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Related Concept Videos

Microbial Biosensors01:17

Microbial Biosensors

Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...
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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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Related Experiment Video

Updated: May 12, 2026

Fabrication of a Multiplexed Artificial Cellular MicroEnvironment Array
07:19

Fabrication of a Multiplexed Artificial Cellular MicroEnvironment Array

Published on: September 7, 2018

Dynamic microbead arrays for biosensing applications.

Mael Manesse1, Aaron F Phillips, Christopher N LaFratta

  • 1Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts, USA.

Lab on a Chip
|April 26, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces an optical tweezers platform for dynamic microbead array assembly, enabling multiplexed biomolecule detection using quantum dots. The system successfully identified pathogenic E. coli genes, paving the way for advanced biosensing diagnostics.

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Last Updated: May 12, 2026

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Formation of Biomembrane Microarrays with a Squeegee-based Assembly Method
07:56

Formation of Biomembrane Microarrays with a Squeegee-based Assembly Method

Published on: May 8, 2014

Area of Science:

  • Biophysics
  • Nanotechnology
  • Molecular Diagnostics

Background:

  • Multiplexed detection of biomolecules is crucial for diagnostics.
  • Existing methods often lack real-time, on-demand capabilities.
  • Optical tweezers offer precise manipulation of microscale objects.

Purpose of the Study:

  • To develop an optical tweezers platform for dynamic microbead array creation.
  • To enable multiplexed detection of biomolecules using quantum dot encoded beads.
  • To demonstrate the platform's utility in identifying pathogenic bacterial genes.

Main Methods:

  • Utilized time-shared optical tweezers for dynamic assembly of sensing microspheres.
  • Employed quantum dot nanocrystals for signaling probes and bead encoding.
  • Integrated real-time fluorescence signal recording for detection.
  • Applied the platform to detect genes in Escherichia coli O157:H7.

Main Results:

  • Successfully assembled dynamic microbead arrays on-demand.
  • Achieved multiplexed detection using quantum dot encoded beads and varying bead sizes.
  • Demonstrated real-time fluorescence signal acquisition.
  • Accurately detected and identified three genes from pathogenic E. coli O157:H7 strains.

Conclusions:

  • The developed optical tweezers platform facilitates on-demand dynamic array creation for multiplexed biosensing.
  • Quantum dot encoding and real-time fluorescence detection enable sensitive and specific biomolecule identification.
  • This technology is adaptable for microfluidic devices and holds potential for on-demand diagnostic platforms.