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Related Concept Videos

Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

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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.
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Updated: Sep 13, 2025

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Glancing Angle Deposition in Gas Sensing: Bridging Morphological Innovations and Sensor Performances.

Shivam Singh1, Kenneth Christopher Stiwinter2, Jitendra Pratap Singh1

  • 1Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.

Nanomaterials (Basel, Switzerland)
|July 25, 2025
PubMed
Summary

Glancing Angle Deposition (GLAD) fabricates advanced nanostructures for superior gas sensors. This technique precisely controls nanostructure geometry and porosity, enhancing sensitivity and selectivity for detecting various gases at low levels.

Keywords:
gas sensorsglancing angle deposition (GLAD)heterojunctionsnanostructured thin filmsnoble metal decorationsurface functionalization

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Gas sensors are crucial for environmental monitoring and industrial safety.
  • Existing gas sensors face challenges in sensitivity, selectivity, and response time.
  • Nanofabrication techniques offer potential for improved gas sensing performance.

Purpose of the Study:

  • To review recent advances in Glancing Angle Deposition (GLAD) for gas sensor fabrication.
  • To highlight how GLAD enables precise control over nanostructure properties for enhanced gas detection.
  • To synthesize strategies for material integration and structural engineering in GLAD-based sensors.

Main Methods:

  • Utilizing dynamic substrate tilting and rotation in GLAD to create anisotropic nanostructures (e.g., nanorods).
  • Implementing material strategies like heterojunctions, core-shell architectures, doping, and noble metal/metal oxide decoration.
  • Fabricating GLAD nanostructures for resistive, capacitive, piezoelectric, and optical gas sensing platforms.

Main Results:

  • GLAD enables fabrication of highly porous, anisotropic nanostructures with tunable surface area and diffusion pathways.
  • Engineered nanostructures demonstrate enhanced gas adsorption kinetics and signal transduction.
  • GLAD-based sensors achieve high sensitivity and selectivity for analytes like NO2, CO, H2S, and VOCs, with parts-per-billion detection limits.

Conclusions:

  • GLAD is a versatile platform for next-generation gas sensor development, offering precise structural control.
  • Material integration strategies significantly boost sensor performance by enhancing charge transfer and catalytic activity.
  • Future directions include photo-assisted sensing and AI integration for adaptive, multifunctional gas sensing systems.