Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Advanced Origami: Nanostructures From Flowers to Boxes

Scanning electron microscopic (SEM) images: a) Self-rolling strips of different widths; b) metallic microflower; c) trapped microparticles of lactose in self-organized metallic structures (scale bar is 4 μm).
Scanning electron microscopic (SEM) images: a) Self-rolling strips of different widths; b) metallic microflower; c) trapped microparticles of lactose in self-organized metallic structures (scale bar is 4 μm).

Abstract:
Self-organising complex 3D structures on the nanometer scale hold tremendous promise in wide-ranging nanotechnological devices with important optical and biological applications. One of the key challenges facing researchers, however, lies in developing a fabrication process with extremely high precision, control, and reproducibility.

Advanced Origami: Nanostructures From Flowers to Boxes

Germany | Posted on October 11th, 2012

A team from the Aalto University in Finland in collaboration with the University of Washington has made an important breakthrough utilising a phenomena that can be commonly observed outside the laboratory in the natural world, from the curling of flowers to the opening of seed capsules in ice plants: deformation through stress-relaxation. As reported in Advanced Materials, the researchers (K. Chalapat, N. Chekurov, H. Jiang, J. Li, B. Parviz and G. S. Paraoanu) from Aalto University have demonstrated how two different techniques, namely, reactive ion etching and focused ion beam, can be used to induce stress at defined locations on very nanometer-sized polycrystalline metal films, ultimately enabling them to manipulate the films into the desired complex 3D geometries.

Reactive ion etching, a technique commonly used for cleaning silicon wafers, involves exposure to a low-pressure plasma, in which high-energy ions collide and react with the substrate. When this technique is applied to thin strips of metal film on silicon wafer, this results in the insertion of adatoms into grain boundaries within the metal matrix. This induces a compressive stress, which, upon relaxing of the film, causes it to bend (see the figure to the left and the video at the bottom of the page). Interestingly, the extent of bending (radius of curvature) was found to be dependent on the width of the metal, thus permitting control over the final 3D geometry. Exploiting this concept, the team demonstrated a functional microscopic metallic flower-like structure (see below), with the capacity to trap microparticles (as a proof-of-concept, lactose particle were employed).

Using the more well-known process for fabricating defined nanometer-sized structures, focused ion beam (FIB), which involves bombarding the substrate with a beam of gallium ions, the researchers found that nanometallic cantilevers bent strongly toward the incident direction of the ion beam, effectively due to the compressive stress that results from atomic displacement. Moreover, a theoretical treatment showed that for a given material, the amount of bending is exclusively determined by the fluence of beam, meaning that by controlling the strength of the ion source, one can manipulate materials on the nanometer scale with extremely high precision and control. A remarkable example of this in practice is the fabrication of a nanobox (see video).The remarkable precision and control afforded by the novel methods reported here represents an important nanoengineering advance with far-reaching and exciting future applications.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

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 Links

Link to the original paper on Wiley Online Library:

Related News Press

News and information

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

New drug-delivery approach holds potential for treating obesity May 2nd, 2016

Videos/Movies

WiFi capacity doubled at less than half the size: Columbia Engineers develop the first on-chip RF circulator that doubles WiFi speeds with a single antenna -- could transform telecommunications April 18th, 2016

First-ever videos show how heat moves through materials at the nanoscale and speed of sound: Groundbreaking observations could help develop better, more efficient materials for electronics and alternative energy April 16th, 2016

Nanotubes assemble! Rice introduces 'Teslaphoresis' Reconfigured Tesla coil aligns, electrifies materials from a distance April 15th, 2016

Record-breaking steel could be used for body armor, shields for satellites April 7th, 2016

Possible Futures

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

Making invisible physics visible: The Jayich Lab has created a new sensor technology that captures nanoscale images with high spatial resolution and sensitivity May 2nd, 2016

Self Assembly

Searching for a nanotech self-organizing principle May 1st, 2016

Researchers create artificial protein to control assembly of buckyballs April 27th, 2016

Brookhaven's Oleg Gang Named a Battelle 'Inventor of the Year': Recognized for work using DNA to guide and regulate the self-assembly of nanoparticles into clusters and arrays with controllable properties April 25th, 2016

Researchers develop new semiconducting polymer for forthcoming flexible electronics April 21st, 2016

Discoveries

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

Non-animal approach to predict impact of nanomaterials on human lung published Archives of Toxicology publishes workshop recommendations May 2nd, 2016

Announcements

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

New drug-delivery approach holds potential for treating obesity May 2nd, 2016

Research partnerships

Making invisible physics visible: The Jayich Lab has created a new sensor technology that captures nanoscale images with high spatial resolution and sensitivity May 2nd, 2016

Cooling graphene-based film close to pilot-scale production April 30th, 2016

Personal cooling units on the horizon April 29th, 2016

Exploring phosphorene, a promising new material April 29th, 2016

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