A micro-/nanoscale hierarchical rough structure inspired by the underwater superaerophobicity of fish scales was fabricated ablation a silicon surface femtosecond laser. The resultant showed superhydrophilicity in air and became superaerophobic after immersion water. Additionally, superaerophilicity lotus leaves, we that polydimethylsiloxane laser exhibits superhydrophobicity becomes superaerophilic excellent antibubble ability, whereas could absorb capture bubbles water medium. experimental...

Wettability is one of a solid surface’s fundamental physical and chemical properties, which involves wide range applications. Femtosecond laser microfabrication has many advantages compared to traditional processing. This technology been successfully applied control the wettability material surfaces. review systematically summarizes recent progress femtosecond in preparation various superwetting Inspired by nature, superwettabilities such as superhydrophilicity, superhydrophobicity,...

Abstract Technical limitations imposed by resolution and B1 homogeneity have thus far limited quantitative in vivo T2 mapping of cartilage to the patella. The purpose this study is develop femoral/tibial joint assess regional variability knee. Quantitative knee was performed on 15 asymptomatic adults (age, 22–44) using a 3T MR scanner. There consistent pattern spatial variation with longer values near articular surface. greatest occurs patella, where increases from 45.3 ± 2.5 msec at...

Abstract Radiofrequency (RF) field wave behavior and associated nonuniform image intensity at high magnetic strengths are examined experimentally numerically. The RF produced by a 10‐cm‐diameter surface coil 300 MHz is evaluated in 16‐cm‐diameter spherical phantom with variable salinity, the human head. Temporal progression of indicates that standing dielectric resonance occurring pure water near greatly dampened head due to strong decay electromagnetic wave. characteristic distribution...

Abstract Purpose To aid in discussion about the mechanism for central brightening high field magnetic resonance imaging (MRI), especially regarding appropriateness of using term dielectric to describe seen images human head. Materials and Methods We present both numerical calculations experimental at 3 T a 35‐cm‐diameter spherical phantom varying salinity with one surface coil two coils on opposite sides, further frequencies corresponding resonances sphere. Results With strategically placed...

OBJECTIVE—The objectives of this study were to compare intrinsic foot muscle cross-sectional area (CSA) in patients with diabetic polyneuropathy and nondiabetic control subjects examine the association between CSA clawing/hammering toes neuropathic feet. RESEARCH DESIGN AND METHODS—High-resolution T2-weighted fast spin-echo images parametric T2 multiple acquired using magnetic resonance imaging (MRI) frontal plane sections metatarsal region a sample eight individuals age- sex-matched...

A method to realize the superhydrophobicity, controllable adhesion, anisotropic sliding, and wetting by a femtosecond-laser-induced line-patterned PDMS surface.

A method to fabricate superoleophobic silicon surface with ultralow oil-adhesion using a femtosecond laser.

A simple and efficient technique for large-area manufacturing of concave microlens arrays (MLAs) on silica glasses with femtosecond (fs)-laser-enhanced chemical wet etching is demonstrated. By means fs laser in situ irradiations followed by the hydrofluoric acid process, large area close-packed rectangular hexagonal MLAs diameters less than a hundred micrometers are fabricated within few hours. The exhibit excellent surface quality uniformity. In contrast to classic thermal reflow presented...

Six different super-wettabilities were achieved on the same femtosecond laser ablated PDMS surface.

We present a rapid, facile, and simple method to realize superhydrophobic patterned polydimethylsiloxane (PDMS) surfaces with tunable adhesion by femtosecond laser. These are composed of laser-induced structures hydrophobic unstructured square array. The laser structured domain shows superhydrophobicity ultralow water adhesion, while the nonstructured flat PDMS ordinary hydrophobicity ultrahigh adhesion. By adjusting relative area fraction domains, as-prepared show that ranges from...

Abstract In this Communication, femtosecond laser is first used to successfully fabricate a slippery liquid infused porous surface (SLIPS). A kind of 3D network microstructure can be directly created on polyamide‐6 (PA6) substrate by one‐step direct writing method. The preparation process SLIPS mainly includes three steps: ablation, fluoroalkyl layer modification, and infusion lubricating liquid. the as‐prepared are inherent one material. Such has many advantages over most reported...

In this paper, we present a new approach to the tunable adhesive superhydrophobic surfaces consisting of periodic hydrophobic patterns and structures by femtosecond (fs) laser irradiation on silicon. The are composed (triangle, circle, rhombus) (dual-scale spikes induced fs laser). Our results reveal that forces as-prepared can be tuned varying area ratio (AR(s-h)) domain domain, thus resulting in static dynamic wettabilities. By increasing AR(s-h), (i) wetting property, which is...

Pre-wetted sand shows (quasi)underwater superoleophobicity and ultralow oil-adhesion in water medium based on its strong absorbing ability. A pre-wetted layer is successfully applied for oil–water separation extremely high efficiency capacity. This method separating oil simple, almost free of cost, green, very efficient. Oil–water the subject theoretical practical research around world because frequency with which spills occur increasing amounts oily industrial wastewater that are...

A fast and single-step process is developed for the fabrication of low-cost, high-quality, large-area concave microlens arrays (MLAs) by high-speed line-scanning femtosecond laser pulses. Each can be generated a single pulse, over 2.78 million microlenses were fabricated on 2 × cm2 polydimethylsiloxane (PDMS) sheet within 50 min, which greatly enhances processing efficiency compared to classical direct writing method. The mechanical pressure induced expansion laser-induced plasmas as well...

A one-step way to achieve smart reversible switching between the underwater superoleophobicity and superoleophilicity of femtosecond laser ablated Ti materials.

This paper introduces four typical aspects of femtosecond laser induced special wettability: superhydrophobicity, underwater superoleophobicity, anisotropic wettability, and smart wettability.

This review summarizes the recent developments of oil/water separation by natural superwetting materials, including superwettability, separating method, and mechanism.

This paper presents a one-step method to fabricate superhydrophobic surfaces with extremely controllable adhesion based on PDMS microwell arrays. The array structures are rapidly produced films by point-by-point femtosecond laser scanning process. as-prepared show water that ranges from ultrahigh ultralow adjusting the extent of overlap adjacent microwells, which sliding angle can be controlled 180° (a droplet not slide down even when surface is turned upside down) 3°. A "micro-airbag...

The natural compound eye is a striking imaging device with wealth of fascinating optical features such as wide field view (FOV), low aberration, and high sensitivity. Dragonflies in particular possess large, sophisticated eyes that exhibit resolving power information‐processing capacity. Here, large‐scale artificial inspired by the unique designs counterparts presented. created high‐efficiency strategy combines single‐pulse femtosecond laser wet etching thermal embossing. These have...