Structural characteristics of surface-functionalized nitrogen-doped diamond-like carbon films and effective adjustment to cell attachment

Liu, Aiping; Liu, Min; Qian, Guodong; Tang, W.H.

doi:10.1088/1674-1056/24/5/056804

Cited by 7 publications

(4 citation statements)

References 27 publications

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“…9 gives the largest measured counting rate of NV centers in pillars with each diameter value from 150 nm to 1 µm. The highest enhancement, about 10 folds, was obtained at 650 nm diameter, which differs from the simulation results in the previous report, [5] while the relation between the counting rate and the diameter is not that obvious. We attribute this result to the pillar shape, which has a conical top end fabricated with the RIE system, and the randomness of the NV center position in the of NV center clusters in 860 nm pillars at room temperature ranges between 500 ns and 700 ns (Fig.…”

Section: Single-photon Properties Of Nanostructured Diamondscontrasting

confidence: 99%

“…Diamond is an important material with many outstanding properties that serve as the basis for its applications in biology, high-pressure science, and other fields. [1][2][3][4][5][6][7] Benefiting from its abundant naturally existing or artificially induced color centers, the material now draws more and more interest from researchers globally for its heretofore unobserved physical and optical properties and promising applications in areas such as single-photon source, high-sensitivity sensors, and information processing. [8][9][10][11][12][13][14][15][16][17][18][19][20] Of particular interest is the electron spin of nitrogen vacancy (NV) centers in diamond, which can be initialized, coherently controlled, and read out at room temperature.…”

Section: Introductionmentioning

confidence: 99%

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Large scale fabrication of nitrogen vacancy-embedded diamond nanostructures for single-photon source applications

Jiang

Tang

et al. 2016

Chinese Phys. B

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Color centers in diamond are prominent candidates to generate and manipulate quantum states of light, even at room temperature. However, the efficiency of photon collection efficiency in bulk diamond is greatly reduced by the refraction at diamond/air interface. To address this issue, arrays of diamond nanostructures of different diameters and top end shapes have been fabricated with HSQ, PMMA and Cr as the etching masks, towards large scale fabrication of nitrogen vacancy (NV) embedded diamond single photon sources with enhanced collection efficiency. With mixture of O 2 and CHF 3 gas plasma, diamond pillars with diameter down to 45 nm have been achieved. The top end shape evolution has also been traced with a simple model. The tests of size dependent single photon properties confirmed a best single photon collection efficiency enhancement with a factor larger than ten folds and a mild decreasing of the decoherence time with the reduction of the pillar diameter was observed as expected. These results provide useful information in future applications of nanostructured diamond as single photon sources.

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Section: Single-photon Properties Of Nanostructured Diamondscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Large scale fabrication of nitrogen vacancy-embedded diamond nanostructures for single-photon source applications

Jiang

Tang

et al. 2016

Chinese Phys. B

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“…The C 1s spectra could be deconstructed into three peaks centered at 284.2 eV, 285.2 eV, and 288.5 eV, corresponding to the sp 2 hybrid carbon, sp 3 hybrid carbon, and C-O bond, respectively; the O signal is due to oxygen contamination in the air. [26] 960 The XRD analysis is employed to study the constitution of the as-deposited films seen in Fig. 4.…”

Section: Resultsmentioning

confidence: 99%

Controllable fabrication of self-organized nano-multilayers in copper–carbon films

Wang¹,

Li²,

Li³

et al. 2019

Chinese Phys. B

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In order to clarify the influence of methane concentration and deposition time on self-organized nano-multilayers, three serial copper-carbon films have been prepared at various methane concentrations with different deposition times using a facile magnetron sputtering deposition system. The ratios of methane concentration (CH 4 /Ar+CH 4 ) used in the experiments are 20%, 40%, and 60%, and the deposition times are 5 minutes, 20 minutes, and 40 minutes, respectively. Despite the difference in the growth conditions, self-organizing multilayered copper-carbon films are prepared at different deposition times by changing methane concentration. The film composition and microstructure are investigated by x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM). By comparing the composition and microstructure of three serial films, the optimal growth conditions and compositions for self-organizing nano-multilayers in copper-carbon film are acquired. The results demonstrate that the self-organized nano-multilayered structure prefers to form in two conditions during the deposition process. One is that the methane should be curbed at low concentration for long deposition time, and the other condition is that the methane should be controlled at high concentration for short deposition time. In particular, nano-multilayered structure is self-organized in the copper-carbon film with copper concentration of 10-25 at.%. Furthermore, an interesting microstructure transition phenomenon is observed in copper-carbon films, that is, the nanomultilayered structure is gradually replaced by a nano-composite structure with deposition time and finally covered by amorphous carbon.

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“…To solve these problems and improve the performance of stainless steel bipolar plates, it is necessary to modify the surface of the stainless steel or provide a coating protection. Several coating films, such as metal coatings [12,13,14], metal carbon/nitride coatings [15,16,17], conductive polymer coatings [18,19] and carbon coatings [20,21,22], have been proposed for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Study on the Properties of Vertical Carbon Nanotube Films Grown on Stainless Steel Bipolar Plates

Shi

Jin

et al. 2019

Materials

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Research on the conductivity and corrosion resistance of stainless steel bipolar plates in a proton exchange membrane fuel cell (PEMFC) is commonly performed in a normal-temperature environment (about 20 °C). However, these fuel cells must function in low-temperature environments (lower than 0 °C) in some conditions, such as in vehicle fuel cells and in portable power supplies that operate during the winter in northern China. Stainless steel bipolar plates have higher requirements in terms of their hydrophobic and anti-icing properties, in addition to needing high conductivity and corrosion resistance. In this study, carbon nanotubes (CNTs) are grown on the surface of 304 stainless steel (304 SS) without a catalyst coating by plasma-enhanced chemical vapor deposition (PECVD), which is a simple and cheap method that allows stainless steel to be used as bipolar plates in low-temperature environments. The Raman spectroscopy and scanning electron microscopy (SEM) results show that the CNTs grown on the surface of 304 SS have different morphologies. The stainless steel samples with different CNT morphologies are tested by hydrophobicity and in situ icing experiments to prove that vertical CNTs can achieve a superhydrophobic state and have good anti-icing properties. The interfacial contact resistance (ICR) of the bare 304 SS and the 304 SS with vertical CNTs is compared by voltammetry, and then the corrosion resistances of both types is compared in a simulated PEMFC environment via a three-electrode system. Consequently, the ICR of the 304 SS with vertical CNTs was lower than the bare 304 SS. The corrosion potential was positive, and the corrosion current density was greatly reduced for the stainless steel with vertical CNTs grown directly on its surface when compared with the bare 304 SS. The experimental results show that vertical CNTs have good application prospects as bipolar plates for PEMFCs in low-temperature environments.

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Structural characteristics of surface-functionalized nitrogen-doped diamond-like carbon films and effective adjustment to cell attachment

Cited by 7 publications

References 27 publications

Large scale fabrication of nitrogen vacancy-embedded diamond nanostructures for single-photon source applications

Large scale fabrication of nitrogen vacancy-embedded diamond nanostructures for single-photon source applications

Controllable fabrication of self-organized nano-multilayers in copper–carbon films

Study on the Properties of Vertical Carbon Nanotube Films Grown on Stainless Steel Bipolar Plates

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