Featured Research

from universities, journals, and other organizations

Air quality measurements: New manufacturing method for nano gas sensors opens doors

Date:
August 19, 2013
Source:
TU Graz
Summary:
Nano-sized gas sensors in mobile telephones that measure the atmospheric humidity are nothing new as such. However, so far it was necessary to rely on complex lithographic methods to produce the required nano-structure of the sensors, and they have the added disadvantage that they do not work well on uneven surfaces. A relatively new approach is the focused electron beam deposition method – in which the nano-structures can be “written directly” without requiring any pre- or after-treatment.

Nano-sized gas sensors in mobile telephones that measure the atmospheric humidity are nothing new as such. However, so far it was necessary to rely on complex lithographic methods to produce the required nano-structure of the sensors, and they have the added disadvantage that they do not work well on uneven surfaces. A relatively new approach is the focussed electron beam deposition method -- FEBID for short -- in which the nano-structures can be "written directly" without requiring any pre- or after-treatment. Following the requisite fundamental research, application-oriented nano-structures have only been produced by FEBID recently on a trial basis.

Together with colleagues from the University of Graz, Harald Plank from the Institute of Electron Microscopy and Nanoanalysis at Graz University of Technology is one of the pioneers of this manufacturing method. The team developed the world's first FEBID based nanoscopic gas sensor.

Nano sensors for all applications

The so far unique nano sensor is not only exceptionally powerful and fast to manufacture, it also has great potential. The totally new manufacturing method also works on uneven surfaces -- and as the properties of nano-structures depend crucially on the material, this opens the door to completely new applications.

According to Plank, the team is now planning to functionalize nanoscopic surfaces with the aim of developing very specialized nano sensors that can be integrated in a mobile telephone and are capable of measuring not just the humidity of the air, but also the CO or sulphur content. This new type of nano gas sensor would be particularly interesting for environmentally relevant air quality measurements -- for instance for the measurement of exhaust fumes from motor vehicles. Even the measurement of toxic agents with mobile terminals is conceivable. Finally, a huge advantage is that nano gas sensors manufactured by means of the new method can also be used in liquid environments. As Plank explains, this makes them fit for medical applications -- for instance the direct measurement of individual blood components.


Story Source:

The above story is based on materials provided by TU Graz. Note: Materials may be edited for content and length.


Journal Reference:

  1. Florian Kolb, Kerstin Schmoltner, Michael Huth, Andreas Hohenau, Joachim Krenn, Andreas Klug, Emil J W List, Harald Plank. Variable tunneling barriers in FEBID based PtC metal-matrix nanocomposites as a transducing element for humidity sensing. Nanotechnology, 2013; 24 (30): 305501 DOI: 10.1088/0957-4484/24/30/305501

Cite This Page:

TU Graz. "Air quality measurements: New manufacturing method for nano gas sensors opens doors." ScienceDaily. ScienceDaily, 19 August 2013. <www.sciencedaily.com/releases/2013/08/130819090123.htm>.
TU Graz. (2013, August 19). Air quality measurements: New manufacturing method for nano gas sensors opens doors. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2013/08/130819090123.htm
TU Graz. "Air quality measurements: New manufacturing method for nano gas sensors opens doors." ScienceDaily. www.sciencedaily.com/releases/2013/08/130819090123.htm (accessed October 21, 2014).

Share This



More Matter & Energy News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Newsy (Oct. 21, 2014) If you've ever watched "Back to the Future Part II" and wanted to get your hands on a hoverboard, well, you might soon be in luck. Video provided by Newsy
Powered by NewsLook.com
Robots to Fly Planes Where Humans Can't

Robots to Fly Planes Where Humans Can't

Reuters - Innovations Video Online (Oct. 21, 2014) Researchers in South Korea are developing a robotic pilot that could potentially replace humans in the cockpit. Unlike drones and autopilot programs which are configured for specific aircraft, the robots' humanoid design will allow it to fly any type of plane with no additional sensors. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Graphene Paint Offers Rust-Free Future

Graphene Paint Offers Rust-Free Future

Reuters - Innovations Video Online (Oct. 21, 2014) British scientists have developed a prototype graphene paint that can make coatings which are resistant to liquids, gases, and chemicals. The team says the paint could have a variety of uses, from stopping ships rusting to keeping food fresher for longer. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
China Airlines Swanky New Plane

China Airlines Swanky New Plane

Buzz60 (Oct. 21, 2014) China Airlines debuted their new Boeing 777, and it's more like a swanky hotel bar than an airplane. Enjoy high-tea, a coffee bar, and a full service bar with cocktails and spirits, and lie-flat in your reclining seats. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins