the sample.

scholarly journals Supramolecular structures of terbium(iii) porphyrin double-decker complexes on a single-walled carbon nanotube surface

RSC Advances ◽  
2019 ◽  
Vol 9 (48) ◽  
pp. 28135-28145
Author(s):  
Ahmed I. A. Abd El-Mageed ◽  
Takuji Ogawa
Keyword(s):  
Carbon Nanotubes ◽  
Scanning Probe Microscopy ◽  
Single Walled Carbon Nanotubes ◽  
Supramolecular Structures ◽  
Scanning Probe ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Double Decker ◽  
Walled Carbon Nanotubes ◽  
First Time

For the first time, using scanning probe microscopy, the supramolecular structures of terbium porphyrin double-decker complexes were observed on single-walled carbon nanotubes surfaces, where the molecules formed a well-ordered self-assembled array.

Electrical Properties of Pd-contacted Single-walled Carbon Nanotubes: A Scanning Probe Microscopy Study

2010 ◽  
Vol 1258 ◽  
Author(s):  
Oleg Kononenko ◽  
S I Bozhko ◽  
V N Matveev ◽  
V T Volkov ◽  
M A Knyazev ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Scanning Probe Microscopy ◽  
Contact Potential Difference ◽  
Single Walled Carbon Nanotubes ◽  
Scanning Probe ◽  
Contact Potential ◽  
Reliable Technique ◽  
Probe Microscopy ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

AbstractPd is widely used in producing electrodes to single-walled carbon nanotubes (SWNT). However up to now its ability to form ohmic contacts to SWNTs was not employed in scanning probe microscopy (SPM). Here we present a study of SWNTs with Pd electrodes by SPM using Pd-coated tips. SWNTs were selectively grown on oxidized silicon substrates by low pressure CVD method. Pd electrodes were prepared to SWNTs to fabricate two terminal structures for SWNTs resistance measurements. It is shown that SPM Kelvin mode is a reliable technique for SWNT detection on insulating substrate. Contact potential difference between Pd electrode and SWNT is measured using the Kelvin mode.

Quantitative nondestructive evaluation of delamination damage in CFRP pressure vessels for space use

2006 ◽  
Author(s):  
Takahide Sakagami ◽  
Shiro Kubo ◽  
Yukio Hyodo ◽  
Toshio Ogasawara ◽  
Takashi Nishimura ◽  
...  
Keyword(s):  
Nondestructive Evaluation ◽  
Space Use ◽  
Pressure Vessels ◽  
Delamination Damage

scholarly journals Acoustic calibration of the Exterior Effects Room at the NASA Langley Research Center

2010 ◽  
Author(s):  
Kenneth J. Faller II ◽  
Stephen Rizzi ◽  
Jacob Klos ◽  
William L. Chapin ◽  
Fahri Surucu ◽  
...  
Keyword(s):  
Research Center ◽  
Langley Research Center ◽  
Acoustic Calibration

scholarly journals Development of nondestructive evaluation methods for structural ceramics

1997 ◽  
Author(s):  
W.A. Ellingson ◽  
R.D. Koehl ◽  
J.B. Stuckey ◽  
J.G. Sun ◽  
H.P. Engel ◽  
...  
Keyword(s):  
Nondestructive Evaluation ◽  
Evaluation Methods ◽  
Structural Ceramics
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