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 Could this protein protect people against coronary artery disease?
17.11.2017 | University of North Carolina Health Care

nachricht Microbial resident enables beetles to feed on a leafy diet
17.11.2017 | Max-Planck-Institut für chemische Ökologie

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

NASA detects solar flare pulses at Sun and Earth

17.11.2017 | Physics and Astronomy

NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures

17.11.2017 | Health and Medicine

The importance of biodiversity in forests could increase due to climate change

17.11.2017 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>