Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...

Total Internal Reflection Fluorescence Microscopy

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

UV–Vis Spectroscopy: Molecular Electronic Transitions

UV–Vis Spectroscopy: Molecular Electronic Transitions

In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this process,...

Absorption of Radiation

Absorption of Radiation

The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:

Radiation: Applications

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...

UV–Vis Spectroscopy of Conjugated Systems

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π&VeryThinSpace;→&VeryThinSpace;π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Self-Referencing Photothermal Common-Path Interferometry to Measure Absorption of Si<sub>3</sub>N<sub>4</sub> Membranes for Laser-Light Sails.

ACS photonics·2025

Same author

A Continuously Worn Dual Temperature Sensor System for Accurate Monitoring of Core Body Temperature from the Ear Canal.

Sensors (Basel, Switzerland)·2023

Same author

Photography-based real-time long-wave infrared scattering estimation technique.

Journal of the Optical Society of America. A, Optics, image science, and vision·2021

Same author

Effects of Kolmogorov turbulence on optical cavity spectral response.

Applied optics·2021

Same author

Long-wave infrared absorption measurement of undoped germanium using photothermal common-path interferometry.

Applied optics·2020

Same author

High-Q diamond microresonators in the long-wave infrared.

Optics express·2020

Search research articles

Related Experiment Video

Updated: May 20, 2026

TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method

TiO₂-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method

Published on: April 26, 2017

Absorption to reflection transition in selective solar coatings.

Kyle D Olson¹, Joseph J Talghader

¹Department of Electrical and Computer Engineering, University of Minnesota, 200 Union St. SE, Minneapolis, Minnesota 55455, USA.

|July 26, 2012

Summary

Real-world selective solar absorbers require accounting for non-zero infrared emissivity. This study calculates the optimum transition wavelength for solar selective coatings with varying emissivity, revealing significant shifts from ideal models.

More Related Videos

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials

Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials

Published on: January 15, 2014

Related Experiment Videos

Last Updated: May 20, 2026

TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method

TiO₂-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method

Published on: April 26, 2017

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials

Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials

Published on: January 15, 2014

Area of Science:

Materials Science
Optical Engineering
Renewable Energy

Background:

Ideal selective solar absorbers assume zero infrared emissivity, which is unachievable in real coatings.
Non-zero infrared emissivity significantly alters the optimal design parameters for solar absorbers.

Purpose of the Study:

To investigate the impact of non-zero infrared emissivity on the optimum transition wavelength for selective solar absorbers.
To calculate equilibrium temperatures and optimal wavelengths for various infrared emissivity values and solar spectra.

Main Methods:

Theoretical calculations for AM0 and AM1.5 solar spectra with infrared emissivity ranging from 0% to 5%.
Experimental and theoretical characterization of a four-layer sputtered Mo and SiO₂ coating.

Main Results:

An infrared emissivity of 5% shifts the optimum transition wavelength and affects equilibrium temperature.
A 5% emissivity with 10x AM1.5 solar concentration yields an optimum wavelength of 1.28 µm and 957K equilibrium temperature.
Demonstrated a sputtered Mo and SiO₂ coating with 5% infrared absorption.

Conclusions:

Realistic modeling of selective solar absorbers must incorporate non-zero infrared emissivity.
The study provides crucial data for designing efficient solar selective coatings with improved performance.