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3D printed liquid cooling interface for a deep-UV-LED-based flow-through absorbance detector


Lam, SC and Gupta, V and Haddad, PR and Paull, B, 3D printed liquid cooling interface for a deep-UV-LED-based flow-through absorbance detector, Analytical Chemistry, 91, (14) pp. 8795−8800. ISSN 0003-2700 (2019) [Refereed Article]

Copyright Statement

Copyright 2019 American Chemical Society

DOI: doi:10.1021/acs.analchem.9b01335


Ultraviolet (UV)-light-emitting diodes (LEDs) are now widely used in analytical absorbance-based detectors; as compared to conventional UV lamps, they offer lower cost, faster response time, and higher photon conversion efficiency. However, current generation deep-UV-LEDs produce excess heat when operated at normal operating currents, which affects output stability and reduces their overall performance and lifespan. Herein a 3D printed liquid cooling interface has been developed for a deep-UV-LED-based optical detector, for capillary format flow-through detection. The interface consists of a circular channel that is tightly wrapped around the LED to provide active liquid cooling. The design also facilitates easy plug-and-play assembly of the various essential components of the detector: specifically, a 255 nm UV-LED, a capillary Z-cell, and a broadband UV photodiode (PD). The unique liquid cooling interface improved the performance of the detector by reducing the LED temperature up to 22C, increasing the spectral output up to 34%, decreasing the required stabilization time by up to 6-fold, and reducing the baseline noise and limits of detection (LODs) by a factor of 2. The detector was successfully used within a capillary HPLC system and could offer a miniaturized, rapidly stabilized, highly sensitive, and low-cost alternative to conventional UV detectors.

Item Details

Item Type:Refereed Article
Keywords:deep-UV-LED, liquid cooling, 3D printing, capillary LC, detector
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Lam, SC (Mr Shing Chung Lam)
UTAS Author:Gupta, V (Dr Vipul Gupta)
UTAS Author:Haddad, PR (Professor Paul Haddad)
UTAS Author:Paull, B (Professor Brett Paull)
ID Code:135078
Year Published:2019
Web of Science® Times Cited:15
Deposited By:Chemistry
Deposited On:2019-09-26
Last Modified:2022-08-22

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