A Study On Fabrication And Optical Absorption Property Of Ordered Copper Nanowire Arrays

Compared with traditional materials,nanomaterials have physical properties such as surface and interface effect,the quantum size effect.The nanomaterials have novel optical absorption property due to the interaction between the electromagnetic waves and nanostructures.Nanoscale optical absorption materials have many potential applications in the fields of blackbody radiation,biosensors,optical detection and solar cells.So,nanoscale optical absorption materials have received considerable attention on account of their potential applications in recent years.The microstructure of nanomaterials has a great influence on the optical absorption property.In this thesis,we demonstrate our research work on the optical absorption property of adjusting surface microstructure of the sample.The purpose of paper is to enhance and adjust optical absorbed efficiency.The first part is the preparation and optical absorption property of copper nanowire arrays.In this thesis,the copper nanowire arrays were deposited in the alumina template by alternating current electrodeposition,and copper nanowire arrays with outcrop were obtained by chemical etching.Then a layer of copper film was sputtered on the outcrop copper nanowire arrays by magnetron sputtering,and the nanowire array was "planted" into the copper film.Finally,copper nanowire arrays embedded in copper film were obtained.Here,the copper nanowire arrays were characterized by XRD and SEM,indicating that the copper nanowire arrays with a pronged were successfully prepared by us.Then,the absorption spectrum obtained by UV-visible absorption spectra measurement show that the copper nanowire arrays have high optical absorption efficiency(?90%)in the wide wavelength range of 300-2000 nm.The second part is the copper nanotube array film and its optical absorption property.In this thesis,the copper nanotube array was formed on the inner wall of anodic alumina template with large aperture by brief methods of magnetron sputtering and chemical corrosion.Here,the copper nanotubes were characterized by XRD and SEM,indicating that the Cu nanotubes were successfully prepared by us.Our study found that the different magnetron sputtering rates have a great influence on the thickness of tube wall of copper nanotube,and the thickness of nanotube wall can be controlled.In addition,the corrosion time has a great influence on the morphology of copper nanotubes.The absorption spectrum obtained by UV-visible absorption spectra measurement is indicate that the Copper nanotubes have high optical absorption efficiency(?90%)in the wide wavelength range of 300-2000 nm.In conclusion,we successfully fabricated nanowires or nanotubes with regular arrays through nanotechnology.The absorption spectrum is indicating that nanobrushes and nanotubes have high absorption efficiency(?95%)in the wide wavelength range of 300-2000 nm.The broadband perfect absorbable materials prepared by us have potential applications in stealth materials,solar cells and infrared absorption materials.