Antibioadhesive Superhydrophobic Syringe Needles Inspired by Mussels and Lotus Leafs

Abstract

Fouling of surfaces due to bioadhesion is one of the hurdles in terms of their practical applications. Inspired by mussel and lotus leaf, antibioadhesive superhydrophobic syringe needles are fabricated by sequential bonding of polydopamine, Ag nanoparticles, and 1H,1H,2H,2H‐perfluorodecanethiol (PFDT). The morphology and surface chemical composition of the needles are characterized. The wetting properties and antibioadhesive properties of the needles are evaluated by contact angle (CA) and sliding angle (SA) of water and various aqueous solutions, and their residues on the needles after repeatedly used for liquid handling. The superhydrophobic needles show a rough surface with a layer of PFDT, which endow them with very high CA and low SA for water and various aqueous solutions. In addition, the aqueous solutions are in the Cassie–Baxter state on the surface of the superhydrophobic needles. Thus, the adhesion force between the superhydrophobic needles and aqueous solutions is very low. This endues the needles with excellent antibioadhesive properties and can be repeatedly used for withdrawing and dispensing various aqueous solutions. Moreover, the superhydrophobic needles can be used for the transport of aqueous solutions at high accuracy. The antibioadhesive superhydrophobic needles may find applications in various fields such as liquids transport and inkjet printing devices.

Synthesis of poly(ethylene glycol) (PEG) grafted silica nanoparticles with a minimum adhesion of proteins via one-pot one-step method

“…A c c e p t e d M a n u s c r i p t 6 TEM analyses were performed with a Philips CM120 transmission electron microscope operating at 120 keV. The samples were prepared by casting and drying a drop of particle dispersed in ethanol over a carbon coated copper grids.…”

“…In the past two decades, lotus leaf-inspired superhydrophobic surfaces characterized by high water repellency and self-cleaning property have been intensively studied to avoid the adhesion of fouling agents [6]. It should be mentioned that making the surface superhydrophobic decrease the interaction of surface and water molecules.…”

“…Therefore, regulating of surface wettability should be a promising strategy to develop novel antibioadhesive surfaces [6].…”

Superamphiphobic Bionic Proboscis for Contamination‐Free Manipulation of Nano and Core–Shell Droplets

“…These superamphiphobic bionic proboscises were capable of generating nanoliter droplets down to 10 nL, and demonstrated contamination‐free handling of oil and water droplets in air and in liquid environments. Their application as micromechanical bionic hands was showcased by the unprecedented demonstration of facile and rapid in‐air production of core‐shell water‐in‐oil droplets, demonstrating unique potential for numerous fields including microfluidics, drug delivery, chemical and bioengineering …”

“…Despite progress, development of compact low‐cost tools capable of contamination‐free nanoliter droplet manipulation remains elusive, and current approaches are based on bulky mechanical‐, thermal, electrical, and pyroelectrodynamics‐driven systems. These latter designs may experience contamination stemming from liquid residue adhering to the surfaces of tips or nozzles . Despite numerous advantages, these techniques have strict requirements such as high voltages, heat injection, and laser drilling, which increase complexity of manufacturing and limits end‐user compatibility and, in some instances, scalability.…”