scholarly journals Study of Electrical Conductivity and Microcosmic Structure of Tetrahedral Amorphous Carbon Films Doped by Boron

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Xiaoyan Wang ◽  
Yuqing Zhao
Keyword(s):  
Electrical Conductivity ◽  
Amorphous Carbon ◽  
Photoelectron Spectroscopy ◽  
Carbon Films ◽  
Vacuum Arc ◽  
Diffusion Method ◽  
Electrical Characteristics ◽  
Tetrahedral Amorphous Carbon ◽  
Thermal Diffusion Method ◽  
Filtered Cathodic Vacuum Arc

A type of tetrahedral amorphous carbon (ta-C) film that was doped by boron (ta-C:B) is focused on in this paper. The ta-C film is prepared by filtered cathodic vacuum arc (FCVA) technique and then doped with boron using the thermal diffusion method. Then the microcosmic structure and electrical conductivity of the ta-C are characterized by an X-ray photoelectron spectroscopy (XPS) method and four-probe method, respectively. The results show that the conductivity of ta-C:B is significantly increased; the resistivity decreases from 1.5 × 106 Ω·cm to 350 Ω·cm approximately, while the percentage of sp3bonds in the film is changed from 87% to 60% approximately. It means that this type of film preserved the mechanical characteristics of diamond-like carbon (DLC) films and improved the electrical characteristics greatly at the same time.

FCVA-Synthesized Tetrahedral Amorphous Carbon Films for Biomedical Applications

2007 ◽  
Vol 336-338 ◽  
pp. 1577-1580 ◽  
Author(s):  
Chuan Lin Zheng ◽  
Wu Bao Yang ◽  
X. Chang
Keyword(s):  
Amorphous Carbon ◽  
Biomedical Applications ◽  
Pure Titanium ◽  
Carbon Films ◽  
Vacuum Arc ◽  
Negative Bias Voltage ◽  
Tetrahedral Amorphous Carbon ◽  
In Vitro Measurements ◽  
Filtered Cathodic Vacuum Arc

Tetrahedral amorphous carbon (ta-C) films were deposited onto Si(100) wafers by using filtered cathodic vacuum arc technique (FCVA). The influence of the negative bias voltage applied to substrates on film structures was studied by Raman spectroscopy, X-ray photoemission spectroscopy (XPS). The ta-C films showed maximal sp3 fractions 87%, the hardness and elastic modulus of the ta-C film is 72 and 480 GPa, respectively. In vitro measurements of contact angle and platelet adhesion were applied to evaluate the biocompatibility of the ta-C films in comparison with that of NiTi, 316L and pure titanium. The results show that the ta-C films have hydrophobicity and exhibit better hemocompatibility which are very suitable for biomedical applications.

Characterization of Boron- and Phosphorous-Incorporated Tetrahedral Amorphous Carbon Films Deposited by the Filtered Cathodic Vacuum Arc Process

2009 ◽  
Vol 48 (6) ◽  
pp. 065501 ◽  
Author(s):  
Omvir Singh Panwar ◽  
Mohd. Alim Khan ◽  
Mahesh Kumar ◽  
Sonnada Math Shivaprasad ◽  
Bukinakere Subbakrihniah Satyanarayana ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Carbon Films ◽  
Vacuum Arc ◽  
Amorphous Carbon Films ◽  
Tetrahedral Amorphous Carbon ◽  
Filtered Cathodic Vacuum Arc
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