The efficiency of cyclodextrin-carbon nanotube composites (CD-CNT) for cholesterol detection was investigated using their fluorescent yields in the presence of rhodamine 6G (R6G). The CD-CNT composites using α-, β- and γ-cyclodextrin (x-CD) all showed strong fluorescent responses to cholesterol when in the presence of R6G. The α-CD based composites, however, exhibit more dramatic fluorescent changes in response to cholesterol, over a wider range of cholesterol concentrations, and also display the highest binding constant of 2.98x10⁵ M^-1 with cholesterol. The effectiveness of these fluorescent responses for the detection of cholesterol depends primarily on the concentration and cavity size of the CD.

中文翻译：

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环糊精-碳纳米管复合材料用于胆固醇的荧光检测

在若丹明6G（R6G）的存在下，使用环糊精-碳纳米管复合材料（CD-CNT）的荧光产率研究了其胆固醇的检测效率。当存在R6G时，使用α-，β-和γ-环糊精（x-CD）的CD-CNT复合材料均显示出对胆固醇的强烈荧光响应。然而，基于α-CD的复合材料在更宽的胆固醇浓度范围内，响应胆固醇表现出更显着的荧光变化，并且还显示出与胆固醇的最高结合常数2.98x10 ⁵ M ^-1。这些荧光反应对检测胆固醇的有效性主要取决于CD的浓度和空腔大小。