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Gas Chromatography: Types of Detectors-II01:19

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In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
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Gas Chromatography: Overview of Detectors01:13

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Detectors in gas chromatography (GC) help identify and quantify the components of a mixture by translating chemical properties into measurable signals, which are displayed on a chromatogram. Detectors can be categorized into two main types: destructive and non-destructive.
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
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Related Experiment Video

Updated: Nov 26, 2025

Aerosol-assisted Chemical Vapor Deposition of Metal Oxide Structures: Zinc Oxide Rods
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Fully Inkjet-Printed Mesoporous SnO2-Based Ultrasensitive Gas Sensors for Trace Amount NO2 Detection.

Nehru Devabharathi1, Arun M Umarji2, Subho Dasgupta1

  • 1Department of Materials Engineering, Indian Institute of Science (IISc), C V Raman Avenue, Bangalore, Karnataka 560012, India.

ACS Applied Materials & Interfaces
|December 9, 2020
PubMed
Summary

Researchers developed fully inkjet-printed tin oxide (SnO2) gas sensors with a large surface area for detecting nitrogen dioxide (NO2). These printed sensors demonstrate high sensitivity and low detection limits at low temperatures.

Keywords:
NO2 sensorco-continuous mesoporous structureevaporation-induced self-assemblyinkjet printingtin oxide

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Hybrid Printing for the Fabrication of Smart Sensors
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Area of Science:

  • Materials Science
  • Sensor Technology
  • Nanotechnology

Background:

  • Printed electronics offer versatile applications, but fully printed gas sensors remain rare.
  • Developing printed multisensor platforms is crucial for diagnostics, process control, and environmental safety.
  • Tin oxide (SnO2) is a key material for gas sensing applications.

Purpose of the Study:

  • To present completely inkjet-printed, co-continuous, mesoporous tin oxide (SnO2) thin films.
  • To investigate the nitrogen dioxide (NO2) sensing properties of these printed films at low temperatures.
  • To enable high-throughput manufacturing of inexpensive gas sensor units.

Main Methods:

  • Mimicked evaporation-induced self-assembly (EISA) using pluronic F127 as a soft templating agent and xylene as a micelle expander.
  • Fabricated highly reproducible, spatially homogeneous, co-continuous mesoporous crystalline SnO2 with pore diameters of 15-20 nm.
  • Utilized an industrial printing technique for sensor fabrication.

Main Results:

  • Achieved SnO2 gas sensors with high linearity for NO2 detection.
  • Observed an extremely high average response of 11,507 at 5 ppm NO2.
  • Demonstrated an ultralow detection limit of approximately 20 ppb with an easily amplified response of 31.

Conclusions:

  • The co-continuous, mesoporous structure ensures excellent electronic transport properties, high surface area, and high mobility, leading to outstanding sensor performance.
  • The industrial printing technique facilitates high-throughput manufacturing for cost-effective and wide-ranging applications.
  • These fully printed SnO2 gas sensors represent a significant advancement for printed multisensor platforms.