Concentrating and Sensing Analytes with Integrated Plasmonic Lens Array

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Current state of the art technologies used in micro- and nanoscale lenses for sorting and sensing concentrations of particles are unable to perform multisite sorting and sensing on a self-contained lab-on-a-chip platform. This severely limits throughput potential and sensing speeds. In addition, current technologies cannot sense well in a media with low analyte concentration due to diffusion-limited transport of target analytes and their limited number of sensing sites.

Researchers at Purdue University have developed an array of microsized lenses that are used to focus light from an unfocussed source onto multiple focused spots. These focused spots contain plasmonic components made of arrays of plasmonic nanostructures. The light incident on the plasmonic components induces hydrodynamic flows, resulting in the rapid transport of suspended particles, bringing them to the surface of the components where they are captured. The self-contained lab-on-a-chip platform enhances the throughput performance, and the ability to utilize hundreds to thousands of trapping sites allows this platform to greatly outperform current technologies in the sensing of particles in media with low analyte concentrations. Existing solutions are also very expensive, whereas this technology can utilize multifunctional, inexpensive light sources to outperform the more expensive alternatives.

-Less costly
-Enhanced throughput performance
-Utilizes hundreds to thousands of trapping sites

Potential Applications:
-Detection of contaminants in biological samples
-Testing quality of drinking water or cleaning solutions
-Testing cleanliness of power generation equipment, manufacturing parts, or injectable drugs
-Determine cleanliness level of hydraulic fluids
Jun 6, 2016
Utility Patent
United States
Oct 8, 2019

Jun 4, 2015
United States
Purdue Office of Technology Commercialization
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