Related Experiment Video
Updated: Jun 27, 2026
14:16
Fluorescence detection methods for microfluidic droplet platforms
Published on: December 10, 2011
22.1K
Hyperspectral Imaging for High Throughput Optical Spectroscopy of pL Droplets
Marc Sulliger1, Jaime Ortega Arroyo1, Romain Quidant1
1Nanophotonic Systems Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland.
Analytical Chemistry
|January 29, 2025
Summary
This study introduces an advanced optofluidic platform for high-throughput droplet analysis. It enables label-free interrogation of single droplet contents with unprecedented resolution and automation, advancing biochemical and biomedical screening.
Area of Science:
- Biochemistry
- Biomedicine
- Microfluidics
Background:
- Droplet-based microfluidics offers high-throughput analysis but struggles with weak signals from small volumes.
- Extracting rich information from picoliter droplets at high throughputs remains a significant challenge.
Purpose of the Study:
- To develop an integrated optofluidic platform for high-throughput, label-free analysis of single droplet contents.
- To overcome limitations in signal detection and enable multiparametric analysis in droplet microfluidics.
Main Methods:
- Integrated optofluidic platform combining hyperspectral imaging, self-referencing, and automation.
- Achieved high temporal and spectral resolution with shot-noise limited performance.
- Demonstrated label-free interrogation of single droplet contents.
Main Results:
- Studied rapid dynamic changes in nanoparticle composition using high temporal and spectral resolution.
- Detected target DNA sequences down to 250 pM using a DNA-AuNP sensor, showcasing sensing compatibility.
- Demonstrated multiplexed sample monitoring over hours through automated measurements.
Conclusions:
- The optofluidic platform bridges the gap in high-throughput droplet analysis.
- Significantly enhances content-rich characterization capabilities for droplet microfluidics.
- Advances the scope and effectiveness of high-throughput screening methods in biomedicine and biochemistry.
Related Concept Videos
01:16Confocal Fluorescence Microscopy
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.