Mechanical properties of high-crystalline diamond films grown via laser MPCVD

Yang, Meijun; Bai, Sunan; Xu, Qifeng; Li, Jun; Shimada, Toshihiro; Li, Qizhong; Goto, Takashi; Tu, Rong; Zhang, Song

doi:10.1016/j.diamond.2020.108094

Cited by 11 publications

(4 citation statements)

References 38 publications

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“…Optimized diamond growth is achieved at 20% CH 4 gas mixture as judged from the fingerprint diamond peak at 1332 cm −1 with a small FWHM (Full width at half maximum) value of ~25 cm −1 in the Raman spectrum. [ 8 ] Using this condition, we grew a ~30 nm thick NCD film that is characterized by highly crystalline columnar grains, and the presence of an 1 nm thick amorphous carbon layer at the diamond/silicon interface (Figure 2c,d and Figure S1d–f, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…The gamut of diamond metasurfaces achieved here surpasses that of metallic metasurface (45% of sRGB) [ 20 ] but is slightly lower than that of conventional Si metasurfaces (~75% of sRGB). [ 8 ] At this stage, there is still plenty of room to improve the color saturation by improving the refractive index and configuration of the diamond unit cell.…”

Section: Resultsmentioning

confidence: 99%

“…[5] A prominent example of structural colors is the plasmonic color resulting from the localized surface plasma resonance on metal nanomaterials, which can cover the entire visible spectrum and generate vivid images. [6][7][8] However, the high absorption and severe intrinsic losses from metallic components in resonant plasmonic system greatly limit the color saturation. Alternatively, dielectric materials like silicon and titanium oxide have demonstrated great potentials in achieving structural colors with high resolution and wide gamut.…”

Section: Introductionmentioning

confidence: 99%

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Structural Colors Based on Diamond Metasurface for Information Encryption

Liu

Meng

et al. 2023

Advanced Optical Materials

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Structural colors based on dielectric metasurfaces are attractive because of their potential application in next‐generation color printing. However, the commonly used dielectric materials suffer from issues of high light absorption (e.g., Si at blue wavelength) and low resistance to corrosion (e.g., titanium oxide), which greatly limit their application as structural color for information encryption. Here, dielectric‐metasurface‐based structural color constructed on nanocrystalline diamond (NCD) film by using bias enhanced nucleation (BEN) technique is demonstrated. Owing to the formation of highly crystalline diamond by the BEN process, the synthesized NCD film with a thickness of ~500 nm exhibits excellent optical quality with a relatively high refractive index that produces a strong magnetic dipole mode by Mie resonance. To realize the dynamic functionalities of diamond‐metasurface color with high resolution, a periodic array of asymmetric diamond cuboids with high aspect ratio (≈3.1) is fabricated, which produces polarization‐dependent response due to the enhanced Mie resonance. By optimizing the configuration of the diamond‐metasurface system, the color performance is improved with high brightness and a relatively wide gamut. This work demonstrates for the first time that NCD can serve as a robust and highly tunable dielectric platform for application in information encryption.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural Colors Based on Diamond Metasurface for Information Encryption

Liu

Meng

et al. 2023

Advanced Optical Materials

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“…3,4) Despite that, controlling the sp 3 /sp 2 ratio could pave new opportunities for advanced multifunctional Q-dia biomaterials. Several methods have been employed to increase the sp 3 -C bonded fraction [5][6][7][8] in the Q-dia films, among them, negative bias-enhanced nucleation-bias-enhanced growth (BEN-BEG) has emerged as a cutting-edge technique for its exceptional capability to strengthen the mechanical and structural properties of Q-dia films. In this method, reactive species from the plasma are attracted to the negatively-biased substrate holder, becoming sub-implanted beneath the substrate's surface where they synergistically interact to form an interfacial carbide layer.…”

mentioning

confidence: 99%

Synergistic effects of optimal negative bias-enhanced growth of quenched-produced diamond films on titanium substrates

Osman

Zkria

Ali

et al. 2023

Appl. Phys. Express

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We report on negative bias-enhanced growth of quenched-produced diamond films on titanium using hybrid coaxial arc plasma deposition at room temperature. Optimizing the bias voltage to -40 V resulted in a spontaneous formation of a titanium carbide interfacial layer, which caused a significant increase in the adhesion strength from 16 to 48 N. Selective etching of undesired sp2-C bonded atoms and ultrafast quenching of the energetic carbon ions C+ promoted the growth of dense sp3-C bonded atoms, achieving a superhardness of 96 GPa, comparable to natural diamond. These pioneering findings have the potential to revolutionize multifunctional materials for biomedical applications

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Mechanical behavior of surface-patterned and coated Si or Ge wafers for superhydrophobic and antireflective light transmitting windows

et al. 2022

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The compressive resistance of truncated nanocone lattices produced by lithography and etching steps on Si or Ge wafers to get superhydrophobic and antireflective light transmitting windows, as well as the protection efficiency of alumina or diamond coatings are investigated by numerical simulations of elastic buckling, and nano-compression tests. The latter reveal the limits of an elastic analysis, since the stress at the top of the cones is high enough to trigger plastic flow, or phase changes. Ge nano-cones exhibit a large ductility in compression, and even seem to creep at room temperature. Thin alumina or diamond coatings are however shown to provide an effective protection against both buckling and plastic flow.Surface patterning is shown to induce stress concentrations at the foot of the cones, which reduces the fracture resistance of the substrate in biaxial bending.

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Mechanical properties of high-crystalline diamond films grown via laser MPCVD

Cited by 11 publications

References 38 publications

Structural Colors Based on Diamond Metasurface for Information Encryption

Structural Colors Based on Diamond Metasurface for Information Encryption

Synergistic effects of optimal negative bias-enhanced growth of quenched-produced diamond films on titanium substrates

Mechanical behavior of surface-patterned and coated Si or Ge wafers for superhydrophobic and antireflective light transmitting windows

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