Transport of charge carriers in percolating nanocluster devices based on bimetallic PdCu nanoclusters was investigated in this work. The device was fabricated by self-assembly of the nanoclusters between electrical el...Transport of charge carriers in percolating nanocluster devices based on bimetallic PdCu nanoclusters was investigated in this work. The device was fabricated by self-assembly of the nanoclusters between electrical electrodes inside an ultra-high vacuum compatible system. The average size of the produced nanoclusters was 7.3 nm, and the composition was Pdo.77Cuo.23. Systematic in situ current-voltage measurements as a function of temperature were per- formed which provide a conductance-temperature profile. The results are explained in terms of the charge carriers＇ tunneling through small potential barriers at the junctions between nanoclusters. The results predict the size of the nanoclusters as well as the magnitude of the potential difference of the tunneling barriers. This investigation helps understanding the nature of the interface between the nanoclusters and the charge carrier transport within those devices to be utilized for optimizing gas sensing properties of PdCu nanocluster devices.展开更多
葡萄糖是血糖含量的指标。在人体血糖含量上升的过程中,通常伴随着人体某些疾病的产生,比如高血压、高血脂、眼疾等。因此,快速、简便、灵敏的定量检测葡萄糖对临床分析与诊断具有重要意义。研究发现,以DNA为模板合成的银铂双金属纳米...葡萄糖是血糖含量的指标。在人体血糖含量上升的过程中,通常伴随着人体某些疾病的产生,比如高血压、高血脂、眼疾等。因此,快速、简便、灵敏的定量检测葡萄糖对临床分析与诊断具有重要意义。研究发现,以DNA为模板合成的银铂双金属纳米簇具有过氧化物模拟酶活性,其催化能力强弱在一定范围内依赖于H 2 O 2的浓度。基于此特性,文章构建了一种比色传感器用于葡萄糖的检测。实验结果表明,在最佳条件下,该比色传感器对葡萄糖的检测范围为400~900μmol/L,检测限为200μmol/L,且传感器对葡萄糖的检测具有高选择性,并可应用于实际血清样品中葡萄糖的检测。该比色传感器成本低、操作简便、灵敏度高、选择性好,具有潜在的应用价值。展开更多
基金supported by the United Arab Emirates University under a Grant number FOS/IRG-23/11
文摘Transport of charge carriers in percolating nanocluster devices based on bimetallic PdCu nanoclusters was investigated in this work. The device was fabricated by self-assembly of the nanoclusters between electrical electrodes inside an ultra-high vacuum compatible system. The average size of the produced nanoclusters was 7.3 nm, and the composition was Pdo.77Cuo.23. Systematic in situ current-voltage measurements as a function of temperature were per- formed which provide a conductance-temperature profile. The results are explained in terms of the charge carriers＇ tunneling through small potential barriers at the junctions between nanoclusters. The results predict the size of the nanoclusters as well as the magnitude of the potential difference of the tunneling barriers. This investigation helps understanding the nature of the interface between the nanoclusters and the charge carrier transport within those devices to be utilized for optimizing gas sensing properties of PdCu nanocluster devices.
文摘葡萄糖是血糖含量的指标。在人体血糖含量上升的过程中,通常伴随着人体某些疾病的产生,比如高血压、高血脂、眼疾等。因此,快速、简便、灵敏的定量检测葡萄糖对临床分析与诊断具有重要意义。研究发现,以DNA为模板合成的银铂双金属纳米簇具有过氧化物模拟酶活性,其催化能力强弱在一定范围内依赖于H 2 O 2的浓度。基于此特性,文章构建了一种比色传感器用于葡萄糖的检测。实验结果表明,在最佳条件下,该比色传感器对葡萄糖的检测范围为400~900μmol/L,检测限为200μmol/L,且传感器对葡萄糖的检测具有高选择性,并可应用于实际血清样品中葡萄糖的检测。该比色传感器成本低、操作简便、灵敏度高、选择性好,具有潜在的应用价值。
