| With the rapid development of nanotechnology,the research of nanomaterials has become a hot spot of scientific research.Compared with the traditional biosensors,the nano biosensors made of nano materials have the advantages of fast response,high sensitivity,wide detection range,low price and low detection limit,which are widely used in production and life,medical treatment,environment,military science and technology and other fields.As a new functional material,the two-dimensional nano film material has a good application prospect in many fields.In this paper,based on the alumina template,two-dimensional nano film electrode was prepared by vacuum thermal evaporation,electrochemical deposition,magnetron sputtering and other methods.The composition,crystal structure and morphology of the film were characterized by SEM,XRD,TEM,EDS and so on.Then the sensing performance was studied by electrochemical analyzer.The specific research contents are as follows:?1?Synthesis and electrochemical sensing properties of Cu/Au Ordered Nanoporous Film:A highly ordered AAO template was prepared by secondary anodizing at 45 V of 0.3mol/L oxalic acid.Then a layer of Au was deposited on the AAO template surface by DC sputtering as a conductive electrode,and then a layer of Cu film was deposited on the gold-plated template surface by thermal evaporation coating.The ordered nanoporous Cu/Au array film would be obtained after dissolving the template.The prepared porous film consisted of ordered hexagonal array of concave nanoholes with an inner hole diameter of 25nm,a mouth diameter of 60 nm,and a periodic distance of 115 nm.The prepared Cu/Au nanoporous film can be transferred onto an ITO substrate to be used directly as an effective non-enzymatic ascorbic acid sensor.It exhibited excellent electrocatalytic performance with a low detection limit of 0.2?M,a wide linear range of 2?M to 6 m M,and a high sensitivity of2207?A mM-1?cm-2.The satisfactory results obtained indicated that the proposed sensor electrode was promising for the development of a novel strategy for AA detection.?2?Synthesis and electrochemical sensing properties of Cu/Ni/Au Ordered Nanoporous Film:Ordered nanoporous Cu/Ni/Au film was prepared by electrochemical deposition and magnetron sputtering using an anodic aluminium oxide template.The fabricated porous film has a uniform hexagonal pore size structure,a long-range ordered arrangement,and a pore diameter of approximately 40 nm.Following the dissolution of the template,the independent Cu/Ni/Au film is devolved to ITO substrate as an effective non-enzyme glucose detection sensor.The sensor has good electrocatalytic performance with two specific linear ranges of0.5?M to 3.0 mM and 3.0–7.0 mM and high sensitivities of 4135 and 2972?A·mM-1cm-2,respectively.The lower detection limit was 0.1?M with a signal-to-noise ratio of 3.Additionally,the sensor features excellent selectivity and stability.These satisfactory results indicate that Cu/Ni/Au film is a promising platform for the development of non-enzymatic glucose sensors.?3?Synthesis and electrochemical sensing properties of Cu/Mo/Au Ordered Nanoporous Film:Based on the alumina template,Cu/Mo/Au nanopore array thin film was prepared by magnetron sputtering.After the alumina template was removed by alkaline solution,the Cu/Mo/Au nanopore array thin film was transferred to ITO surface by floating transfer technology.The hydrogen peroxide electrode based on Cu/Mo/Au thin film was prepared as hydrogen peroxide detection sensor.Its morphology and composition were characterized by SEM and XRD.The results show that the enzyme electrode has better selectivity,but the stability is poor,the cost is expensive,the preparation of enzyme-free electrode method is simple,the template pore diameter is controllable,the selection of materials is universal and cheap,and it has more development prospects,which provides a reliable scheme for the preparation of higher hydrogen peroxide detection electrode materials. |
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