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

Quantum states in a nano-object manipulated using a mechanical system August 3rd, 2015

Nanoparticles used to breach mucus barrier in lungs: Proof-of-concept study conducted in mice a key step toward better treatments for lung diseases August 3rd, 2015

Promising Step Taken in Iran towards Treatment of Spinal Cord Injury August 3rd, 2015

Diagnosis of Salmonella Bacterium-Caused Food Poisoning by Biosensors August 3rd, 2015

Videos/Movies

Take a trip through the brain July 30th, 2015

Caught on camera: The first glimpse of powerful nanoparticles July 17th, 2015

A most singular nano-imaging technique: Berkeley Lab's SINGLE provides images of individual nanoparticles in solution July 16th, 2015

A 'movie' of ultrafast rotating molecules at a hundred billion per second: A quantum wave-like nature was successfully observed in rotating nitrogen molecules July 4th, 2015

Possible Futures

Nanofiltration Membrane Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Nanozirconia Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Self-Healing Nano Anti-rust Coatings Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Nano Spray Instrument Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Self Assembly

Self-assembling, biomimetic membranes may aid water filtration August 1st, 2015

New computer model could explain how simple molecules took first step toward life: Two Brookhaven researchers developed theoretical model to explain the origins of self-replicating molecules July 28th, 2015

Spintronics: Molecules stabilizing magnetism: Organic molecules fixing the magnetic orientation of a cobalt surface/ building block for a compact and low-cost storage technology/ publication in Nature Materials July 25th, 2015

Imec introduces self-assembled monomolecular organic films to seal ultra-porous low- k materials: Method prevents leakage of barrier precursors during the interconnect metallization scheme July 15th, 2015

Discoveries

Small tilt in magnets makes them viable memory chips August 3rd, 2015

Better together: Graphene-nanotube hybrid switches August 3rd, 2015

Vaccine with virus-like nanoparticles effective treatment for RSV, study finds August 3rd, 2015

MIPT researchers clear the way for fast plasmonic chips August 3rd, 2015

Announcements

Quantum states in a nano-object manipulated using a mechanical system August 3rd, 2015

Nanoparticles used to breach mucus barrier in lungs: Proof-of-concept study conducted in mice a key step toward better treatments for lung diseases August 3rd, 2015

Promising Step Taken in Iran towards Treatment of Spinal Cord Injury August 3rd, 2015

Diagnosis of Salmonella Bacterium-Caused Food Poisoning by Biosensors August 3rd, 2015

Research partnerships

University of Puerto Rico announces August 11th as the launch date for their NASA mission to look for life in space XEI reports August 3rd, 2015

Newly-Developed Polymers Control Size of Nanoparticles during Production Process July 30th, 2015

Meet the high-performance single-molecule diode: Major milestone in molecular electronics scored by Berkeley Lab and Columbia University team July 29th, 2015

Spintronics: Molecules stabilizing magnetism: Organic molecules fixing the magnetic orientation of a cobalt surface/ building block for a compact and low-cost storage technology/ publication in Nature Materials July 25th, 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