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Related Experiment Video

Updated: Jun 9, 2026

Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates

Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates

Published on: March 20, 2015

Biomaterial-based random lasers achieved from peanut kernel doped with birch leaf-derived carbon dots.

Zhihao Huang¹, Henry Opoku², Jiong Liu¹

¹Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.

Nanophotonics (Berlin, Germany)

|November 7, 2025

Summary

Researchers developed an eco-friendly random laser using birch leaf-derived carbon dots (CDs) within a peanut structure. This biomaterial approach offers a sustainable and cost-effective alternative for photonic applications.

Keywords:

biomaterial-based random lasers carbon dots fluorescence lasing

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Area of Science:

Biomaterials Science
Photonics
Nanotechnology

Background:

Natural biomaterials possess disordered structures suitable for resonant cavities.
Developing eco-friendly and biocompatible microlasers is a significant challenge.
Synthetic laser materials often raise toxicity concerns.

Purpose of the Study:

To demonstrate a biomaterial-based random laser using carbon dots (CDs) as the gain medium.
To investigate the potential of natural disordered microstructures for random lasing.
To explore eco-friendly and cost-effective alternatives to synthetic laser materials.

Main Methods:

Fabrication of CDs-doped peanut samples via microinjection of birch leaf-derived CDs.
Characterization of fluorescence properties of CDs within the peanut matrix.
Observation and analysis of random lasing phenomena under pulsed laser excitation.

Main Results:

Successful fabrication of CDs-doped peanut samples retaining CD fluorescence.
Observation of random lasing on multiple peanut surfaces with varying thresholds.
Identification of light scattering within the disordered peanut structure as the lasing mechanism.

Conclusions:

Natural biomaterial microstructures can facilitate random lasing.
Biomaterial-based random lasers offer a biocompatible and sustainable alternative.
This approach paves the way for eco-friendly and cost-effective photonic devices.