Subscribe to our free daily newsletters
  Nano Technology News  




Subscribe to our free daily newsletters



NANO TECH
Nanocage surfaces get 'makeover' in room temperature
by Staff Writers
Kyoto, Japan (SPX) Apr 05, 2016


Kyoto University team exploit preexisting crystal "molds" to make copper oxide nanocrystals morph into hollow copper sulfide nanocages through anion exchange, and ultimately into cadmium sulfide and zinc sulfide nanocages. Image courtesy Kyoto University. For a larger version of this image please go here.

Kyoto University researchers have discovered a way of replacing surface ions of copper oxide nanocrystals at ambient conditions - a feat that will make nanocage production considerably simpler.

Ionic semiconductor nanocages can be used as photoelectric conversion materials like those used in solar panels. Like a cage in the literal sense, nanocages can also encapsulate drugs and enzymes, promising further developments for targeted drug delivery.

The new method devised by Hsin-Lun Wu and colleagues at Kyoto University exploits preexisting crystal "molds" to make copper oxide nanocrystals morph into hollow copper sulfide nanocages through anion exchange, and ultimately into cadmium sulfide and zinc sulfide nanocages.

Nanocages appear in multiple crystal systems depending on their shapes, including cubic and hexagonal systems. Previously, in order to derive hexagonal zinc sulfide nanocages, it was necessary to apply high heat up to around 1000 degrees celcius to zinc sulfide nanocages with a cubic system.

With the Kyoto team's method, all it takes is to expose hexahedral or dodecahedral copper oxide nanocrystals to sodium sulfide; with this process, anions on the surface get replaced, transforming the surface of the nanocrystal to copper sulfide.

In addition, the copper oxide in the inside dissolves so as to create a hollow nanocage. When these copper sulfide nanocages are exposed to cadmium nitrate or zinc nitrate, the copper cations become replaced to yield cadmium sulfide nanocages and zinc sulfide nanocages, respectively.

The authors write that such chemical conversions can "overcome the difficulties associated with controlling the size, shape, chemical composition, and crystal structure."

"We never expected that this could be done in such a simple step," says Toshiharu Teranishi, a senior author of the study.

The team hopes to test this method on nanocrystals with various ionic makeup. "Ionic nanocrystals come in so many flavors," said Teranishi. "We're working to find out whether this could be applied as a general method for not just copper oxide nanocrystals, but for other ionic nanocrystals as well."

The paper "Formation of pseudomorphic nanocages from Cu2O nanocrystals through anion exchange reactions" appeared March 18, 2016 in Science, with doi: 10.1126/science.351.6279.1276-l


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

.


Related Links
Kyoto University
Nano Technology News From SpaceMart.com
Computer Chip Architecture, Technology and Manufacture






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

Previous Report
NANO TECH
Heat and light get larger at the nanoscale
New York NY (SPX) Apr 04, 2016
In a new study recently published in Nature Nanotechnology, researchers from Columbia Engineering, Cornell, and Stanford have demonstrated heat transfer can be made 100 times stronger than has been predicted, simply by bringing two objects extremely close - at nanoscale distances - without touching. Led by Columbia Engineering's Michal Lipson and Stanford Engineering's Shanhui Fan, the team used ... read more


NANO TECH
Australia says possible MH370 debris found on Mauritius

Profits soar at China's big three airlines

UK defence chief says Qatar warplane deal 'on the table'

New material could make aircraft deicers a thing of the past

NANO TECH
China's 1st space lab Tiangong-1 ends data service

China's aim to explore Mars

China to establish first commercial rocket launch company

China's ambition after space station

NANO TECH
Apple-FBI clash ends in stalemate

FBI hacks attacker's iPhone, drops Apple suit

Apple says San Bernardino iPhone could affect NY case

Chinese media laud hacker for US spying

NANO TECH
Moon Mission: A Blueprint for the Red Planet

The Lunar Race That Isn't

Earth's moon wandered off axis billions of years ago

Ancient Polar Ice Reveals Tilting of Earth's Moon

NANO TECH
Heat and light get larger at the nanoscale

Nanolight at the edge

Nano-enhanced textiles clean themselves with light

Nature-inspired nanotubes that assemble themselves, with precision

NANO TECH
BAE Systems modernizing Sweden's CV90 vehicles

Defense contractors pay $8M to settle defective flares allegations

U.S. Army issues initial order for Humvee replacement vehicles

Oshkosh recapitalizing Army's tactical trucks

NANO TECH
Heat and light get larger at the nanoscale

Nanolight at the edge

Nano-enhanced textiles clean themselves with light

Nature-inspired nanotubes that assemble themselves, with precision

NANO TECH
Robot Technology Set to Invade Earth

Moving microswimmers with tiny swirling flows

Microsoft grounds foul-mouthed teen-speak bot

Robot learning companion offers custom-tailored tutoring




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement