Light-driven motion of liquids on a photoresponsive surface

@article{Ichimura2000LightdrivenMO,
  title={Light-driven motion of liquids on a photoresponsive surface},
  author={Ichimura and Oh and Nakagawa},
  journal={Science},
  year={2000},
  volume={288 5471},
  pages={
          1624-6
        }
}
The macroscopic motion of liquids on a flat solid surface was manipulated reversibly by photoirradiation of a photoisomerizable monolayer covering the surface. When a liquid droplet several millimeters in diameter was placed on a substrate surface modified with a calix[4]resorcinarene derivative having photochromic azobenzene units, asymmetrical photoirradiation caused a gradient in surface free energy due to the photoisomerization of surface azobenzenes, leading to the directional motion of… 
View on PubMed
diyhpl.us
1,179 Citations
Highly Influential Citations
5
Background Citations
102
Methods Citations
28
Results Citations
1

1,179 Citations

Photo-driven directional motion of droplets on the surface of a liquid crystal doped with photochromic azobenzene: theory

Recently, photo-driven directional motion of glycerol droplets on the surface of a liquid crystal doped with photochromic azobenzene derivatives has been reported. We present a theoretical model for…

Photocontrol of liquid motion on an azobenzene monolayer

This paper describes a novel strategy for the non-mechanical motion of a liquid droplet by photoisomerization of surface-immobilized azobenzenes. When a liquid droplet is placed on a substrate…

Light Controlled Capillarity of Liquid Crystals on Photo Anisotropic Surfaces

We report the observation and experimental study of an anisotropic photo controlled capillarity effect in liquid crystal cells. The photo sensitive substrates of the cell are composed of reactive…

Crawling and Bending Motions of Azobenzene Derivatives Based on Photoresponsive Solid–Liquid Phase Transition System

In this chapter, the concept of the photoinduced solid–liquid phase transition and its wide area of possible application are introduced. Also, two macroscopic motions induced by the synergetic action…

Light-induced deformation of photoresponsive liquid crystals on a water surface.

Photodeformation: Azobenzene derivatives showing a room-temperature liquid crystal (LC) phase exhibit photoinduced deformation on a water surface. While a droplet of a LC sample floating on the…

Light-induced assembly of tailored droplet arrays in nematic emulsions

Dynamic manipulation of droplets could be achieved by light in a nematic liquid crystal (LC) doped with photochromic azobenzene derivatives. On irradiation of ultraviolet light, the trans→cis…

Photoinduced deformation of liquid crystal polymers

Utilizing an optimized azobenzene precursor and polydimethylsiloxane-soft-template-based secondary replication, we achieved light-driven switching of superhydrophobic adhesion of water droplets on a…

Photocontrolled translational motion of a microscale solid object on azobenzene-doped liquid-crystalline films.

Iradiation with an Ar(+) laser resulted in precise control of the translational motion of microscale solid object on the surface, so that the particle always moved away from the irradiation position.

Reversible photodriven droplet motion on Ti3C2 MXene film for diverse liquids.

The concept of a smart, flexible photodriven droplet motion (PDM) device with programmable wettability is designed using the 2D material of MXene film, which has a profound influence on applications, such as microfluidic systems, microengines and liquid manipulation.

Observation of a photo wetting effect on anisotropic liquid-solid interfaces.

This paper reports on the experimental observation of an anisotropic photo controlled wetting effect and postulates that the underlying mechanism is related to the optical reorientation of molecules on the surface of the surrounding solid, which in turn, forces a corresponding re orientation of the liquid crystal molecules.
...

References

SHOWING 1-10 OF 28 REFERENCES

Controlling Microdroplet Formation by Light

A surface with photocontrollable wetting behavior is introduced. A monolayer of a polymeric material containing 4'-[trifluoromethoxy-4,4'-dibenzoazo dyes in the side chains has been transferred on…

Electrochemical principles for active control of liquids on submillimeter scales

Electrochemical methods were combined with redox-active surfactants to actively control the motions and positions of aqueous and organic liquids on millimeter and smaller scales to guide droplets of organic liquids through simple fluidic networks.

Inherent and Cooperative Photomechanical Motions in Monolayers of an Azobenzene Containing Polymer at the Air−Water Interface

Photoinduced expansion and contraction response in monolayers consisting of a poly(vinyl alcohol) derivative having an azobenzene (Az) side chain at the air−water interface was investigated in detail…

Photoinduced dilatational motion in monolayers of poly(methyl methacrylate) having benzospiropyran side groups

The photochemical properties of poly(methyl methacrylate) chains having benzospiropyran side groups have been used for the first time to generate longitudinal motion in Langmuir monolayers.…

Photoresponsive Monolayers Containing In-Chain Azobenzene

Azobenzene monolayers on silicon have been prepared by two synthetic methods:  (1) chemisorption of triethoxysilanes, and (2) acylation of amine-functionalized self-assembled monolayers with acid…

Using Light to Control Dynamic Surface Tensions of Aqueous Solutions of Water Soluble Surfactants

We report the use of UV light to control the dynamic surface tensions of mixed surfactant systems containing sodium dodecyl sulfate, SDS, and 4,4‘-bis(trimethylammoniumhexyloxy)azobenzene bromide,…

How to Make Water Run Uphill

A surface having a spatial gradient in its surface free energy was capable of causing drops of water placed on it to move uphill. This motion was the result of an imbalance in the forces due to…

Fingering instability of thin spreading films driven by temperature gradients

THE dynamics of spreading of thin liquid films are important to many technological and biological processes, including tertiary oil recovery, coating processes, the formation and protection of…

Photocontrolled aggregation of colloidal silica

Spirobenzopyran having a decamethylene spacer has been chemisorbed on the surface of colloidal silica particles of diameter 150 nm. The silica particles covered with the photochromic units displayed…

Modeling Organic Surfaces with Self‐Assembled Monolayers

The interfacial properties of organic materials are of critical importance in many applications, especially the control of wettability, adhesion, tribology, and corrosion. The relationships between…