Department of Science & Technology Centre on Biomolecular Electronics, National Physical Laboratory (Council of Scientific and Industrial Research), Dr. K.S. Krishnan Marg, New Delhi 110012, India.
J Mol Recognit. 2011 Jul-Aug;24(4):700-6. doi: 10.1002/jmr.1104.
Molecularly imprinted polyaniline (PANI) film (∼ 100 nm thick) has been electrochemically fabricated onto indium-tin-oxide (ITO) coated glass plate using ascorbic acid (AA) as template molecule. Fourier transform infra-red spectroscopy, scanning electron microscopy, cyclic voltammetry and differential pulse voltammetry (DPV) studies indicate the presence of AA in PANI matrix, which also acts as a dopant for PANI. Further, the AA selective molecularly imprinted PANI electrode (AA-MI-PANI/ITO) has been developed via over-oxidation of AA doped PANI electrode which leads to the removal of AA moieties from PANI film. The response studies using DPV technique have revealed that this molecularly imprinted AA-MI-PANI/ITO electrode can detect AA in the range of 0.05-0.4 mM with detection limit of 0.018 mM and sensitivity of 1.2 × 10(-5) AmM(-1). Interestingly, this AA-MI-PANI/ITO electrode shows excellent reusability, selectivity and stability.
电化学聚合法在掺锡氧化铟（ITO）玻璃基底上制备了约 100nm 厚的分子印迹聚苯胺（PANI）薄膜，使用抗坏血酸（AA）作为模板分子。傅里叶变换红外光谱、扫描电子显微镜、循环伏安法和差分脉冲伏安法（DPV）研究表明，AA 存在于 PANI 基质中，它也作为 PANI 的掺杂剂。此外，通过过氧化掺杂 AA 的 PANI 电极，制备了 AA 选择性分子印迹聚苯胺电极（AA-MI-PANI/ITO），这导致从 PANI 薄膜中去除 AA 部分。使用 DPV 技术的响应研究表明，这种分子印迹的 AA-MI-PANI/ITO 电极可以在 0.05-0.4mM 的范围内检测 AA，检测限为 0.018mM，灵敏度为 1.2×10(-5)AmM(-1)。有趣的是，这种 AA-MI-PANI/ITO 电极表现出良好的可重复使用性、选择性和稳定性。
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