In this study, we have synthesized a composite using carbon material derived from bio-inspired onion peel morphology like 2D trigona carbon nano petals (TCP) incorporated with ferrocene (FC). The FC is added with the purpose of improving the electrochemical behaviour of TCP. Further, to increase the number of electrochemically active sites in the composite, gold nanoparticles (AuNPs) were again decorated on TCP/FC, and thus derived electrochemically active TCP/FC/AuNPs nanocomposite. We have characterized the properties and surface morphology of this nanocomposite through spectroscopic and microscopic techniques. Further, using this nanocomposite for surface modification of glassy carbon electrode, we have developed an efficient GCE-TCP/FC/AuNPs electrode. The electrochemical efficiency of this electrode has been inspected through sensing and quantification of pharmaceutically valuable biomolecule dopamine through CV, DPV and square wave voltammetry techniques. The observed CV results reveals that the newly designed GCE-TCP/FC/AuNPs electrode has an ability to detect the dopamine with wide linear range of concentration from 5.96 × 10^-6 to 0.1 × 10^-4 M and its limit of detection was 2.9 × 10^-6 M under 0.1 M phosphate buffer medium (pH 7.0). Therefore, it is important to mention here that this newly fabricated electrode can very well be used for real time sample analysis for sensing and detection of dopamine as it plays a key role in the neurotransmission and causes several diseases.

中文翻译：

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三角碳纳米花瓣/二茂铁/金纳米颗粒纳米复合材料修饰玻碳电极用于多巴胺的电化学检测

在这项研究中，我们已经使用碳材料合成了一种复合材料，该材料是由受生物启发的洋葱皮形态（例如与二茂铁（FC）结合的2D三角碳纳米花瓣（TCP））衍生的。添加FC是为了改善TCP的电化学行为。此外，为了增加复合物中电化学活性位点的数量，再次在TCP / FC上修饰了金纳米颗粒（AuNPs），从而得到了电化学活性TCP / FC / AuNPs纳米复合材料。我们已经通过光谱学和显微镜技术表征了这种纳米复合材料的性质和表面形态。此外，使用这种纳米复合材料对玻碳电极进行表面修饰，我们开发了一种高效的GCE-TCP / FC / AuNPs电极。该电极的电化学效率已通过CV，DPV和方波伏安技术检测和定量了药学上有价值的生物分子多巴胺，从而得到了检验。观察到的CV结果表明，新设计的GCE-TCP / FC / AuNPs电极具有检测多巴胺的能力，其浓度线性范围为5.96×10^-6至0.1×10 ^-4 M，在0.1 M磷酸盐缓冲液（pH 7.0）下，检出限为2.9×10 ^-6M。因此，在这里必须提及的是，这种新制造的电极可以很好地用于实时样品分析，以感测和检测多巴胺，因为它在神经传递中起关键作用并引起多种疾病。