SEM, AFM, EDX and XRD analysis of laser ablated Ti in nonreactive and reactive ambient environments

Kalsoom, Umm-i; Bashir, Shazia; Ali, Nisar

doi:10.1016/j.surfcoat.2013.07.056

Cited by 33 publications

(17 citation statements)

References 26 publications

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“…As shown in Figure 5, the characteristic diffraction peak of GO is at 10.98 • , which corresponds to the (002) plane [32]. The diffraction peaks of 35.13 • , 40.25 • , and 42.82 • are the characteristic peaks of Ti, corresponding to the (100), (002), and (101) planes, respectively [33]. It can be clearly seen that the characteristic peaks of Ti are still observed in the pattern of GO-Ti composite material, which indicates that the Nano-Ti particles have been successfully anchored on the GO surface.…”

Section: Structure and Morphology Of Go-ti Compositesmentioning

confidence: 97%

Graphene Oxide Decorated with Titanium Nanoparticles to Reinforce the Anti-Corrosion Performance of Epoxy Coating

Yuan

Nie

et al. 2020

Coatings

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Graphene oxide–titanium (GO-Ti) composite materials were fabricated using GO as a precursor and then anchoring nano titanium (Nano-Ti) particles on GO sheets with the help of a silane coupling agent. Then, the coating samples were prepared by dispersing GO, Nano-Ti particles, and GO-Ti in an epoxy resin at a low weight fraction of 1 wt %. The GO-Ti composites were investigated by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The dispersibility and anti-corrosion mechanism of the coatings were studied by sedimentation experiments, electrochemical impedance spectroscopy (EIS), SEM, and salt spray tests. The mechanical properties of the coatings were analyzed by friction and wear tests. The results showed that the Nano-Ti particles were successfully loaded on the GO surface by chemical bonds, which made GO-Ti composites exhibit better dispersibility in the epoxy than GO. Compared with Nano-Ti particles and GO, the GO-Ti composite exhibited significant advantages in improving the corrosion resistance of epoxy coatings at the same contents, which was attributed to the excellent dispersibility, inherent corrosion resistance, and sheet structure. Among the different proportions of composite materials, the GO-Ti (2:1) material exhibited the best dispersibility and corrosion resistance. In addition, the composite material also greatly improved the wear resistance of the coating.

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Section: Structure and Morphology Of Go-ti Compositesmentioning

confidence: 97%

Graphene Oxide Decorated with Titanium Nanoparticles to Reinforce the Anti-Corrosion Performance of Epoxy Coating

Yuan

Nie

et al. 2020

Coatings

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“…[38][39][40][41][44][45][46][47][48][49][50][51][52][53][54][55][56][57] The band gap value suggests that the material is electrically conductive (i.e. The band gap of the material was calculated to be 3.3 eV and 3.5 eV from uorescence and UV-visible data, respectively.…”

Section: View Article Onlinementioning

confidence: 99%

A gallium telluride quantum dots bioelectrode system for human epidermal growth factor receptor-2 (Her2/neu) oncogene signalling

et al. 2015

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Human epidermal growth factor receptor 2 (Her2/neu) is a biomarker that is overexpressed in human breast cancers. A quantum dots (QDs) -based genosensor for Her2/neu oncogene was developed with gallium telluride QDs and amine-terminated probe ssDNA (NH 2 -5 0 -AATTCCAGTGGCCATCAA-3 0 ), that is complementary to the DNA sequence of a section of the ERF gene of HER-2/neu (i.e. 5 0 -GAACATGAAGGACCGGTGGGC-3 0 ). The QDs were highly crystalline, 6 nm (from XRD) in size and had band gap values of 3.3 eV and 3.5 eV calculated from fluorescence emission and UV-visible absorption data, respectively. The sensor sensitivity and limit of detection values were 10.0 mA ng À1 mL À1 and 0.2 pg mL À1 Her2/neu oncogene, respectively.

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“…The quantum yield of the 3MSA‐Ga 2 Te 3 quantum dot (0.90) , which was used as an imaging probe, was higher than that of rhodamine 6G (0.70) as expected. The quantum yields were calculated from equations reported in the literature . The results suggest that the nanodots have shown to be much more stable than fluorescent dyes as was observed in other results in addition to being much brighter.…”

Section: Resultsmentioning

confidence: 82%

Influence of Quantum Dot Surface on Electrochemical DNA Sensing Mechanism

2020

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Owing to their high surface‐to‐volume ratio, electrocatalytic activity, biocompatibility and novel electron transport properties, quantum dots (QDs) are highly attractive materials for the ultrasensitive detection of biological macromolecules via bioelectronic devices. In this study, a QD‐based genosensor was developed, in which Ga2Te3‐based QDs were synthesized using an aqueous solution approach by mixing 3‐mercaptosuccinic acid (3MSA)‐capped gallium metal precursor with reduced tellurium metal. The results enabled us to reach an original understanding related to the active material involved in the probe DNA sensing mechanism. The morphological and structural characterization of the QDs was performed prior to their utilization in a DNA sensor construction. High‐resolution TEM (HR‐TEM) and atomic force microscopy (AFM) images confirmed the spherical and crystalline nature of the QDs, whereas X‐ray photoelectron spectroscopy (XPS) and X‐ray diffraction (XRD) analyses were able to confirm the oxidation states and formation of the prepared QDs. UV/Vis was capable of finding the optical band gap energy and the photostability of the QDs. The resultant Ga2Te3 QDs together with metal ions confirmed their use for DNA signal detection through their DNA binding mechanism in the genosensor construction. Genosensing in Cs+ and Li+ ions exhibited high sensitivity (2.74–3.69 μA ng−1 mL) and very low detection limits (0.4 pg mL−1) with a linear dynamic range of 0.1–1 ng mL−1.

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SEM, AFM, EDX and XRD analysis of laser ablated Ti in nonreactive and reactive ambient environments

Cited by 33 publications

References 26 publications

Graphene Oxide Decorated with Titanium Nanoparticles to Reinforce the Anti-Corrosion Performance of Epoxy Coating

Graphene Oxide Decorated with Titanium Nanoparticles to Reinforce the Anti-Corrosion Performance of Epoxy Coating

A gallium telluride quantum dots bioelectrode system for human epidermal growth factor receptor-2 (Her2/neu) oncogene signalling

Influence of Quantum Dot Surface on Electrochemical DNA Sensing Mechanism

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