Photopatterning
Photopatterning - Related Videos
10:26
Photopatterning Proteins and Cells in Aqueous Environment Using TiO2 Photocatalysis
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Cited by 2 •
2015
We describe a protocol for modifying cell affinity of a scaffold surface in aqueous environment. The method takes advantage of titanium dioxide photocatalysis to decompose organic film in the photo-irradiated region. We show that it can be used to create microdomains of scaffolding proteins, both ex situ and in situ.
09:30
Generation of Multicue Cellular Microenvironments by UV-Photopatterning of Three-Dimensional Cell Culture Substrates
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Cited by 4 •
2022
Traditionally, cell culture is performed on planar substrates that poorly mimic the natural environment of cells in vivo. Here we describe a method to produce cell culture substrates with physiologically relevant curved geometries and micropatterned extracellular proteins, allowing systematic investigations into cellular sensing of these extracellular cues.
10:14
Fabrication and Operation of Acoustofluidic Devices Supporting Bulk Acoustic Standing Waves for Sheathless Focusing of Particles
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Cited by 16 •
2016
Acoustofluidic devices use ultrasonic waves within microfluidic channels to manipulate, concentrate and isolate suspended micro and nanoscopic entities. This protocol describes the fabrication and operation of such a device supporting bulk acoustic standing waves to focus particles in a central streamline without the aid of sheath fluids.
08:49
Engineering Three-dimensional Epithelial Tissues Embedded within Extracellular Matrix
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Cited by 6 •
2016
This manuscript describes a soft lithography-based technique to engineer uniform arrays of three-dimensional (3D) epithelial tissues of defined geometry surrounded by extracellular matrix. This method is amenable to a wide variety of cell types and experimental contexts and allows for high-throughput screening of identical replicates.
11:17
Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction
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Cited by 115 •
2016
A novel methodology is presented to synthesize and program main-chain liquid-crystalline elastomers using commercially available starting monomers. A wide range of thermomechanical properties was tailored by adjusting the amount of crosslinker, while the actuation performance was dependent on the amount of applied strain during programming.
FAQs
Spatially restricted illumination confines the response to selected regions. When a photoresponsive polymer, hydrogel, or surface coating is exposed through a mask or by focused light, only the illuminated locations undergo the intended transformation. Depending on the material, that transformation may be photopolymerization, degradation, or a change in chemical functionality, creating boundaries that can organize later biological interactions.
The outcome depends on the photoresponsive material and the light-triggered process it supports. Localized photopolymerization can build or stabilize selected regions, whereas degradation can remove or alter material in illuminated areas. A change in chemical functionality instead modifies how a surface or matrix behaves. These alternatives let the same general strategy generate different kinds of microscale organization.
Spatial precision links a defined material location to a biological response. Patterned regions can specify where cells adhere, while the arrangement of those regions can provide cues for cell position and movement. Because the material structure is deliberately organized at the microscale, researchers can examine how changes in local architecture relate to cellular behavior rather than treating the material as uniform.
A mask controls which parts of a photoresponsive material receive light, while focused illumination localizes exposure directly to selected regions. In either case, the illuminated geometry determines where polymerization, degradation, or chemical modification occurs. This spatial control allows researchers to create defined microscale architectures suited to particular biological arrangements.
Biological photopatterning can be applied to photoresponsive polymers, hydrogels, and surface coatings. The selected material determines whether exposure produces localized polymerization, degradation, or altered chemical functionality. Researchers can therefore choose a material format that supports the intended organization, such as a patterned surface for adhesion studies or a hydrogel architecture for biomaterial and tissue-engineering work.
Researchers begin with a photoresponsive polymer, hydrogel, or coating, then expose it through a mask or with focused illumination. The selected regions undergo a localized light-triggered change, producing the desired chemical, physical, or structural pattern. The patterned material can then be used to examine cell adhesion, positioning, movement, or organization within a biological architecture.
It is useful when an experiment requires controlled spatial organization of cells or biomaterials. Applications described for the technique include studies of cell behavior, tissue engineering, biomaterial design, and organoid development. In each case, patterned material structure provides a way to relate microscale arrangement to biological response, helping investigators examine how organization influences cellular or tissue-level systems.
Patterned materials can be used to assess where cells adhere, how they are positioned, and how they move across or within an organized environment. They also support the assembly of biomaterials into microscale architectures. These outcomes make the approach relevant for connecting controlled material structure with responses observed in cells, engineered tissues, and developing organoid systems.