Surface modification of polymers by atomic oxygen using ECR plasma

Majeed, Riyadh M A Abdul; Datar, Archit; Bhoraskar, S. V.; Bhoraskar, V.N.

doi:10.1016/j.nimb.2007.01.230

Cited by 25 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main peak at 285.2 eV corresponds to the C−C (sp 3 ) bonds of diamond. , The C−H bonds could not be detected by XPS measurement, because XPS cannot detect H atoms. The positions of the peaks at 285.4, 286.3, and 288.6 eV correspond to C−N, C−O, and CO bonds, respectively, , on the functionalized diamond surface. However, the deconvolution of C−C (sp 3 ) and C−N is difficult because the difference in the binding energies for these bonds is quite small (0.2 eV).…”

Section: Resultsmentioning

confidence: 99%

Detection of Mismatched DNA on Partially Negatively Charged Diamond Surfaces by Optical and Potentiometric Methods

et al. 2008

View full text Add to dashboard Cite

The effects of surface charge density on DNA hybridization have been investigated on a mixture of hydrogen-, oxygen-, and amine-terminated diamond surfaces. A difference in the hybridization efficiencies of complementary and mismatched DNA was clearly observed by fluorescence and potentiometric observations at a particular coverage of oxygen. In the fluorescence observation, singly mismatched DNA was detected with high contrast after appropriate hybridization on the surface with 10-20% oxygen coverage. The amount of oxygen in the form of C-O(-) (deprotonated C-OH) producing the surface negative-charge density was estimated by X-ray photoelectron spectroscopy. Electrolyte solution gate field-effect transistors (SGFETs) were used for potentiometric observations. The signal difference (change in gate potential) on the SGFET, which was as large as approximately 20 mV, was caused by the difference in the hybridization efficiencies of complementary target DNA (cDNA) and singly mismatched (1MM) target DNA with a common probe DNA immobilized on the same SGFET. The reversible change in gate potential caused by the hybridization and denaturation cycles and discriminating between the complementary and 1MM DNA targets was very stable throughout the cyclical detections. Moreover, the ratio of signals caused by hybridization of the cDNA and 1MM DNA targets with the probe DNA immobilized on the SGFET was determined to be 3:1 when hybridization had occurred (after 15 min on SGFET), as determined by real-time measurements. From the viewpoint of hybridization kinetics, the rate constant for hybridization of singly mismatched DNA was a factor of approximately 3 smaller than that of cDNA on this functionalized (oxidized and aminated) diamond surface.

show abstract

Section: Resultsmentioning

confidence: 99%

Detection of Mismatched DNA on Partially Negatively Charged Diamond Surfaces by Optical and Potentiometric Methods

et al. 2008

View full text Add to dashboard Cite

show abstract

“…12 This is attributed to the radical bond formation as a result of the rearrangement of the recoil atoms. 11,13 The surface morphology of the PI film was visualized using the SPM in air at room temperature. Figure 8 shows the SPM image of the PI film surface.…”

Section: Resultsmentioning

confidence: 99%

“…Ion treatment was performed at room temperature in an implanter target chamber of 10 -5 Torr. The work of adhesion was calculated using the following relation: 13,16 where W A is the work of adhesion, γ lv is the interfacial surface tension between the liquid and the vapor and θ is contact angle (γ lv =72.8 mJ/m 2 for water). From a micropipette a few drops of water were put on the surface of the each PI samples.…”

Section: Resultsmentioning

confidence: 99%

Surface modification and characterization of N+ ion implantation on polyimide film

2010

View full text Add to dashboard Cite

The effects of N + ion implantation on surface structures and properties of polyimide films were investigated. The polyimide films were modified by 100 keV ions using a N + source at flow rates ranging from 5 × 10 14 to 5 × 10 17 ions/cm 2 with an ion current density of 10 µA/cm 2 . After the ion treatment, the chemical structures and morphology of the surfaces were examined in detail by X-ray photoelectron spectroscopy and scanning probe microscopy, respectively. The implantation of N + ions not only destroyed the chemical bonds as a result of random collisions by the incident ions and the energy transfer to the polymer atoms but also roughened the surface of the polyimide film. The roughness of the polyimide surface increased with increasing ion fluence, and the contact angle of the polyimide surface with water decreased.

show abstract

“…Even though this may be the case, Milde et al [139] reported that the adhesion property of PVD coatings could be enhanced through ECR plasma treatment. The enhancement of adhesion property of polyimide and fluorinated ethylene propylene (FEP), using electron cyclotron resonance (ECR) plasma treatments, was also highlighted by Abdul Majeed et al [140]. They also inferred that the surface chemistry and wettability characteristics of a material could be significantly altered through exposure to atomic oxygen ions.…”

Section: Plasma Surface Treatmentmentioning

confidence: 93%

Surface Treatments to Modulate Bioadhesion: A Critical Review

Waugh¹,

Toccaceli²,

Gillett³

et al. 2016

rev adhes adhesives

View full text Add to dashboard Cite

On account of the recent increase in importance of biological and microbiological adhesion in industries such as healthcare and food manufacturing many researchers are now turning to the study of materials, wettability and adhesion to develop the technology within these industries further. This is highly significant as the stem cell industry alone, for example, is currently worth £3.5 million in the United Kingdom (UK) alone. This paper reviews the current state-of-the-art techniques used for surface treatment with regards to modulating biological adhesion including laser surface treatment, plasma treatment, micro/nano printing and lithography, specifically highlighting areas of interest for further consideration by the scientific community. What is more, this review discusses the advantages and disadvantages of the current techniques enabling the assessment of the most attractive means for modulating biological adhesion, taking in to account cost effectiveness, complexity of equipment and capabilities for processing and analysis.

show abstract

Surface modification of polymers by atomic oxygen using ECR plasma

Cited by 25 publications

References 20 publications

Detection of Mismatched DNA on Partially Negatively Charged Diamond Surfaces by Optical and Potentiometric Methods

Detection of Mismatched DNA on Partially Negatively Charged Diamond Surfaces by Optical and Potentiometric Methods

Surface modification and characterization of N+ ion implantation on polyimide film

Surface Treatments to Modulate Bioadhesion: A Critical Review

Contact Info

Product

Resources

About