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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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Updated: May 21, 2026

Fast Enzymatic Processing of Proteins for MS Detection with a Flow-through Microreactor
09:49

Fast Enzymatic Processing of Proteins for MS Detection with a Flow-through Microreactor

Published on: April 6, 2016

Micro-reactors for characterization of nanostructure-based sensors.

R Savu1, J V Silveira, A Flacker

  • 1Centro de Componentes Semicondutores - CCS, Universidade Estadual de Campinas - UNICAMP, C.P. 6061, Rua João Pandia Calógeras, 90, 13083-870, Campinas, SP, Brazil. raluca.savu@ccs.unicamp.br

The Review of Scientific Instruments
|June 7, 2012
PubMed
Summary
This summary is machine-generated.

This study presents a novel micro-reactor for characterizing nanosensors. The simple, leak-proof design enables rapid, reproducible measurements of gas sensors under vacuum conditions.

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Microfluidic Picoliter Bioreactor for Microbial Single-cell Analysis: Fabrication, System Setup, and Operation

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Sensor Technology

Background:

  • Characterizing nanosensors requires controlled environments.
  • Existing methods can be complex and prone to leaks.
  • There is a need for versatile, easy-to-use micro-reactors.

Purpose of the Study:

  • To fabricate and test a novel micro-reactor for nanosensor characterization.
  • To demonstrate the reactor's capability for in situ measurements.
  • To validate the reactor's performance using carbon nanotube-based sensors.

Main Methods:

  • Micro-reactors machined from kovar with integrated gas channels.
  • Hermetic sealing using borosilicate glass and o-rings.
  • Fabrication of carbon nanotube sensors on Si/SiO(2) substrates with gold electrodes.
  • Testing sensors under varying oxygen and nitrogen pressures (10⁻⁵ to 10⁻¹ mbar).

Main Results:

  • The micro-reactor demonstrated a small volume (100 μl) and leak-proof construction.
  • Simple assembly and compatibility with vacuum/gas systems were achieved.
  • Carbon nanotube sensors exhibited fast characteristic times, good sensitivity, and high reproducibility.
  • The reactor design allows for potential in situ optical characterization.

Conclusions:

  • The developed micro-reactor is a versatile and effective tool for nanosensor characterization.
  • Its design facilitates rapid and reproducible gas sensing measurements.
  • The micro-reactor's adaptability supports various in situ analysis techniques.