Creating a sensitive chemical detector using optical trapping
27 Apr 2023
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Dr Susan Quinn (University College Dublin) used optical trapping at Octopus to investigate the synthesis of gold coated particles to create a sensitive chemical detector. They hope to continue to develop this research for biomedical applications.

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Materials Advances front cover illustrated by Helen Towrie. Shows gold coated particles held between two laser beams
 
Four different microscopy images of the gold coated surfaced used in the study. Contains spherical shapes with rough surfaces
The researchers performed spectroscopy studies in the CLF Octopus facility using optical trapping and measuring the uptake of the trace chemical. Here, an effect called surface enhanced Raman spectroscopy (SERS) aided the detection process.

SERS is a technique that enhances Raman scattering by having molecules absorbed on rough metal surfaces or using nanostructures. The Raman scattering is enhanced enough that very low concentrations may be detected, which is something normal Raman scattering cannot achieve. Dr Susan Quinn investigated one such substrate: porous carbon microspheres with high loadings of gold nanoparticles. 

Materials Advances front cover illustrated by Helen Towrie. Shows gold coated particles held between two laser beams

This research is intended to allow the development of SERS probes to report on biological environments. These probes have potential applications across biomedical fields, ranging from seeking to make radiation therapy more effective to cellular imaging.

Dr Quinn's research was featured on the front cover of Materials ​Advances, featuring an illustration created by CLF Impact and Engagement Officer Helen Towrie.

Find out more by reading the publication in Materials Advances.


Contact: Snelgrove, Kaylyn (STFC,RAL,CLF)