Navigation Links
Copper shines as flexible conductor
Date:8/29/2014

Bend them, stretch them, twist them, fold them: modern materials that are light, flexible and highly conductive have extraordinary technological potential, whether as artificial skin or electronic paper.

Making such concepts affordable enough for general use remains a challenge but a new way of working with copper nanowires and a PVA "nano glue" could be a game-changer.

Previous success in the field of ultra-lightweight "aerogel monoliths" has largely relied on the use of precious gold and silver nanowires.

By turning instead to copper, both abundant and cheap, researchers at Monash University and the Melbourne Centre for Nanofabrication have developed a way of making flexible conductors cost-effective enough for commercial application.

"Aerogel monoliths are like kitchen sponges but ours are made of ultra fine copper nanowires, using a fabrication process called freeze drying," said lead researcher Associate Professor Wenlong Cheng, from Monash University's Department of Chemical Engineering.

"The copper aerogel monoliths are conductive and could be further embedded into polymeric elastomers extremely flexible, stretchable materials to obtain conducting rubbers."

Despite its conductivity, copper's tendency to oxidation and the poor mechanical stability of copper nanowire aerogel monoliths mean its potential has been largely unexplored.

The researchers found that adding a trace amount of poly(vinyl alcohol) (PVA) to their aerogels substantially improved their mechanical strength and robustness without impairing their conductivity.

What's more, once the PVA was included, the aerogels could be used to make electrically conductive rubber materials without the need for any prewiring. Reshaping was also easy.

"The conducting rubbers could be shaped in arbitrary 1D, 2D and 3D shapes simply by cutting, while maintaining the conductivities," Associate Professor Cheng said.

The versatility extends to the degree of conductivity. "The conductivity can be tuned simply by adjusting the loading of copper nanowires," he said. "A low loading of nano wires would be appropriate for a pressure sensor whereas a high loading is suitable for a stretchable conductor."

Affordable versions of these materials open up the potential for use in a range of new-generation concepts: from prosthetic skin to electronic paper, for implantable medical devices, and for flexible displays and touch screens.

They can be used in rubber-like electronic devices that, unlike paper-like electronic devices, can stretch as well as bend. They can also be attached to topologically complex curved surfaces, serving as real skin-like sensing devices, Associate Professor Cheng said.

In their report, published recently in ACS Nano, the researchers noted that devices using their copper-based aerogels were not quite as sensitive as those using gold nanowires, but had many other advantages, most notably their low-cost materials, simpler and more affordable processing, and great versatility.


'/>"/>

Contact: Glynis Smalley
glynis.smalley@monash.edu
61-408-027-848
Monash University
Source:Eurekalert  

Related biology news :

1. Maize and bacteria: A 1-2 punch knocks copper out of stamp sand
2. 2-proton bit controlled by a single copper atom
3. How the cells remove copper
4. Copper intake makes tumors breathe
5. Futuristic copper foam batteries get more bang for the buck
6. Elevated levels of copper in amyloid plaques associated with neurodegeneration in mouse models of AD
7. After millennia of mining, copper nowhere near peak
8. New study shows how copper restricts the spread of global antibiotic-resistant infections
9. Scripps Research Institute scientists show copper facilitates prion disease
10. Coppers previously unknown exit strategy
11. Copper making salmon prone to predators
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Copper shines as flexible conductor
(Date:3/7/2017)... 7, 2017 Brandwatch , the leading social intelligence ... Prince,s Trust to uncover insights to support its reporting, help ... The UK,s leading youth charity will be using Brandwatch Analytics ... get a better understanding of the topics and issues that are ... ...
(Date:3/2/2017)... 2, 2017 Summary This report provides ... its partnering interests and activities since 2010. ... Read the full report: ... since 2010 report provides an in-depth insight into the partnering ... On demand company reports are prepared upon purchase ...
(Date:3/2/2017)... 2017 Australian stem cell and regenerative medicine ... signed an agreement with the Monash Lung Biology Network, ... Institute and Department of Pharmacology at Monash University, ... study to support the use of Cymerus™ mesenchymal stem ... Asthma is a chronic, long term lung condition ...
Breaking Biology News(10 mins):
(Date:3/22/2017)... 22, 2017 MarketNewsUpdates.com News Commentary  ... The traditional ... being pressured as of late due to the rise of ... has a dramatic impact on patient,s quality of life as ... for identifying new forms of opioid formulations that prevent abuse. ...
(Date:3/22/2017)... , March 22, 2017   Boston Biomedical , ... therapeutics designed to target cancer stemness pathways, today announced ... Andrews as Chief Executive Officer, effective April 24, ... Chiang J. Li , M.D., FACP, who has led ... ago. Under his leadership, Boston Biomedical has grown from ...
(Date:3/22/2017)... ... ... Premier executive recruitment firm, Slone Partners, is proud to have been named a Top ... Hunt Scanlon Media is one of the most respected life science publications in the ... sector. , “It is a great honor for Slone Partners to be part of ...
(Date:3/22/2017)... ... March 21, 2017 , ... Proper glycosylation is critical for ... increase and/or decrease in antibody-dependent cellular cytotoxicity or complement-dependent cytotoxicity, there is a ... , To meet this demand, the team at SCIEX has developed a ...
Breaking Biology Technology: