Study of Human Serum Albumin Adsorption and Conformational Change on DLC and Silicon Doped DLC Using XPS and FTIR Spectroscopy

Ahmed, Mukhtar H.; Byrne, John; McLaughlin, James; Ahmed, Waqar

doi:10.4236/jbnb.2013.42024

Cited by 72 publications

(26 citation statements)

References 34 publications

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“…[18] Detailed XPS analysis of the SWNT/Anderson hybrid wasp erformed to further substantiate the formation of an amide bond between SWNTsa nd Anderson andc haracteristic shifts of the binding energies that were associated with the formation of O=CÀNH and C=NH bonds were detected. [19] Thermogravimetric analyses (TGA) of SWNTsa nd SWNT/Anderson composite (see the SupportingI nformation, Figure S1) show that, for pristine SWNTs, decomposition starts at approximately 525 8C. [19] Thermogravimetric analyses (TGA) of SWNTsa nd SWNT/Anderson composite (see the SupportingI nformation, Figure S1) show that, for pristine SWNTs, decomposition starts at approximately 525 8C.…”

Section: Resultsmentioning

confidence: 99%

Covalent Attachment of Anderson‐Type Polyoxometalates to Single‐Walled Carbon Nanotubes Gives Enhanced Performance Electrodes for Lithium Ion Batteries

Huang

et al. 2015

Chemistry A European J

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Single-walled carbon nanotubes (SWNTs) covalently functionalized with redox-active organo-modified polyoxometalate (POM) clusters have been synthesized and employed as electrode materials in lithium ion batteries. The Anderson cluster [MnMo6 O24 ](9-) is functionalized with Tris (NH2 C(CH2 OH)3 ) moieties, giving the new organic-inorganic hybrid [N(nC4 H9 )4 ]3 [MnMo6 O18 {(OCH2 )3 CNH2 }2 ]. The compound is then covalently attached to carboxylic acid-functionalized SWNTs by amide bond formation and the stability of this nanocomposite is confirmed by various spectroscopic methods. Electrochemical analyses show that the nanocomposite displays improved performance as an anode material in lithium ion batteries compared with the individual components, that is, SWNTs and/or Anderson clusters. High discharge capacities of up to 932 mAh g(-1) at a current density of 0.5 mA cm(-2) can be observed, together with high long-term cycling stability and decreased electrochemical impedance. Chemisorption of the POM cluster on the SWNTs is shown to give better electrode performance than the purely physisorbed analogues.

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Section: Resultsmentioning

confidence: 99%

Covalent Attachment of Anderson‐Type Polyoxometalates to Single‐Walled Carbon Nanotubes Gives Enhanced Performance Electrodes for Lithium Ion Batteries

Huang

et al. 2015

Chemistry A European J

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“…The experimental equipment had been described in detail previously [17]. The cleaned substrates were placed in the deposition chamber on top of a water-cooled electrode driven by an RF power supply.…”

Section: Film Preparation and Modificationmentioning

confidence: 99%

Characteristic of silicon doped diamond like carbon thin films on surface properties and human serum albumin adsorption

Ahmed

Byrne

Ahmed

2015

Diamond and Related Materials

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Diamond-like carbon (DLC) coatings are useful for creating biocompatible surfaces for medical implants. DLC and silicon doped DLC have been synthesised using plasma enhanced chemical vapour deposition (PECVD). The effects of surface morphology on the interaction of human serum albumin (HSA) with doped and undoped DLC films have been investigated using a range of surface analysis techniques using Raman spectroscopy and atomic force microscopy (AFM). Raman spectra of doped DLC show that silicon doped DLC reduces the growth range of the ID/IG ratio, with a significant red-shift of the G peak position. Following exposure to protein, for undoped DLC the peaks at 1664 cm- 1 and around 1241 cm- 1 can be attributed to amide I and III, respectively, with an increase in the surface morphology of the surfaces giving some indication of the protein structure on the surfaces. Results indicate that HSA exhibit the majority of Î²-sheet during the adsorption on the surfaces. The results showed that the silicon incorporation DLC tends to increase of surface roughness and the adsorbed level of HSA is higher with higher levels of silicon doping of the DLC. Therefore, doping DLC may provide a method of controlling the adsorption of protein. Â© 2015 Elsevier B.V. All rights reserved

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“…48 spectively. [43,44,52] The high-resolution N1sX P spectrumc an be fitted to two peaks at 399.58 and 401.58 eV ( Figure 3D), whicha re ascribed to CÀNa nd NÀC=O/NÀ H. [48,53,54] Because no oxygen-containing groups are detected in G@NC ( Figure 3A), these resultsi ndicate that pristineg raphene can significantly promotet he carbonization of GIL and that the self-assembly process occurs in situ on the graphene rather than throught he assembly of preformedN -doped carbon in solution.T he in situ self-assembly process was further proved by the unsuccessful assembly of the hydrothermally treated precursors on graphene (see Figure S3 in the Supporting Information for FESEM images). [45,46] Therefore, CÀ O/CÀNw as either removed or converted to C=C/CÀC/C=N during the in situ self-assembly process.…”

Section: Resultsmentioning

confidence: 97%

Pristine‐Graphene‐Supported Nitrogen‐Doped Carbon Self‐Assembled from Glucaminium‐Based Ionic Liquids as Metal‐Free Catalyst for Oxygen Evolution

Zhao

Jia

et al. 2019

ChemSusChem

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For the first time, graphene‐supported N‐doped carbon (G@NC) with a high degree of N doping was synthesized by in situ self‐assembly of a glucaminium‐based ionic liquid on pristine graphene under hydrothermal conditions. This 2D, metal‐free nanohybrid exhibited much higher catalytic activity than most reported metal‐free catalysts for the oxygen evolution reaction (OER) and even state‐of‐the‐art Ir‐ and Ru‐based catalysts because the high content of graphitic N greatly increased the number of OER‐active sites, the pristine graphene significantly promoted the OER activity of the C sites adjacent to the graphitic N atoms, and N‐doped graphitic carbon remarkably enhanced the charge‐transfer rate. This work not only creates a facile and economical approach to controllably fabricate pristine‐graphene‐supported carbon with a high N‐doping level for the development of highly efficient metal‐free OER catalysts but also provides insight into the mechanisms for both the in situ self‐assembly and the high OER catalytic activity of G@NC.

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Study of Human Serum Albumin Adsorption and Conformational Change on DLC and Silicon Doped DLC Using XPS and FTIR Spectroscopy

Cited by 72 publications

References 34 publications

Covalent Attachment of Anderson‐Type Polyoxometalates to Single‐Walled Carbon Nanotubes Gives Enhanced Performance Electrodes for Lithium Ion Batteries

Covalent Attachment of Anderson‐Type Polyoxometalates to Single‐Walled Carbon Nanotubes Gives Enhanced Performance Electrodes for Lithium Ion Batteries

Characteristic of silicon doped diamond like carbon thin films on surface properties and human serum albumin adsorption

Pristine‐Graphene‐Supported Nitrogen‐Doped Carbon Self‐Assembled from Glucaminium‐Based Ionic Liquids as Metal‐Free Catalyst for Oxygen Evolution

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