Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Synthetic cricket pricks up its ‘ears’

Abstract:
The tiny hairs on the abdomen of a cricket have inspired researchers at the University of Twente, to make a new type of sensor which is ultra sensitive to air flows. These synthetic cricket hairs can now also be tuned very precisely for a certain range of frequencies: the hairs are 10 times more sensitive in this range. The researchers of the MESA+ Institute for Nanotechnology are presenting these new results in the scientific journal Applied Physics Letters.

Synthetic cricket pricks up its ‘ears’

The Netherlands | Posted on December 13th, 2011

Just as you always hear your own name if it is spoken at a busy gathering, these synthetic cricket hairs also suddenly become more sensitive to a specific frequency of air flow. The hair itself does not have to be modified for this, the enhanced sensitivity is achieved by adjusting its spring stiffness electronically.

Biomimicry

The synthetic cricket hair is an example of biomimicry, the hairs on a cricket's abdomen - on the projections known as 'cerci' - form the source of inspiration. These hairs enable the cricket to feel/hear the approach of its enemies and estimate their distance and direction unerringly. These characteristics can be simulated by making a hair that is suspended in a flexible microsystem. The hair is made of polymer SU8, is 0.9 millimetre in length and is thicker at the base than at the top. The smallest movements are registered by the flexibly-suspended plate to which the hair is attached; the electrical capacity changes as a result and gives a measure for the movement.

You could enhance sensitivity by using another type of hair that is not as stiff, but Harmen Droogendijk discovered that it is also possible to adjust the spring stiffness of the hair in question electronically. He investigated the alternating voltage needed to get the hair, or spring, 'limp' at the required moment, thus making it extra sensitive to the related frequencies. The effect is substantial: a hair is 10 times more sensitive at the adjusted frequency.

This makes the sensor more easily applicable without having to alter the design. Potential applications include direction sensors used by robots and the study of very specific air flows. In the longer term, the synthetic hairs could also be used in hearing aids. The hairs can be made extra sensitive to certain frequencies in all these applications.

This research is being carried out by the Transducers Science and Technology group of the MESA+ Institute for Nanotechnology. It is being supervised by Prof. Gijs Krijnen and is part of BioEARS, a VICI project financed by the Technology Foundation STW.

The article 'Non-resonant parametric amplification in biomimetic hair flow sensors: selective gain and tunable filtering' written by H. Droogendijk, C.M. Bruinink, R.G.P. Sanders and G.J.M. Krijnen will appear in Applied Physics Letters and has already been published online by the journal.

####

For more information, please click here

Contacts:
Wiebe van der Veen
tel +31 (0)53 4894244

Copyright © University of Twente

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

Nanotech could rid cattle of ticks, with less collateral damage September 1st, 2015

Scientists 'squeeze' light one particle at a time: A team of scientists have measured a bizarre effect in quantum physics, in which individual particles of light are said to have been 'squeezed' -- an achievement which at least one textbook had written off as hopeless September 1st, 2015

Using ultrathin sheets to discover new class of wrapped shapes: UMass Amherst materials researchers describe a new regime of wrapped shapes August 31st, 2015

New material science research may advance tech tools August 31st, 2015

Sensors

Successful boron-doping of graphene nanoribbon August 27th, 2015

Nanotechnology that will impact the Security & Defense sectors to be discussed at NanoSD2015 conference August 25th, 2015

High Precision, High Stability XYZ Microscope Stages, with Capacitive Feedback August 18th, 2015

Setting ground rules for nanotechnology research: Two new projects set the stage for nanotechnology research to move into Big Data August 18th, 2015

Discoveries

Scientists 'squeeze' light one particle at a time: A team of scientists have measured a bizarre effect in quantum physics, in which individual particles of light are said to have been 'squeezed' -- an achievement which at least one textbook had written off as hopeless September 1st, 2015

Using ultrathin sheets to discover new class of wrapped shapes: UMass Amherst materials researchers describe a new regime of wrapped shapes August 31st, 2015

An engineered surface unsticks sticky water droplets August 31st, 2015

New material science research may advance tech tools August 31st, 2015

Announcements

Nanotech could rid cattle of ticks, with less collateral damage September 1st, 2015

Scientists 'squeeze' light one particle at a time: A team of scientists have measured a bizarre effect in quantum physics, in which individual particles of light are said to have been 'squeezed' -- an achievement which at least one textbook had written off as hopeless September 1st, 2015

An engineered surface unsticks sticky water droplets August 31st, 2015

New material science research may advance tech tools August 31st, 2015

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







Car Brands
Buy website traffic