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DNA Microarrays

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Updated: May 3, 2026

Visual Detection of Multiple Nucleic Acids in a Capillary Array

Visual Detection of Multiple Nucleic Acids in a Capillary Array

Published on: November 15, 2017

Easy daylight fabricated hydrogel array for colorimetric DNA analysis.

Antje Beyer¹, Sibyll Pollok, Albrecht Berg

¹Leibniz Institute of Photonic Technology e.V., Albert-Einstein-Strasse 9, 07745, Jena, Germany; Institute of Physical Chemistry and Abbe Centre of Photonics, Friedrich-Schiller-University Jena, Helmholtzweg 4, 07743, Jena, Germany.

Macromolecular Bioscience

|February 6, 2014

Summary

This summary is machine-generated.

Researchers developed 3D hydrogel microarrays for DNA analysis. These arrays offer simple, visual, on-site detection, minimizing UV damage to DNA during fabrication.

Keywords:

DNA immobilization chip-based DNA analysis daylight photo-polymerization hydrogel one-step polymerization

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Area of Science:

Biomaterials Science
Analytical Chemistry
Molecular Diagnostics

Background:

Developing sensitive and accessible methods for DNA analysis is crucial for on-site applications.
Existing methods often require complex instrumentation or can damage DNA during sample preparation.
There is a need for robust hydrogel platforms that facilitate straightforward DNA detection.

Purpose of the Study:

To fabricate 3D hydrogel microarrays for DNA analytics.
To enable simple visual signal readout for on-site DNA detection.
To develop a fabrication method that minimizes UV-induced DNA damage.

Main Methods:

Utilized N,N'-dimethylacrylamide/polyethylene glycol (PEG1900)-bisacrylamide monomers for one-step hydrogel polymerization.
Incorporated in situ capture oligonucleotide immobilization during polymerization.
Employed an acylphosphine-oxide photoinitiator for daylight polymerization, avoiding UV light exposure.
Monitored in-gel DNA hybridization via silver nanoparticle deposition.

Main Results:

Successfully fabricated 3D hydrogel microarrays with porous networks allowing DNA and protein penetration.
Achieved polymerization under visible light, reducing potential UV-induced DNA damage.
Demonstrated successful in-gel DNA hybridization visualized by silver nanoparticle deposition.
Enabled naked-eye signal readout for DNA detection.

Conclusions:

The developed 3D hydrogel microarrays provide a simple and effective platform for on-site DNA analytics.
Daylight-curable hydrogels with in situ immobilization offer advantages over UV-based methods.
Visual readout via silver nanoparticles enhances accessibility for field applications.