Li, Li, Lu, Yang-3 and Jia, Huang (2025) Optical and Electrical Dual-Mode Detection of a Carcinogenic Substance Based on Synergy of Liquid Crystals and Ionic Liquids. ACS Sensors. ISSN 2379-36942379-3694

Abstract

Visual, sensitive, and selective detection of carcinogenic substances is highly
desired in portable health protection and practical medicine production. However,
achieving this goal presents significant challenges with the traditional single-mode sensors
reported so far, as they have limited sensing mechanisms and provide only a single output
signal. Here, we report an effective optical and electrical dual-mode sensor for the visual,
sensitive, and selective detection of N-nitrosodiethylamine (NDEA), a typical volatile
carcinogenic substance, leveraging the synergy of ionic liquid-doped liquid crystals (ILLC).
The optical mode derived from LCs provides the sensor with a visual identification
recognizable by the naked eye, while the electrical mode derived from ILs offers a
quantitative detection capability. It is noteworthy that the synergistic effect of the IL and
LC enhances the performance of both optical and electrical modes. Unique sensing
mechanisms derived from the interaction between NDEA and IL-LC endow the sensor
with excellent selectivity. As a proof of concept, a portable kit based on a dual-mode sensor
has been developed for the real-time and on-site analysis of N-nitrosamine impurities in pharmaceuticals. This work provides
valuable insights and a theoretical foundation for developing portable multimode chemical sensors.

Item Type:	Article
Date Deposited:	18 Jan 2025 00:45
Last Modified:	18 Jan 2025 00:45
URI:	https://oak.novartis.com/id/eprint/54638