We present a simple method to produce carbon nanotube-based films with exceptional superhydrophobicity and impact icephobicity by depositing acetone-treated single-walled carbon nanotubes on glass substrates. This method is scalable and can be adopted for any substrate, both flexible and rigid. These films have indicated a high contact angle, in the vicinity of 170°, proved both by static and dynamic analysis processes. The dynamic evaporation studies indicated that a droplet deposited on the treated films evaporated in the constant contact angle mode for more than 80% of the total evaporation time, which is definitely a characteristic of superhydrophobic surfaces. Furthermore, the acetone-functionalized films showed a strong ability to mitigate ice accretion from supercooled water droplets (-8 °C), when the droplets were found to bounce off the films tilted at 30°. The untreated nanotube films did not indicate similar behavior, and the supercooled water droplets remained attached to the films' surfaces. Such studies could be the foundation of highly versatile technologies for both water and ice mitigation.

We developed a novel and facile method to hydrogenate graphene by using a conditioning catalyst upstream of the graphene sample to generate atomic hydrogen.

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Generally, the nonwetting surfaces of biological structures such as the lotus leaf, [1] the legs of a pond skater, [2] petals of a rose, [3,4] and the feet of a gecko [5] can be categorized as either superhydrophobic (contact angle ! 1508) with low adhesion to water or superhydrophobic with high adhesion to water. The lotus leaf and the legs of a pond skater are typical examples of superhydrophobic surfaces with low adhesion. Water droplets effortlessly roll off the surfaces, realizing self-cleaning when the surfaces are slightly tilted; conventionally, this phenomenon is called the lotus effect. Although many approaches have been successfully adopted to mimic the lotus-like surfaces for numerous applications, [6,7,8] the mechanism of this phenomenon is still not clearly understood. On the other hand, rose petals and gecko feet represent those fascinating surfaces that yield distinctively high adhesive superhydrophobicity. Water droplets continue to cling to such surfaces even when turned upside down. This is referred to as the petal effect. Thus far, very few methods have been reported to faithfully construct the petal-like surfaces with high adhesion and superhydrophobicity. Therefore, it is of great technological significance to develop a reliable way to produce such surfaces. This will not only facilitate understanding of the detailed mechanisms of both nonwetting phenomena, but also promise a variety of wide applications in drop-based technologies. [9,10] Its morphology, in addition to its chemical composition, essentially governs the wettability of a solid surface. The great variety of morphologies of zinc oxide (ZnO), hinging solely on preparation methods, [11] provides a fertile playground for fundamental research and extensive technological applications of wettability. [12.13] By adopting a facile hydrothermal method, we have for the first time finely tuned the micro-and nanostructures of a ZnO surface, resulting in a very high degree of hydrophobicity, as well as remarkably strong adhesion, which allows microdroplets to be accurately held in place with a very low contact area between the droplets (spherical shape) and the solid surface.The morphology of the ZnO coating sample is shown in Figure 1. Such a system can be regarded as a multi-scaled roughness structure composed of microsized folds, which range in size from 5 to 15 micrometer as displayed in Figure- (Figure 2) was performed to reveal that the sample has a single-phase ZnO Wür-zite (space group P63 mc) structure with lattice constants a = 3.25 , c = 5.21 (d = 2.81, 2.60, 2.48, 1.91, 1.62, 1.48, 1.38, 1.36 ). The estimated average size of the ZnO crystal grains based on Scherrer's equation is about 105 (the crystal grain size in the film t = 0.9l/B cos q, where l is the wavelength of the X-ray, and B is the full width at half maximum of the diffraction peak centered at diffraction angle q).

Single-walled carbon nanotubes (SWNTs) synthesized with different methods are investigated by using multiple characterization techniques, including Raman scattering, optical absorption, and X-ray absorption near edge structure, along with X-ray photoemission by following the total valence bands and C 1s core-level spectra. Four different SWNT materials (produced by arc discharge, HiPco, laser ablation, and CoMoCat methods) contain nanotubes with diameters ranging from 0.7 to 2.8 nm. The diameter distribution and the composition of metallic and semiconducting tubes of the SWNT materials are strongly affected by the synthesis method. Similar sp(2) hybridization of carbon in the oxygenated SWNT structure can be found, but different surface functionalities are introduced while the tubes are processed. All the SWNTs demonstrate stronger plasmon resonance excitations and lower electron binding energy than graphite and multiwalled carbon nanotubes. These SWNT materials also exhibit different valence-band X-ray photoemission features, which are considerably affected by the nanotube diameter distribution and metallic/semiconducting composition.