Morphology-controllable synthesis of highly ordered nanoporous diamond films

Wang, Qiang; Bai, Jie; Dai, Bing; Yang, Lei; Wang, Peng; Yang, Zhenhuai; Guo, Shuai; Han, Jiecai; Zhu, Jiaqi

doi:10.1016/j.carbon.2017.12.017

Cited by 19 publications

(6 citation statements)

References 29 publications

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“…24 The porosity of the diamond surface also can be used to tune the wettability of diamond materials. [25][26][27] The porosity of diamond crystals, lms, membranes and compacts can be achieved by a variety of methods. The most obvious top-down approach is based on post-growth treatment of solid micro-nanocrystalline diamond lms such as laser drilling, 25,28 reactive ion etching, [29][30][31] gas-mediated electron beam-induced etching, 32 and chemical etching of grain boundaries in nanocrystalline diamond lms.…”

Section: Introductionmentioning

confidence: 99%

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Microporous poly- and monocrystalline diamond films produced from chemical vapor deposited diamond–germanium composites

et al. 2023

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Section: Introductionmentioning

confidence: 99%

“…24 The porosity of the diamond surface also can be used to tune the wettability of diamond materials. 25–27…”

Section: Introductionmentioning

confidence: 99%

Microporous poly- and monocrystalline diamond films produced from chemical vapor deposited diamond–germanium composites

et al. 2023

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“…[ 8,37–40 ] It is possible to tailor the microstructure of the diamond coatings. [ 41–43 ] However, it is challenging to synthesize gradient films based on these materials with large wettability amplitude and controlled length. [ 8 ] Therefore, functional gradient films that can sustain mechanical and chemical robustness simultaneously pose a challenge.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Micro/Nanostructured Diamond Gradient Surface for Controlled Water Transport and Fog Collection

Wang

Handschuh‐Wang

Yang

et al. 2021

Adv Materials Inter

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The directed transport of liquids is essential for numerous applications, such as microfluidics, heat transfer, and water harvesting. However, the traditional chemical coatings used for topographical or chemical gradients lack chemical stability and long‐term durability in harsh environments, such as elevated humidity, high temperature, or high pressure. Here, multifunctional robust diamond gradient films with gradually changed multilevel structure and chemical composition are designed and synthesized via a controlled chemical vapor deposition process. The size and abundance of hierarchical micro/nanostructural diamond crystals gradually increase along the film's length by manipulating deposition temperature and gas‐phase concentration, which endows the gradient surface with the ability to direct water droplets from the highly hydrophobic diamond‐rich surface (contact angle 141°) toward the hydrophilic SiC surface (contact angle 13°). This unique property is used to promote water condensation in seawater desalination systems with high humidity; significantly, the fog‐collecting ability is three times higher than that of the hydrophobic film and eight times higher than that of hydrophilic film. More importantly, the water harvesting performance remains even after harsh treatments with corrosive liquids and abrasive sandblasting, indicating potential applicability in microfluidics, desalination, and fog collection.

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“…The WCA of single crystalline diamond is ≈93° [ 11,12 ] ; i.e., it is reasonably hydrophilic; however, this value depends greatly upon the surface termination and its morphology. [ 13,14 ] Different chemical species terminating a diamond surface may either attract or repel water molecules, influencing both the surface hydrophilicity and adhesion properties. For example, an oxidized diamond surface is very hydrophilic, whereas a hydrogenated surface is hydrophobic.…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al also prepared porous diamond films, which, after hydrogen etching, showed a WCA of 138.5°. [ 13 ] Dunseath et al fabricated diamond‐coated nanoneedles, which exhibited large differences in WCA from the flat diamond control samples. [ 15 ] These differences were ascribed to the increased surface area of the nanoneedles, amplifying the water/surface interactions.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobicity and Adhesion of Aggregated Diamond Particles

Yao

Dai

May

et al. 2020

Physica Status Solidi (a)

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Diamond powders with high hydrophobicity are prepared by etching graphite plates using a hydrogen/argon (H2/Ar) plasma. The morphology and size of the diamond powders are found to vary with the proportion of Ar in H2 from 0% to 50%. Wettability is measured using water contact angle (WCA) measurements giving values between 129.7° and 146.9°. The high hydrophobicity can be ascribed to the aggregated structure of the as‐grown diamond powders. To check this assumption, the aggregated diamond powders are separated into individual particles by mechanical grinding; then, the WCAs of separated as‐grown diamond powders and commercial dispersed diamond powders are compared. The separated diamond surfaces show the lower WCAs of 99.68° and 96.96°. The surface of the aggregated diamond powders also exhibits high adhesion to water. The diamond surface grown in 2% Ar suspends 40 μL of water under a tilt angle of 180°. Such aggregated diamond powders are promising for no‐loss liquid transportation.

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Morphology-controllable synthesis of highly ordered nanoporous diamond films

Cited by 19 publications

References 29 publications

Microporous poly- and monocrystalline diamond films produced from chemical vapor deposited diamond–germanium composites

Microporous poly- and monocrystalline diamond films produced from chemical vapor deposited diamond–germanium composites

Hierarchical Micro/Nanostructured Diamond Gradient Surface for Controlled Water Transport and Fog Collection

Hydrophobicity and Adhesion of Aggregated Diamond Particles

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