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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
Thermosensation01:43

Thermosensation

Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
Assessing Body Temperature - Rectal01:27

Assessing Body Temperature - Rectal

Rectal temperature measurement is considered the most precise method for assessing core body temperature and typically registers higher than oral temperature. For adults, the rectal thermometer should be inserted 1 to 1.5 inches into the rectum to obtain the most accurate reading.
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...

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Updated: May 10, 2026

A Multimodal Wide-Field Fourier-Transform Raman Microscope
06:48

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

Single element Raman thermometry.

Christopher B Saltonstall1, Justin Serrano, Pamela M Norris

  • 1Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, USA.

The Review of Scientific Instruments
|July 5, 2013
PubMed
Summary
This summary is machine-generated.

A novel single element Raman thermometry (SERT) method reduces uncertainty and speeds up microscale temperature measurements. This technique enhances accuracy and data acquisition for applications like microelectromechanical systems (MEMS) devices.

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Area of Science:

  • Materials Science
  • Physics
  • Engineering

Background:

  • Traditional Raman thermometry offers high temperature sensitivity but suffers from significant uncertainty.
  • Existing methods require complex hardware and extensive measurement times.

Purpose of the Study:

  • To introduce a new Raman thermometry technique with reduced uncertainty and lower hardware requirements.
  • To improve the efficiency and accuracy of microscale temperature measurements.

Main Methods:

  • Utilized a modulated laser to excite Raman response and a single element detector with a lock-in amplifier.
  • Identified optimal spectral windows with the largest linear temperature dependence via numerical prediction and experimentation.
  • Applied the single element Raman thermometry (SERT) technique to map the thermal profile of a microelectromechanical systems (MEMS) device.

Main Results:

  • The SERT method demonstrated a reduction in temperature measurement uncertainty by over a factor of 2 compared to traditional approaches.
  • SERT enabled three times more data points to be collected in the same amount of time.
  • Noise reduction was achieved through the use of a lock-in amplifier, overcoming limitations of camera-based systems.

Conclusions:

  • The developed SERT technique provides a more accurate and efficient alternative for microscale thermometry.
  • SERT offers significant advantages for analyzing thermal profiles in microscale devices like MEMS.
  • This advancement paves the way for more precise thermal characterization in microscale engineering.