Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A versatile method to pattern functionalized nanowires

15.09.2016

A team of researchers from Hokkaido University has developed a versatile method to pattern the structure of “nanowires,” providing a new tool for the development of novel nanodevices.

There has been considerable interest worldwide in the patterning of functionalized nanowires—which excel both in semiconductivity and as catalyzers—due to the potential application of such materials in nanodevice construction. Establishing a versatile approach to make functionalized nanowires, with a particular need to controlling spatial patterning, has been seen as essential.


(Left) Growth of tandem fluorescent fibrils. Scale bar = 20 micrometers. (Right) Fibrils extended from gold nanoparticles placed on the surface of a substrate. Scale bar = 1 micrometer.

The team, led by Professor Kazuyasu Sakaguchi of the Faculty of Science’s Department of Chemistry, had previously developed an effective method, named structure-controllable amyloid peptides (SCAPs), to control self-assembly of amyloid peptides, which are the building blocks of nanowires and also known as the causative molecule for Alzheimer’s disease.

In the latest research, the team combined the SCAPs with templated fibril growth—a distinctive quality of amyloid peptides—and succeeded in the formation of nanowires with tandem domain structures or a single nanowire extending from a specific starting point.

To create the tandem structure, the SCAPs method was used to make initial amyloid fibrils—marked by green fluorescence—which were used as a template, and to allow another type of amyloid peptide—marked by red fluorescence—extend from the starting fibrils.

Analysis showed a 67% tandem yield, three times higher than the efficiency yield of previous studies. Moreover, a few geometrical patterns could be discerned in the tandem structures, the proportion of which could be controlled by adjusting the peptide mix ratio.

Furthermore, by attaching template fibrils to gold nanoparticles placed on substrate surface through molecular recognition, then allowing new fibrils to extend from the template, the researchers succeeded in forming a single nanowire in a specific location. Achieving this kind of advanced pattern control is a world-first.

This method is applicable to the self-assembly of nanowires for nanoelectrodes created by lithography. “It could also be used to prepare a wide variety of fibril patterns and hence open up new avenues for the development of novel self-assembled nanodevices,” Professor Sakaguchi said.

Contacts:
Professor Kazuyasu Sakaguchi
Department of Chemistry, Faculty of Science
Hokkaido University
kazuyasu[at]sci.hokudai.ac.jp
http://wwwchem.sci.hokudai.ac.jp/~biochem/english/index.html

Naoki Namba (Media Officer)
Global Relations Office
Office of International Affairs
Hokkaido University
pr[at]oia.hokudai.ac.jp
Tel: +81-11-706-8034

Associated links

Journal information

Sakai H. et al., Patterning nanofibrils through the templated growth of multiple modified amyloid peptides, Scientific Reports, August 25, 2016. DOI: 10.1038/srep31993

Funding information

This work was supported in part by a Grant-in-Aid for Scientific Research (B) (No. 24310152) from the Japan Society for the Promotion of Science (JSPS) (to K.S.), as well as a Research Fellowship from the JSPS for Young Scientists (No. 23-7100) (to H.S.).

Hokkaido University | Research SEA
Further information:
http://www.researchsea.com

More articles from Life Sciences:

nachricht When Air is in Short Supply - Shedding light on plant stress reactions when oxygen runs short
23.03.2017 | Institut für Pflanzenbiochemie

nachricht WPI team grows heart tissue on spinach leaves
23.03.2017 | Worcester Polytechnic Institute

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

When Air is in Short Supply - Shedding light on plant stress reactions when oxygen runs short

23.03.2017 | Life Sciences

Researchers use light to remotely control curvature of plastics

23.03.2017 | Power and Electrical Engineering

Sea ice extent sinks to record lows at both poles

23.03.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>