The University of Southampton
University of Southampton Institutional Repository

Improved sensitivity and limit-of-detection of lateral flow devices using spatial constrictions of the flow-path

Improved sensitivity and limit-of-detection of lateral flow devices using spatial constrictions of the flow-path
Improved sensitivity and limit-of-detection of lateral flow devices using spatial constrictions of the flow-path
We report on the use of a laser-direct write (LDW) technique that allows the fabrication of lateral flow devices with enhanced sensitivity and limit of detection. This manufacturing technique comprises the dispensing of a liquid photopolymer at specific regions of a nitrocellulose membrane and its subsequent photopolymerisation to create impermeable walls inside the volume of the membrane. These polymerised structures are intentionally designed to create fluidic channels which are constricted over a specific length that spans the test zone within which the sample interacts with pre-deposited reagents. Experiments were conducted to show how these constrictions alter the fluid flow rate and the test zone area within the constricted channel geometries. The slower flow rate and smaller test zone area result in the increased sensitivity and lowered limit of detection for these devices. We have quantified these via the improved performance of a C-Reactive Protein (CRP) sandwich assay on our lateral flow devices with constricted flow paths which demonstrate an improvement in its sensitivity by 62x and in its limit of detection by 30x when compared to a standard lateral flow CRP device.
0956-5663
95-100
Katis, Ioannis
f92dfb8f-610d-4877-83f6-fd26a571df12
He, Peijun
2e303166-6aa5-4a09-b22e-440d96a54a9f
Eason, Robert
e38684c3-d18c-41b9-a4aa-def67283b020
Sones, Collin
9de9d8ee-d394-46a5-80b7-e341c0eed0a8
Katis, Ioannis
f92dfb8f-610d-4877-83f6-fd26a571df12
He, Peijun
2e303166-6aa5-4a09-b22e-440d96a54a9f
Eason, Robert
e38684c3-d18c-41b9-a4aa-def67283b020
Sones, Collin
9de9d8ee-d394-46a5-80b7-e341c0eed0a8

Katis, Ioannis, He, Peijun, Eason, Robert and Sones, Collin (2018) Improved sensitivity and limit-of-detection of lateral flow devices using spatial constrictions of the flow-path. Biosensors & Bioelectronics, 113, 95-100.

Record type: Article

Abstract

We report on the use of a laser-direct write (LDW) technique that allows the fabrication of lateral flow devices with enhanced sensitivity and limit of detection. This manufacturing technique comprises the dispensing of a liquid photopolymer at specific regions of a nitrocellulose membrane and its subsequent photopolymerisation to create impermeable walls inside the volume of the membrane. These polymerised structures are intentionally designed to create fluidic channels which are constricted over a specific length that spans the test zone within which the sample interacts with pre-deposited reagents. Experiments were conducted to show how these constrictions alter the fluid flow rate and the test zone area within the constricted channel geometries. The slower flow rate and smaller test zone area result in the increased sensitivity and lowered limit of detection for these devices. We have quantified these via the improved performance of a C-Reactive Protein (CRP) sandwich assay on our lateral flow devices with constricted flow paths which demonstrate an improvement in its sensitivity by 62x and in its limit of detection by 30x when compared to a standard lateral flow CRP device.

Text Biosensors Increased sensitivity paper - Accepted Manuscript
Restricted to Repository staff only until 2 August 2019.
Request a copy

More information

In preparation date: 2018
Accepted/In Press date: 2 May 2018
Published date: 15 August 2018

Identifiers

Local EPrints ID: 417094
URI: https://eprints.soton.ac.uk/id/eprint/417094
ISSN: 0956-5663
PURE UUID: 8c07e802-392c-4ac7-8af0-642c94650dd3
ORCID for Ioannis Katis: ORCID iD orcid.org/0000-0002-2016-557X
ORCID for Robert Eason: ORCID iD orcid.org/0000-0001-9704-2204

Catalogue record

Date deposited: 19 Jan 2018 17:30
Last modified: 06 Jun 2018 13:13

Export record

Contributors

Author: Ioannis Katis ORCID iD
Author: Peijun He
Author: Robert Eason ORCID iD
Author: Collin Sones

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×