Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Properties revealed of amorphous carbon thin films prepared by electron-gun evaporation

11.11.2005


Massive variations in electrical conductivity observed for amorphous carbon thin films



A great deal of work has been done into understanding the physical properties of amorphous carbon (a-C). These studies have found the relative ratio of different carbon phases strongly determines the physical properties of the material.

In this work, published in AZojomo*, by B. Rebollo-Plata, R. Lozada-Morales, R. Palomino-Merino, J. A. Dávila-PintLe, O. Portillo-Moreno, O. Zelaya-Angel and S. Jiménez-Sandoval from Benemérita Universidad Autónoma de Puebla, a-C thin films grown by electron-gun evaporation (EGE) are studied. There is a limited number of works using the EGE technique to grow a-C films, and with growing interest in carbon based nanotechnology, the researchers believe it is important to widen the knowledge in this direction.


The main experimental parameter varied during growth was the source-substrate distance (SSD), and important changes in the physical properties: vibrational modes, dark conductivity and majority carrier concentration, are studied.

The research revealed that as SSD was altered, along with changes to the make up of the carbon films, there was a dramatic alteration to the electrical conductivity of the samples. The electrical conductivity of the a-C:N sample grown with a SSD of 15.5 cm, was about three orders of magnitude higher than the rest of the samples. However, for films grown with a SSD of 23.5cm the conductivity decreased by nearly seven orders of magnitude.

Dr. Ian Birkby | EurekAlert!
Further information:
http://www.azom.com/Details.asp?ArticleID=3097
http://www.azonetwork.com

More articles from Materials Sciences:

nachricht An innovative high-performance material: biofibers made from green lacewing silk
20.01.2017 | Fraunhofer-Institut für Angewandte Polymerforschung IAP

nachricht Treated carbon pulls radioactive elements from water
20.01.2017 | Rice University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>