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Related Concept Videos

Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

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...
Glassware Calibration01:11

Glassware Calibration

Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
Gas Chromatography: Types of Detectors-I01:21

Gas Chromatography: Types of Detectors-I

There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte properties and...
Gas Chromatography: Overview of Detectors01:13

Gas Chromatography: Overview of Detectors

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: Jun 16, 2026

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
08:38

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

Published on: August 19, 2016

Chalcogenide glass bolometers.

S G Bishop, W J Moore

    Applied Optics
    |February 4, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Thallium selenide arsenide telluride (Tl(2)SeAs(2)Te(3)) shows promise as a room-temperature thermistor bolometer material. Optimized thin films on mica substrates achieved excellent noise-equivalent power, though response time is a limitation.

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    10:42

    Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

    Published on: December 29, 2016

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    Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
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    Published on: August 19, 2016

    In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
    09:39

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    Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
    10:42

    Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

    Published on: December 29, 2016

    Area of Science:

    • Materials Science
    • Condensed Matter Physics
    • Optoelectronics

    Background:

    • Thermistor bolometers are crucial for infrared detection.
    • Chalcogenide glasses offer tunable properties for thermal sensing applications.
    • Room-temperature operation is desirable for simplified detector systems.

    Purpose of the Study:

    • To evaluate Tl(2)SeAs(2)Te(3) as a novel thermistor bolometer material.
    • To fabricate and characterize thin-film bolometers for room-temperature applications.
    • To determine the performance limitations of Tl(2)SeAs(2)Te(3) bolometers.

    Main Methods:

    • Thin films of Tl(2)SeAs(2)Te(3) were prepared using hot-pressing and radio frequency (RF) sputtering.
    • Bolometers were fabricated on mica, glass, and sapphire substrates.
    • Device performance was assessed using a 500 K blackbody source and a 10 Hz chopping frequency.

    Main Results:

    • Optimal performance was achieved with 10-micrometer thick Tl(2)SeAs(2)Te(3) films on mica substrates.
    • A noise-equivalent power (NEP) of 2.3 x 10(-9) W Hz(-1/2) cm(-2) was recorded for a 2.5 x 10(-3) cm(2) device.
    • Another device achieved an NEP of 7.7 x 10(-10) W Hz(-1/2).

    Conclusions:

    • Tl(2)SeAs(2)Te(3) is a viable material for room-temperature thermistor bolometers.
    • Substrate choice and film thickness significantly impact device performance.
    • The primary limitation for AC performance is the material's inherent long response time (approximately 1 second).