Palladium Nanoparticle Electrodeposition on Nanotubes Results in New Flexible Hydrogen Sensors

Aug 27, 2007
Palladium Nanoparticle Electrodeposition on Nanotubes Results in New Flexible Hydrogen Sensors

In comparison to current hydrogen sensors, which are rigid and use expensive, pure palladium, Argonne's new sensors are flexible and use single-walled carbon nanotubes (SWNTs) as supports to improve efficiency and reduce cost.

Yugang Sun and Hau Wang from ANL's Center for Nanoscale Materials fabricated the new sensing devices by using a two-step process of chemical vapor deposition and dry transfer printing. This process allows the film of nanotubes to form on the plastic, after which the palladium nanoparticles are deposited on the SWNTs to make the sensors.

According to Sun, these sensors exhibit excellent sensing performance in terms of high sensitivity, fast response time, and quick recovery, while the use of plastic sheets reduces their overall weight and increases their mechanical flexibility and shock resistance.

Flexible hydrogen sensors show a change of 75% in their resistance when exposed to hydrogen at a concentration of 0.05% in air. The devices can detect the presence of 1% hydrogen at room temperature in 3 seconds.

This work is presented in Applied Physics Letters, 90, 213107 (2007).

Source: ANL

Explore further: 'Nanomotor lithography' answers call for affordable, simpler device manufacturing

add to favorites email to friend print save as pdf

Related Stories

As fuel cells evolve, a role emerges for palladium

Mar 18, 2013

(Phys.org) —Researchers at Yale University have taken another step toward the development of low-temperature, lower-cost alkaline fuel cells, which are battery-like devices that convert oxygen and hydrogen ...

A tiny electrode fuels smart bandage technology

Dec 04, 2012

(Phys.org)—Band-​​aid tech­nology has made incre­mental improve­ments in the years since its com­mer­cial intro­duc­tion in the late 1960s, the most impor­tant of which has been the incor­po­ra­tion ...

Tiny tubes and rods show promise as catalysts, sunscreen

Sep 10, 2007

Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have developed new ways to make or modify nanorods and nanotubes of titanium oxide, a material used in a variety of industrial and ...

Recommended for you

A quantum leap in nanoparticle efficiency

2 hours ago

(Phys.org) —New research has unlocked the secrets of efficiency in nanomaterials, that is, materials with very tiny particles, which will improve the future development of chemical sensors used in chemical ...

Gold nanoparticle chains confine light to the nanoscale

Oct 29, 2014

A multidisciplinary team at the Centre d'Elaboration de Matériaux et d'Etudes Structurales (CEMES, CNRS), working in collaboration with physicists in Singapore and chemists in Bristol (UK), have shown that ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.