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Related Experiment Video

Updated: May 16, 2026

A Paired Bead and Magnet Array for Molding Microwells with Variable Concave Geometries

A Paired Bead and Magnet Array for Molding Microwells with Variable Concave Geometries

Published on: January 28, 2018

Laser-based directed release of array elements for efficient collection into targeted microwells.

Nicholas C Dobes¹, Rahul Dhopeshwarkar, W Hampton Henley

¹Department of Chemistry, University of North Carolina, Chapel Hill, NC 27599, USA.

|December 11, 2012

Summary

This summary is machine-generated.

This study introduces a novel laser-based cell separation method using micro-pallets for precise single-cell isolation and collection into microwells, achieving high accuracy and efficiency for cell sorting applications.

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Last Updated: May 16, 2026

A Paired Bead and Magnet Array for Molding Microwells with Variable Concave Geometries

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Published on: January 28, 2018

Assembly and Tracking of Microbial Community Development within a Microwell Array Platform

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Live-cell Imaging of Single-Cell Arrays (LISCA) - a Versatile Technique to Quantify Cellular Kinetics

Live-cell Imaging of Single-Cell Arrays (LISCA) - a Versatile Technique to Quantify Cellular Kinetics

Published on: March 18, 2021

Area of Science:

Biotechnology
Microfluidics
Cell Biology

Background:

Accurate single-cell isolation is crucial for various biological applications, including diagnostics and research.
Existing cell separation techniques often face limitations in precision, throughput, or cell viability.

Purpose of the Study:

To demonstrate a novel cell separation strategy for systematic isolation and collection of single cells into targeted microwells.
To evaluate the accuracy, efficiency, purity, and viability of the developed cell sorting technique.

Main Methods:

Development of microfabricated, releasable pallets for cell culture and a microwell array in poly(dimethylsiloxane) (PDMS).
Utilized a pulsed Nd:YAG laser for targeted detachment and transfer of individual pallets with cells into designated microwells.
Employed a custom-designed stage for independent positioning of the pallet array relative to the microwell array.

Main Results:

Achieved 94% accuracy and 100% collection efficiency in a large-scale sort (n=401), with minimal multiple pallet occurrences (4%).
Cell sorting experiments yielded 91% for target cells and 93% purity, based on fluorescence signature.
Demonstrated a cell viability of 77% at 72 hours post-collection, assessed by single-cell cloning efficiency.

Conclusions:

The demonstrated laser-actuated pallet system offers a precise and efficient method for single-cell isolation and collection.
This technique shows significant potential for applications requiring high-purity cell sorting and subsequent cell culture or analysis.