审稿意见求助:“Finally, this reviewer has concerns about the specificity of the Cu NCs. Since, as stated in the Introduction, there are many reported Cu NCs for the detection of different analytes how can the authors declare that the system is specific for DA without a proper biorecognition layer? It is preferable to add some sentences about the non-specific nature of the proposed probe and clarify its use as a preliminary screener.” 合成了一个已经报道的铜纳米颗粒,用于检测DA,主要是基于荧光淬灭原理检测的,但是审稿人觉得,既然已经可以检测很多物质,这个颗粒上也没有特异性探针,为什么可以特异性检测DA呢?