Related Experiment Video
Updated: Dec 19, 2025
06:00
Author Spotlight: Development of a Smartphone-Enhanced Paper-Based Device for Rapid Dengue NS1 Detection
Published on: January 26, 2024
1.8K
Smartphone and Paper-Based Fluorescence Reader: A Do It Yourself Approach.
Laura Alejandra Ireta-Muñoz1, Eden Morales-Narváez1
1Biophotonic Nanosensors Laboratory, Centro de Investigaciones en Óptica A. C., León 37150, Mexico.
Biosensors
|June 6, 2020
Summary
This study presents a low-cost, DIY fluorescence reader using paper and a smartphone for quantifying quantum dot nanocrystals. The developed device offers a cost-effective solution for point-of-care biosensing applications.
Area of Science:
- Biomedical Engineering
- Materials Science
- Analytical Chemistry
Background:
- Portable quantum dot readers are typically expensive and complex.
- There is a need for affordable and accessible biosensing technologies.
Purpose of the Study:
- To develop a low-cost, "do it yourself" fluorescence reader for quantum dot (QD) quantification.
- To enable quantitative interrogation of QD nanocrystal concentrations for point-of-care biosensing.
Main Methods:
- Engineered a foldable case using black paperboard.
- Utilized cellophane paper as an optical bandpass filter.
- Employed a mid-range smartphone camera for detection.
Main Results:
- The DIY reader quantitatively interrogated QD nanocrystal concentrations from 2.5 to 20 nM.
- The device demonstrated a linear analytical range comparable to standard readers.
- The reader showed advantages in terms of cost-effectiveness.
Conclusions:
- A cost-effective and accessible fluorescence reader was successfully developed using paper materials and a smartphone.
- This DIY approach is suitable for quantitative analysis of quantum dots in point-of-care biosensing.
- The technology offers a viable alternative to expensive commercial quantum dot readers.
