Blue Light Led

Blue light LEDs are semiconductor devices that convert electrical energy into short-wavelength visible light, making controlled illumination available for biological experiments and photobiology research. When current passes through the LED’s p-n junction, electrons and holes recombine and release photons; the semiconductor material determines the wavelength and which light-sensitive molecules or proteins are activated. In biology, blue light LEDs support fluorescence microscopy, optogenetic control of engineered cells, studies of photoreceptors and circadian responses, and controlled illumination of photosynthetic organisms. Their low heat output, precise timing, and adjustable intensity improve experimental reproducibility while enabling investigation of light-dependent cellular processes.

Blue Light Led - Related Videos

Research

JoVE Journal - Bioengineering

Investigation of a Blue Light LED Device to Suppress Wound Pathogens Using a Collagen-Based Synthetic Skin Model

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2026

A 405 nm blue light LED device demonstrates antimicrobial efficacy against a broad range of wound pathogens when evaluated on a collagen-based synthetic skin model. This simplified in vitro approach offers a reproducible and ethically viable alternative for early-phase evaluation of light-based antimicrobial therapies.

Blue Light Therapy for Drug-Resistant Bacterial Infections in Burn Wounds in a Mouse Model

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2026

Source: Wang, Y., et al. In Vivo Investigation of Antimicrobial Blue Light Therapy for Multidrug-resistant Acinetobacter baumannii Burn Infections Using Bioluminescence Imaging. J. Vis. Exp. (2017)This video demonstrates the procedure for treating burn wound infections caused by bioluminescent, drug-resistant bacteria in mice using blue light therapy, followed by bioluminescence imaging to monitor treatment efficacy.

Estimating the Yield of Compounds on the TLC Plate via the Blue-LED Illumination Technique

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Cited by 1 •

2022

The present protocol developed a method to estimate the yield of compounds on the TLC plate using the blue-LED illumination technique. The advantages of this approach are that it is safe, effective, inexpensive, and allows the researcher to measure multiple samples simultaneously.

In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography (CT) and Light Microscopy (LM) Correlated with Scanning Electron Microscopy (SEM)

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Cited by 2 •

2016

A workflow for comprehensive micro-characterization of active optical devices is outlined. It contains structural as well as functional investigations by means of CT, LM and SEM. The method is demonstrated for a white LED which can be still be operated during characterization.

Using Affordable LED Arrays for Photo-Stimulation of Neurons

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Cited by 7 •

2011

Adult-born neurons expressing ChR2 can be manipulated in slice electrophysiological preparations in order to examine their contribution towards the function of olfactory neural circuits.

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