Hydrophobicity of electron beam modified surface of hydroxyapatite films
Source abstract
Abstract
Abstract Arrays of micron-sized domains of modified surface potential were created on hydroxyapatite films by mid-energy (20 keV) electron beam irradiation available in a laboratory scanning electron microscope. The dosage of electron beam was varied between 10−3 and 103 μC/cm2 to inject charge into the film surface. Contrary to the conventional electrowetting theory, the dosage of injected charge used in creating such microdomains caused a gradual increase of the water contact angle from 57° to 93° due to the elimination of the polar component of the surface free energy. Surface contamination by carbonaceous species can be held only partially responsible for such behavior at lower dosage of electron beam. A transfer of free surface charge to water and an electron beam induced disruption of polar orientation of OH ions have been attributed to be influencial factors in the overall dewetting behavior.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrowetting and Microfluidic Technologies · Surface Modification and Superhydrophobicity · Microfluidic and Bio-sensing Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (21)
Show source-provided references
1. Electrowetting: from basics to applications
2. Correlation between substratum roughness and wettability, cell adhesion, and cell migration10.1002/(SICI)1097-4636(199707)36:1<99::AID-JBM12>3.0.CO;2-E ↗
3. Evaluation of metallic and polymeric biomaterial surface energy and surface roughness characteristics for directed cell adhesion
4. Studies on cell-biomaterial interaction: role of tyrosine phosphorylation during fibroblast spreading on surfaces varying in wettability10.1016/0142-9612(96)84943-X ↗
5. Wettability patterning of hydroxyapatite nanobioceramics induced by surface potential modification10.1063/1.2196481 ↗
6. Surface electric fields increase osteoblast adhesion through improved wettability on hydroxyapatite electrets10.1021/am900341v ↗
7. Electrically polarized HAp-coated Ti: in vitro bone cell–material interactions10.1016/j.actbio.2009.02.023 ↗
8. Tunable hydroxyapatite wettability: effect on adhesion of biological molecules10.1016/j.procbio.2006.06.006 ↗
9. Direct creation of microdomains with positive and negative surface potential on hydroxyapatite coatings10.1063/1.3567532 ↗
10. Charge specific protein placement at submicrometer and nanometer scale by direct modification of surface potential by electron beam10.1021/la203491q ↗
11. Directly created electrostatic micro-domains on hydroxyapatite: probing with a Kelvin Force probe and a protein10.1007/s10856-011-4498-x ↗
12. Electron beam-induced sample contamination in the SEM10.1017/S1431927605507785 ↗
13. van Oss · 200610.1201/9781420015768 ↗
14. Pyroelectric, piezoelectric, and photoeffects in hydroxyapatite thin films on silicon10.1063/1.3571294 ↗
15. Ferroelectric polarization in nanocrystalline hydroxyapatite thin films on silicon10.1038/srep02215 ↗
16. Electron-induced surface modification of hydroxyapatite-coated implant10.1016/j.surfcoat.2007.08.060 ↗
17. Electron-induced wettability modification10.1103/PhysRevB.76.035437 ↗
18. Surface characterisation of electrograftedr poly[carbazole-co-3-methylthiophene] copolymers on carbon fiber: XPS, AFM and Raman spectroscopy10.1016/j.apsusc.2003.08.008 ↗
19. Structure and stability of hydroxyapatite: density functional calculation and rietveld analysis10.1103/PhysRevB.71.094103 ↗
20. Structural order and dielectric behaviour of hydroxyapatite10.1080/00150190590965523 ↗
21. Proton transport polarization and depolarization of hydroxyapatite ceramics10.1063/1.1357783 ↗