Abstract
The paper reports on the effect of Cu content in the Cr-Cu-O film and its structure on its antibacterial activity and mechanical properties. The Cr-Cu-O films were prepared by reactive magnetron sputtering from composed Cr/Cu targets using a dual magnetron. The antibacterial activity of Cr-Cu-O films was tested on the killing of Escheria coli bacteria. Correlations between the structure of the Cr-Cu-O film, the content of Cu in the film and its (i) antibacterial efficiency and (ii) mechanical properties were investigated in detail. It was found that the 100% efficiency of the killing of E. coli bacteria on the surface of the Cr-Cu-O film is achieved if (1) the Cu content in the film is ≥15 at.% and (2) the film is either X-ray amorphous or crystalline with the CuCrO 2 delafossite structure. These Cr-Cu-O films need no excitation and very effectively kill E. coli bacteria in the daylight as well as in the dark. The X-ray amorphous Cr-Cu-O films with ∼20 at.% Cu exhibit a higher (i) hardness H ≈ 4 GPa, (ii) effective Young's modulus E* ≈ 72 GPa and (iii) elastic recovery W e ≈ 37% compared with the crystalline Cr-Cu-O film with the CuCrO 2 delafossite structure exhibiting H ≈ 1.2 GPa, E* ≈ 21 GPa and W e ≈ 21%. Both films very effectively kill the E. coli bacteria, however, exhibit a low ratio H/E* < 0.1.
| Original language | English |
|---|---|
| Pages (from-to) | 660-666 |
| Number of pages | 7 |
| Journal | Applied Surface Science |
| Volume | 276 |
| DOIs | |
| Publication status | Published - 1 Jul 2013 |
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Keywords
- Antibacterial efficiency
- Cr-Cu-O film
- Mechanical properties
- Reactive magnetron sputtering
- Structure
ASJC Scopus subject areas
- Surfaces, Coatings and Films
Cite this
Antibacterial Cr-Cu-O films prepared by reactive magnetron sputtering. / Musil, J.; Blažek, J.; Fajfrlík, K.; Čerstvý, R.; Prokšová, Š.
In: Applied Surface Science, Vol. 276, 01.07.2013, p. 660-666.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Antibacterial Cr-Cu-O films prepared by reactive magnetron sputtering
AU - Musil, J.
AU - Blažek, J.
AU - Fajfrlík, K.
AU - Čerstvý, R.
AU - Prokšová, Š
PY - 2013/7/1
Y1 - 2013/7/1
N2 - The paper reports on the effect of Cu content in the Cr-Cu-O film and its structure on its antibacterial activity and mechanical properties. The Cr-Cu-O films were prepared by reactive magnetron sputtering from composed Cr/Cu targets using a dual magnetron. The antibacterial activity of Cr-Cu-O films was tested on the killing of Escheria coli bacteria. Correlations between the structure of the Cr-Cu-O film, the content of Cu in the film and its (i) antibacterial efficiency and (ii) mechanical properties were investigated in detail. It was found that the 100% efficiency of the killing of E. coli bacteria on the surface of the Cr-Cu-O film is achieved if (1) the Cu content in the film is ≥15 at.% and (2) the film is either X-ray amorphous or crystalline with the CuCrO 2 delafossite structure. These Cr-Cu-O films need no excitation and very effectively kill E. coli bacteria in the daylight as well as in the dark. The X-ray amorphous Cr-Cu-O films with ∼20 at.% Cu exhibit a higher (i) hardness H ≈ 4 GPa, (ii) effective Young's modulus E* ≈ 72 GPa and (iii) elastic recovery W e ≈ 37% compared with the crystalline Cr-Cu-O film with the CuCrO 2 delafossite structure exhibiting H ≈ 1.2 GPa, E* ≈ 21 GPa and W e ≈ 21%. Both films very effectively kill the E. coli bacteria, however, exhibit a low ratio H/E* < 0.1.
AB - The paper reports on the effect of Cu content in the Cr-Cu-O film and its structure on its antibacterial activity and mechanical properties. The Cr-Cu-O films were prepared by reactive magnetron sputtering from composed Cr/Cu targets using a dual magnetron. The antibacterial activity of Cr-Cu-O films was tested on the killing of Escheria coli bacteria. Correlations between the structure of the Cr-Cu-O film, the content of Cu in the film and its (i) antibacterial efficiency and (ii) mechanical properties were investigated in detail. It was found that the 100% efficiency of the killing of E. coli bacteria on the surface of the Cr-Cu-O film is achieved if (1) the Cu content in the film is ≥15 at.% and (2) the film is either X-ray amorphous or crystalline with the CuCrO 2 delafossite structure. These Cr-Cu-O films need no excitation and very effectively kill E. coli bacteria in the daylight as well as in the dark. The X-ray amorphous Cr-Cu-O films with ∼20 at.% Cu exhibit a higher (i) hardness H ≈ 4 GPa, (ii) effective Young's modulus E* ≈ 72 GPa and (iii) elastic recovery W e ≈ 37% compared with the crystalline Cr-Cu-O film with the CuCrO 2 delafossite structure exhibiting H ≈ 1.2 GPa, E* ≈ 21 GPa and W e ≈ 21%. Both films very effectively kill the E. coli bacteria, however, exhibit a low ratio H/E* < 0.1.
KW - Antibacterial efficiency
KW - Cr-Cu-O film
KW - Mechanical properties
KW - Reactive magnetron sputtering
KW - Structure
UR - http://www.scopus.com/inward/record.url?scp=84877581687&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84877581687&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2013.03.150
DO - 10.1016/j.apsusc.2013.03.150
M3 - Article
VL - 276
SP - 660
EP - 666
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -