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Related Concept Videos

Microbial Biosensors01:17

Microbial Biosensors

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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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Towards Point-of-Care Single Biomolecule Detection Using Next Generation Portable Nanoplasmonic Biosensors: A Review.

Saeed Takaloo1,2, Alexander H Xu2,3, Liena Zaidan2,3

  • 1Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave. West, Waterloo, ON N2L 3G1, Canada.

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Portable nanoplasmonic biosensors offer sensitive, cost-effective early disease diagnosis. Miniaturization of components and diverse designs are advancing their development for widespread clinical use.

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SPRlab-on-a-chipmicro/nano-optics biosensornanoplasmonicplasmonic materialspoint-of-care test

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Analytical Chemistry

Background:

  • Nanoplasmonic biosensors are gaining interest for early disease diagnosis.
  • Their benefits include simple design, low detection limits, high sensitivity, cost-effectiveness, and miniaturization potential.
  • These features enable compact, portable designs integrating sampling, analysis, and measurement on a single chip.

Purpose of the Study:

  • This review summarizes research on portable nanoplasmonic biosensor designs.
  • It covers applications, theoretical modeling, and advancements in miniaturizing key components.
  • The review also discusses nanomaterial properties and challenges in biosensor commercialization.

Main Methods:

  • Miniaturization of essential components: light sources, plasmonic chips, and photodetectors.
  • Exploration of five portable design types: portable SPR, miniaturized components, flexible, wearable SERS-based, and microfluidic.
  • Discussion of nanomaterial properties and nanostructures for enhanced biosensor performance.

Main Results:

  • Progress has been made in developing various portable nanoplasmonic biosensor designs.
  • Microfluidic designs offer reduced diffusion times and efficient sample delivery.
  • Improvements in reproducibility are being addressed, a key factor for commercialization.

Conclusions:

  • Future trends focus on enhancing performance, optimizing biorecognition, and addressing practical constraints.
  • Emerging technologies and surface chemistry considerations are crucial for advancement.
  • The ultimate goal is the development of portable nanoplasmonic biosensors capable of single biomolecule detection.