Diamond-like carbon thin film with controlled zeta potential for medical material application

Nitta, Yumiko; Okamoto, Keishi; Nakatani, Tatsuyuki; Hoshi, Hideo; Homma, Akihiko; Tatsumi, Eisuke; Taenaka, Yoshiyuki

doi:10.1016/j.diamond.2008.05.004

Cited by 35 publications

(20 citation statements)

References 19 publications

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“…and pH iso = 3.7, which is identical to that obtained in this work using the tracer particle method. Nitta et al reported negative SZP for DLC thin films independently of the degree of oxidation. Finally, Voss et al .…”

Section: Resultsmentioning

confidence: 98%

“…─COOH, ─NH 2 ). These measurements have a long history in the characterization of carbon nanomaterials and carbon particles, particularly because of the numerous applications of carbon particles as absorbers and carriers . SZP measurements on particles or colloids rely on determinations of particle electrophoretic mobility in liquid suspensions, and several instrumentation platforms are currently available to carry out these determinations.…”

Section: Introductionmentioning

confidence: 99%

“…Kirby and Hasselbrink have previously reviewed this family of electrokinetic methods with particular emphasis on polymeric materials for microfluidics. However, to the best of our knowledge, there are only few reports of the use of these techniques on amorphous carbon coatings in the scientific literature …”

Section: Introductionmentioning

confidence: 99%

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Determination of surface ζ‐potential and isoelectric point of carbon surfaces using tracer particle suspensions

Vasconcelos

Zen

Stamatin

et al. 2017

Surface & Interface Analysis

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Carbon materials are widely used in a range of applications from biomaterials to sensing and electronics. Many of these applications rely on the ability to control carbon/water interfacial properties, in particular, surface charge density. This work reports a study of the electrokinetic properties of amorphous carbon thin films as a function of pH and surface chemistry. Surface ζpotential (SZP) and isoelectric point were determined using the tracer particle method. Initially, the use of sulfonated and amine-terminated latex bead suspensions as tracer particles for the determination of SZP of reference polymer surfaces was validated. The tracer particle method was then applied to the determination of SZP and isoelectric point of macroscopic carbon surfaces with different surface chemistry. Highly graphitic and sp 3 -rich hydrogenated carbon surfaces were found to display negative SZP, as expected for hydrophobic surfaces. The isoelectric point of the most highly graphitic surface was found to be pH iso = 3.7. Surface oxidation of these films resulted in a decrease of SZP at all pH values and in a downshift of pH iso to values lower than 1.5, consistently with the presence of surface acidic groups arising from oxidation. Results indicate that the specific choice of acid/base chemistry for the tracer particles does not significantly affect either SZP or pH iso determinations. These results show that the tracer particle method in combination with widely available latex beads as tracers can be applied for the determination of carbon SZP as a function of pH.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Determination of surface ζ‐potential and isoelectric point of carbon surfaces using tracer particle suspensions

Vasconcelos

Zen

Stamatin

et al. 2017

Surface & Interface Analysis

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“…The contact angle of a-C:H:N-Scaffold, a-C:H-Scaffold, and Scaffold without coating was 106.9°, 123.0°, and 121.4°, respectively. As C=O bonds are known to be hydrophilic [15], the cause is considered to be that the hydrophobic of the a-C:H film surface decreases with increasing in C=O bonds.…”

Section: In-vivo Testmentioning

confidence: 99%

Investigation of biocompatibility on nitrogen-doped a-C:H film coating scaffold surface in in-vivo and in-vitro tests

et al. 2013

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“…As C-O bonds are known to be hydrophilic, the cause is considered to be that the hydrophobic of the DLC film surface increases with decreasing in such bonds [13]. Moreover, the measurement of the contact angle, after the DLC film coating, the value of the contact angle changed to 124.0° from 114°.…”

Section: Dlc Film Dlc/scaffoldmentioning

confidence: 99%

Diamond-like Carbon Film Coating for Tissue Engineering

et al. 2008

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In this study, we focus on effect of diamond-like carbon (DLC) coating on scaffold for tissue engineering. DLC film was deposited on segmented polyurethane (SPU) scaffold sheet which consists of micro SUP fibers. Structural and compositional effects of the DLC film coating were investigated on cell growth as an investigation of biological response. The surface composition, morphology, structures, and wettability of the DLC film coating was estimated by using X-ray photoelectron spectrometer (XPS), Scanning Electron Microscope (SEM), Ar-laser Raman spectrophotometer (Raman), and contact angle measurement. And then, human umbilical vein endothelial (HUV-EC-C) cells were grown on the DLC coated scaffold sheet. The results presented here suggest that DLC film coating is promising approach to improve biological for tissue engineering.

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Diamond-like carbon thin film with controlled zeta potential for medical material application

Cited by 35 publications

References 19 publications

Determination of surface ζ‐potential and isoelectric point of carbon surfaces using tracer particle suspensions

Determination of surface ζ‐potential and isoelectric point of carbon surfaces using tracer particle suspensions

Investigation of biocompatibility on nitrogen-doped a-C:H film coating scaffold surface in in-vivo and in-vitro tests

Diamond-like Carbon Film Coating for Tissue Engineering

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