Abstract
A kind of nanofiber-enclosed nanoporous structure is fabricated from a Cu-Ti glassy film by dealloying in an alkaline solution. The Cu-Ti glassy films are prepared by a combination of electron beam evaporation of pure Ti and resistance thermal evaporation of pure Cu. The dealloyed films mainly consist of titanium dioxide and a Cu4Ti3 intermetallic compound. Transient photocurrent response tests show that the obtained nanostructured films have considerable ultraviolet light photoresponse activity and exhibit both the typical n-type and p-type currents under UV-irradiation (wavelength λ = 365 nm). The mechanism is discussed in relation to the special nanostructure of the dealloyed films. The results demonstrate that the dealloyed Cu-Ti glasses have potential for applications in photocurrent detectors.
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