Novel Semiconducting Phase of Amorphous Carbon Nickel Composite Films

2006 ◽  
Vol 910 ◽  
Author(s):  
Somnath Bhattacharyya ◽  
S. J. Henley ◽  
N. P. Blanchard ◽  
S. R. P. Silva
Keyword(s):  
Laser Ablation ◽  
Fermi Level ◽  
Electronic Properties ◽  
Valence Band ◽  
Density Of States ◽  
Amorphous Carbon ◽  
Composite Films ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Diamond Like Carbon

AbstractA homogeneously mixed phase of carbon and 10% nickel yielding amorphous carbon-nickel composite (a-C-Ni) films is prepared by an excimer UV pulsed laser ablation. Conductivity study of these films shows a nearly activated conduction. Also a saturation of conductivity below a temperature of 25 K explains the presence of an additional density of states at the Fermi level in these samples. Our experiments demonstrate a very different behaviour of electronic properties of these novel materials compared to undoped diamond-like carbon (DLC) films, which was directly confirmed using valence band spectroscopy.

Study of plasma expansion induced by femtosecond pulsed laser ablation and deposition of diamond-like carbon films

2003 ◽  
Vol 208-209 ◽  
pp. 553-560 ◽  
Author(s):  
A.-S. Loir ◽  
F. Garrelie ◽  
J.-L. Subtil ◽  
F. Goutaland ◽  
M. Belin ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Plasma Expansion ◽  
Femtosecond Pulsed Laser

EFFECT OF HELIUM GAS ON THE DEPOSITION OF DIAMOND LIKE CARBON THIN FILMS BY PULSED LASER ABLATION

2002 ◽  
Vol 16 (06n07) ◽  
pp. 871-875 ◽  
Author(s):  
M. Rusop ◽  
S. M. Mominuzzaman ◽  
T. Soga ◽  
T. Jimbo ◽  
M. Umeno
Keyword(s):  
Thin Films ◽  
Electrical Resistivity ◽  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Diamond Like Carbon ◽  
Spectroscopic Techniques ◽  
Optical Gap ◽  
Helium Gas ◽  
Carbon Thin Films

We have studied the effects of ambient Helium gas pressure on the optical, structural and physical properties of the diamond like carbon thin films using a camphoric carbon (CC) soot target, deposited by pulsed laser ablation. Both the optical gap and electrical resistivity are found to increase with 2.6 Torr leads to a decre ase in optical gap and electrical resistivity. The films are further investigated by different spectroscopic techniques such as, Raman, XPS and FTIR spectroscopy, and surface morphological techniques like SEM and AFM. Improvement of the opto-electrical and structural properties of the diamondlike carbonaceous films deposited in helium environment using CC soot target reveal different behaviour than reported earlier.

Towards the deposition of tetrahedral diamond-like carbon films on hip joints by femtosecond pulsed laser ablation

2004 ◽  
Vol 188-189 ◽  
pp. 728-734 ◽  
Author(s):  
A.S. Loir ◽  
F. Garrelie ◽  
C. Donnet ◽  
F. Rogemond ◽  
J.L. Subtil ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Hip Joints ◽  
Femtosecond Pulsed Laser

Nickel-incorporated amorphous carbon film deposited by femtosecond pulsed laser ablation

2005 ◽  
Vol 482 (1-2) ◽  
pp. 287-292 ◽  
Author(s):  
N. Benchikh ◽  
F. Garrelie ◽  
C. Donnet ◽  
B. Bouchet-Fabre ◽  
K. Wolski ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Amorphous Carbon ◽  
Carbon Film ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Amorphous Carbon Film ◽  
Femtosecond Pulsed Laser
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