Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Assessing an object's consistency without touching it

© Richard Villey and Frédéric Restagno Close up of the Pyrex sphere and Pyrex plane on which the nanometric scale elastic film is deposited. The small drop of liquid that serves as a probe is visible.
© Richard Villey and Frédéric Restagno

Close up of the Pyrex sphere and Pyrex plane on which the nanometric scale elastic film is deposited. The small drop of liquid that serves as a probe is visible.

Abstract:
Two teams of researchers have succeeded in evaluating the rigidity of a material … without touching it! To achieve this feat, physicists from the Laboratoire de Physique de la Matière Condensée et des Nanostructures (CNRS / Université Claude Bernard Lyon 1) and the Laboratoire de Physique des Solides (Université Paris-Sud / CNRS) placed a liquid-where they created a very weak, nanometric scale flow-between the probed object and the "tester". This technique, derived from the latest advances in nano-mechanics, has the advantage of being non-invasive and therefore non-destructive and could significantly improve the testing and analysis of thin, fragile objects such as bubbles or cells. This work is published on-line on June 18, 2012 on the website of the journal Physical Review Letters.

Assessing an object's consistency without touching it

Paris, France | Posted on June 27th, 2012

A simple way of determining whether a body is hard or soft is to touch it with a harder object. The problem with this technique is that it can destroy the item, especially if it is extremely fragile like a bubble or a living cell. Developing a less invasive alternative was therefore vital. To assess the rigidity of an object without touching it, the team of physicists had envisaged blowing on it delicately to check whether this flow of air deformed the material or not. But precisely controlling a flow of air is difficult on account of the vortexes that can form in the air. Hence the idea of using an easier-to-control "nano-flow" of fluid instead.

The researchers tested their technique on a thin elastomer (rubber) film, only several hundreds of nanometers (1) thick. In concrete terms, they placed the film on a rigid glass support and immersed the lot in a mixture of water and glycerol. They then created a very slight displacement of the liquid, near to the film. To generate this nano-flow, the physicists, and more particularly Samuel Leroy who was then working on his PhD at LPMCN (2), had to use a special device, developed in 2000 in the same laboratory (3). It comprises in particular a millimetric Pyrex (special glass) sphere, attached to a rod, which can be finely moved with what is known as a "piezoelectric ceramic" system. It is precisely this tiny glass bead that allows a nano-flow to be created at the surface of an object.

When the sphere comes up very close to the material (0.000001 meters), it pushes the liquid towards the object. This nano-flow generates a very slight pressure on the surface of the material. This force deforms the film very slightly, if it is flexible. On the other hand, if the tested object is completely rigid, the film remains unchanged.

The two teams also discovered that their method can be used to measure the rigidity of an array of bubbles, an element so fragile that touching it would mean destroying it! It is the first time that the possibility of measuring the elastic properties of an object using a nano-flow of fluid has been demonstrated. This initial work opens the way to a new nanometric-scale imaging technique for observing the elastic properties of very thin or thicker objects.

Notes:
(1) 1 nm = 0.000000001 m
(2) Laboratoire de Physique de la Matière Condensée et des Nanostructures (CNRS / Université Claude Bernard Lyon 1)
(3) Apparatus developed during the PhD work of Frédéric Restagno, under the supervision of Elisabeth Charlaix, currently working at the Laboratoire Interdisciplinaire de Physique (CNRS / Université Grenoble 1)

####

Contacts:
Julien Guillaume
+ 33 1 44 96 51 51


CNRS researcher
Frédéric Restagno
T +33 (0)1 69 15 70 78


Elisabeth Charlaix
T +33 (0)4 76 51 49 63


CNRS press officer
Priscilla Dacher
T +33 (0)1 44 96 46 06 l

Copyright © AlphaGalileo

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

Small but heading for the big time: Nanobiotix half year results for the six months ended 30 June 2015, in line with expectations: Major clinical achievements and corporate developments August 28th, 2015

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

Nanolab Technologies LEAPS Forward with High-Performance Analysis Services to the World: Nanolab Orders Advanced Local Electrode Atom Probe (LEAP®) Microscope from CAMECA Unit of AMETEK Materials Analysis Division August 27th, 2015

Physics

Record-high pressure reveals secrets of matter: The most incompressible metal osmium at static pressures above 750 GPa August 25th, 2015

Southampton scientists find new way to detect ortho-para conversion in water August 25th, 2015

Biophysics: Formation of swarms in nanosystems August 18th, 2015

Attosecond physics: Attosecond electron catapult: Physicists from Ludwig-Maximilians-Universität (LMU) in Munich studied the interaction of light with tiny glass particles August 15th, 2015

Discoveries

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

CWRU researchers efficiently charge a lithium-ion battery with solar cell: Coupling with perovskite solar cell holds potential for cleaner cars and more August 27th, 2015

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

Announcements

Small but heading for the big time: Nanobiotix half year results for the six months ended 30 June 2015, in line with expectations: Major clinical achievements and corporate developments August 28th, 2015

A new technique to make drugs more soluble August 28th, 2015

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

Nanolab Technologies LEAPS Forward with High-Performance Analysis Services to the World: Nanolab Orders Advanced Local Electrode Atom Probe (LEAP®) Microscope from CAMECA Unit of AMETEK Materials Analysis Division August 27th, 2015

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

CWRU researchers efficiently charge a lithium-ion battery with solar cell: Coupling with perovskite solar cell holds potential for cleaner cars and more August 27th, 2015

'Diamonds from the sky' approach turns CO2 into valuable products August 19th, 2015

Drexel engineers 'sandwich' atomic layers to make new materials for energy storage August 15th, 2015

Flexible, biodegradable device can generate power from touch (video) August 12th, 2015

Research partnerships

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

Announcing Oxford Instruments and School of Physics signing a Memorandum of Understanding August 26th, 2015

Researchers combine disciplines, computational programs to determine atomic structure August 26th, 2015

Developing Component Scale Composites Using Nanocarbons August 26th, 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