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Related Concept Videos

Infrared Spectroscopy08:11

Infrared Spectroscopy

225.6K
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA
This experiment will demonstrate the use of infrared (IR) spectroscopy (also known as vibrational spectroscopy) to elucidate the identity of an unknown compound by identifying the functional group(s) present. IR spectra will be obtained on an IR spectrometer using the attenuated total reflection (ATR) sampling technique with a neat sample of the...
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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation09:39

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

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We describe a method for in-situ tapering of As2S3 fibers to achieve efficient mid-infrared supercontinuum generation. By tapering while monitoring the supercontinuum’s spectrum, the spectral width can be maximized for a fiber taper. In-situ fiber tapering can be applied to optimize the performance of other fiber-based...
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O-cresol Concentration Online Measurement Based On Near Infrared Spectroscopy Via Partial Least Square Regression06:50

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The protocol describes a method of predicting o-cresol concentration during the production of polyphenylene ether using near-infrared spectroscopy and partial least squares regression. To describe the process more clearly and completely, an example of predicting the o-cresol concentration during the production of polyphenylene is used to clarify the...
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Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
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Soft Lithographic Procedure for Producing Plastic Microfluidic Devices with View-ports Transparent to Visible and Infrared Light10:26

Soft Lithographic Procedure for Producing Plastic Microfluidic Devices with View-ports Transparent to Visible and Infrared Light

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A protocol for the fabrication of plastic microfluidic devices with transparent view-ports for visible and infrared light imaging is...
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Construction of Models for Nondestructive Prediction of Ingredient Contents in Blueberries by Near-infrared Spectroscopy Based on HPLC Measurements10:25

Construction of Models for Nondestructive Prediction of Ingredient Contents in Blueberries by Near-infrared Spectroscopy Based on HPLC Measurements

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We present here a protocol to construct and validate models for nondestructive prediction of total sugar, total organic acid, and total anthocyanin content in individual blueberries by near-infrared spectroscopy.
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Related Experiment Video

Updated: Jan 20, 2026

Infrared Spectroscopy: Characterization of Functional Groups
08:11

Infrared Spectroscopy: Characterization of Functional Groups

Published on: April 30, 2023

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Microfluidic mid-infrared spectroscopy via microresonator-based dual-comb source.

Mengjie Yu, Yoshitomo Okawachi, Austin G Griffith

    Optics Letters
    |August 30, 2019
    PubMed
    Summary

    This study demonstrates high-throughput, label-free dual-comb spectroscopy using microresonators on a microfluidic chip. This photonic integrated system rapidly analyzes liquid samples, enabling advanced chemical and biological analysis.

    More Related Videos

    In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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    O-cresol Concentration Online Measurement Based On Near Infrared Spectroscopy Via Partial Least Square Regression
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    Last Updated: Jan 20, 2026

    Infrared Spectroscopy: Characterization of Functional Groups
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    Infrared Spectroscopy: Characterization of Functional Groups

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

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

    Published on: May 27, 2013

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    O-cresol Concentration Online Measurement Based On Near Infrared Spectroscopy Via Partial Least Square Regression
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    O-cresol Concentration Online Measurement Based On Near Infrared Spectroscopy Via Partial Least Square Regression

    Published on: November 8, 2019

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    Area of Science:

    • Photonics
    • Spectroscopy
    • Microfluidics

    Background:

    • Microresonator-based soliton combs are advancing sensing, ranging, and imaging.
    • Large comb line spacing enables rapid, aliasing-free absorption spectra acquisition.

    Purpose of the Study:

    • To demonstrate high-throughput, label-free microresonator-based dual-comb spectroscopy in a microfluidic chip.
    • To dynamically probe the linear absorption of liquid acetone in the mid-infrared wavelength regime.

    Main Methods:

    • Utilized microresonator-based soliton combs integrated onto a microfluidic chip.
    • Employed dual-comb interferometry for spectral acquisition.
    • Measured absorption spectra of liquid acetone in the 2900-2990 nm range.

    Main Results:

    • Achieved a spectral acquisition rate of 25 kHz (40 μs per spectrum).
    • Successfully measured the flow dynamics of an acetone droplet.
    • Demonstrated proof-of-principle for label-free spectroscopy in a microfluidic system.

    Conclusions:

    • Combining microfluidics and silicon-photonics enables compact, time-resolved spectroscopy.
    • Potential applications include chemical synthesis, biological cell-sorting, and lab-on-a-chip systems.