Integration of bacteria-imprinted polymer with aluminium transducers: Polymeric electrical behaviour to ionic species

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-03-02 DOI:10.1016/j.jtice.2025.106061

Sing-Mei Tan , Subash C.B. Gopinath , Mohd Luqman Hakim Abdul Ghani , Hemavathi Krishnan , Jia-Chun Lim , Emily M.Y. Chow , Pachaiappan Raman

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Abstract

Background

Confronted with escalating public health issues exacerbated by bacterial infections, introducing a cost-effective and reliable approach for rapid bacteria detection is imperative.

Methods

In this research, bacteria-imprinted polymers (BIPs) technology targeting Bacillus subtilis was developed and characterised with Raman Spectroscopy and Fourier Transform Infrared Spectroscopy (FTIR). The BIPs were then incorporated into our newly designed capsula capacitive proximity electrode (CapCPE) sensor. Successful deposition of BIPs was validated by scanning electron microscopy (SEM), while the average thickness of the BIP coating was recorded as ∼ 3.0 µm. The current responses of both the bare device and BIP-CapCPE to different pH levels were examined.

Significant Findings

The results revealed that the bare device generated a maximum current of 7.55×10⁻⁴ A in a highly acidic medium. In contrast, the BIP-coated device exhibited a maximum current of 1.0 × 10⁻⁴ A in a highly alkaline medium, attributed to increased charge carrier density from the carboxyl group deprotonation in recognition cavities. Moreover, the mechanistic insights into the impact of strong electrolytes on BIP-coated electronic sensors were further proposed and elucidated. Electrochemical impedance spectroscopy (EIS) was additionally employed to reveal the impedimetric and capacitive behaviours of the devices in varied pH media.

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.