본 연구에서는 샤프심 전극(pencil graphite electrode; PGE)과 전도성 고분자(conducting polymer)인 폴리아닐린

(Polyaniline; PANI)와 폴리피롤(Polypyrrole; PPy)의 폴리아로마틱 복합체(polyaromatic composite)를 접목하여 전극 소

재를 개발하고 비효소적 글루코스에 대한 검출 성능을 분석하였다. PANI-PPy 복합체는 전처리된 PGE 표면에 전기화

학적 중합법을 통해 직접 합성되었으며, 제작된 PANI/PPy/PGE 전극의 전기화학적 특성은 순환전압 전류법(CV)과 전

기화학 임피던스(EIS) 분석법, 시간대전류법(CA)을 이용하여 분석되었다. π-전자가 풍부한 전도성 고분자 PANI와 PPy

의 시너지 효과에 의해 효율적인 전자전달과 향상된 전도도, 넓은 유효면적 등 전기화학적 특성과 기계적 안정성이 향

상되었다. 이런 특성들 덕분에 PANI/PPy/PGE 전극 기반의 비효소적 글루코스 센서는 저농도 선형 농도 구간(0.012~

0.089 mM)과 고농도 구간(0.668~6.67 mM)에서 각각 682.76 μA/mM·cm2와 87.13 μA/mM·cm2의 감도를 보이며, 금

속 사용 없이도 전기화학적 센싱 성능이 개선되었다. 본 연구를 기반으로 다양한 표면 개질을 통해 저비용, 고성능 일

회용 전극 소재 및 센서 개발에 효과적으로 응용될 수 있을 것으로 기대된다.

We developed an electrode material by integrating a pencil graphite electrode (PGE) with a polyaromatic

composite of conductive polymers polyaniline (PANI) and polypyrrole (PPy), and analyzed its detection performance for

non-enzymatic glucose. The PANI-PPy composite was directly synthesized on the pretreated PGE surface via electrochemical

polymerization. The electrochemical properties of the fabricated PANI/PPy/PGE electrode were analyzed using cyclic

voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). The synergistic effects of

π-electron-rich conductive polymers PANI and PPy resulted in improved electrochemical properties such as efficient

electron transfer, enhanced conductivity, large effective surface area, and improved electrochemical and mechanical stability.

Due to these characteristics, the non-enzymatic glucose sensor based on the PANI/PPy/PANI electrode exhibited sensitivities

of 682.76 μA/mM·cm2 and 87.13 μA/mM·cm2 in the low-concentration linear range (0.012~0.089 mM) and high-concentration

range (0.068~6.67 mM), respectively. Consequently, the developed electrode demonstrated improved electrochemical sensing

performance for non-enzymatic glucose detection without the use of metals. Based on this study, it is expected to be effectively

applicable to the development of low-cost, high-performance disposable electrode materials and sensors through various

surface modifications.

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