Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Carbon nanocoils fracture like an automobile spring

Carbon nanocoils
Carbon nanocoils

Abstract:
Carbon nanocoils (CNCs) composed of helical shaped carbon nanofibers have potential applications including mechanical springs, nano-solenoids, and field emitters.

However, in spite of the important applications of CNCs as mechanical spring for nano-eletcromechanical system (NEMS) there is a scarcity of data on CNC fracturing under tensile loads.

Here, Taiichiro Yonemura and colleagues at Toyohashi University of Technology describe the CNC fracturing properties of eight CNCs using focused ion beam (FIB) modification.

Carbon nanocoils fracture like an automobile spring

Toyohashi, Japan | Posted on March 5th, 2013

CNC tensile tests were conducted as follows: The CNCs were installed into an FIB system with a tungsten (W) probe with a 500 nm tip diameter and the W probe moved until it adhered to CNC using Pt ion beam whereas the Si ion beam cut the CNC bottom; then the CNC-adhered W probe approaches a Si substrate surface, until the CNC was almost perpendicularly to the Si substrate. Tensile tests for 8 CNCs were carried out by gradually changing the distance between the Si substrate and the W probe.

The elongation behavior of CNCs in the FIB instrument was monitored. Experiments showed the CNC coil pitch to return to its original length after fracturing, thus confirming CNC to be a spring. The average stretch ratio of the 8 CNCs on the verge of fracture was 150%.

The ratio of the maximum to average stress on the fractured surface was estimated to be in the range 1.3 to 1.7 indicating stress concentrations on the coil wire inner edge, and scanning microscopy confirmed a hollow region on the inner edge of all fractured surfaces.

The starting point of the CNC fracturing observed in the inner edge matched that of industrial steel coil springs used in automobiles.

Reference:
Taiichiro Yonemura, Yoshiyuki Suda, Hideto Tanoue, Hirofumi Takikawa, Hitoshi Ue, Kazuki Shimizu and Yoshito Umeda.
Torsion Fracture of Carbon Nanocoils
Journal of Applied Physics, 112, 084311 (2012).
Digital Object Identifier (DOI): 10.1063/1.4758921
Department of Electrical and Electronic information Engineering, Toyohashi University of Technology.
Department website: www.tut.ac.jp/english/introduction/department02.html

####

About Toyohashi University of Technology
Founded in 1976, Toyohashi University of Technology is a vibrant modern institute with research activities reflecting the modern era of advanced electronics, engineering, and life sciences.

For more information, please click here

Contacts:
Toyohashi University of Technology
1-1 Hibarigaoka, Tempaku
Toyohashi, Aichi Prefecture, 441-8580, JAPAN
Inquiries: International Affairs Division

TEL: +81-532-44-6577
or +81-532-44-6546
FAX: +81-532-44-6557

Copyright © Toyohashi University of Technology

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Iranian Researchers Synthesize Stable Ceramic Nanopowders at Room Temperature September 20th, 2014

Arrowhead to Present at BioCentury's NewsMakers in the Biotech Industry Conference September 19th, 2014

SouthWest NanoTechnologies (SWeNT) Receives NIST Small Business Innovation Research (SBIR) Phase 1 Award to Produce Greater than 99% Semiconducting Single-Wall Carbon Nanotubes September 19th, 2014

Toward optical chips: A promising light source for optoelectronic chips can be tuned to different frequencies September 19th, 2014

Imaging

IEEE International Electron Devices Meeting To Celebrate 60th Anniversary as The Leading Technical Conference for Advanced Semiconductor Devices September 18th, 2014

FEI Opens New Technology Center in Czech Republic: FEI expands its presence in Brno with the opening of a new, larger facility September 18th, 2014

New NPZ100-403 Piezo Stage from nPoint Inc. September 17th, 2014

New non-invasive technique could revolutionize the imaging of metastatic cancer September 17th, 2014

Discoveries

Iranian Scientists Separate Zinc Ion at Low Concentrations September 20th, 2014

Iranian Researchers Synthesize Stable Ceramic Nanopowders at Room Temperature September 20th, 2014

Toward optical chips: A promising light source for optoelectronic chips can be tuned to different frequencies September 19th, 2014

New research points to graphene as a flexible, low-cost touchscreen solution September 19th, 2014

Announcements

Iranian Scientists Separate Zinc Ion at Low Concentrations September 20th, 2014

Arrowhead to Present at BioCentury's NewsMakers in the Biotech Industry Conference September 19th, 2014

SouthWest NanoTechnologies (SWeNT) Receives NIST Small Business Innovation Research (SBIR) Phase 1 Award to Produce Greater than 99% Semiconducting Single-Wall Carbon Nanotubes September 19th, 2014

Toward optical chips: A promising light source for optoelectronic chips can be tuned to different frequencies September 19th, 2014

Tools

IEEE International Electron Devices Meeting To Celebrate 60th Anniversary as The Leading Technical Conference for Advanced Semiconductor Devices September 18th, 2014

FEI Opens New Technology Center in Czech Republic: FEI expands its presence in Brno with the opening of a new, larger facility September 18th, 2014

New NPZ100-403 Piezo Stage from nPoint Inc. September 17th, 2014

Researchers Create World’s Largest DNA Origami September 11th, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE